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PARADIP PORT TRUST
INVITATION OF BUDGETARY OFFER
FOR
“Revamping of 11 KV HT Electrical Distribution Systems at different locations of
Paradip Port.”
SUBMISSION OF BUDGETARY OFFER
ON OR BEFORE Dt.09/04/2019.
EXECUTIVE ENGINER (ELECT.)
PORT ELECTRICLA DIVISION – II
PARADIP PORT TRUST,
PARADIP, JAGATSINGHPUR,
ODISHA – 754142
Contact No.9777180842
Email Id: [email protected]
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REQUEST FOR BUDGETARY OFFER
(A) GENERAL INFORMATIONS:
Sl. No. Item Details
1. Name of Work Revamping of 11 KV HT Electrical Distribution Systems at
different locations of Paradip Port.
2. Department / Organization ELECTRICAL & MECHANICAL DEPARTMENT /
PARADIP PORT TRUST
3. Executive Division Port Electrical Division.
4 Officer Inviting the Offer Executive Engineer
5. Immediate Next Authority Superintending Engineer
6. Sanctioning Authority Dy. Chairman, PPT
7. Executing Authority Executive Engineer
(B) OTHER INFORMATIONS:
Sl. No. Item Date Time
1 Publication date 16.03.2019 17:00 Hrs.
2.a) Document download start date 16.03.2019 17:00 Hrs.
b) Document download end date 09.04.2019 17:00 Hrs.
3.a) Start date for seeking Clarification on-line 18.03.2019 17:00 Hrs.
b) Last date for seeking Clarification on-line 27.03.2019 17:00 Hrs.
4. Date of uploading response to Clarifications sought 06.04.2019 17:00 Hrs.
5. Offer Submission end date 09.04.2019 17:00 Hrs.
6. Offer Validity period 120 days
7. Currency of Offer Indian Rupee
8. Language of Offer English
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Budgetary offer
Name the work “ Revamping of 11 KV HT Electrical Distribution
Systems at different locations of Paradip Port.”
SCOPE OF WORK
Paradip port intends to revamp the existing HT electrical distribution system to increase
the safety & reliability of electrical system as well as smooth maintenance & operation of
electrical switch gear. Paradip port invites the budgetary offer from the Electrical
contractor, Authorized agency or Manufacturer for the subject work as per the BOQ &
scope of work, as mentioned below.
1.1 SUPPLY OF EQUIPMENT The contractor shall supply INDOOR metal clad partitioned, 11 KV, SF6 gas
insulated floor mounting switchboard panel (GIS Panel) conforming to IEC-
62271-200/100. The switch board panels shall comprise incoming feeder,
outgoing feeder, transformer feeder and bus coupler. The SLD of GIS panel of
each substations are herewith attached in Annexure-A,B,C &D. Accordingly
the supplier or manufacturer shall supply the GIS panel as per PPT‟s requirement.
The GIS panel shall be equipped with 12 kV vacuum circuit breakers,
disconnector with earthing switches as required on the bus-bar side, voltage
transformers, current transformers, metering instruments, numeric protection
relays, terminal ends for 12 kV incoming & outgoing cable feeders etc.
1.2 TESTING, ERECTION AND COMMISSIONING The scope also include the installation, testing & commissioning of 11KV SF6 gas
insulated switchboards Panels at distribution substations along with inter
connection/inter-panel wiring of 11kV VCB panels as well as 11kV terminal ends
jointing/connection with 11kV cables in incoming ,transformer feeder and 11kV
VCB outgoing feeders panels. 11kV Gas Insulated Metal Clad Switchgear shall be
complete with all the accessories for efficient and trouble free operation. The
equipment offered shall be safe, reliable and compact to install. The workmanship
shall be of high order. The circuit breakers, switches and protective devices etc.
shall be of high order. The circuit breakers, switches and protective devices etc.
shall be of latest design so as to ensure rapid and efficient interruption of fault
current low arc energy, small arcing time, three-phase copper bus bar system and
free from fire hazards.
2. CODES AND STANDARDS Switchgear shall be designed, manufactured and tested in accordance with the
latest applicable sections of the IS/ IEC standards.
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3. ELECTRICAL SYSTEM
3.1 11 KV voltage supply will be 3 phase 50 Hz.
