Ergon Energy Corporation Limited · 2015-08-06 · Technical Specification for 24kV Padmounted Substations Page 2 of 84 Specification ETS02-02-02 Ver 10 Ergon Energy Corporation Limited

Specification ETS02-02-02 Ver 10

Ergon Energy Corporation Limited ABN 50 087 646 062

Ergon Energy Corporation Limited

Technical Specification for 24kV Padmounted Substations

ETS02-02-02


i Specification ETS02-02-02 Ver 10


Contents 1. Purpose and Scope...................................................................................................... 1

2. References.................................................................................................................... 2

2.1 Applicable Standards .......................................................................................... 2

2.2 Inconsistencies ................................................................................................... 3

2.3 International Standards....................................................................................... 3

3. Drawings....................................................................................................................... 3

3.1 Drawings by the Purchaser ................................................................................. 3

3.2 Specification Drawings........................................................................................ 3

4. Service Conditions....................................................................................................... 4

4.1 Environmental Conditions ................................................................................... 4

4.2 System Conditions .............................................................................................. 5

5. Design and Construction ............................................................................................ 5

5.1 Arrangement of Equipment ................................................................................. 5

5.2 Cubicle................................................................................................................ 6

5.3 Plinth................................................................................................................... 9

5.4 Loading of Transformers..................................................................................... 9

5.5 Transformer Minimum Energy Performance Levels............................................ 9

5.6 Transformer Winding Connections.................................................................... 10

5.7 Transformer Tapping Arrangements ................................................................. 10

5.8 Sound Level ...................................................................................................... 10

5.9 Impedance Voltage Of The Transformer........................................................... 11

5.10 Cooling Of The Transformer ............................................................................. 11

5.11 Drying Out And Oil Filling Of The Transformer Before Delivery ........................ 11

5.12 Radio And Television Interference .................................................................... 11

5.13 Transformer Hv Terminals ................................................................................ 11

5.14 Transformer Lv Terminals ................................................................................. 11

5.15 Transformer Construction ................................................................................. 12

5.16 Transformer Fittings.......................................................................................... 13

5.17 High Voltage Switchgear................................................................................... 15


ii Specification ETS02-02-02 Ver 10


5.18 Detailed Hv Switchgear Requirements ............................................................. 21

5.19 Low Voltage Switchgear ................................................................................... 22

5.20 Detailed Lv Switchboard Requirements ............................................................ 26

5.21 Nameplates and Labelling ................................................................................ 28

5.22 Silver Plated Components ................................................................................ 30

5.23 Protective Coating............................................................................................. 30

5.24 Comparison of Tenders .................................................................................... 30

5.25 Spare Parts ....................................................................................................... 31

6. Performance and Testing .......................................................................................... 31

6.1 Type Tests on Each Design .............................................................................. 31

6.2 Routine Tests on Each Padmounted Substation............................................... 32

6.3 Prototype Units ................................................................................................. 32

6.4 Repeat Type Tests............................................................................................ 33

6.5 Temperature Rise Type Test ............................................................................ 33

6.6 Overload Temperature Rise Type Test............................................................. 33

6.7 Short Circuit Type Tests ................................................................................... 33

6.8 Routine Pressure Tests .................................................................................... 33

6.9 Partial Discharge Tests..................................................................................... 34

6.10 Current Transformer Type Tests....................................................................... 34

6.11 Batch Tests ....................................................................................................... 34

6.12 Porosity Tests ................................................................................................... 34

6.13 Acceptance Tests ............................................................................................. 34

6.14 Witnessing Of Tests.......................................................................................... 34

6.15 Test Certificates ................................................................................................ 34

7. Risk Assessment ....................................................................................................... 35

7.1 Compliance....................................................................................................... 35

7.2 Formal Risk Assessment .................................................................................. 35

7.3 Hazards ............................................................................................................ 35

8. Quality Assurance...................................................................................................... 35

8.1 Documentary Evidence..................................................................................... 35

9. Samples ...................................................................................................................... 36


iii Specification ETS02-02-02 Ver 10


9.1 Production Samples.......................................................................................... 36

10. Packaging and Marking ............................................................................................. 36

10.1 Method of Preservation And Packaging............................................................ 36

10.2 Marking of Goods for Delivery........................................................................... 36

11. Service Performance ................................................................................................. 36

12. Reliability .................................................................................................................... 37

12.1 Service Life ....................................................................................................... 37

12.2 Evidence in Support of Reliability...................................................................... 37

13. Training....................................................................................................................... 37

13.1 Training Material ............................................................................................... 37

13.2 Detailed Installation, Operation and Maintenance Manuals .............................. 37

14. Environmental Considerations ................................................................................. 38

14.1 Environmental Soundness ................................................................................ 38

14.2 EMF Levels ....................................................................................................... 38

15. Information to be Provided ....................................................................................... 38

15.1 Specific Technical Requirements...................................................................... 38

15.2 Checklist of Supporting Documentation ............................................................ 38

15.3 Drawings and Information to be Submitted with the Tender ............................. 38

15.4 Drawings and Information to be Provided by the Supplier ................................ 39

16. Quality of Drawings ................................................................................................... 40

16.1 Drawing Title Block ........................................................................................... 40

16.2 Drawing Revisions ............................................................................................ 40

16.3 Drawings in Electronic Format .......................................................................... 41

17. Attachment 1 – Specific Requirements.................................................................... 42

18. Attachment 2 – Technical Details to be Provided By Tenderers............................ 53

19. Attachment 3 – Recommended Spares.................................................................... 68

20. Attachment 4 – Risk Assessment............................................................................. 69

21. Attachment 5 – Technical Document Checklist ...................................................... 71

22. Attachment 6 – Drawings .......................................................................................... 73


Page 1 of 84 Specification ETS02-02-02 Ver 10


1. Purpose and Scope

This Specification sets out the technical requirements for the design, manufacture, testing at works and delivery of 24kV padmounted substations as detailed below:

Item No.

ERGON ENERGY

IIN Item Description

1 2408037

TRANSFORMER, Distribution, Padmount, 22kV/433-250V, 200kVA, 3 Ph, 50 Hz, ONAN, with LV Switchgear and HV SFU (1 x switch disconnector and 1 x fuse switch). (Rectangular plinth nominal size 1310mm x 4100mm), Tech Spec ETS02-02-02 Item 1

2 2424067 TRANSFORMER, Distribution, Padmount, 22kV/433-250V, 315kVA, 3 Ph, 50 Hz, ONAN, with LV Switchgear and no HV Switchgear, (Rectangular plinth nominal size 1310mm x 4100mm), Tech Spec ETS02-02-02 Item 2

3 2424075

TRANSFORMER, Distribution, Padmount, 22kV/433-250V, 315kVA, 3 Ph, 50 Hz, ONAN, with LV switchgear and HV RMU (2 x switch disconnectors and 1 x fuse switch). (Rectangular plinth nominal size 1310mm x 4100mm), Tech Spec ETS02-02-02 Item 3

4 2408078


5 2408052




8 2424083


9 2408110


10 2408094


11 2404657

TRANSFORMER, Distribution, Padmount, 22kV/433-250V, 1000kVA, 3 Ph, 50 Hz, ONAN, with LV Switchgear and no HV Switchgear, (Rectangular plinth nominal size 1310mm x 3700mm), Tech Spec ETS02-02-02 Item 11

12 2404659


13 2424091





Item No.

ERGON ENERGY


14 2408169


15 2408144


All the above items require the provision of Low Voltage monitoring functionality as specified in Technical Specification TS-479 LV Transformer Monitoring Capability Requirements for Pad Mount and Dry Type Transformers and as specified in this specification. These items shall be complete with all ancillary equipment.

2. References

2.1 Applicable Standards Substations shall be designed, manufactured and tested in accordance with the following Australian Standards and all amendments issued prior to the date of closing of tenders except where varied by this Specification.

STANDARD TITLE AS 1170 Structural design actions AS 1194 Winding wires – Enamelled round copper winding wires AS 1767 Insulating oil for transformers and switchgear. Note: Additional testing

and compliance requirements apply this technical specification AS 1856 Electroplated coatings - Silver AS 1940 The storage and handling of flammable and combustible liquids AS 2067 Switchgear assemblies and ancillary equipment for alternating voltages

above 1 kV AS/NZS 2312 Guide to the protection of structural steel against atmospheric corrosion AS 2374 Power Transformers AS 2602 Paints for Steel Structures AS 2650 Common specifications for high-voltage switchgear and controlgear

standards. AS 2700 Colour standards for general purposes AS/NZS 3439 Low-voltage switchgear and controlgear tested assemblies AS 3947.3 Low-voltage switchgear and controlgear – Switches, disconnectors,

switch-disconnectors and fuse combination units AS 4360 Risk Management AS 4398 Insulators – Ceramic and glass – Station post type for indoor and

outdoor use – Voltages greater than 1000 V ac AS 4680 Hot-dipped galvanized coatings on fabricated ferrous articles AS/NZS ISO 9001

Quality Management Systems

AS 60044.1 Instrument transformers – Current transformers AS 60076 Power transformers AS/NZS 60137 Insulated bushings for alternating voltages above 1000 V AS 60270 High Voltage test techniques – Partial discharge measurements AS 60529 Degrees of protection provided by enclosures (IP Code)




AS 60947 Low-voltage switchgear and controlgear - General rules AS 62103 Electronic equipment for use in power installations AS 62271.102 Alternating current disconnectors and earthing switches AS 62271.200 High-voltage switchgear and controlgear - A.C. metal-enclosed

switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV

AS 62271.202 High-voltage switchgear and controlgear Part 202: High-voltage/low-voltage prefabricated substation

AS 62271.301 High voltage switchgear and controlgear - Dimensional standardization of terminals

TS-479 LV Transformer Monitoring Capability Requirements for Pad Mount and Dry Type Transformers

Although it is the intent of the Purchaser at this time to adopt and rely upon AS 62271.202 as the main guiding standard of plant compliance for the items of this technical specification, the Tenderer is required to note any and all differences between AS 62271.202 and individual respective product standards for item components as offered for the Purchaser’s consideration. The Tenderer is to prove plant performance to the Purchaser’s satisfaction.

2.2 Inconsistencies Should inconsistencies be identified between Standards and/or this specification, the Tenderer/Supplier shall immediately refer such inconsistencies to the Purchaser for resolution.

2.3 International Standards If the equipment offered does not comply with Australian Standards, but complies with International Standards, eg IEC, then detailed descriptions will be given in English of the differences between the apparatus offered and the Australian Standards specified requirements. Note: The Purchaser will not accept equipment that does not comply in full with all relevant Queensland Health & Safety Acts/Regulations.

3. Drawings

3.1 Drawings by the Purchaser The following specification drawings are associated with this document.

3.2 Specification Drawings The following drawings are attached and form part of this specification: Drawing No. Description A3 889824-01 22kV Padmounted Substation

200/315/500/1000kVA 3.7m & 4.1m Long Typical Plinth and Plan View.

A3 889831-01 22kV Padmounted Substation Rectangular Type Elevations

A3 889843-01 22 kV Padmounted Substation and Cable Entry Transformers




A3 889847-01 22 kV Padmounted Substation Typical Freestanding LV Switchboard 200, 315, 500 kVA Substation

A3 889850-01 22 kV Padmounted Substation Typical Freestanding LV Switchboard 1000 kVA Substations

A3 889853-01 22 kV Padmounted Substation Typical Wiring Schematic for LV Switchboard 200, 315 and 500 kVA Substations

A3 889855-01 22 kV Padmounted Substation Typical Wiring Schematic for LV Switchboard for 1000 kVA Substations

22-A3-1124-01 22 kV Padmounted Substation Rectangular Type Location of Signs

A3 892291-01 22 kV Padmounted Substation Rectangular Type Door and Opening Restrictions

02-02-08 Transformers Padmounted Location of Operational Labels for Transformers using HV Equipment

02-02-12 Transformers Padmounted Standard Identification Equipment Signs for Padmounted Substations

A4 897447-01 Distribution Network Hardware Sign - Danger High Voltage

4. Service Conditions

4.1 Environmental Conditions The padmounted substations shall be suitable for mounting outdoors on level ground without additional enclosures and shall be designed to comply with AS 1170 and to withstand the service conditions of Clause 1.2 of AS60076.1 with the following additions:

Solar radiation level: 1 100 W/m² with high ultra violet content Precipitation: Tropical summer storms with high winds, and an annual

rainfall in excess of 1500 mm. Humidity: Extended periods of relative humidity in excess of 90% Pollution: Areas of coastal salt spray and industrial pollution with

equivalent salt deposit densities in the range 2.0 to 3.0 g/m².

Wind velocity: 210 km/hr Tenderers are to suitably de-rate switchgear installed in the HV and LV compartments to compensate for the increased temperatures inside the cubicle, with allowance for 40°C ambient air temperature and full loading of the transformer.




4.2 System Conditions Each unit shall be suitable for use under the following system conditions.

Highest System Voltage (kV) 24 Number of phases 3 Impulse Withstand Voltage (kV

peak) 150

Power Frequency Withstand Voltage

(kV) 50

Nominal System Voltage (kV) 22 System Earthing Effectively earthed

5. Design and Construction

5.1 Arrangement of Equipment Padmounted substations are installed on footpaths, residential, industrial and commercial premises accessible to the general public. Their overall design shall ensure against unauthorised access to the energised components within, as well as against danger to the public in the event of a component failure or contact with exposed transformer radiators, i.e. radiators shall be enclosed. The prefabricated substation which complies with the maximum outer dimensions outlined in Section 5.1.2 shall preferably be designed to conform with the internal arc withstand requirements of AS 62271.202, Annex A, A.2.3 Prefabricated substations classified IAC-A, for an IAC classification test prospective arc fault current of 20 kA for 1 second for 11 kV HV Switchgear including Cable Box. The Tenderer shall outline how the design meets the IAC Classification or outline development plans including timelines to meet the IAC Classification. The Purchaser reserves the right to negotiate a transition to the IAC compliant item that meets the limiting dimensions. Submissions with marginal increases in dimensions to accommodate the IAC classification may also be considered provided such padmounted substations can be retrofitted to the existing network. Acceptance of the increase in dimensions will be at the Purchaser's discretion. Drawing No’s.A3 889824-01 and A3 889831-01 detail the dimensional limitations for the required cubicle enclosures and the plinths. The cubicle height from the base of the plinth shall be 1830 mm. The Purchaser requires that all transformer ratings be accommodated within the cubicle shown on the above drawings (refer Clause 5.1.2.3). Doors, including hinges and swing requirements are shown on Drawing A3 889824-01 and A3 892291-01. The Purchaser has adopted a standard substation envelope which enables substations of different ratings and of different manufacture to be interchangeable. To facilitate interchangeability of substations the Purchaser shall provide locations of HV and LV cable terminals and it is required that NO modifications shall be necessary to allow interchangeability between units to be manufactured on this contract. Drawing No A3 889843-01 shows general details of a typical transformer previously utilised in the substation.




The transformer shall be able to be removed from the cubicle enclosure without disturbing the HV switchgear, LV switchboard or the attached underground cabling to the switchgear, by lifting it vertically upwards. To facilitate removal of the transformer, the cables connecting the transformer terminals to the HV switchgear shall be capable of being easily disconnected either at the transformer terminals or at the switchgear, depending upon the type of switchgear provided. In either case, it shall be possible to disconnect those cables and remove the transformer without disturbing the ring feed supply through the ring main unit of items fitted with a ring main unit. The Purchaser also requires that the transformer can be removed with as little as possible disturbance to the cubicle. The HV switchgear (where required) and LV switchboards are to be supplied and fitted by the Supplier and the requirements are further detailed in the specification. The spacing of all adjacent parts shall allow reasonable room for their installation/removal, proper inspection, cleaning, painting and operation in service. All bolts (fasteners, etc.) and nuts shall be to Australian Metric Standards. Hot dip galvanised bolts and nuts complete with stainless steel washers under the nut and bolt head shall be used to secure the transformer tank lid, where a bolted lid design is used. All other bolts, nuts and washers shall be stainless steel with the bolts and nuts being of different grades, i.e. 304/316 to assist in preventing binding. "Never seez" or equivalent shall be applied to the threads of all stainless steel bolts. Bolts shall be hexagon head (unless this is impractical and alternative is approved by the Purchaser). The bearing surface of all bolt heads and nuts shall be parallel to the surface onto which they tighten. Where necessary, angled washers shall be provided to meet this requirement. If the Tenderer prefers to use non-stainless steel fasteners (e.g. brass) at non critical points (e.g. door handle), their use would be subject to approval by the Supervising Officer for the contract before acceptance. An exception is also allowed for the cable termination hardware for the LV fuse switch.