3.2 A.C. supply at the 11KVsub-station will be 415/240 volts, 3 phase, 4 wire, and
50Hz+3% variation.
3.3 The contractor shall have to supply power supply unit( DC 110 volt unit), which
shall be tapped from 110 volt AC PT source.
4. Construction
4.1 GIS panel shall be an indoor gas insulated and metal-clad cubicle design with single
bus-bar system in accordance with single line diagram and data sheet. Each panel
shall be metal enclosed, free standing, floor mounting, flush fronted and arranged
to form a single structure with a common bus-bar assembly. Each compartment
shall be protected by a metal enclosure with enclosure rated IP65 minimum for
gas compartments and IP4X for the supporting frames, low voltage and other
compartments. Construction, including cable entry, shall be vermin proof.
4.2 Switchgear Cubicles must be made up of stainless steel/CRCA with powder coating
enclosures completely segregated one from the other, containing the power
parts of the cubicles. (Protected by Zinc Phosphate for corrosion proof).
4.3Power parts boxes must be made up of stainless steel metal, with a minimum thickness
of 2.5mm, pressed bent and welded or casted, filled up with SF6.
4.4By Design there should be no need for Gas works during the whole time on site, not
even for exchanging a centre panel or extending the switchgear at later stage, eg. No
gas Handling shall be necessary during the anticipated service life of the switchgear.
The low voltage compartment, the panels and doors must be made up with a pressed
bent CRCA metal sheet with minimum thickness of 2mm.
4.5Switchgear shall be arranged to permit future extension at both ends without any gas
work at site.
4.6GIS Switchgears shall be partitioned both between the busbar connection & Circuit
breaker and from panel to panel.
4.7Within the various GIS cubicles, the following typical compartments must be
identified.
A. Bus bar connection compartment, containing the bus bars connection with
Circuit breaker compartment (in SF6 gas enclosure)
B. CT Compartment
C. Cable/TS compartment
D. Operating mechanism compartment, containing the circuit breaker
operating mechanism.
E. Low/voltage compartment, containing instruments, protection relays and
auxiliary devices.
4.8 Switchgear shall be designed such that all high voltage parts (including busbars, core
module with built in circuit breaker etc.) shall be located in an insulating inert gas.
Cable termination compartment shall include provisions for conventional CT, PT plug
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in connections. Low voltage compartment shall include built in switch drives and
secondary equipment.
4.9The structure, including doors and panels, shall be capable of withstanding the internal
pressures created by faults within the structure (equal to the maximum fault current
rating without danger to the operating personnel. Active and passive protection
system against internal faults in each partitioned panel shall be provided for the safety
of operators. In case of internal fault, the detection system shall open all circuit
breakers with 100ms. Pressure detection shall be effected by intelligent gas density
monitor with sensors. A passive safety section shall ensure that hot gases shall be
guided via pressure relief disks/ducts from each compartment connected. The pressure
relief ducts ends shall be guided to open air or fitted with absorbers to cool the hot
gases. Relief into cable basement or cavity below a false floor is not acceptable.
Hazards to person or risk of fire shall be reliably prevented. Temperature-
compensated sensors for pressure measurement shall also permanently monitor the
relevant gas compartment. The entire system shall be monitored with aid of sensors. It
shall be possible to schedule maintenance operations from this monitoring system.
Structure shall be provided with barriers to prevent the transfer of ionized gases
between two adjacent compartments except bus chamber.
4.10An arcing fault in one compartment should not cause major damage to other
compartments. Separate relief vents shall be provided in bus bar, cable and circuit
breakers compartments to release arc fault pressure quickly and safely. Type test
reports regarding internal arc withstand performance shall be available with offers.
The test supply source shall have a fault capacity equal to the switchgear fault rating.
The product shall be tested for the minimum standard required which is detailed in
IEC 62271.
4.11Structures shall be self-ventilating. Switchgear shall be designed and constructed to
facilitate inspection, cleaning, repair and maintenance and to ensure absolute safety
during such works. Interlocks, bus-bar shutters and covers shall be provided to
prevent incorrect or unsafe operation and to prevent access to live parts. It shall be
possible to work safely within individual panels, such as equipping and
commissioning of spare panels as well as connecting main, control and auxiliary
cabling, while the remainder of the switchgear is energized.
4.13Similar parts and components shall be interchangeable wherever practical. An
interlock system shall be provided to prevent the interchange of modules with higher
current rating with modules of lower current rating. Replacement of circuit breaker
module shall be without interfering bus-bar operation and without gas work.
4.14Equipped and unequipped spare and space panels shall be provided as specified on
the single line diagram. Any non-equipped (except earthing switch) spare panels
shall be arranged such that they can be fully equipped without de-energizing the
switchgear.
4.15All covers plates that exceed 0.7m.sq. that require removal for installation or
maintenance of the equipment shall be equipped with lifting handles and self-
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supporting lips. With the exception of the backs of panels cover plates shall not
exceed 1.1 m.sq. in area or 27 kg in weight unless they are hinged and bolted or
locked. Cover plates shall be secured using captive bolt fixings.
4.16All doors, hinged covers, and hinged panels larger than 0.36 m.sq. in area shall open
at least 95 degree and be equipped with doorstops to hold them in the open position.
Door swing must allow with-drawable equipment to be withdrawn. All such doors
and hinged covers shall be equipped with handles and secured by captive bolts,
lockable with a key or pad lockable.
4.17Operating devices, handles, push buttons, lamps and indicating instruments shall be
located above 0.3 m and below 2.2 m from the finished floor levels unless otherwise
agreed.
4.18The Contractor shall provide/supply the foundation channels on which the GIS is to
be mounted. The provision for any further extension in the GIS shall be taken into
consideration while supplying and designing the foundation frames.
4.19The design of mechanisms shall allow maintenance of the switching device and if
this requires manual closing or opening ( sometimes known as slow closing and
opening) the facility shall be provided such that it is not possible in the service or
earthing condition unless each operation requires a manipulation different from a
normal operation. Interlock mechanisms shall be mechanical and manual operations
shall be provided with labels that give clear instruction and are readily visible.
4.20Each circuit shall be provided with test facilities to allow for;
• Voltage testing of the circuit with all parts connected to the facility compatible
with the full test voltage for cables that can be connected to the switchgear.
• Protection testing capable of continuous operation at a maximum current.
Access specifically for test devices shall be clearly identified and covers shall be
secured using captive fixings that require the use of a tool for access. Provision
shall be included to secure the test devices in the position.
4.21 A pressure indicator shall be provided and include a set of changeover contacts that
operate when the pressure falls to the minimum operational pressure.
4.22 Quick acting filling couplings shall be provided for compartments suitably arranged
to avoid inadvertent gas loss. Couplings shall be corrosion resistant and suitable for
use with the fill gas.
4.23 Each panel shall have an air-insulated cable connection compartment and a low
voltage compartment. The cable connection compartment shall contain the cable
sockets accessible for fitting of the power cable plugs and the test cable sockets,
which shall also accommodate the plug in voltage transformers if applicable. The
low voltage compartment shall contain the switch operating mechanisms and all
secondary equipment including the protection and control system. All operating
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mechanism shall be motorized. Manual emergency operation and mechanical
position indicators shall also be provided. The access to LV compartment door shall
be separate than Circuit breaker/Cable door.
4.24Door operated ON/OFF Lamp shall be provided for every compartment (LV
compartment Cable, Compartment).
4.25The circuit-breaker and bus-bar compartments of each panel shall be autonomous,
gas-filled clad compartments with no gas line inter-connections between panels.
Each of these gas-filled clad compartments shall be monitored separately. The actual
gas pressure state has to be selectively visible without opening of doors or any other
operation. An active of-information should be included.
4.26By design there should be no need for gas works during the whole time on site, not
even for exchanging a centre panel or extending the switchgear at later stage, e.g. no
gas handling shall be necessary during the anticipated service life of the switchgear,
under normal operating conditions. (The gas-filled clad compartments are to be
designed to be maintenance-free and hermetically sealed pressure system in
accordance with IEC 62271-200).
4.27The switchgear units shall be divided into several gas-filled compartments, sealed
from each other by gas-tight partitions including bus bar compartments of two
adjacent panels, so that any leakage may be quickly localized and limited within
enclosure of one panel & can be indentified immediately. All the live parts including
the main bus-bar shall be encapsulated in stainless steel enclosure filled with SF6
gas.