5.2 Cubicle 5.2.1 General

The cubicle shall be of aesthetic design, robust, weatherproof, rodent and bird-proof and shall have all exterior surfaces finished flush and free from protrusions of any kind except hinges and lifting lugs. Cubicles shall be manufactured from marine grade aluminium MF 502H32 or equivalent material. A grade 304 stainless steel would be an acceptable alternative. The thickness of the sheet metal used in the construction shall be indicated in the Schedule B attached. Cubicles shall be securely held down to the plinth. For a reinforced concrete plinth stainless steel M12 inserts shall be located in the plinth to allow the cubicle to be bolted securely via its internal return edge to the plinth. Access to the bolts shall be possible in the event of the need to change a cubicle in the field. Drawing No’s A3 889824-01, 889831-01 detail the critical parameters in cubicle dimensions to facilitate interchangeability of units. The radiators of the transformer shall not constitute an external surface which is accessible to the public. Where a cubicle over the transformer is not provided, separate covers shall be provided over the radiators which shall be capable of being removed in confined spaces (600 mm clearance) for purposes of inspection, painting, repairs, etc. All pop rivets used shall be made from "Monel" or stainless steel.




All hinges shall be manufactured from Grade 316 stainless steel and shall have a minimum hinge pin diameter of 10 mm. Air ducts shall be provided in that part of the cubicle covering the radiators of the transformer. Such ducts shall have a degree of protection IP1X in accordance with AS 60529. All cubicle seams (e.g. door returns, door stay location brackets, etc.) shall be fully seam welded, where practical and deemed necessary by the Purchaser. Both HV and LV compartments shall be provided with strip heaters of at least 100 watts to prevent condensation or moisture inside the switchgear compartments. The position of the heaters shall be so arranged that the heat from the heaters will not damage any plastic insulation.

5.2.2 Accumulation of Water All surfaces (covers, etc.) shall be sloped to prevent accumulation of water. Condensation within the substation shall be prevented from dripping on the Switchgear.

5.2.3 Earthing and Access to Live Parts All metalwork including panels, doors and lid shall be electrically bonded to permit earthing. If a part cannot be adequately bonded, it shall be constructed from a suitable insulating material. The cubicle shall be solidly bonded to the substation earth bar and connections shall be easily accessible from the doors. Padmounted substations shall be fitted with a common HV/LV earthing system to comply with AS 3000, Section 5. Connections of HV and LV earths to the common HV/LV substation earth bar shall be made so that each connection may be disconnected without interference to the other to enable HV and LV to be separately earthed if required. The substation earth bar shall be flat copper 40 x 4mm. The substation earth bar shall be installed from the HV compartment into the LV compartment. 4x13mm diameter and 1x11mm diameter holes shall be provided each end of each bar. The substation earth bar shall be located to allow ease of connection and disconnection of lugged earth cables and also to clear other equipment. The earth bar of the LV switchboard shall be connected to the substation earth bar. The space between holes shall be adequate to allow spanners, etc. to be used with all cables connected. The earth straps to doors shall allow the door to open 180º. All earth straps shall have a minimum cross-sectional area of 40mm² Copper conductor. The design of the substation shall be such that it is not possible to contact energised parts through air vents or other openings using pieces of wire or other means. A degree of protection of at least IP46 in accordance with AS 60529 is required for the HV and LV compartments.

5.2.4 Doors and Lids Operating doorways and removable panels to the HV and LV compartments shall be in accordance with Drawing Nos. A3 889824-01 and A3 892291-01 and shall come complete with door stay brackets.




Doors shall be fully recessed into and sit flush with the cubicle panel mullions. They shall have a return edge, not less than 24 mm, for adequate strength and stiffness. It shall not be possible to pry open the doors by inserting a screw driver or similar object and gain unauthorised access to the switchgear compartments. Thickness of the door panels shall be stated in the Attachment 2. All doors shall be fitted with 3 point locking suitable for the Purchaser’s approved padlocks having a shackle diameter of 8.7mm. The locking points and pad-lock shall not bear on a painted surface of the door or frame in such a way that paint will be removed thereby causing corrosion. Where double doors exist, single 3 point locking to secure the 2 leaves is acceptable in conjunction with the necessary additional door hardware and stiffening. The successful Tenderer shall provide a temporary means to ensure doors remain locked closed during transport and associated handling. The means adopted shall be acceptable to the Purchaser. A robust door restraint shall be provided to hold each door in the open position shown in applicable drawings. The restraint shall be of a captive design so that it cannot be easily removed and shall be self storing when the door is closed such that it cannot rattle. With the door in this position, operation of the HV switchgear shall be possible without endangering operators hands, etc. The cubicle lid shall be provided with two lifting lugs with 25 mm dia. holes to facilitate handling during delivery and installation. The underside of the cubicle lid over the switchgear compartments shall be lined with a suitable thermal insulation to prevent moisture condensation. The cubicle lid shall be secured to the cubicle by a fixing arrangement that allows ease of lid removal and replacement. The fixing arrangement shall be permanently attached to the cubicle/lid and shall not be able to be moved. The lid of the substation shall be split to provide access to the HV switchgear (if installed) for all operational, testing and maintenance purposes. The section over the HV switchgear shall be a hinged arrangement, complete with a suitable lid stay. Any props required to hold hinged lids or covers in the open position shall be designed such that they lock automatically in the open position to prevent the lid or cover from accidentally falling shut. The prop shall be designed such that conscious effort is required to unlock the mechanism. Full details of the proposed arrangement shall be provided by the Tenderer. Any such props shall not impede access for testing, etc. Any holding down brackets for split sections of the lid required for HV switchgear access shall be fully welded in place. If hold down bolts are used with such brackets then they shall be fitted with captive washers/wing nuts (or similar captive device) to provide ease of access (and ensure loose components cannot be lost at site). If the operating handles for the HV switchgear (if installed) cannot be mounted in a suitable location on the switchgear itself, then a suitable frame complete with cushioning (to prevent noise from vibrations, etc.) shall be provided on the HV door. Labels identifying the operating handles shall be fitted if deemed necessary by the Purchaser.




5.3 Plinth 5.3.1 Total Mass

The plinth upon which each cubicle and transformer is mounted shall be capable of carrying the total mass of cubicle, transformer, HV and LV switchgear. The substations are supported on a concrete masonry wall foundation arrangement as shown on Drawing No A3 889824-01.

5.3.2 Manufacturing The substation base (plinth) shall be manufactured from steel structural sections and hot dip galvanized after manufacture. The substation complete with transformer, HV and LV switchgear, must be capable of being lifted by the base. The method of lifting the complete substation shall be illustrated with drawings and photographs as appropriate in the tender submission. Details of any special lifting equipment required shall also be provided. The two sizes of plinths shall conform to the external dimensional requirement of Drawing No.A3 889824-01. Full details of the proposed plinth and substation base including an Engineer’s certificate for the design shall be enclosed with the tender.

5.3.3 Removable Sections in Substation Base Removable sections as detailed in relevant drawings shall be provided for cabling purposes. These shall fit tightly and bolt into the plinth base so as to provide protection against the entry of solid foreign objects greater than 1mm thickness. Removable sections shall be bolted in place flush with the outside of the base. The weight of each removable section shall be a maximum of 15 kg and adequate strength shall be maintained. Each section shall also be so designed that:

• That extra packing is not required to prevent entry of solid foreign objects. • When fitted, it does not extend above the top of the substation base. • That access for cabling-up purposes is not impeded by a narrow opening. The

Purchaser requires removable sections as indicated on the relevant drawing. • Any bottom lintel and mullion associated with doorways must be removable.

Details of proposal should be forwarded with the tender for appraisal, and would be subject to the Purchaser's approval. Any variations in design during prototype inspection would be to the Tenderer's cost. Details are to be attached with the tender submission.

5.4 Loading of Transformers The transformers shall be suitable for loading in accordance with AS 2374.7. No part of the substation (for example; bushings, tapping switch, leads, switchgear or enclosure) will impose restrictions on the loading capabilities. Details of any limitations to loading above 'normal cyclic' are to be stated in the tender submission.

5.5 Transformer Minimum Energy Performance Levels All transformers must meet or exceed the minimum power efficiency levels specified in Table 1 of AS 2374.1.2 - 2003 Minimum Energy Performance Standard (MEPS).




Transformers with efficiencies not meeting or improving performance upon these MEPS levels are unacceptable. During the term of the Contract, the Purchaser reserves the right to negotiate with the Supplier to enhance the transformer power efficiency levels to meet any future amendments to the MEPS requirement of AS2374.1.2.

5.6 Transformer Winding Connections All transformers shall have electrically separate high voltage and low voltage windings. Winding connections shall be in accordance with AS 60076.1 and shall conform to vector group Dyn11.

5.7 Transformer Tapping Arrangements Each transformer shall be capable of off-circuit tap changing by means of an externally operated switch. The tapping switch shall be located near the top of the transformer for ease of access and to readily facilitate untanking of the transformer. The tapping switch shall be positioned within the LV compartment at a convenient height and shall be able to be operated by an operator standing outside the side door of the LV compartment. Seven tappings shall be provided on the high voltage winding. The principal tapping shall correspond to rated voltage. The tapping range for each applicable rating shall be as detailed in Attachment 1 - Specific Requirements with step voltages of 2.5%. The tapping selector switch shall be capable of being locked in to each of the seven positions. The locking arrangement shall be such that it is not possible to lock the switch between taps. A seven position tap switch shall be provided. However, if a tap selector switch with more than seven positions (via extra undefined positions) is used, it shall be provided with stop pins (or similar) to prevent tap rotation into non-tap positions. Stop pins shall be of the permanently fixed type i.e. bolts, etc. shall not be used. Each tapping selector switch position shall be identified by a number clearly and indelibly stamped onto either the switch operating handle or the transformer tank. Tap position No. 1 shall correspond to the full winding in circuit. The tap position selector switch shall be manufactured in such a way that it may be assembled only in the correct manner, not 180º out of adjustment. This shall be done so no inadvertent open or short circuit can occur due to incorrect assembly following out of tank repair/inspection. A sealing gland shall be provided on the tapping selector switch operating shaft where it passes through the transformer tank to prevent any breathing or leaking along the shaft.

5.8 Sound Level The design and construction of each padmounted substation shall be such that the sound level of the transformer enclosed in the cubicle, measured in accordance with AS/NZS 60076.10, shall be no greater than the ‘standard limit' as per figure A1 - Sound power levels, in Annexure ZA.




5.9 Impedance Voltage Of The Transformer The impedance voltage at rated current on principal tapping shall be as specified in Attachment 1 - Specific Requirements.

5.10 Cooling Of The Transformer The method of cooling each transformer shall be ONAN. Each transformer shall be supplied with standard mineral insulating oil that meets the requirements of AS 1767. The oil shall be new, supplied direct from the oil refinery and its bulk delivery shall be certified to contain less than 1 ppm of PCBs. The Supplier shall follow approved quality procedures to ensure that the oil cannot be contaminated while under their control. The Tenderer shall supply full identification of the oil offered. Details of the oil offered are to be stated in the tender submission.

5.11 Drying Out And Oil Filling Of The Transformer Before Delivery The transformers shall be thoroughly dried out at the manufacturer's works and shall be delivered filled with oil to the correct level and ready for service. All transformers shall be vacuum filled. The degree of vacuum applied to the production units shall be identical to that applied to the units which are type tested. The moisture content of the oil shall be less than 25 ppm at time of filling.

5.12 Radio And Television Interference The design and construction of each padmounted substation shall be such that it will not cause unacceptable radio or television interference.

5.13 Transformer Hv Terminals The position of the HV terminals shall be in accordance with the requirements of Drawing No. A3 889843-01. Transformers shall be provided with bushing wells and bushing plug inserts (Elastimold catalogue K1601 PC-S1 / K1501A1 or equivalent) suitable for connecting the incoming transformer cables using Elastimold non-load break elbows type 156LR-WX. Non-load break elbows are not required to be provided with padmounted substations supplied without HV switchgear. The taught string metal to metal clearance of the bushing external terminals shall not be less than 330mm phase to phase and 280mm phase to earth. A cable cleat bar manufactured from P3300x200 long 'Unistrut' or equivalent shall be fitted to the transformer tank of all items not having HV switchgear fitted and positioned appropriately to support the incoming cable.

5.14 Transformer Lv Terminals The transformer LV phase terminals shall be mounted such that Electric and Magnetic Fields (EMF) associated with the equipment are minimised. The terminal palms shall be in a vertical configuration. The terminals shall be spaced to allow a bushing mounted current transformer to be fitted to each phase. With current transformers fitted over the bushings, it is required that there shall be a clear space between current transformers of 45 (+20, -5) mm. That part of the bushing within the tank shall be readily accessible with the tank cover removed.




The LV bushings shall be designed and manufactured taking into account the specified transformer ratings and environmental conditions. Suitable allowance shall be made for the overload duty of the transformers. Bushing stems, nuts and washers made of steel are unacceptable. For all transformer, the terminal palm shall be drilled with 16mm for 1 hole palms and 13mmfor 2 hole palms. The minimum external taut string metal to metal clearances shall be 100mm phase to phase and 60 mm phase to earth. The LV bushings shall comply with the relevant requirements of AS 1265. All porcelain components shall be glazed in a silver grey colour N42 to AS 2700 and fully vitrified. The part of each LV bushing within the tank shall be completely covered with oil when the transformer is cold with an outside temperature of 15°C. The neutral on the LV side of the transformer shall be brought out unearthed and insulated in a similar manner to the phase terminals.

5.15 Transformer Construction 5.15.1 General

The transformers shall be of robust construction and shall be capable of being transported, installed, removed or dismantled for repair by accepted methods without damage. The capability of being transported must be interpreted in Australian context regarding the distances and state of the roads. Transformers shall be of the sealed tank construction type. Sealed transformers shall be in accordance with AS 60076.1, Clause 8.2, but not pressurised, nor incorporate gases other than air. Diaphragm sealing is not acceptable.

5.15.2 Core and Windings Tenderers may offer transformers with either copper of aluminium windings. HV connection to the tapping switch shall be by means of bolted or crimped connections. Spade type connectors are not acceptable. The core and winding assembly shall be supported by the main tank and not by the cover. Means shall be provided at both the top and bottom of the core and coil assembly for locating the transformer core centrally in the tank and securing it in position to prevent movement particularly during transport. The core and all metalwork shall be electrically bonded to the tank. The bonding of 3 phase core/cores shall be brought to one point only.

5.15.3 Tanks and Lids All surfaces shall be sloped to prevent the accumulation of water. On the external areas of the tank, welding of horizontal and vertical joints shall be on both sides of the joint. Welding in all cases shall be continuous. All seams shall be electrically welded and they shall be oil tight.




All metal work shall be electrically bonded to the tank to permit earthing by the Purchaser. If a part cannot be adequately bonded it shall be constructed from a suitable insulating material instead of metal. The tanks shall be so designed that with a top oil temperature of 105°C, the oil level in the tank will be below the tank lid flange. The tanks shall be designed to withstand without permanent distortion at least the internal pressure due to maximum permissible overload. This pressure may be calculated from temperature/ volume change of expansion space while neglecting flexing of walls or it may be established experimentally, at Contractor's preference. The tank lids shall, be capable of supporting up to 100 kg of a person's weight without permanent deformation. The cover of each tank shall be bolted or clamped using suitable gaskets and surfaces to achieve a seal which prevents moisture ingress, oil leaks and the exchange of air between the inside of the tank and the external atmosphere.

5.15.4 Joints and Gaskets All joints shall be oil tight. Holes shall not be punched through dovetail joints in gaskets. Gaskets shall be manufactured from synthetic rubber or a synthetic and cork composition which is resistant to both corona discharge and transformer oil (including additives if applicable). Gaskets exposed to UV radiation shall be UV stabilised oil resisting synthetic rubber or a synthetic rubber and cork composition. All gasket seals should last the intended life of the transformer. Further to Clause 5.15.3.7 of the specification, the use of inverted U-shaped gaskets is unacceptable for this application.