4.28It shall be possible to conduct all mechanically operations - ON – OFF of
CB/Isolator/ES from panel front without opening any doors or covers. A mimic cum
operating facia-mechanically interlocked directly with the mechanism shall be
provided.
4.29 All PTs shall be provided either direct plug in type or with isolator to disconnect
the same while in operation.
4.30 The pressure of SF6 gas inside shall be more than 1.3 bar. The switchgear design
shall be such that even at 1 bar (Atmospheric Pressure) the basic insulation levels
as specified can be maintained. The current rating of the feeders shall be
maintained at this stage.
4.31 The power parts contained in the different stainless steel/ CRCA boxes must be
electrically connected through bushing type insulators, in order to perform the
sealing and segregation.
4.32 All mechanical operating and maintenance producers shall be performed from the
front, without opening the front door for enhanced operator safety.
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5. Internal Arc
5.1 Classification to IEC 62271 -200
5.2 Partition class PM
5.3 Internal arc classification – AFL (for the panels with no rear access required).
Internal arc classification – AFLR (for the panels with near access required).
5.4 IAC-A FLR as per IEC 62271-200, shall withstand 26.3 kA for 1 sec. Complete
with duct for exhaust gas to be taken out of the substation of IAC AFL if
switchboard has a provision of flush mounting with rear wall.
5.5 Every switchboard shall be constructed in order to support the mechanical stress
due to maximum pressure value of the gasses produced by the arc.
5.6 The switchboard shall be designed to withstand the maximum short circuit current
up to 3 sec to meet the protection coordination needs. Under fault conditions there
must be no emissions of gas and or materials hazardous for service personnel.
6. Circuit Breakers
6.1 Circuit breakers shall be vacuum type in SF6 type atmosphere in accordance with
IEC 62271-100. Circuit breakers shall be equipped as following:
• With stored energy spring mechanism for motor charging and emergency manual
operation.
• With mechanical push button for closing and opening. The “Close” pushbutton
shall be covered by a removable plate or suitable.
• With mechanical indicators for switch position and mechanism position.
• With shunt release Closed.
• With shunt release OPEN.
• Detection of position is to be performed by mechanical position indicators.
• With Anti-pumping devices in circuit breaker closing circuit.
• With surge suppressers.
• Manual opening/closing mechanism.
• Electrical opening/closing mechanism with spring-loading gear motor.
• Auxiliary Contacts.
• Key lock.
• Operation Counter
6.2 Circuit breaker shall be interlocked with disconnect/earthing switch.
6.3 The operating mechanism of the circuit-breaker shall be free release, with pre-
charged closing springs, motor/manual operated type. The closing and opening
operations must be independent of the operator action, Re-closing locking device
must be provided.
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6.4 Circuit breakers shall be provided with trip circuit supervision to monitor trip
circuit continuity and trip circuit supply. Alarm and indication facilities shall be
provided for each circuit breaker and a volt free group contact provided via
internal bus wiring for remote common alarm.
6.5 Circuit breakers shall be provided with a minimum of six normally open and six
normally closed spare, auxiliary contacts wired out to terminals. Any additional
contact requirement shall be stated on the single line diagrams and/or data sheets.
6.6 In addition, auxiliary contacts (TOC) shall be provided for circuit eathed and
busbar earthed.
6.7 Mechanical position indicators shall be provided to show circuit breaker
position.
6.8 A single line circuit diagram shall be included on the front of the panel indicating
all primary electrical connections and their operating position.
6.9 Each circuit breaker shall have two trips coils, facility for Manual Emergency
tripping.
6.10 The breakers shall be capable of making & breaking the short time current in
accordance with the requirement of IEC 62271-100 and latest amendment thereof.
The continuous current rating of breaker 630 A for incomer , transformer feeder
& outgoing feeder.
6.11 Comprehensive interlocking system to prevent any dangerous or inadvertent
operation shall be provided. Isolation of circuit breaker from bus bar or insertion
into bus bar shall be only be possible when the breaker is in the open position.
6.12 Two stage gas density alarm and lockout system with local and remote indication
shall be provided.