5.15.5 Oil Containment An oil containment bund is required. A hot dipped galvanized steel bund shall be provided to contain any oil loss from the transformer within the substation cubicle. The bund shall be of sufficient size to contain the total transformer oil capacity plus 10%, and a 32 nominal size threaded drainage outlet complete with galvanized plug shall be provided. The outlet shall be accessible through a substation cubicle door and be located so that access to it is not unreasonably obstructed. Rainwater shall not enter the bund.

5.16 Transformer Fittings Transformers shall be supplied with fittings as detailed below:

5.16.1 Rating and Terminal Marking Plates Rating and Terminal Marking Plates The rating/terminal marking plates shall be in accordance with Clause 7 and Appendix ZB of AS60076.1and shall include a Voltage Vector Diagram. In addition it shall state:

• That the transformer is 'sealed' • Temperature rises (even though normal values apply) • Type of insulating oil (even though it is mineral oil) • Impedance on principal tap only • Statement that the transformer complies with AS2374.1.2 • Total mass and the separate masses of transformer, cubicle, plinth, switchgear and

"untanking mass".




All quantities on the rating and terminal marking plates shall be stated in metric units. The Contract No. shall be shown on the plate or on a separate tag permanently attached in close proximity to rating/terminal marking plate. The rating and terminal marking plates shall be located on the side of the transformer near the tapping switch in a position that can be easily and safely read when the padmounted substation is in service. The rating and diagram plates shall be manufactured from either brass, brass alloy or stainless steel with the lettering etched or otherwise formed in relief and coloured black (except for values which vary from nameplate to nameplate) such that the lettering is in sharp contrast with the background. The terminal marking plate shall show a diagram of windings and internal connections, a legend (where applicable) stating which tappings are connected at each of the seven tapping selector switch positions as well as a voltage vector diagram.

5.16.2 Lifting and Transport Facilities Provision shall be made to lift the padmounted substation complete with HV and LV switchgear by its base utilising the Purchaser’s existing lifting beam arrangement. Two 30mm diameter lifting/hold down pins that project 50mm outside the galvanized base are required each side of the substation. Provide 1 X 13mm diameter hole vertically through each pin 15mm from the outside face to hole centre. Chamfer end of pins 2mm X 450. Pins shall be located generally as shown on drawing A3-889831-01. The final arrangement is subject to agreement by the Purchaser. Additionally the Purchaser prefers the padmounted substations to be moved safely using a forklift via the padmounted substation plinth. If this is deemed possible Tenderers are required to nominate the minimum rating / SWL / type of the forklift to be used and provide training / documentation for carrying out this work. Such additional lifting points in the plinth to facilitate forklifting of the substations and the centre of gravity shall be clearly marked on the plinth, including any safety markings on the plinth to advise of safe forklift to be used e.g. ">=5T {forklift symbol} only" or similar. All parts of the transformer which must be removed for inspection or repair shall be fitted with lifting facilities suitable for use with slings and shackles. For the main tank cover, at least two Grade 304 stainless steel lifting lugs with M24 holes (minimum) shall be provided. The total mass of the substation shall be stencilled permanently in black letters 50mm high and located adjacent to the lifting/hold down pins.

5.16.3 Oil Level Indicator - LV Compartment A clear glass oil level indicator is required on all transformers and shall be of the flush type and fitted to a perfectly flat surface. It shall be of sufficient length to show the oil level over the designed operating temperature range of the transformer. The correct oil level at 15°C shall be clearly and indelibly marked on the gauge. A rigid metal frame shall surround and adequately support the glass and gasket so as to prevent oil leaks. Gauges using material other than glass shall not be accepted unless the Tenderer can demonstrate that they will not be cracked, blurred or distorted by aging over a 25 year period. The oil level indicator shall be positioned to allow easy inspection, with LV switchgear fitted.

5.16.4 Thermometer Pocket A thermometer pocket is not required.




5.16.5 Oil Draining

An oil drain valve is required on 1000kVA transformers only. The drain valve shall have a 25 mm BSP internal thread fitted with a flanged plug and shall be of the metallic sealing gate type. The valve shall be positioned so that all sludge and thick oil can be drained from the bottom of the tank and that clear access is provided to operate the valve. The drain valve shall be located in a position easily accessible through an open door. The actual valve location shall be to the satisfaction of the Purchaser.

5.16.6 Filler Cap Transformers shall be fitted with a filler cap on the transformer within the cubicle LV end/side as near as possible to the edge of the transformer, such that a pipe for draining oil can be inserted to the bottom of the tank and if moisture enters it would drop to the bottom of the tank, Gaskets or thread sealing shall be used to prevent water drops being inhaled into the transformer. Transformer Earthing Connections Two 70mm2 earth cable connections are required from the transformer tank to the substation earth bar. A lug shall be provided at each corner of the transformer tank, suitable for connection to the 70mm2 cable. M12 stainless steel bolts, nuts and washers shall be used for connections to both the transformer tank and the substation earth bar. Connections shall be accessible from the HV and LV compartment doors.

5.16.7 Cubicle and Transformer Markings In the upper left hand corner of the fixed panel beside the side door of the LV compartment, the transformer capacity and the Purchaser's number shall be stencilled. Each numeral/letter shall be 75 mm high and have a body width of not less than 12 mm.

5.16.8 Marking of Transformer Terminals The appropriate designating letter assigned to the windings and tappings in accordance with AS 60076.1 shall be permanently marked on the tank adjacent to the respective terminals. The use of adhesives to attach marking plates will not be accepted. The markings shall be accompanied by stencilled letters on the tank adjacent to the stamped letters. Each letter shall be black, 30 mm high and have a body width of not less than 6 mm.

5.17 High Voltage Switchgear 5.17.1 General

Each padmounted substation is to be equipped with switchgear (where nominated) which will be used to control feeders and to control and protect the transformer in a ring main or radial feeder system. The switchgear shall be rated in accordance with the recommendations for a system rated voltage of 24 kV contained in Section 4 of AS 2650, Table 1. The impulse voltage withstand shall be 125 kV peak to earth and between poles, and 145 kV peak across the isolating distance.




The switchgear shall be capable of withstanding a short-time current of not less than 20 kA for 3 sec and shall have a rated peak withstand current of not less than 50 kA. The front panel of each switch unit shall incorporate mimic display of the switching arrangement with clear signs to ensure a high level of safety in operation. The mimic earth display shall be green. Facilities for voltage indication and phasing out checks shall be provided on each switch unit. The switchgear shall be ergonomically operator friendly so that operator can not be injured during normal operating procedure. Operations shall be carried out using a removable operating handle. It is essential that a means be provided to ensure that the switch cannot be inadvertently connected to any position (i.e. “ON”, “OFF” or “EARTH”) other than that intended by the operator. An adequate mechanical interlock system shall be provided to prevent mal-operation. The switchgear shall include padlocking facilities so that the feeder switches and switch fuses may be locked in each of the "ON", "OFF" or "EARTH" positions. The minimum diameter holes for padlocking shall be 10 mm and it shall be positioned such that the shank of the padlock can be easily inserted into the hole. The HV switchgear shall be suitably earthed to the main transformer tank. Provision shall be made within the switchgear to separately earth the cable screen of each core of the 3 X single core feeder cable. It shall be possible to earth each cable screen from the front of the switchgear. One M12 clearance hole shall be provided for each cable screen at the earth connection point. It shall be possible to disconnect one cable screen without disturbing another cable screen. The HV switchgear shall be free standing and not supported by the transformer tank. Lifting lugs, suitable for fitting with shackles, shall be provided for lifting purposes. A switchgear stand shall be supplied to provide additional height above plinth for terminating cables to switchgear bushings. The switchgear stand shall be hot dipped galvanised to AS 4680 (or equivalent acceptable to the Purchaser) due to the corrosive environment in this area. Clear, unrestricted access to switchgear shall be provided for operational and maintenance purposes. Door mullions shall not impede operation of the switchgear. The amount of force required to perform the operations shall be minimised as much as possible, and shall be not more than 15 kg force in a particular direction. The operating handle(s) shall be mounted in a suitable location on the switchgear itself or in a suitable frame compartment with cushioning on the HV door.

5.17.2 Cable Termination Area - General The termination of cables shall be facilitated by provision of conically shaped bushings (preferably to DIN47636 or equivalent) enabling the use of dead break plug in and disconnectable (fixed by screws/bolts) elbow connectors. The cable sealing end arrangement on the fused tee off circuit may also be in the form of a slip on termination kit within a track proof fuse encapsulated plug in connector system. It is essential that the cable terminating arrangement on all circuits provide for a fully insulated design, with no exposed live parts. The supplier shall specify the make and type of cable terminating kits available and which are suitable for use with the equipment. Cabling facilities on the switchgear shall be suitable for terminating the following cables:




• Switch disconnector units • 1 core AL XLPE insulated HDPE sheathed 12.7/22 (24)kV cable up to 630mm2 • Fuse switch units • 1 core 35mm2 AL XLPE insulated PVC or HDPE sheathed 12.7/22(24)kV cable

Minimum air clearance to earth from all high voltage parts of the switchgear shall not be less than that specified in Table 9.1 of AS2067. Cable boxes shall be suitable for vertical bottom entry. Removable metal cable box access covers (fitted with handles - if difficult to fit/heavy) shall be provided and shall be fastened using stainless steel studs, nuts and washers. The cable boxes shall be designed and constructed so as to minimise the dangers of fragmentation of the box in the event of an internal electrical failure. With cable box access covers and additional barriers fitted (if necessary), a degree of protection IP20 shall be provided for personnel opening cubicle doors (and hinged lid) in the HV compartment. The removable cable box covers shall preferably not be interchangeable with other covers on the same switchgear so as to avoid covers with labels attached being positioned in the wrong place. The cable box entry shall be designed so that it is not necessary to thread the cable into the box. A length of S1000 FSS Supa Strut or equivalent shall be provided at plinth level (top of support level with top of plinth) to provide HV cable support. Sufficient clearance shall be allowed between the inside edge of the plinth and centre line of the cable termination bushings to allow insertion of cable clamps.

5.17.3 Transformer Cable Connections For all items supplied with HV switchgear, 35mm2 HV connecting cables, complete with suitable fittings shall be provided and fitted between the tee off fuse assembly and transformer by the Supplier. The cable shall not be allowed to protrude below the top of the plinth and shall pass over the top of any feeder cable support brackets. The cables shall be screened, with the provision of an earthing lug at the switchgear end. The screen shall be capable of carrying a minimum fault level of 3 kA for 0.2 seconds.

5.17.4 Insulating Medium 5.17.4.1 General

The switchgear shall be of the SF6 or vacuum type. Oil immersed or air or epoxy insulated switchgear will not be considered.

5.17.4.2 SF6 a) The SF6 used shall comply with the requirements of IEC Publication

No. 376 and the latest amendment thereto and shall be identified as such.

b) Static filters shall be mounted inside the SF6 filled chambers for

absorbing moisture and arc products.




c) The switchgear and busbar housing containing SF6 gas shall be sealed for life.

d) The annual loss rate of SF6 shall not exceed 1.0% for each individual

SF6 containing vessel. Any departure from this requirement shall be clearly stated in the tender submission.

e) A robust pressure gauge shall be provided to monitor the SF6

pressure inside the switchgear chamber. The gauge shall be readily visible from the front of the unit without the necessity to remove any covers. The gauge shall be clearly marked to indicate the normal gas pressure, preferably a green area on the gauge face and the low gas pressure preferably by a red area on the gauge face.

f) It is preferred that the SF6 switchgear be designed to prevent

operation of the switchgear if SF6 pressure falls below the level where any switching operations cannot be performed safely. If this requirement cannot be met the Tenderer shall indicate with the tender, the recommended operational procedures to ensure operator safety. Procedures are to be attached to the tender submission.

g) The switchgear chamber shall be designed to withstand the pressure

due to an internal arc supplied by a current equal to the rated short circuit current of the equipment for one second. For any abnormal pressure rises above this, the switchgear chamber shall be provided with a pressure relief vent located at the rear of the equipment to direct the exhaust products so released away from the front without causing any danger to the operating personnel.

h) Documentary evidence shall be included in the tender

submission to demonstrate that the Tenderer's manufacturing facility employs "best practice" SF6 handling procedures.

i) The successful Tenderer shall undertake to recover and recycle the

SF6 gas remaining in the switchgear and dispose of toxic by -products within the SF6 chamber along with the other parts of the equipment in an environmentally responsible manner at the end of their service life.

(i) Statutory Requirements for Unfired Pressure Vessels

Plant design registration - The Tenderer shall ensure compliance with the requirements of the Division of Workplace Health & Safety legislation, as prescribed by the Queensland Government, for the registration of plant designs as unfired pressure vessels, and AS1200. The Tenderer's attention is drawn to the following web site, and Division of Workplace Health & Safety contact details: www.whs.qld.gov.au/form/form14s.pdf The Technology Unit, Division of Workplace Health & Safety




Department of Industrial Relations + 61 7 3872 0584 PO Box 820, LUTWYCHE QLD 4030 The Division of Workplace Health & Safety shall register those pressure vessel designs requiring plant design registration. Plant design registration shall be supplied before dispatch of the vessels to Ergon Energy.

5.17.4.3 Vacuum

Switchgear with vacuum insulation will be considered provided the equipment offered meets the technical performance requirements and full details are provided with the offer.

5.17.5 Fuses for HV Switchgear Fuses complying with AS1033 Part 2 shall be used to protect transformers rated up to 1000kVA. The transformers may be loaded continuously to 125% of the full load rating. The Purchaser will supply the fuses. Provision shall be made to ensure fuses are correctly installed. The fuses shall be capable of withstanding magnetising inrush currents up to 12 times the transformer full load current for 0.1 seconds and 25 times the transformers rated full load current for 0.01 seconds. Details of make of 'full range' fuses suitable for use with the switchgear offered shall be supplied with the tender document. The Tenderer shall state whether the recommended fuses have been tested on the switchgear offered. The Tenderer shall state in the tender response the effect on fuse operation/characteristics due to operation at elevated ambient temperatures. Circuit breakers combined with transformer protection relays may be offered instead of switch fuse units.

5.17.6 Switch Disconnector The switch disconnector shall be used on ring feed circuits. Refer Clause 5.17.1 for the general requirements and Clause 5.17.2 for cable box requirements. The rated parameters and the required performance appear in the Attachment 1. The switch shall be provided with:

• Integral fault make earth switch. • Clearly marked operating positions indicating “ON” and “OFF” for both isolation

switch and earth switch. • Fully interlocked access for earthing and testing of cables. Accessing the enclosure

shall not be possible before the opening of the isolator switch and the closing of the earth switch and vice versa. Also refer Clause 5.17.8 for earthing requirements.

• An enclosure or compartment suitable for the intended termination types and intended cables.

• Cable terminals suitable for the use of aluminium/copper lugs. • Integrated short circuit indicators (indicating on each phase) of the Alpha E type

(automatic reset) manufactured by Horstmann or equivalent.




• All necessary cleats or clamps for securing cables within the termination compartment.

• One (1) blank circuit identification label for each switch disconnector.

The switch disconnector shall be able to be automated for possible remote operation in the future. The tenderers are requested to submit details of equipment modifications required and the additional components needed to be retrofitted to achieve remote operation capability. Details are to be attached to the tender submission. Refer Clause 15.17.9 for the cable testing facilities required.