6.13 The circuit-breaker has to control at least 10,000 Make-Break cycle (One
operating cycle of making & Breaking) operations at rated current or 100 breaking
operations at rated short-circuit breaking current without maintenance. The
mechanical life of the vacuum interrupter has to comprise at least 10,000 operating
cycles.
6.14 The operating mechanism must be maintenance-free without time limit up to
10,000 operating cycles.
6.15 The circuit breaker operating mechanism must be accessible for maintenance with
no operations on SF6 compartments.
6.16 Testing certificates shall be provided with the switchgear to enable ascertaining of
timing of the circuit breakers operations. All details of the test facilities/ setup
available to this respect shall be submitted with the tender.
6.17 Technical parameters of the breakers :
a) Nominal System
Voltage
11 KV ± 10%
b) Highest System 12 KV
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Voltage
c)No. of phases &
frequency
Three phase, 50 Hz ± 5%
d) System earthing Solidly earthed
e) Circuit breaker rating
i) Continuous current
rating at 45 Deg. C:
ii) Short circuit rating for
3 sec:
iii) Dynamic system
stability:
iv) Duty Cycle:
v) Breaking Current:
AC
Symmetrical :
AC
Asymmetrical:
viii) Auxiliary Voltage:
630 A
18.4 KA
46 KA
O-3 sec-CO-3min-CO
18.4 kA
As per IEC / IS
Closing: 110 V DC (85% - 110%)
Tripping: 110 V DC (70% - 110%)
Spring Charging: 240 V AC
(85% - 110%)
f) Bus-bar Rating 630 A, 18.4 KA (3 Sec.)
g) Power frequency
withstand
28 KV rms for 1 min.
h) Impulse withstand
voltage
75 KV (rms)
i) Control Voltage 110V DC.
j) CT Ratio Secondary current (1 Amp.)
k) PT Ratio 11000 / 110
3 3
l) DC Control
Voltage:
Service Voltage:
110 V DC (85% - 110%)
415 V + 10%, 3 Ph, 4 Wire 50 Hz + 5%
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7. Isolators and Earthing Switches:
7.1 Isolators or isolators combined with earthing switches (switches- Open, Close
Earthed) shall be motor operated. In cases of emergency, Manual operation must be
possible.
7.2 The earthing position of all 3 phases must be visible via a mechanical position
indicator (MIMC) directly connected to the drive shaft on panel front Fascia.
7.3 The mechanical operation of isolator / disconnector switch must be possible with
door closed for operator safety.
7.4 The interlocks shall be provided as per standards
8 Bus Bars :
8.1 Bus bars and connections shall be manufactured from hard drawn copper.
8.2 Bus-bar system must be three-phase, sized to support short-circuit currents of 18.4
kA for 3sec. Bus bars shall be tubular/ Flat type in construction and shall be bare
and insulated with SF6 gas only.
8.3 Rating of Bus bars shall be 630A.
8.4 The phase bus-bars shall be enclosed in individual or a combined gas filled
compartment. Provision shall be made at the bolted connections to enable
accessibility for maintenance and extension.
8.5 Bus bars shall be of the same cross sectional area throughout the length of the
switchgear panel.
8.6 All bus bars and cable connections shall be marked to indicate the phase colouring,
which shall be red, yellow and blue unless otherwise specified or explicitly
precluded by relevant national standards.
8.7 An earth bus bar, sized for the earth fault rating of the electrical system and
switchgear, shall be provided along the full length of the switchgear structure.
8.8 Its cross sectional area shall be, as a minimum that of the site earth cable connection
as specified on data sheets. The earth bus-bar shall have the provision for earth cable
connections at each end.
8.9 All phase and earth bus bars and connections shall be sized, braced and supported to
withstand the dynamic, di-electric stresses and thermal affects resulting from the
switchgear rated short circuit current over the full length of the switchgear and carry
certification from a recognized Testing Authority.
8.10 Bus-bar couplings between adjacent panels should be designed with a minimized
quantity of electrical sealing joints.
8.11 11kV GIS shall be able to withstand rated voltage even if SF6 gas in any of gas
insulated compartments leaks to atmospheric pressure.