5.17.7 Fuse-Switch Tee-off Assembly The unit shall be used to control supply to and protect distribution transformers up to 1000 kVA capacity. The rated parameters and the required performance appear in the Attachment 1. Refer Clause 15.17.9 for the cable testing facilities required. Accessing the enclosure shall not be possible before the opening of the isolator switch and the closing of the earth switch and vice versa. Refer Clause 5.17.8 for the earthing requirements. Refer Clause 5.17.1 for the general requirements and Clause 5.17.2 for cable box requirements. Fuse switch shall incorporate a double break arrangement for the switch contacts where the fuse carrier is not withdrawable, i.e. one break on each side of the fuse. Where the fuse carrier is withdrawn from the busbars for fuse replacement a single break arrangement will be acceptable. Removal of the fuses shall only be possible when the fuses are physically isolated from bus and cable side conductors, and earthed, i.e. when access to any live part is not possible. The switch fuse shall be so interlocked that it is not possible to operate the switch unless the fuse access cover is locked in the closed position. The switch fuse unit shall be triple pole operated and shall be equipped with a fuse actuated three pole tripping mechanism. It shall not be possible to reclose the switch before replacing the blown fuse. Indication shall be provided to show when a fuse link has operated. The Tenderer shall state the maximum heat dissipation allowable inside the fuse holder in the Attachment 2- Guaranteed Particulars Fuse extractors, if required, shall be included in the tender price.

5.17.8 Earthing Requirements Provision shall be made for earthing of incoming cables and the fused tee-off cable. Full fault make earth switches are required. Full details of the earthing system is to be provided in the tender.




Details are to be attached to the tender submission. It shall not be possible to switch, in one operation, directly from the "on" to the "earth" position. The earth switches shall be suitable for full fault making duty and shall satisfy the requirements of AS 62271.102 Alternating current disconnectors and earthing switches. The fault make earth switch associated with each ring switch shall be interlocked with the ring switch such that it is not possible to close the ring switch with the earth switch closed and it is not possible to close the earth switch with the ring switch closed. The fault make earth switch associated with the switch fuse shall be interlocked with the switch fuse such that it is not possible to close the switch fuse with the earth switch closed and it is not possible to close the earth switch with the switch fuse closed. The earth switch associated with the switch fuse shall have a minimum rating of 2 Ka rms for 3 seconds.

5.17.9 Cable Testing Facilities Each feeder switch / switch fuse shall be provided with a capacitive voltage testing device for testing whether the cable associated with the equipment is energised or not, as depicted in the Electrical Schematic Drawings in Attachment 1. The cable-testing device shall be suitable for use with a standard voltage indicator (similar to Fluke 80 series multimeter), and shall be capable of being used for phase sequence and identification testing. The Tenderer shall submit full details of the test device offered with the tender submission.

5.18 Detailed Hv Switchgear Requirements The following HV switchgear combinations shall be supplied under this specification.

5.18.1 No HV Switchgear Items 2, 6, 7, 11 and 12 do not require HV switchgear. The schematic of these items is shown in Attachment 1, Section (B) Electrical Schematic Representation are shown in, Figure 1 and , Figure 2.

5.18.2 Ring Main Switches Items 3, 8, and 13 require the padmounted substations to be supplied with ring main units as detailed below. The ring main unit consists of two feeder switches and one fused switch, as shown in Attachment 1, Section (B) Electrical Schematic Representation, Figure 3 and Figure 4.

5.18.3 Switch Fuse Unit Item 1 requires the padmounted substations to be supplied with switch fuse units as detailed below. The switch fuse unit consists of one feeder switch and one fused circuit connection to the transformer, as shown in Attachment 1 Section (B) Electrical Schematic Representation, Figure 5.




5.18.4 Ring Main Unit with Tee-Off Feeder Switch Items 4, 9 and 14 will be supplied with a ring main unit and an additional tee-off feeder switch as detailed below. The ring main unit with tee-off feeder switch consists of three feeder switches and one fused switch, as shown in Attachment 1, Section (B) Electrical Schematic Representation, Figure 6 and Figure 7.

5.18.5 Ring Main Unit with Tee-Off Fuse Switch Items 5, 10 and 15 will be supplied with a ring main unit and an additional tee-off fuse switch as detailed below. The ring main unit with tee-off fuse switch consists of two feeder switches and two fused switches, as shown in Attachment 1, Section (B) Electrical Schematic Representation, Figure 8 and Figure 9.

5.19 Low Voltage Switchgear 5.19.1 General

All padmounted substations are to be equipped with a low voltage switchboard. The switchboard shall be dead front and be designed such that all installation, maintenance and repair activities can be easily performed without the need to access the rear or approach live parts. The bus system of the low voltage switchboard and the equipment shall have a minimum fault rating of 50kA / 1 sec. The insulated connecting cables between the transformer terminals and the LV switchboard shall be rated to meet the overload capability of the transformer. The connecting cables shall be supplied with hex crimp connectors fitted. The bottom switchboard frame supports which rest on or just above the plinth shall be manufactured from S1000 FSS Supa Strut or equivalent due to the corrosive environment in the area. Switch disconnectors and fuse switches shall be of a vertical configuration mounted on a common busbar system. Standard busbar separation of 185 mm shall be provided. Preference shall be given to fuse switches that are suitable for fitting to the switchboard when energised. A busbar configuration that minimises the associated electrical and magnetic fields will be given preference. The Tenderer shall comment in the tender submission on the EMFs associated with the equipment offered. The current ratings of the switch disconnectors and fuse switches shall be as stated in Attachment 1. Note that 630 A base assemblies (minimum) shall be used with both 400 A and 630 A carriers to allow the Purchaser to uprate circuits without the need to change base assemblies. A 1260A (ganged 2 X 630A) fuse switch shall be used to supply customer loads up to 1200A. The LV switchgear shall be capable of continuously carrying 400A, 630A and 1200A respectively at an ambient temperature of 55°C. Provision shall be made for additional fuse switch assemblies to be mounted on the LV frame of units as stated in Attachment 1. Where only one spare space is available, it shall be located to allow the Purchaser to fit the switch fuse on the LHS of the switchboard when viewed from the front, at a later date. The busbar system shall be predrilled and "nut serts" (or equivalent) shall be fitted to the busbar to allow the Purchaser to mount all existing and




any extra fuse switch(es) in the busbars from the front of the switchboard, without any need to access the rear of the switchboard. Substations rated 1000 kVA shall come complete with a connection arrangement provided for direct mounting of the customer's cables to the consumer mains busbar system. A typical arrangement is shown on Drawing A3 889850-01. Provision shall be made for accepting 3 x 300mm² cables per phase. Full details are to be provided with the Tender submission. The characteristics of the component equipment, constructional and performance requirements, markings and tests shall comply with AS 3947.3. De-rating factors shall be applied to cater for the increased temperatures inside the cubicle of the substation. The electrical contacts of all switch disconnectors shall be of silver plated copper. The silver plating shall be in accordance with AS 1856 to guarantee a service life of 25 years. All silver plated parts are to be guaranteed to be free from verdigris under the specified service conditions. The number and the ratings of the switch disconnectors and the fuse switch disconnectors required for different sizes of padmounted substations are listed elsewhere. The Low Voltage fuse links will be provided by the Purchaser and will be DIN size 2, blade contact type, except 800A which will be DIN size 3, blade contact type. 630 A carriers may use DIN size 3 fuse links but must still be capable of accepting DIN size 2. Only equipment which has a dead front shall be acceptable. Switches shall be provided with the facility for padlocking in the open position. Provision shall be made on the equipment for voltage test points. At these test points it shall be possible to test phase to phase and phase to neutral voltages, and also to perform a phasing out operation, i.e. to check phase rotation and voltages across the open point to be closed by the link. All solid insulating materials used shall be fire resistant. They shall not ignite spontaneously and shall cease to smoulder or melt immediately on removal of the heat source. It is intended that the equipment will be connected to, where required, copper busbar and aluminium cables, and it is essential that the electrical connections be of compatible materials. Tinned aluminium terminals shall not be acceptable. M12 stainless steel nuts, bolts and belleville washers for cable termination shall be supplied with each unit to allow termination of up to two 240 mm² aluminium, 4 core XLPE cables (fitted with 45 mm wide lugs). Drawing Nos A3 889847-01 and A3 889850-01 showing the typical freestanding LV switchboard for substations up to 500kVA and 1000kVA rating have been included as a guide to the form and appearance of the switchboards used as applicable. Note that 2 fuse switches only are required for 200kVA Padmounted Substations as shown in Figures 5. Busbar configurations designed to minimise EMF levels are preferred. An earth bar shall be provided to allow the connection of equipment and cable earths. For this purpose, 3 x 14 mm holes plus 2 x 8 mm holes, all with nut-serts or equivalent, for




auxiliary services board (where required) and CT earth shall be provided. The LV earth bar shall not impede clear cable access to LV terminals (and be mounted preferably at the back of the LV board) and shall not hinder connection of the cable neutral to the neutral bar (preferably by offsetting it the same as the neutral bar). A length of S1000 FSS Supa Strut, or equivalent, shall be provided for low voltage cable support. This area is particularly prone to corrosion. The minimum distance from the top of the cable support to the hole centre of the lowest LV terminal shall be 600 mm. Double insulated wiring shall be used for the LV current transformer wiring and wiring to the auxiliary services board (where required). Earth wires shall be colour coded green/yellow in accordance with AS 3000. A tinned copper neutral bar shall be provided having hole centres at least 255mm above the top of the plinth to allow the connection of the cables (minimum 70mm² for transformers up to and including 500 kV.A and 120 mm² for 1000 kV.A ) between the transformer neutral bushing and neutral bar and between the neutral bar (to be coloured black) and the earth bar (to be coloured green/yellow) as well as the LV feeder cables. Eight (8) x 14 mm holes, plus three (3) x 8mm holes, all with "nut serts" or equivalent shall be provided to allow connection of the cables from the front of the switchboard, similar to the earth bar. Neutral cable connection positions shall be located clear of active load terminals of switchgear. The neutral bar will extend around the left hand side of the switchboard to allow for the connection of large consumer’s mains. Four holes will be provided in the extension. The neutral bar will extend around the right hand side of the switchboard to allow for the connection of LV surge arresters. Three holes will be provided in the extension. To enable the Purchaser to provide separate earthing at the padmounted substation sites when required, allowance shall be made for insulating the Earth bar from the switchgear frame with the use of 2 busbar insulators. A shroud/cover, or similar, shall be provided around the LV switchboard to allow for the attachment of LV feeder destination labels, phasing labels for the LV busbar and protection for personnel from contacting exposed LV equipment. Labels are 35mm wide so the PVC shroud/cover should be at least 50mm wide. The final layout of the LV switchboard shall be safe from a maintenance/operating perspective and as such shall be subject to the Purchaser's approval. All components offered shall be subject to the Purchaser's approval. A suitable conducting grease shall be applied to all electrical connections of the LV switchboard and associated cable connections.

5.19.2 Load Circuit Switches The primary protection for outgoing load circuits connected to the 400A, 630A and 1260A (ganged) three phase switch disconnectors will be overcurrent protection. This will be achieved by the Purchaser fitting fuse links to the switch disconnectors. The Tenderer shall ensure that fuse holders remain closed during transportation prior to the Purchaser fitting the fuse link. For switching of outgoing circuits it is required that the switch disconnector be capable of breaking load up to its normal current rating and also be fault making.




The three phases shall be switched simultaneously, rather than sequentially. Single pole operation will not be accepted. Load circuit switches shall be capable of being fitted or removed with the bus bars energised. Each three phase switch disconnector shall have terminals for terminating up to 2 x 240 mm² aluminium cables per phase and it shall be possible to terminate the cable from the front of the switchgear.

5.19.3 Transformer Switch Disconnector The switch disconnector shall be used for isolating transformers and for paralleling a transformer with a diesel generator (except for items rated 1000 kV.A). The switch disconnector shall be capable of switching off circulating currents while transferring load to the diesel generator. The switch disconnectors shall be capable of making and breaking load currents. The switch disconnector shall preferably switch the three phases simultaneously, rather than sequentially, Single pole operation will not be acceptable. Refer Attachment 1 for rated parameters and performance requirements. The Purchaser may require some 1000kVA padmounted substations to be fitted with circuit breakers in lieu of switch disconnectors.

5.19.4 Insulation Level of Cable Terminations An insulation level of 2500 V rms shall be maintained between phases of each unit and adjacent units when the switch is terminated with uncovered lugs to suit the maximum cable size. The maximum cable lug dimensions are overall length 140 mm, palm width 42 mm, Utilux Type BG4HR240/M12 or equivalent. Insulating barriers of fire resistant material would be acceptable for this purpose.

5.19.5 Accessories The low voltage switchboard shall be fitted with the following accessories. Distribution Transformer Low-voltage (LV) Monitoring Capability Requirements Technical Specification TS-479 LV Transformer Monitoring Capability Requirements for Pad Mount and Dry Type Transformers is the base document for the requirement in lieu of LV Current Transformers and Maximum Demand Indicator system. The Scope of supply for this tender is limited to:

• The supply and installation of the LV Metering CT’s • The supply and installation of the Housing and Fitment – including Voltage takeoff

wiring, fuses and test links. The scope of supply does not include:

• The LV Monitoring Meters • The Communications Equipment • The Antenna

The equipment tendered shall be designed for future site fitting of a Low-voltage monitor / meter for every item Attachment 1 and as detailed in TS-479.




The Purchaser requires minimum accessible space to mount future communications and LV monitoring equipment in addition to the space requirement for the LV meter outlined in TS-479 The additional space requirement approx the size of a Quality of Supply Monitoring Box 540 mm (height) x 270 mm (width) x 180 mm (depth) would be adequate to allow for a Data Concentrator as a possible alternative and or additional future metering equipment requirement. Such possible future enclosure would have an approximate minimum total weight {enclosure and LV Monitor and associated equipment} of 8 kg. Preference is for the unit to be door mounted if possible on the LV compartment door, or Manufacturer nominated location. The mounting must have adequate strength and rigidity to support all present and future component requirements. Any Voltage and current wiring provided must be correctly rated for electrical duty and must be flexible if requiring to cross over moving parts such as the door hinge. The Tenderer shall include in the design the provision for the installation of a future antenna including mounting brackets and fastening points for the antenna cabling.

5.19.6 Auxiliary Services Auxiliary services board shall consist of one standard 240V a.c. fixed general purpose outlet protected by a RCD, neutral link and a heater circuit protected by a RCD. Cables from the busbars to the auxiliary services board shall be 25 mm² minimum and shall be connected from the base of the outgoing circuits (this may necessitate a flag type lug).

5.19.7 Alternator Connection Facility An alternator connection point on each phase busbar and neutral shall be provided to allow connection of the cables of an alternator set. The connection point shall be suitable for use with a lugged connection with an M12 clearance hole or a clamp connection. Tenderers are encouraged to submit an alternative method for connection of an alternator to the LV switchboard. Details are to be included with the Tenderer. Tenderers should note that it should be possible to close and lock the LV end door with the LV switch disconnector and LV fuse switches in the open position.

5.20 Detailed Lv Switchboard Requirements 5.20.1 LV Switchboard for 200, 315 & 500 kVA substations.

The LV distribution switchboard fitted in 200, 315 & 500 kVA Padmounted substations shall comprise of the items listed below. Drawing No A3 889847-01 shows the freestanding LV switchboards supplied under the current contract. Front cable entry type Padmounted substations on drawings A3 889914-01 and A3 889915-01 show LV boards with a transformer disconnector, a 630A and three 400A fuse switches Tenderers are invited to offer their switchboard designs to accommodate items listed below within the LV compartment of the 200/315/500 kVA Padmounted substation.




1 – 1000 Amp (minimum rating) 500 volt triple pole switch disconnector (Weber VER1000 type or equivalent). 1 – Bolted neutral link 1 – Protecting cover as required for switch disconnector which can be inserted in the place of the fuse cover Suggested Metering CT specifications: 3 – 800/5A Class 1.0, 5VA FS10 200% current transformer for 500kVA substations 3 – 800/5A Class 1.0, 5VA FS10 200% current transformer for 315kVA substations 3 – 200/5A Class 2.0, 5VA FS10 200% current transformer for 200kVA substations 6 - Current transformer test links 4 – Voltage test links, each phase circuit protected by and complete with a 6A HRC fuse (6A fuse link to be included) and 20 A fuse bases. For 200kVA, 2 - 3 phase 400A fused circuits are required. For 315kVA and 500kVA, 5 - 3 phase 400A fused circuits are required. Each fused circuit shall include a 500V 630A (minimum) triple pole HRC fuse base assembly complete with a 400A fuse carrier. 1 – General purpose outlet protected by and complete with a RCD. 1 – Heater circuit protected by and complete with a RCD. The switchboard shall be completely assembled with all necessary busbars, earthbars, terminals, cable supports, labels etc. Allowance shall be made for a generator connection point and 1 spare (future) fuse switch position on LV switchboard. Neutral Bar shall be so mounted to enable cabling to 2 x 240mm2 aluminium cables to be laid in, in front of the bar. Neutral cable connection positions shall be located clear of active load terminals of switchgear. The neutral bar will extend around the left hand side of the switchboard to allow for the connection of LV surge arresters. Three holes will be provided in the extension. An ESAA pattern current and voltage test link block with internal bridging link is preferred to be used however if other test links are used for the voltage and current terminals they shall provide equivalent current shorting and voltage open circuit capability and be accessible and protected from inadvertent contact. Wiring of current and voltage test links, G.P.O. and heaters shall be in accordance with attached drawing A3 889853-01 and AS 3000.

5.20.2 LV Switchboard for 1000 kVA Substation The LV distribution switchboard fitted in 1000 kVA Padmounted substations shall comprise of the items listed below. Drawing No A3 889850-01 shows the previously supplied version of the freestanding LV switchboard. Tenderers are invited to offer their switchboard designs to accommodate items listed below within the LV compartment of the 1000kVA Padmounted substation.




1 – 2000 A (Minimum Rating) 500 volt triple pole switch disconnector (Weber VER1000 type or equivalent) 1 – Bolted neutral link 1 – Protecting cover, if required for switch disconnector, which can be inserted in the place of the fuse cover Suggested CT Specification: 3 –1500/5A Class 1.0, 5 VA FS10 200% current transformers. 6 – Current transformer test links 4 – Voltage test links, each phase circuit protected by and complete with a 6 A HRC fuse (6 A HRC fuse link to be included) and 20 A fuse base. 2 – 3 phase 630 A fused circuits. Each fused circuit shall include a 500 V 630A (minimim) triple pole HRC fuse switch disconnector. 1 – 3 phase 1260A fused circuit. The Purchaser intends to use 2 X 800A HRC fuse links in triple pole fuse switch disconnectors to supply customer loads up to 1200A. 1 – General purpose outlet protected by and complete a 10A RCD. 1 – Heater circuit protected by and complete with a 10 A RCD. The switchboard shall be completely assembled with all necessary busbars, earthbars, terminals, cable supports, labels, etc. Allowance shall be made for a generator connection point and 1 spare (future) fuse switch position on LV switchboard. Neutral Bar shall be so mounted to enable cabling to the 2 x 300mm2 aluminium cables per feeder circuit and 3 x 300mm2 aluminium cable at the customer mains circuit. An ESAA pattern current and voltage test link block with internal bridging link is preferred to be used however if other test links are used for the voltage and current terminals they shall provide equivalent current shorting and voltage open circuit capability and be accessible and protected from inadvertent contact. . Wiring of current and voltage test links, max demand ammeter, G.P.O. and heaters shall be in accordance with attached drawing A3 889855-01 and AS 3000.

5.21 Nameplates and Labelling The Purchaser has a standard practice of fitting engraved Gravoply 11 or similar labels to the HV switchgear as shown on Drawing No. 02-02-08 (Note- Phase designation shall be A, B, C). The Operation Isolator Identification, Feeder Identification, Destination Labels and Phase Connection Labels shall be supplied and fitted by the Purchaser in suitable spaces on the switchgear as provided by the Supplier. The sizes of all such labels are detailed in Drawing No. 02-02-08.




Tenderers shall submit for approval a drawing of the equipment showing the proposed locations for the attachment of labels. The preferred method of fixing is by self tapping screws. Tenderers shall comment whether this in any way compromises the electrical or mechanical performance of the switchgear. Details of these labels shall be finalised with the successful Tenderer, to the satisfaction of the Purchaser. A diagram plate which clearly and indelibly shows the schematic diagram of the HV equipment shall be fitted to the front of each unit of HV equipment and shall be clearly visible. A manufacturer's nameplate shall be provided on each unit of HV equipment. Where a particular form of ring main unit has been obtained by the combination of individual separable units, each of the separable units is to be provided with a nameplate. The rating plate shall also incorporate the Contract No (insert contract no). The appropriate HV equipment signs shall be supplied and fitted by the Tenderer as detailed in Drawing No. 02-02-07. All labels shall be made from WB Gravoply II or equivalent with black lettering. Labelling details include:

• Each cable termination on the HV ring main unit and switch fuse unit shall have a phasing label attached (above the removable cable box cover) for identification purposes. Lettering shall be 3mm x 17mm high.

• Each feeder switch, cable box, and access test point related to the relevant switch on the HV switchgear shall be labelled as shown. Lettering shall be 5mm high (minimum). Numbers shall be 25mm high x 3mm wide. Double sided tape shall be used to affix the labels in position on the switchgear.

Similar phasing labels as used on the HV switchgear (except in lower case letters) shall be applied to the PVC shroud/cover (or similar) covering the LV busbars. No additional labelling other than standard manufacturer's markings is required on the terminals of the LV fuse switchgear, however, the configuration of terminals shall be 'a,b,c' from front to back as standard. The LV compartment door of the substation shall have an aluminium disc 30mm diameter, 2 mm thick attached above the danger sign to identify the LV compartment from the outside, as shown in Drawing No's. 22-A3-1124 and A3 889992-01. Along the centre line of each end door and as indicated on the drawing, a "DANGER HIGH VOLTAGE" sign shall be attached as shown on the above drawings (i.e. four danger signs minimum). The signs shall conform to the requirements of Clause 4.2.3 of AS 1319 and Drawing No. 02-02-13. The LV compartment door of the substation shall have a sign in accordance with Drawing No. 02-02-12 fitted the relevant Drawings. The Purchaser shall fit the stick on letters referred to in the drawing when the substation is installed. The outgoing side of fuses mounted on the auxiliary service board shall be labelled 'a, b, c'. A label shall be attached to the meter panel which states the CT ratio, of the installed CTs even though the LV Monitor meter is primary rated.




5.22 Silver Plated Components Silver plating of copper components shall be carried out in accordance with AS 1856 Electroplated coatings - Silver. The minimum thickness of the silver coating shall be 10 micro metres (or microns).

5.23 Protective Coating The Purchaser requires all internal and external surfaces to be treated with a coating which provides protection against corrosion induced by water, salt laden atmosphere and low levels of industrial pollutants. As the estimated service life of the padmounted substation is 35 years, the Purchaser requires a coating system to provide “Long term” durability as defined in Clause 1.6 of AS 2312 for structural steel. Metallic components other than structural steel shall be provided with a coating system having performance equivalent to or superior to that stated above. Finished coatings shall be oil resistant, heat resistant and non-corrosive. The transformers are required to be painted but do not have to be hot dipped galvanised. Exterior coatings shall be suitable for use in an Atmospheric Corrosivity Category E-M environment as defined in Clause 2.3 of AS 2312. The resulting surface coating inside the transformer tank and any oil filled switchgear shall not react with insulating oil. The external surface of substations shall be rivergum G62 to AS 2700. All coatings (except the interior surface of the transformer and HV switchgear) shall be capable of being maintained on-site. The materials used and method of application shall be suitable for the base metal to be coated, shall be supplied by a reputable manufacturer and shall be applied in accordance with the recommendations for this particular application. The Tenderer shall provide evidence supporting the performance of the offered coating under the conditions defined above including details of all tests performed in accordance with AS 1580. Details are to be attached to the tender submission. The successful Tenderer shall provide details on the method of protective coating repair to allow the Purchaser to carry out field maintenance. (Note: Maintenance would not be scheduled for at least ten (10) years.) Details are to be attached to the tender submission.

5.24 Comparison of Tenders Guaranteed load and no-load loss figures are to be specified in Attachment 2 and also relate to any and all corresponding optional and or alternative items. Load losses are to be corrected to a reference temperature of 75°C. In evaluating the tenders, the Purchaser will capitalise the guaranteed losses and so determine the economic advantages of the transformers offered. Capitalisation of losses will be based on the guaranteed losses at the required power rating for each item as stated




in Attachment 2 and also relate to any and all corresponding optional and or alternative items. Load losses will be those specified on the principal tapping. For this contract, the following values will be used for the purpose of making a fair economic comparison: F (No-load loss) = $ 6 300 / kW C (Load loss) = $ 1 800 / kW F and C are the $/kW capitalisation figures for the no-load and load losses respectively. As specified in AS 60076.1, the maximum allowable tolerance for the total losses for all transformers to be supplied under this contract is +10%. For any transformer, the maximum allowable tolerance for either the no-load loss or load loss is +15%, provided that the total loss meets the above requirement of +10%. Where the total loss exceeds the +10 % tolerance or either the no-load loss or load loss exceeds the +15 % tolerance, the Purchaser reserves the right to reject the unit. As an alternative, the unit may be accepted with the application of Liquidated Damages as described in the Liquidated Damages portion of the Standing Order.

5.25 Spare Parts Spare parts which the Tenderer considers to be a reasonable amount of spares to be held by the Purchaser shall be listed in Attachment 3. Each item shall be priced separately. The Purchaser may, at its discretion, order all or any of the spare parts. Any parts ordered shall be interchangeable and suitable for use in place of the corresponding parts supplied with the original equipment. All spare parts shall comply with the specification, shall be suitably marked and/or numbered for identification and suitably prepared for storage.

6. Performance and Testing

6.1 Type Tests on Each Design The following type tests are required on each design and certificates are to be supplied with the tender:

TRANSFORMER AS CLAUSE No. 1. Temperature Rise Test AS 2374.2 Clause 5

The test of temperature rise shall be carried out with the transformer mounted inside the fully assembled closed cubicle.

2. Impulse-Voltage Withstand Test AS/NZS 60076.3 Clause 13 3 Impulse-Voltage Withstand Test including

Chopped Wave Test AS/NZS 60076.3 Clause 14 4. Sound Level Tests AS/NZS 600761.10 5. Short Circuit Tests AS 2374.5 HIGH VOLTAGE SWITCHGEAR AS 62271.200 CLAUSE No. 1. Dielectric Tests 6.2 2. Temperature Rise Tests 6.5 3. Resistance of Main Circuit 6.4 4. Short Time and Peak Withstand 6.6 5. Verification of Making and Breaking Capacities 6.101 6. Mechanical Operation Tests 6.102 7. Verification of the protection 6.7 8. Pressure withstand test for gas-filled compartments 6.103 9. Internal arcing test (classification IAC-A internal arc 20kA 1 second) 6.106




For switchgear incorporating vacuum interrupters and solid dielectric insulation systems, type tests shall be carried out in accordance with AS 62271.201. LOW VOLTAGE SWITCHGEAR AS/NZS 3439.1 CAUSE No 1. Verification of Temperature Rise Limits 8.2.1 2. Verification of Dielectric Properties 8.2.2 3. Verification of the Short Circuit Withstand Test 8.2.3 4. Verification of the Effectiveness of the Protective Circuit 8.2.4 5. Verification of the Clearance and Creepage Distances 8.2.5 6. Verification of the Mechanical Operation 8.2.6 7. Verification of the Degree of Protection 8.2.7

6.2 Routine Tests on Each Padmounted Substation The following tests, as specified in the following standards, or elsewhere in the specification, shall be carried out on applicable components if fitted:

TRANSFORMER AS 60076/AS 2374 CLAUSE No. 1. Measurement of Winding Resistance Part 1 Clause 10.2 2. Ratio and Phase Relationship Checks Part 1 Clause 10.3 3. Impedance Voltage, Short Circuit Impedance and Load Losses Part 1 Clause10.4 4. No-Load Loss and Currents Part 1 Clause 10.5 5. Induced Over-Voltage Withstand Part 3 Clause 12 6. Separate - Source Voltage Withstand Part 3 Clause 11 7. Insulation Resistance Part 3 Clause 16 8. Pressure Test on Sealed Transformers Clause 6.9 of specification HIGH VOLTAGE SWITCHGEAR AS 62271.200 CLAUSE No. 1. Dielectric Tests 7.1 2. Resistance of Main Circuit 7.3 3. Mechanical Operation Tests 7.102 4. Tightness tests 7.4 5 Partial discharge measurement 7.101 LOW VOLTAGE SWITCHGEAR AS 3439.1 CLAUSE No. 1. Inspection of Assembly including Inspection of Wiring and,

if necessary, Electrical Operation Test 8.3.1 2. Dielectric Test 8.3.2 3. Checking of Protective Measures and of the Electrical Continuity of

the Protective Circuits 8.3.3 4. Verification of Insulation Resistance 8.3.4 CURRENT TRANSFORMERS 1. Standard Tests per AS 1675 COMPLETE PADMOUNTED SUBSTATION 1. Transformer HV d.c. resistance with links inserted in place of fuses via ring main cable terminals.

6.3 Prototype Units Type tests shall be performed on a single prototype unit of each transformer rating (for each style if different designs used) which shall be identical to the production units in all respects relating to materials, design and manufacture. As such, Tenderers shall guarantee that the prototype units will not undergo any process or treatment which the remaining transformers purchased on the contract would not undergo. All type testing costs shall be included in the tender prices for the transformers. Additional separate costs for prototype testing shall not be accepted. Where applicable (e.g. temperature rise tests) the prototype units of each rating/style shall be complete units, including a LV switchboard, a HV RMU and cubicle. Tenderers shall advise the period of time required to develop to production stage the prototype unit of each rating, in calendar weeks from initial advice of tender acceptance. The Purchaser shall take into account the periods quoted in the evaluation of the tender. Where units are offered of an identical design to previously type tested units, such type tests will be accepted by the Purchaser. However, if a unit was type tested in a different




tank, a repeat temperature rise and impulse test is required. Tenderers shall provide sufficient evidence to the satisfaction of the Purchaser that previous type tests are applicable to designs offered. The acceptance of previous type test results will be solely at the Purchaser's discretion, based on the evidence supporting the previous type tests conducted.

6.4 Repeat Type Tests As type tests are to be performed on prototype units, any modification required as a result of a type test failure or change of design instigated by the Supplier or change of design to comply with the specification which could affect the results of earlier type tests shall require a repeat of such earlier type tests. Any repeat type tests to provide compliance with the Standard's requirements shall be to the Supplier's cost.

6.5 Temperature Rise Type Test The transformers to undergo the temperature rise test shall be the fully assembled prototype units, including LV and HV switchgear. Extrapolations of temperature rise for guaranteed load and no-load losses shall be incorporated in the test report to verify conformance. During the test, additional means of sealing such as overtensioning of bolts shall not be carried-out. Also, tap switch operation shall be free, i.e. not overtightened during the test. Oil leaks during temperature rise tests would constitute failure of the unit.

6.6 Overload Temperature Rise Type Test Tenderers are required to conduct a temperature rise test on the same unit which underwent the temperature rise type test of Clause 6.5 to verify that the maximum hot spot winding temperature of 140°C is not exceeded when the ambient is 20°C for an overload condition of 1.45 times the normal rated load on any tapping for up to 2 hours after continuous operation at 0.6 times the normal rated load. The results of this test shall be incorporated in the test reports for temperature rise. During the overload test, the LV switchgear assembly shall be fitted with 400 A fuses to the 400 A fuse switches, 630 A fuses to the 630 A fuse switch and 2 X 800A fuses to the 1260A fuse switch. All load terminals of the assembly shall be short circuited allowing overload currents to flow (1.45 times txf normal rated load). Record temperatures of 'a' phase load contact on each fuse switch. Tenderers shall state in the schedules the designed top oil/winding temperature rise for this condition. Oil leaks during temperature rise tests would constitute failure of the test.

6.7 Short Circuit Type Tests A short-circuit test in accordance with AS 2374, Part 5 shall be carried out on transformers rated 200 kVA and above. Should a unit fail test, subsequent tests to provide compliance with the Standard's requirements shall be to the supplier's costs. If required by the Purchaser, a visual inspection of the unit on return shall be conducted in the presence of the Purchaser's representative.

6.8 Routine Pressure Tests To prove the sealed transformers are adequately sealed, the following routine test shall be required on each fully assembled transformer. Establish and monitor internal transformer pressure. The test pressure shall equal the maximum pressure stated on the rating plate.




If, after 30 minutes, the pressure has not dropped more than 2 kPa, the transformer will be considered to be have passed the test. Ambient temperature variation shall be within +2°C.