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9 Earthing: 9.1 All metallic non-current carrying parts of the switchgear shall be bonded together
and connected to the switchgear earth bus-bar. The frame of each unit and each
device requiring earthing shall be connected directly to the earth bus-bar. For direct
connection to the station earthing bolts of at least 10mm shall be provided at both
ends of the main earth bar.
9.2 An earthing conductor extending the whole length of the switchboard must be
provided. The current density in the earthing conductor, if made of copper. Must not
exceed 200 A/mm2 under the specified earth fault conditions.
9.3 An integrally mounted earthing switch, capable of carrying the prospective short
circuit current, and suitable for local, manual operation. shall be provided on all HV
switching devices. It shall only be possible to close the earthing switch when all
bus-bar disconnector are open. Circuit earthing device shall be arranged for local
and manual operation only. Mechanical indicator shall be provided, showing
position of earthing switch: close/open. Padlocking facilities for locking the earthing
device in the open and close position shall be provided.
9.4 Integral earthing shall be provided on feeder/incoming circuit breakers for cable
earthing, and on incoming or bus coupler circuit breakers for bus-bar earthing.
9.5 Mechanical and electrical interlocking shall be provided to prevent earthing of an
incoming supply which has not been isolated and switching on an incoming supply
which is earthed; to prevent earthing of feeder circuit when the circuit breaker is in
the closed position or switching on a circuit breaker when the circuit breaker or
feeder is earthed.
9.6 Withdrawable parts shall be effectively earthed until they are completely withdrawn
with all power and control connections disconnected.
9.7 Provision shall be made, adjacent to the cable termination, for connecting earthing
cable armouring to the earth bus-bar.
9.8 Clear instructions, preferably pictorial, shall be provided showing methods of
earthing.
10.9 All the main components (such as CTs, PTs, relays. instruments etc.) must be
connected to earth.
10 Interlocks:
(Electromechanical or software based interlocks is acceptable).
10.1 The switchboard must be fitted with all the interlocks needed to prevent incorrect
operations which may jeopardize safety of personnel in charge of operating the
installation, as well as the efficiency and reliability of the apparatus.
10.2 In particular, the following mechanical interlocks at least must be provided to
prevent;
i. Operation of busbar if the circuit breaker is closed.
ii. Operation of circuit-breaker during busbar isolator operation.
iii. Closing of the earthing switch when busbar isolator is closed.
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10.3 The following interlocking dependencies must be provided;
• Limit position blocking of the switching devices.
• Interdependence of disconnector with earthing switch in the same panel.
• Interdependence of the circuit breaker and the earthing switch in the same
panel.
• Dependence of the disconnector/Circuit breaker on the bus coupler circuit
breaker and vice versa.
10.4 The basic interlocking between disconnector switch and circuit breaker may be
achieved by auxiliary contactor/aux relays/other mechanical control equipments.
The interlocking logic shall be operational and shall be foolproof and independent
in the event of relay failure for operator's safety.
11. Secondary Wiring:
11.1 Secondary wiring shall be 1100v grade PVC or XLPE insulated with stranded
copper conductors. Minimum cross sectional area for cables shall be 1.5 mrn.sq.
except instrumentation wiring. Wiring for CTs and VTs shall be a minimum of 2.5
mm.sq.. Wiring shall be flame retardant and suitable for the temperature envisaged
during operation.
11.2 Secondary wiring within the switchgear shall he securely held in position (either
loomed or run in conduit/trunking) and be firmly clamped at both ends to prevent
movement at terminations. Where wiring enters or passes through compartments
containing high voltage apparatus, it shall be run in earthed continuous metallic
conduit/trunking without gaps, holes or joints. SELLER shall adequately size all
internal conduit/trunking for internal and field cabling and wiring as necessary.
11.3 Secondary wiring layout shall permit alterations to individual circuits without
requiring shutdown of the complete switchboard.
11.4 Bus wires for closing, tripping, control, indication, heaters etc. shall run within the
switchgear.
11.5 Separate fuses/MCBs shall be provided for each control, indication and protection
circuit for each breaker.
11.6 Wiring identification shall be by numbered and/or lettered interlocking ferrules,
of insulating material adjacent to the terminals and shall be correctly orientated
for reading. They shall be indelibly marked and removal without disconnecting
the wire from its terminal shall not be possible. Seller shall allow sufficient wire
length to facilitate some re-identification of wires without causing new wire to
be run as terminal is cut off, shortening wire and installing new terminal.