6.9 Partial Discharge Tests All insulation composed of synthetic material shall be subject to tests for the measurement of partial discharge in accordance with the provision of AS 60270. Such tests shall demonstrate that the insulation is free of discharges of magnitude greater than 20 pC, when subjected to a test voltage of 15 kV. Reports of these tests shall be supplied with test reports of other routine tests. Where the synthetic material insulation has a long history of proven performance, the Purchaser may consider accepting batch testing providing sufficient data is forwarded to support the claims made about the material.

6.10 Current Transformer Type Tests Type tests shall be conducted in accordance with Clause 6.1 of AS 60044.1. Tests shall be carried out on current transformers of identical design to those offered and the test certificate shall be supplied with the Tender. Details are to be attached to the Tenderers response.

6.11 Batch Tests • All conductors shall have been inspected and tested in accordance with AS 1194. • The dielectric strength of oil shall be tested in accordance with AS 1767.

6.12 Porosity Tests Porosity tests shall be carried out by the Supplier or their subcontractor for porcelain components in accordance with the requirements of Clause 5.6 of AS 4398, Part 2.

6.13 Acceptance Tests The Purchaser reserves the right to repeat any or all tests (subject to AS 2374 and AS 60076 provisions) during its acceptance test stage.

6.14 Witnessing Of Tests • The Purchaser reserves the right to witness all type tests and randomly witness

routine testing. • The Supplier shall give the Purchaser not less than one weeks notice (local)/two

weeks (interstate) of when each and every type test will be carried out.

6.15 Test Certificates Two certified copies of all test results shall be supplied to the Purchaser. One copy of the appropriate test results including work sheets which provide enough information to repeat calculations shall accompany each transformer delivered to the Purchaser. The other copy shall be forwarded to the nominated Officer as advised by the Purchaser. Payment of the contract value shall not become due and payable unless and until the certified test results showing that the plant complies with the specification and that the manufacturer's guarantees are within the tolerances specified, have been received by the Purchaser.




All test certificates shall state the manufacturer's serial number, the corresponding Purchaser's transformer number, the order number, contract number, item number and guaranteed losses.

7. Risk Assessment

7.1 Compliance The Tenderer warrants (without limiting any other warranties or conditions implied by law) that all Goods have been produced, sold and delivered to the Principal in compliance with all applicable laws (including all workplace health and safety and electrical safety legislation, codes of conduct and the Principal’s Workplace Health & Safety and Electrical Safety Conditions).

7.2 Formal Risk Assessment Tendered items will be subjected to a formal risk assessment prior to acceptance. The Advisory Standard for Plant requires the Tenderer to perform a risk assessment and provide the resultant documentation to the Purchaser with their tender. Where risk assessment documentation is not provided with the tenders, or does not meet the required standard, such tenders may be rejected or will have their price loaded with the estimated costs associated with the Purchaser conducting the assessments. Any documented risk assessment which accompanies the tender will meet the requirements of AS/NZS 4360:1995 Risk Management as a minimum standard and address the five main steps of the process. It is preferred that the risk assessment methodology uses an energy model to identify hazards.

7.3 Hazards The risk assessment/s will identify hazards to the corporation’s personnel, public and property associated with:

a) The installation of the equipment b) The operation and maintenance of the equipment during life expectancy c) Dismantling/ disposal of equipment at end of life. d) The 'Risk Assessment' schedule included with this specification is to be completed

by the Tenderer. Note: The schedule contains a generic set of questions designed to cover all of the Purchaser's plant and materials and the tenderer is only required to complete those items applicable to the product offered. Where required by some questions, full details to support answers will be furnished.

8. Quality Assurance

8.1 Documentary Evidence Tenderers are required to submit evidence that the design and manufacture of the transformers is in accordance with AS/NZS ISO 9001.




9. Samples

9.1 Production Samples Samples of typical units may be required during the tender assessment period. Samples would normally only be required from tenderers who have previously not supplied transformers to the Purchaser. When samples are required, production samples shall be delivered freight free, suitably packaged and labelled including reference to the Contract Number. The Purchaser may at its discretion either purchase the samples at the tendered price or return the samples to the respective tenderer after the contract has been awarded.

10. Packaging and Marking

10.1 Method of Preservation And Packaging The packaging of the substations by the suppliers must ensure that the transformers are capable of being delivered undamaged giving due consideration to the quantity, distance of transportation and the preferred method of handling at each location.

10.2 Marking of Goods for Delivery Delivery documents accompanying substations to be delivered shall contain the following information:

• The Purchaser's Contract number • The Purchaser's Order number against which the plant is being supplied. • Item description • Quantity

This information will be provided to the Supplier on each order issued by the Purchaser on the contract.

11. Service Performance

Tenderers shall state: (a) the period of service achieved by the items offered within Australian service

conditions (b) Australian electricity supply authorities who have a service history of the items offered (c) Contact names and phone numbers of relevant employees of those supply authorities

who can verify the service performance claimed. In the absence of relevant Australian Service performance, the information required in (a), (b) and (c) above will be stated for service history in overseas countries. Priority will be given to performance in environments similar to those described above.




12. Reliability

12.1 Service Life Tenderers are required to comment on the reliability and performance of the materials offered for a service life of 35 years under the specified system and environmental conditions.

12.2 Evidence in Support of Reliability Such comments shall include evidence in support of the reliability and performance claimed including information on Failure Mode and Effect Analysis.

13. Training

13.1 Training Material The successful Tenderer is required to provide training material in the form of manuals to the Purchaser's requirements.

13.2 Detailed Installation, Operation and Maintenance Manuals Within ten (10) weeks of placing of the order, the successful tenderer shall supply to the Purchaser two (2) copies of a detailed installation, operation and maintenance manual incorporating the following information:

• A complete winding specification to the satisfaction of the Purchaser which will enable repairs to be carried out.

• A detailed list of all component parts including manufacturers part numbers. • One copy of each of the drawings called for in Clause 15.4. • A detailed maintenance section which is designed to achieve the expected asset

life; including reference to: (a) Repair procedures for surface coatings (b) Special precautions during disassembly and reassembly (including

bushings) (c) Relevant special requirements for reassembly (e.g. nut/bolt tensions,

crimp connections, welding, etc.) (d) handling, including the use of forklift for moving the substations. (e) Disposal at end of service life.

The successful Tenderer is also required to provide face-to-face operator training at the Purchaser's regional centres located in Cairns and Rockhampton. All costs associated with the provision of training shall be accounted for in the tender price for each item. The Contractor shall permit the Purchaser to produce a facsimile copy or generate computer graphic images from either the equipment, manuals or drawings supplied under this contract for the production of training materials. The training material shall remain the intellectual property of the Purchaser. However prior to commercially marketing the training material, the plant suppliers' concurrence would be sought; which shall not be unreasonably withheld.




14. Environmental Considerations

14.1 Environmental Soundness Tenderers are required to comment on the environmental soundness of the design and material used in the manufacture of the items offered. In particular, comments should address such issues as recyclability and disposal at end of service life.

14.2 EMF Levels Tenderers are required to provide with the tender, EMF levels at transformer normal maximum load assuming a balanced and evenly spread load over each circuit. Such EMF levels are required at a point midway along each side, and diagonally out from each corner, at a distance of 1m above and beyond the base.

15. Information to be Provided

15.1 Specific Technical Requirements Attachment 2 is a schedule of the technical details tenderers are required to complete and return with their tender. Successful Tenderers shall provide, on completion of prototype testing, additional information per Part "B" - Plant Details of Attachment 2.

15.2 Checklist of Supporting Documentation Additionally, information specified in this document as required to be submitted with the tender, including but not limited to:

• Attachment 3 – Recommended Spares. • Attachment 4 – Risk Assessment • Attachment 5 – Technical Documentation Checklist • Reliability, Environmental Considerations & Service History

Tenderers are required to complete the above Attachments and return them with their tender, together with other information required

15.3 Drawings and Information to be Submitted with the Tender To enable the Purchaser to properly evaluate the equipment being offered, (in addition to the completed attachments) Tenderers will submit two (2) copies of the following information with their tender:

a) A list showing similar equipment supplied to or on order from other Australian Electricity Supply Authorities.

b) General arrangement drawings of the substations offered including details of the transformers, enclosures, bases, LV switchboard layouts and HV ring main unit details (including proposed details for future remote operation).

c) LV wiring & associated equipment for remote LV monitoring including antenna details.

d) Facilities and proposed details for future remote operation of HV ring main unit. e) Type test certificates for the transformers offered, or transformers of similar design

and rating (if available). f) Typical loading curves (for loading transformers in accordance with AS 2374, Part

7) g) Short circuit test details for equipment of similar design and rating. h) Typical installation and maintenance manuals.




i) Full details of the protective coatings offered. j) A list of all departures of the tender from this specification. The Purchaser may require additional information to be provided for tender analysis purposes and such information will be provided promptly as requested.

15.4 Drawings and Information to be Provided by the Supplier Within six weeks from the letter of acceptance, the Supplier will provide three copies of drawings and information necessary to enable the Purchaser to examine the general design and arrangement. The Purchaser will comment on drawings supplied under this contract in relation to how the equipment interfaces with the Purchaser's design, construction, operation, maintenance and other requirements. Comments about drawings by the Purchaser will not in any way absolve the Supplier of responsibility for the safety and reliability aspects of the plant or equipment supplied. The Supplier will amend the drawings as directed and resubmit them to the Purchaser within one week. In the event of the Supplier proceeding with work before such comment has been given in writing, any necessary alterations and modifications will be carried out at the Supplier's own expense. These drawings and information will include the following.

(a) A fully dimensioned general arrangement drawing(s) for each

susbstation rating showing: • Details of the transformer • Details of the enclosure • Details of the base including an Engineer's Certified Design

Certificate for the base • Low Voltage switchboard layout • High Voltage ring main unit details • All electrical clearances • Terminal/bushing heights and terminal palm details • Centre-lines and centre of gravity • Lifting (with maximum sling angle identified) as well as lifting points

using a forklift and tie down points • Mass

(b) A drawing showing the rating and terminal marking plates for each

transformer rating. (c) Erection, testing and maintenance manual(s) - three printed and three

electronic copies (in Microsoft Word format), of erection and testing manual(s) in a form that is suitable to the Purchaser. The manual will contain the following information with particular reference to the equipment being supplied to this specification: • A comprehensive description of the substation, its construction,

operation and performance capabilities. • A tabulation of the guaranteed electrical and mechanical

performance characteristics of the equipment. • Detailed procedure for receiving, handling and storage • Pre-energisation checks on components and assemblies




• A complete winding specification to enable repairs to be carried out

• An exhaustive list of components clearly identifiable by means of a drawing and the suppliers' catalogue/part number

• Repair procedures for surface coatings • Special precautions during disassembly and reassembly (including

bushings) • Relevant special requirements for reassembly (e.g. nut/bolt

tensions, crimp connections, welding, etc.) • Routine maintenance recommendations • Disposal at end of service life

Note: Each erection and testing procedure will be illustrated by clearly identifiable and labelled

16. Quality of Drawings

16.1 Drawing Title Block The drawing title will be a concise description of the contents of the drawing; it will contain a sufficient number of distinct lines each describing an aspect of the drawing so that all lines together represent an accurate and complete description. The title will be designed so that it reads from the general to the particular, top to bottom, as indicated in the following example: CONTRACT NO. C / PLANT SPECIFIC eg PADMOUNTED DISTRIBUTION SUBSTATION MANUFACTURE TYPE eg 11000/433V 500 kV.A DRAWING FUNCTION eg GENERAL ARRANGEMENT

16.2 Drawing Revisions A revision space will be provided on each drawing sheet. The original issue of the drawing is usually indicated as an 'A'; the first revision is therefore 'B'. Revision descriptions should be as brief and concise, as possible and where appropriate should indicate the previously existing situation, eg "Section 'B' dimension 1028 mm was 1044 mm". Where there are numerous revisions on the same drawing it will be necessary to highlight the revision note with a `cloud effect' or similar highlighting, and similarly each correspondingly revised area of the drawing. The revision block for each revision will contain:

a) The revision letter in prominent display. b) A brief description of the revision. c) The draftsperson's initials. d) An approval signature and date.




16.3 Drawings in Electronic Format Tenderers will also provide drawings in electronic format to AS 1102 and AS 1103. The Purchaser has a preference for MICROSTATION format however AutoCAD format is also acceptable.




17. Attachment 1 – Specific Requirements

This part of the specification sets out the technical requirements for items using (A) General Descriptions; (B) Electrical Schematic Representation (for padmounted substations) and (C) Detailed Requirements in Table Format. (A) General Descriptions

Item No.

ERGON ENERGY


1 2408037

TRANSFORMER, Distribution, Padmount, 22kV/433-250V, 200kVA, 3 Ph, 50 Hz, ONAN, with LV Switchgear and HV SFU (1 x switch disconnectors and 1 x fuse switch). (Rectangular plinth nominal size 1310mm x 4100mm), Tech Spec ETS02-02-02 Item 1


3 2424075


4 2408078


5 2408052




8 2424083


9 2408110


10 2408094


11 2404657


12 2404659





Item No.

ERGON ENERGY


13 2424091


14 2408169


15 2408144





(B) Electrical Schematic Representation Schematic diagrams (Figures 1 to 9) of item configurations show the basic equipment contained within each padmounted substation in single line diagram format. Note that although some items are listed together under the same schematic (eg Item 2, 6 and 7 in Figure 1), variations still exist within these items (e.g. CT ratios etc) and such details are provided in Attachment 1. HV SWITCHGEAR SIDE / END LV SWITCHGEAR SIDE / END

Figure 1 Equipment Schematic for items 2, 6, and 7: 315kVA and 500kVA Padmounted Substation with LV Switchgear only.

HV SWITCHGEAR SIDE / END LV SWITCHGEAR SIDE / END

Figure 2 Equipment Schematic for items 11 and 12: 1000kVA Padmounted Substation with LV Switchgear only. (Although 2 LV switch disconnectors are shown above, a 3 phase 1260A fuse switch is required in lieu of the customer mains isolator. Refer Clause 5.20.2)





Figure 3 Equipment Schematic for items 3 and 8: 315kVA and 500kVA Padmounted Substation with HV RMU and LV Switchgear HV SWITCHGEAR SIDE / END LV SWITCHGEAR SIDE / END

Figure 4 Equipment Schematic for items 13: 1000kVA Padmounted Substation with HV RMU and LV Switchgear. (Although 2 LV switch disconnectors are shown above, a 3 phase 1260A fuseswitch is required in lieu of the customer mains isolator. Refer Clause 5.20.2)





Figure 5 Equipment Schematic for item 1: 200kVA Padmounted Substation with LV Switchgear and HV SFU. Note: 2 LV fuse switches only required for item 1. HV SWITCHGEAR SIDE / END LV SWITCHGEAR SIDE / END

Figure 6 Equipment Schematic for items 4 and 9: 315kVA and 500kVA Padmounted Substation with LV Switchgear and HV RMU with Tee-off feeder switch.





Figure 7 Equipment Schematic for item 14: 1000kVA Padmounted Substation with LV Switchgear and HV RMU with Tee-off feeder switch. (Although 2 LV switch disconnectors are shown above, a 3 phase 1260A fuseswitch is required in lieu of the customer mains isolator. Refer Clause 5.20.2) HV SWITCHGEAR SIDE / END LV SWITCHGEAR SIDE / END

Figure 8 Equipment Schematic for item 15: 1000kVA Padmounted Substation with LV Switchgear and HV RMU plus Fuse Switch Disconnector. (Although 2 LV switch disconnectors are shown above, a 3 phase 1260A fuseswitch is required in lieu of the customer mains isolator. Refer Clause 5.20.2)





Figure 9 Equipment Schematic for items 5 and 10: 315kVA and 500kVA Padmounted Substation with LV Switchgear and HV RMU plus Fuse Switch Disconnector.