11.7 Flexible cables shall be used for connections to door mounted equipment.
11.8 All wiring for external connections shall be brought out to individual terminals
on a readily accessible terminal block.
11.9 All the conductors of the circuits regarding apparatus contained in the switchgear
must be terminated at numbered modular terminal boxes
11.10 The tightening of the terminals in the clamp must be of the anti vibrating type for
connection on the customer side.
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11.11 The terminals boxes for connections with cables outside the switchboard must be
sized to allow fixing of a single conductor to each terminal. There must also be a
number of additional terminals equal to 5% of the number of terminals used.
12. Cable Terminations:
12.1 Power cables shall be bottom entry, unless specified otherwise. Facilities shall be
provided for cable testing and current and voltage injection. A socket/bushing
and plug assembly shall be provided for the power cables. Cable sizes for the
incomers and outgoing feeders shall be provided by PPT
12.2 GIS panel should be suitable for power cable of size up to 2 runs of 3 core 185
mm.sq. or 300sqmm or 70sqmm.
12.3 Connections for power cables shall be plug in type/push on, according to DIN
47637 outer cone type as per relevant IEC.
12.4 Cable terminating facilities and terminals shall be for the specified cable type,
gland and conductor size. The contractor shall design terminal arrangement,
cable boxes / cable management systems to allow necessary space for cable
bending, application of earth connections onto screen/shield tapes, installation of
cable stress relief elements and accurate dimensioning of gland plates.
12.5 Terminal blocks shall be arranged and positioned to afford easy access for
carrying out external cable termination, testing, inspection and maintenance.
There shall be clear space allowed between the terminals and the gland-plate for
the spreading and termination of external conductors.
12.6 Terminal blocks shall be mounted in a single deck arrangement in a common
area such as wire ways as far as possible.
12.7 The panel wiring shall be on one Side of the terminal block only. No more than
two wires shall be connected to a terminal.
12.8 Terminal blocks shall be shrouded or provided with transparent covers. Pinch
screw type terminals are not acceptable.
12.9 Terminals for different voltages shall be separated by partitions. CT wiring and
control wiring shall not be on the same terminal stripe.
12.10 A terminal box or chamber with un-drilled gland plate or entry panel of sufficient
dimensions to terminate the specified cables shall be provided.
12.11 Positioning of cable terminations shall avoid obstruction of other cable
terminations; removable covers etc. and provide for easy access for terminating
cables.
12.12 Cable supports shall be provided (where practicable) by the contractor to avoid
undue strain on the cable termination.
12.13 Separate terminal arrangements shall be provided for each panel and for power
and control cables.
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12.14 With the cables connected, cable tasting shall not require the installation of any
supplementary equipment.
12.15 The connecting of the 11 kV-cables in the panels only shall be occurred with
bottom cable plug or right angle connectors. Those cable plug or right angle
connectors shall be in the scope of supply of GIS manufacturer.
13. Auxiliary Supply:
13.1 Auxiliary supplies (control, protective devices- indication. heaters. etc.) shall be in
accordance with the single line diagram or as specified elsewhere.
13.2 Circuit breaker tripping, control and indication power supply 110V DC will get
from own PT through rectifier. The Contractor shall specify required standing
load, peak load and permissible voltage variation at the time of proposal.
13.3 All auxiliary supplies shall he individually fused/MCB protected within each
circuit breaker housing.
13.4 Incoming auxiliary supplies shall be fused/ MCB protected at the point of entry to
the switchboard. The contractor shall ensure discrimination with individual circuit
protective devices.
14. Potential Transformer (PT) and Current Transformer (CT):
14.1 Voltage and current transformers shall he provided as given technical specification
in the panel by the contractor.
14.2 The secondary windings of CT &PT shall he earthed at one point through a
removable link, with provision for attaching test links.
14.3 The current transformers, Inductive type, shall be in accordance to IEC 60185,
IEC 60044-1 read with latest revisions and the general requirements as detailed in
foregoing pares of specification. The current transformers shall be toroidal core
cast resin type and shall comply with the ratings indicated in the single line
diagram. They shall be toroidal core cast resin Low tension type and shall be
located inside/outside the gas compartment. The secondary wiring of 2.5 Sq.mm.
shall be taken out to the LV compartment via bushings.