(C) (1) DETAILED REQUIREMENTS - TRANSFORMER

REF. PARTICULARS UNITS ITEM 1

ITEMS 2 to 5

ITEMS 6 to 10 ITEMS 11 to 15

1. Rated power kV.A 200 315 500 1000

2. Number of phases 3

3. Rated frequency Hz 50

4. Rated voltage ratio V 22000/433

5. Vector group Dyn11

6. Method of cooling ONAN

7. Type of transformer Sealed

8. Insulation level

8.1 HV winding impulse voltage withstand

kV peak

150

8.2 Power frequency voltage withstand

kV rms

50

8.3 Power frequency voltage withstand of LV winding

kV rms

10

9. Impedance voltage at rated current on principle tapping

% 4.0 5.0

10. Tapping range 0 ± 2½% ± 5% + 7½% + 10%

11. HV bushings Bushing wells and plug inserts (Elastimold cat.K1601 PC-S1/K1501A1 or equivalent) suitable for use with

Elastimold non-load break elbows K156LR-WX

12. LV bushings – Current rating of stem and terminal palms

A To suit specified ratings including overload requirements of transformers

13. Mean sound power level dB(A) 56 59 61.5 65.7

14. Degree of protection for HV and LV switchgear compartments

IP46

15. Clearance in air (minimum)

15.1 LV phase-to-phase mm 100

15.2 LV phase-to-earth (and neutral)

mm 60

16. DIMENSIONAL LIMITATIONS

16.1 Reference See Drawing No's A3 889831-01, A3 889824-01 and specification




(C) (2) DETAILED REQUIREMENTS HIGH VOLTAGE EQUIPMENT - ASSEMBLY

REF. PARTICULARS UNITS SPECIFIC REQUIREMENTS

Items with HV Equipment

1. Rated voltage kV 24 2. Number of phases 3 3. Rated frequency Hz 50 4 Rated lightning impulse withstand voltage 4.1 To earth and between phases kVp 125 4.2 Across the isolating distance kVp 145 5. Rated one minute power frequency withstand

voltage

5.1 To earth and between phases kV rms 50 5.2 Across the isolating distance kV rms 60 6. Rated short time withstand current kA 20 7. Rated short time duration s 3 8. Rated peak withstand current kAp 40 9. Partial discharge level at test volts pC 20 10. Degree of protection (main tank) IP 46 11. Degree of protection (cable boxes) IP 20

(C) (3) DETAILED REQUIREMENTS HIGH VOLTAGE EQUIPMENT - FEEDER SWITCH

DISCONNECTOR SUBCOMPONENT

REF. PARTICULARS UNITS SPECIFIC REQUIREMENTS ITEMS With HV, RMU

1. Rated current A 630 2. Rated making capacity

(switch and earthswitch) kA peak 40

3. Number of fault make operations at rated making current

3.1 Preferred 20 3.2 Minimum 5 4. Rated transformer magnetising current

breaking capacity

A 8

5. Rated cable charging breaking current A 10 6. Switching operation 3 ph. 7. Minimum number of load break

operations at rated normal current 100

8. Degree of protection (main tank) IP 46 9. Degree of protection (cable boxes) IP 20




(C) (4) DETAILED REQUIREMENTS HIGH VOLTAGE EQUIPMENT - SWITCH FUSE UNIT SUBCOMPONENT

REF. PARTICULARS UNITS SPECIFIC REQUIREMENTS ITEMS with HV switchgear

1. Rated current A 200 2. Rated fault making capacity (switch) kA peak 40 3. Number of fault make operations at rated

making current

3.1 Preferred 20 3.2 Minimum 5 4. Rated transformer magnetising current

breaking capacity A 8

5. Switching operation 3 ph. 6. Minimum number of load break operations at

rated normal current 100

7. Degree of protection (main tank) IP 46 8. Degree of protection (cable boxes) IP 20

(C) (6) DETAILED REQUIREMENTS LOW VOLTAGE SWITCHGEAR

REF. PARTICULARS UNITS SPECIFIC REQUIREMENTS ITEM

1 ITEMS 2 to

5 ITEMS 6 to 10

ITEMS 11 to 15

1. Nominal voltage V 415 2. Highest voltage V 500 3. Number of phases 3 4. Frequency Hz 50 5. Fault level kA/1s 50 6. Power frequency withstand

voltage kV 2

7. Rated peak withstand current

kAp 50

8. Rated short time current for 1 second

kA 50

9. Silver plating thickness mm .010 minimum 10. Insulation level between

terminals when fitted with maximum size cable lugs

kV 2.5

11. Minimum number of mechanical operations before replacement

1 000

12. Degree of protection 12.1 In open position IP10 12.2 In closed position IP20 13. Quantity of fuse switch units

per substation

13.1 630 A carrier and 630 A base assembly

0 0 0 2




13.2 400 A carrier with 630 A base assembly

2 5 5 0

13.3 Provision for additional fuse switch units

1 1 1 1

13.4 1260A fuse switch assembly 1 14. Switch disconnector rated

load breaking capacity A 1000 1000 1000 2000

C) (7) DETAILED REQUIREMENTS LV CURRENT TRANSFORMERS

SPECIFIC REQUIREMENTS REF PARTICULARS UNITS ITEM 1 (200kVA)

ITEMS 2 to 5 (315kVA)



1. Nominal Voltage Un 415 415 415 415 2. Highest Voltage Um 660 660 660 660 3. Rated Frequency Hz 50 50 50 50 4. Rated Insulation Level (RIL) kV 2.5 2.5 2.5 2.5 5. Rated Transformation Ratio A/A 200/5 800/5 800/5 1500/5 6. Thermal Limit Current A 400 1600 1600 3000 7. Rated Short Time Current A 40 40 40 40 8. Rated Short Time Value Sec 0.5 0.5 0.5 0.5 9. Accuracy Class/Designation Class 1.0 1.0 1.0 1.0 10. Rated Burden (Min) Ohms 0.2 0.2 0.2 0.2 11. Rated Output (Min) VA 5 5 5 5 12. Instrument Security Factor 10 10 10 10 C) (8) FOR METERING PANEL

REF. PARTICULARS UNITS SPECIFIC REQUIREMENTS 1. Panel Size (for Meter + Comms Unit) mm W200 x H400 x D150 2. Panel Material Non-hydroscopic, insulating material 3. Fuse and cartridge type A 6A, Type NS 4. Preferred Test Link Type ESAA Pattern with bridging link

SIGNATURE OF TENDERER: _________________________________




18. Attachment 2 – Technical Details to be Provided By Tenderers

THE FOLLOWING TABLES DETAIL PARAMETERS TO BE PROVIDED BY THE TENDERER FOR ALL ITEMS COVERED BY THIS SPECIFICATION. PART (A) - GUARANTEED PERFORMANCE - IS TO BE COMPLETED AND SUBMITTED WITH THE TENDER. PART (B) - PLANT DETAILS - IS TO BE COMPLETED AND SUBMITTED BY THE SUCCESSFUL TENDERER AFTER AWARD.

(A) GUARANTEED PERFORMANCE (1) IN RELATION TO ATTACHMENT 1

REF. ITEM NO.

DO THE PADMOUNTED SUBSTATIONS CONFORM TO ALL THE SPECIFIED CRITERIA LISTED IN ATTACHMENT 1

YES/NO IF "NO" THEN STATE ALL NON-CONFORMANCES 1. 1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.




(A) GUARANTEED PERFORMANCE (2) FOR TRANSFORMERS

REF. PARTICULARS UNITS ITEM 1 (200kVA)

ITEMS 2 to 5

(315kVA)

ITEMS 6 to 10

(500kVA)

ITEMS 11 to 15

(1000kVA) 1 Losses on principal tap at

75°C:

1.1 Load W 1.2 No Load W 1.3 Efficiency at 50% load % 2. Temperature rise limits

during overload condition

2.1 Top oil °C 2.2 Winding °C 3. Ability to withstand short

circuit

3.1 Symmetrical short circuit current withstand capacity

p.u

3.2 Duration of the symmetrical short circuit current

s

3.3 Hot spot winding temperature rise at the end of withstand period

°C

3.4 Number of terminal short-circuits which the transformer will withstand without permanent winding deformation

3.5 Permissible variation in short circuit impedance between phases

%

4. Minimum insulation resistance at 20°C (1 kV test after 1 minute) for

4.1 HV winding M ohms 4.2 LV winding M ohms 4.3 Core M ohms 5 Can the transformers

including switchgear, fittings and accessories be loaded in accordance with Clause 5.4 of the specification?

Yes/No

6. Continuous permissible overvoltage at any tap

%

7. Method of oil filling adopted




(A) GUARANTEED PERFORMANCE (3) FOR HIGH VOLTAGE SWITCHGEAR ASSEMBLY

REF. PARTICULARS UNITS ITEMS WITH RMU

ITEMS WITH SFU

1. D.C. voltage ratings 1.1 Maximum d.c. withstand across the

isolating distance with the d.c. test voltage applied to the cable contact and the busbar energised at highest system voltage (indefinite withstand time required)

kV

1.2 D.C. flashover voltage with the d.c. test voltage applied to the cable contact and busbar energised at highest system voltage

kV

2. Rated normal current 2.1 Busbars A 2.2 Circuit A 2.3 Fused tee off A 3. Have all components been fully type

tested with respect to design/ material and manufacturing process

YES/NO

4. Resistance measurements 4.1 Ohmic resistance between extreme

cable terminal lugs µ ohms

4.2 Tolerance per phase %

4.3 Tolerance per unit % (A) GUARANTEED PERFORMANCE (4) FOR THE HV RING MAIN SWITCH

REF. PARTICULARS UNITS ALL APPLICABLE ITEMS 1. Rated mainly active load break

capacity A

2. Rated closed loop break capacity

A

3. Operating mechanism 3.1 Inspection free interval months 3.2 Maintenance free interval months 4. Number of operations at rated

normal current

5. Number of operations at rated short circuit making current

6. Can 3 X 1Core 630mm² Aluminium XLPE cables be connected within the circuit cable box?

YES/NO

7. Are all three phases operated simultaneously during switching

YES/NO




(A) GUARANTEED PERFORMANCE (5) FOR THE HV FUSED TEE-OFF SWITCH

REF. PARTICULARS UNITS ALL APPLICABLE ITEMS 1. Rated mainly active load break

capacity A

2. Rated closed loop break capacity

A

3. Operating mechanism 3.1 Inspection free interval months 3.2 Maintenance free interval months 4. Number of operations at rated

normal current

5. Maximum permissible heat dissipation of fuse holder

W

6. Minimum fuse striker pin energy required to trip fuse holder

J

7. Can 3 X 1 Core 185mm² Aluminium XLPE Triplex cables be connected within the circuit cable box?

YES/NO

8. Are all three phases operated simultaneously during switching

YES/NO

(A) GUARANTEED PERFORMANCE (6) FOR THE HV SWITCHGEAR EARTH SWITCH

REF PARTICULARS UNITS ALL APPLICABLE ITEMS 1. Rated making capacity 1.1 Ring earth switch kA peak 1.2 Switch fuse earth switch kA peak 2. Rated short time withstand

current

2.1 Ring earth switch kA 2.2 Switch fuse earth switch kA 3. Rated short time s 4. Number of operations at rated

normal current before maintenance/replacement




(A) GUARANTEED PERFORMANCE (7) FOR THE LV SWITCH DISCONNECTORS


ITEMS 2 to 5

ITEMS 6 to 10 ITEMS 11 to 15

1. Rated normal current A 2. Rated voltage V 3. Rated making capacity kAp 4. Mass kg 5. Number of operations

at rated normal current

6. Are switch disconnectors dead front?

YES/NO

7. Are the switch disconnectors fully type tested to AS 3947.3 (or equivalent)

YES/NO

8. Is the equipment three phase of single switching?

9. If three phase, is it sequential or simultaneous?

10. Are all the non-metallic components of the switch assembly

10.1 Non-combustible 10.2 Flame-resistant 10.3 Flame-retardant 11. Have any tests been

carried out to determine the ignitability and flame propagation of the non-metallic components?




(A) GUARANTEED PERFORMANCE (8) FOR THE LV 400A, 630A AND 1260A FUSE SWITCHES

REF. PARTICULARS UNITS 400A 630A 1260A 1. Rated normal current A 2. Rated voltage V 3. Rated load breaking capacity 3.1 With fuse links installed A 3.2 With isolating links installed A 4. Rated making capacity 4.1 With fuse links installed A 4.2 With isolating links installed A 5. Rated peak withstand current 5.1 With fuse links installed kA 5.2 With isolating links installed kA 6. Type of material used for busbar and cable

termination

7. Maximum copper cable size which can be connected

mm²

8. Maximum lug size used on copper cable mm² 9. Maximum aluminium cable size which can be

connected mm²

10. Maximum lug size used on aluminium cable mm² 11. Minimum thickness of silver plating on contacts µ mm 12. Insulation level between terminals fitted with

maximum size cable lugs kV

13. Are the fuse switches fully type tested to AS 3947.3 (or equivalent)?

14. Is the equipment three phase or single phase switching?

15. If three phase, is it sequential or simultaneous? 16. Are fuse switches capable of being fitted or

removed live? Yes/no

17. 400A fuse switches capable of only accepting DIN 2 fuses?

Yes/no

18. 630A fuse switches capable of accepting DIN 2 & 3 fuses?

Yes/no

19 1260A fuse switches capable of accepting 2 X DIN 3 800A fuses?

Yes/no

20. Are all the non-metallic components of the switch assembly

20.1 Non-combustible 20.2 Flame-resistant 20.3 Flame-retardant 21. Have any tests been carried out to determine the

ignitability and flame propagation of the non-metallic components?

22. State current rating of fuses that can be fitted 23. Watts dissipation permissible for LV fuse switch

units W




(A) GUARANTEED PERFORMANCE (8) FOR THE LV 400A, 630A AND 1260A FUSE SWITCHES - Continued

24. Number of load break operations before replacement required

25. Are LV fuse switch units dead front? YES/NO 26. (a) Can 2 x 240 mm² aluminium cables be

connected per phase to 400A & 630A units (b) Nominate maximum number of 300mm2 Copper cables that can be connected to 1260A units

YES/NO

Number

(A) GUARANTEED PERFORMANCE (9) FOR THE LOW VOLTAGE CURRENT TRANSFORMERS

SPECIFIC REQUIREMENTS REF. PARTICULARS UNITS ITEM 1 (200kVA)




1. Nominal Voltage Un 2. Highest Voltage Um 3. Rated Frequency Hz 4. Rated Insulation Level (RIL) kV 5. Rated Transformation Ratio A/A 6. Thermal Limit Current A 7. Rated Short Time Current A 8. Rated Short Time Value Sec 9. Accuracy Class/Designation Class 10. Rated Burden Ohms 11. Rated Output VA 12. Instrument Security Factor

(A) GUARANTEED PERFORMANCE (10) FOR METERING PANEL

REF. PARTICULARS UNITS ALL APPLICABLE ITEMS

1. Panel Size (for Metern + Comms Units) mm 2. Panel Material 3. Fuse and cartridge type A 4. Test Link Type




(A) GUARANTEED PERFORMANCE (11) FOR ANTENNA DETAILS

REF. PARTICULARS UNITS ALL APPLICABLE ITEMS

1. Frequency Band MHz

2. Gain

3. Impedance Ohms

4. VSWR

5. Pattern

6. Polarization

7. Cable type

8. Connector type

(A) GUARANTEED PERFORMANCE (12) FOR THE LOW VOLTAGE AND HIGH VOLTAGE CABLES


ITEMS 2 to 5

ITEMS 6 to 10

ITEMS 11 to 15

1. LV cross-section area x number of cable

mm² x .

2. Current rating LV cables

A

3. HV cross-section area

mm²

4. Impulse level of HV cable

kV

5. Current rating of HV cables

A

(A) GUARANTEED PERFORMANCE (13) SWITCHGEAR ASSEMBLY

REF. PARTICULARS UNITS ALL ITEMS 1. Guaranteed maximum

temperature of 'a' phase load contact on LV fuse switch to be measured during overload temperature rise test of Clause 6.6 of the specification for:

1.1 200 kVA’s °C 1.2 315 kVA's °C 1.3 500 kVA's °C 1.4 1000 kVA's °C 1.5 1000 kVA 1260A °C

(A) GUARANTEED PERFORMANCE




(14) GENERAL

REF. PARTICULARS UNITS ALL ITEMS 1.

Is interchangeability with previous contracts achieved? (Items 1 to 15 only)

YES/NO

2. Cubicle material Marine grade aluminium MF 502H32

YES/NO

3. Degree of protection for cubicle IP 4.0 Type of plinth offered (Items 1 to 15 only) 4.1 Type of plinth offered (Items 16 to 29 only) 4.2 Are specified critical dimensions for

transformer/cubicle – Drawings No 889831-01 and 889824-01 adhered to? (Items 6 and 11 - 3700mm long. Items 1 to 5, 7 to 10 and 12 to 15 - 4100mm long)

YES/NO

5.0 Protective coating (all particulars to be submitted with tender documents)

5.1 Paint Reference number per AS 2312 5.2 Minimum total thickness of protective

coating to steel components mm

5.3 Minimum total thickness of protective coating to aluminium components

mm

6. Are details of the protective coating included with tender documentation?

YES/NO

7. Are typical General Arrangement drawing included with tender documentation?

YES/NO

8. Is warranty for the protective coating included with tender documentation?

YES/NO

9. Does the Tenderer have a conforming quality assurance system?

YES/NO

10 Details of HV Switchgear offered 10.1 Make 10.2 Catalogue description 10.3 Catalogue number 10.4 Insulating medium 10.5 Country of manufacture 11.0 Details of LV Switchgear offered 11.1 Make 11.2 Catalogue description 11.3 Catalogue number

12. In the event of being successful, does the Tenderer agree to complete the following Section "B" - Plant Detail – questions and supply the responses to the Purchaser within six weeks of being awarded the contract? (Only for successful items)

YES/NO

(B) PLANT DETAILS (Note: Not required to be submitted with the tender)




(1) GENERAL

REF. PARTICULARS UNITS RESPONSE REQUIRED FOR ALL ITEMS AWARDED TO THE SUCCESSFUL TENDERER

1. Cubicle dimensions 1.1 Length mm 1.2 Width mm 1.3 Height (top of plinth to

highest point of cubicle, excluding lifting lugs)

mm

1.4 Thickness of material mm 2. Plinth/base 2.1 Length mm 2.2 Width mm 2.3 Height mm 3. Doors 3.1 Dimensions of end door

openings mm

3.2 Dimensions of side door openings

mm

3.3 Are doors fully recessed? YES/NO 3.4 Length door edge return 4. Total mass of complete

unit kg

(B) PLANT DETAILS (2) TRANSFORMER


1. Dimensions 1.1 Length (parallel to plane of core) mm 1.2 Width (transverse to plane of core) mm 1.3 Height mm 2. Mass 2.1 Total complete with all fittings filled

out with oil and ready for service kg

2.2 Core and windings kg 3. Insulating oil (required to fill to

correct level of 15°C)

3.1 Mass kg 3.2 Volume litre 3.3 PCB free YES/N

O

4. HV bushings 4.1 Make 4.2 Type 4.3 Current rating A 4.4 Total creepage length mm




4.5 Gasket material 4.6 Gasket thickness mm 5. LV bushings 5.1 Make 5.2 Type 5.3 Current rating A 5.4 Total creepage length mm 5.5 Gasket material 5.6 Gasket thickness mm 6. HV windings 6.1 Type 6.2 Conductor material 6.3 Shape of conductor 6.4 Mass kg 6.5 Conductor insulation material A/mm² 6.6 Current density A/turn 6.7 Rated volts per turn 7. LV windings 7.1 Type 7.2 Conductor material 7.3 Shape of conductor 7.4 Mass kg 7.5 Conductor insulation material A/mm² 7.6 Current density

(B) PLANT DETAILS (2) TRANSFORMER - Continued


8. Core type 8.1 Type 8.2 Trade name and grade of electrical

steel

8.3 Country of supply 8.4 Mass kg 8.5 Flux density T 8.6 Specific loss W/kg 9. Impedance voltage components at

rated current on principal tapping

9.1 Resistance voltage % 9.2 Reactance voltage % 10. Regulation 10.1 Unity p.f. % 10.2 0.8 p.f. % 11. Degree of dryness achieved prior

to oil filling %




12. Vacuum withstand capacity 12.1 Tank kPa 12.2 Radiators kPa 13. Clamping pressures on coils prior

to oil filling kPa

14. Design withstand pressure of tank mPa 15. Short time overload rating (from

rated load at rated ambient temperature)

15.1 2-hour emergency rating kV.A 15.2 8-hour emergency rating kV.A 15.3 24-hour emergency rating kV.A

(B) PLANT DETAILS (3) HIGH VOLTAGE SWITCHGEAR ASSEMBLY (FOR APPLICABLE ITEMS)

REF PARTICULARS UNITS RESPONSE REQUIRED FOR ALL ITEMS

1. Manufacturer 2. Country of manufacture 3. Insulating medium 4. Conductor materials 4.1 Busbar 4.2 Ring main switches 4.2 Switch fuse 5. Dimensions 5.1 Height mm 5.2 Width mm 5.3 Depth mm 6. Mass kg 7. Volume/quantity of insulation

medium

7.1 SF6 7.2 Other (please specify) litre 8. For ring main switchgear using

vacuum bottles

8.1 Make of bottle 8.2 Shelf life of the bottle 8.3 What method is used to check

integrity of the vacuum

8.4 What method is used to check contact wear

8.5 X-radiation with 32 kV rms applied across the bottle

mRems

8.6 Voltage withstand capacity across the contacts on loss of vacuum

kV

8.7 Percentage of rated normal current that can be switched on loss of vacuum

%

9. For SF6 filled ring main units 9.1 Material used to absorb arc




products and moisture 9.2 Rated SF6 pressure at 20°C kPa 9.3 Are the units sealed for life? YES/NO 9.4 Percent of rated current that can

be switched on loss of SF6 gas

10. Arc extinguishing medium 11. Maximum continuous operating

temperature rating of the epoxy resin insulation (if applicable)

°C

12. Can the fuse carrier be accessed without dropping the oil level (if required)

YES/NO

(B) PLANT DETAILS (4) HIGH VOLTAGE SWITCHGEAR - EARTH SWITCH ASSOCIATED WITH FEEDER

CABLES

REF. PARTICULARS UNITS RESPONSE REQUIRED FOR ALL ITEMS 1. Make 1.1 Catalogue description 1.2 Catalogue number 2. Overall dimensions mm

(B) PLANT DETAILS (5) HIGH VOLTAGE SWITCHGEAR - EARTH SWITCH ASSOCIATED WITH SWITCH

FUSE

REF. PARTICULARS UNITS RESPONSE REQUIRED FOR ALL ITEMS 1. Make 1.1 Catalogue description 1.3 Catalogue number 2. Overall dimensions mm

(B) PLANT DETAILS (6) HIGH VOLTAGE SWITCHGEAR - HV CABLES

REF. PARTICULARS UNITS RESPONSE REQUIRED FOR ALL ITEMS 1. Make 1.1 Catalogue description 1.2 Catalogue number




(B) PLANT DETAILS (7) LOW VOLTAGE SWITCHGEAR - SWITCH DISCONNECTORS

REF. PARTICULARS UNITS RESPONSE REQUIRED FOR ALL ITEMS 1000 A 2000 A

1. Make 1.1 Catalogue description 1.2 Catalogue number 2. Country of manufacture 3. Overall dimensions 3.1 Height mm 3.2 Length mm 3.3 Depth mm 4. Composition of

switchgear insulating material

(B) PLANT DETAILS (8) LOW VOLTAGE SWITCHGEAR - 400A, 630A AND 1260A FUSE SWITCHES

REF. PARTICULARS UNITS RESPONSE REQUIRED FOR ALL ITEMS 400A 630A 1260A

1. Make 1.1 Catalogue description 1.2 Catalogue number 2. Country of manufacture 3. Overall dimensions 3.1 Height mm 3.2 Length mm 3.3 Depth mm 4. Are the switch disconnectors

extensible?

5. Can the switch disconnectors be extended with the busbars energised

6. Composition of switchgear insulating material

7. Mass (without fuse links) kg (B) PLANT DETAILS (9) LOW VOLTAGE SWITCHGEAR - LV CABLES

REF. PARTICULARS UNITS RESPONSE REQUIRED FOR ALL ITEMS 1. Make 2. Catalogue description 3. Number of cables per phase




(B) PLANT DETAILS (10) FOR THE LOW VOLTAGE CURRENT TRANSFORMERS Technical details to be completed for each ct ratio type provided

REF. PARTICULARS UNITS RESPONSE REQUIRED FOR ALL ITEMS 1 Manufacturer 2. Model/Type 3. Nominal Voltage Un (V) 4. Highest Voltage Um

(V) 5. Rated Frequency Hz 6. Rated Insulation Level kV 7. Rated Transformation Ratio A/A 8. Thermal Limit Current A 9. Rated Short Time Current A 10. Rated Short Time Value Sec 11. Accuracy Class/Designation Class 12. Rated Burden (ohms) Ohms 13. Rated Output (VA) VA 14. Instrument Security Factor 15. Pattern Approval /Type Test

Certificate number

(B) PLANT DETAILS (11) FOR METERING PANEL

REF. PARTICULARS UNITS RESPONSE REQUIRED FOR ALL ITEMS

1. Panel Size mm 2. Panel Material 3. Fuse and cartridge type A 4. Test Link Type 5. Drawings provided showing

enclosure details including internal components and mounting of metering equipment

NAME OF TENDERER: ADDRESS OF TENDERER: SIGNATURE: FOR AND ON BEHALF OF TENDERER DATE: ______________________




19. Attachment 3 – Recommended Spares

RECOMMENDED SPARES REF. PARTICULARS PRICE $A (FIS)

1. RECOMMENDED SPARES: Tenderers shall advise the price for items listed below and also add recommended spares for the padmounted substations together with pricing.

DESCRIPTION PRICE EACH $A

DELIVERY PERIOD IN WORKING WEEKS

1.1 Provision of LV switchboards and related components 1.1(a) 400 A Fuse Switch Unit 1.1(b) 630 A Fuse Switch Unit 1.1(c) 1260A Fuse Switch Unit 1.1(d) LV s/board for 200 kV.A's 1.1(e) LV s/board for 315 kV.A's 1.1(f) LV s/board for 500 kV.A's 1.1(g) LV s/board for 1000 kV.A's 1.1(h) LV Circuit Breaker 2000A assembly suitable for

retrofit to the LV s/board (to include all necessary items and instructions)

1.2 Provision of HV switch gear complete with stand for installation in a substation 1.2(a) HV Ring Main Unit (2 x switch disconnectors and

1 fuse switch)

1.2(b) HV Ring Main Unit (3 x switch disconnectors and 1 fuse switch)

1.2(c) HV Ring Main Unit (2 x switch disconnectors and 2 fuse switch)

1.2(d) HV Switch Fuse Unit (1 x switch disconnectors and 1 fuse switch)

2 Transformer only: 2.1 Tenderers shall advise the price for transformers listed below. 2.1(a) To suit 200kVA rectangular substation 2.1(b) To suit 315kVA rectangular substation 2.1(c) To suit 500kVA rectangular substation 2.1(d) To suit 1000kVA rectangular substation 3 Complete substation 3.1(a) 22kV/433-250V, 200kVA, 3 Ph, 50 Hz, ONAN,

with LV Switchgear and HV SFU (1 x switch disconnectors and 1 x fuse switch). (Rectangular plinth nominal size 1310mm x 3700mm),





20. Attachment 4 – Risk Assessment

The Tenderer shall complete the relevant items (as applicable): REF. PARTICULARS RESPONSE

1. Have Risk Assessments been carried out on equipment tendered which meet the requirements of AS/NZS 4360 (Yes/No)

2. Have copies of such risk assessments been included with the tender (Yes/No)

3. What is the weight of the components to be moved (for example - cable box covers/drawout circuit breaker trucks)?

4. How often do the components have to be moved?

5. Are space restrictions associated with:

5.1 Manual/materials handling tasks

5.2 Installation/maintenance

5.3 Operating procedures?

6. Is there provision for the use of mechanical lifting devices?

7. Is the load stable?

8. What is the level of coupling? (poor/fair/good) (e.g. are operating handles fitted with grips)

9. What are the push/pull/rotational forces required to operate the equipment:

9.1 When new?

9.2 During life expectancy?

10. Do "above ground" work surfaces have adequate fall protection (e.g. slip resistant surface, hand rails)?

11. Do the work positions require undesirable postures such as:

11.1 Bending

11.2 Stretching

11.3 Twisting

12. What postures are required to be sustained over what period of time?

13. What movements are repetitive and for what duration?

14. What are the sound pressure levels (expressed in dB(A))?

15. What hazardous substances are used/produced (including after failure) such as:

15.1 Dust

15.2 Gas

15.3 Fume

15.4 Emissions

15.5 Mist




RISK ASSESSMENT (CONT'D) REF. PARTICULARS RESPONSE

15.6 Liquid

15.7 Solids

16. Are the hazardous substances controls compatible with normal operational requirements?

17. Is a Safety Data Sheet for all hazardous substances provided?

18. What are the expected hazardous changes/by-products associated with the deterioration of a substance?

19. Is there any possible contact with energised components?

20. What are the levels of radiation emitted?

21. When in service, are any normally accessible areas hot/cold enough to be a hazard?

22. Are there any biological hazards?

23. Are there any mechanical hazards (e.g. nip in points, exposed moving components)?

24. Are mechanical hazards appropriately controlled (e.g. guarding, lock-outs)?

25. Are load limits established and clearly identified?

26. Are gauges clearly visible and easily interpreted?

27. Are control movements consistent with established Australian conventions (e.g. switch "UP" position is "OFF")?

28. What is the degree of whole body or hand/arm vibration? (Hz)

29. Are projectiles generated?

30. Are special tools required/identified/supplied?

31. What are the hazards associated with equipment failure?





21. Attachment 5 – Technical Document Checklist

This schedule details parameters referred to within the body of the specification for which a response by suppliers is requested. This schedule shall be completed and submitted with the offer. Copies of certificates etc are to be provided in electronic format, e.g. “pdf”. Has the following information been provided with the tender documentation?

PARTICULARS CLAUSE ANSWER(Yes/No)

Drawings of all items Tendered 15.1 Any limitation to loading above “normal cyclic” 5.4 The tenderer shall supply full identification of the transformer oil offered 5.10 Are transformer LV terminals mounted such that EMFs associated with the equipment are minimised

5.14 and 14.2

Details showing the lifting points for lifting by crane and forklift, including SWL rating of thecrane/forklift and procedures recommended

5.16.2

The supplier shall specify the make and type of cable terminating kits available

5.17.2

The tenderer shall indicate the recommended operational procedures 5.17.4.2 (f) Documentary evidence to demonstrate that the Tenderer’s manufacturing facility employs "best practice" SF6 handling procedures

5.17.4.2 (h)

Details of the “full range” fuses suitable for use with the switchgear 5.17.5 Effect on fuse operation at elevated ambient temperatures 5.17.5 The tenderers has submitted details of equipment modifications required and the additional components needed to be retrofitted to achieve remote operation capability

5.17.6 and Attachment 1

The maximum heat dissipation allowable inside the fuse holder in the Attachment 2 - Guaranteed Particulars

5.17.7

Submit full details of test devices offered 5.17.9 Has the Tenderer commented on the EMFs associated with the equipment offered

5.19.1

Full details of cable connections 5.19.1 Has the Tenderer submitted an alternative method of connecting an alternator to the LV switchboard

5.19.7

Evidence supporting the performance of coating system. 5.23 Details of protective coating repairs 5.23 Type test certificates 6.1 Type test certificates for CTs 6.10 Risk assessment documentation 7 &

Attachment 4

QA Certification of Supplier and Manufacturer. 8 Availability of samples for evaluation 9 Service history details and contact names and telephone numbers 11 Reliability information 12 Availability of training materials 13




PARTICULARS CLAUSE ANSWER(Yes/No)

Comments on environmental soundness of equipment and MSDS for chemical substances

14.1

Availability of drawings and Manuals as required 15.3/ 15.4 Completed Attachment 2 15.1 Completed Attachment 3 15.1 /

Attachment 3





22. Attachment 6 – Drawings


































Documents

Ergon Energy Corporation Limited · 2015-08-06 · Technical Specification for 24kV Padmounted Substations Page 2 of 84 Specification ETS02-02-02 Ver 10 Ergon Energy Corporation Limited