14.5 The potential transformers shall be in accordance to IEC 60185, IEC 60196.
IEC60044-3 read with the latest revisions and general requirements &
specification. Easy access to Voltage Transformers should be possible from front
side of GIS.
14.6 Epoxy encapsulated / Metal enclosed Voltage Transformers Single Pole insulated
PTs which can be simply and safely changed shall be used exclusively. They shall
be Plug in type / withdrawable type and mounted outside the gas compartment for
better accessibility and maintenance.
Page | 16
14.7 To allow this switchboard with the primary directly plugged to the line. A
manually operated isolator has to be installed to enable disconnecting of the bus
voltage transformer from line for partial discharge and cable testing.
14.8 Current transformers shall be rated to withstand the thermal and magnetic stresses
resulting from the maximum available through fault current, the momentary and
time rating requirements same as that of the switchgear.
14.9 The contractor shall provide calculations together with current transformer
magnetization curves to prove the through fault stability of the protection up to the
switchgear fault rating.
14.10 Secondary terminals of current transformers and voltage transformers shall be
wired to disconnecting type terminal blocks, located at an accessible place in air
filled low voltage compartment. The CT TBs shall be provided with short-
circuiting links for each CT shorting and connection to earth. Alternatively,
facilities for testing the CTs shall be provided by means of separate test blocks
associated with each set of CTs. Each CT connection to the TBs shall be provided
with ring type lugs. All wiring shall be colour coded.
14.12 transformer nameplates shall be fixed in a position so that details can easily be
read when fitted in the cubicle.
14.13 Bus bar voltage transformers shall have provisions for safely disconnecting the
fuses and transformers from energized bus. Where plug in withdrawable types are
used shutters shall be provided to automatically seal off the high voltage spouts
when the transformers are withdrawn.
14.14 Accessible test links and terminal shall be provided on the front body of the panel
14.15 The contractor shall supply the CTs for O/G and I/C & BC panel as per the
technical specification
11kV Incomer, O/G and bus coupler panel
a. Current Transformer Technical Parameters
Core-I Core-II
i. Purpose metering protection
ii. Primary Current
rating
300-150 Amps 300-150 Amps
iii. Secondary
Current rating
1 Amps 1 Amps
iv. Rated Burden 5 VA 5VA
v Accuracy Class 0.2 5P
vi Accuracy Limit
Factor
10 20
Page | 17
b. Potential Transformer Technical Parameters
Voltage ration (a). Rated
primary
voltage(kV)
rms)
11kV/√3
(b)Secondary
voltage ;
110V/√3
Rated Voltage factor 1.2 continuous
and 1.5 for 8hr
seconds
One minute power frequency
withstand voltage for secondary
wiring (kV rms)
3.0KV
Method for earthing the system
Solidly earthed
15. Metering protection, Control and indication:
15.1 Metering protection and control shall be provided as shown on the single line
diagram.
15.2 Meters and relays shall be capable of withstanding, without damage the secondary
currents associated with the maximum available through fault current same as
switchgear rated fault current. External zero adjustment shall be possible to
facilitate adjustment without dismantling the instrument.
15.3 Protection and metering devices shall be flush mounted, where possible shall be
withdrawable. Mounting shall he such that panel vibration caused by switchgear
operation or people humping against the switchgear, will not cause relay
operation. The dimensions of flush mounted devices shall not impede the door
opening over its full swing. Each protection relay including inter trip relays, shall
latch in operation, require manual resetting, provide clear flagging of operation
and have separate contacts for each trip function and for alarming.
15.4 Protective relays shall be of the solid state, microprocessor-based programmable
type with serial communication facilities and be of the interrogation/set point
adjustment (password protected) via a Buyer provided laptop computer. Relay test
and setting software, using Windows operating system including interface leads,
shall be provided. Current transformer terminals shall be automatically short-
circuited when the clays are withdrawn.
Page | 18
15.5 Protective relays shall have hand-reset facilities and clear operation indication, e.g.
LED. Non-tripping relays may be self-resetting if an indication of operation
remains until hand reset
15.6 Protection relays shall be fully configured as per requirement. Configuration shall
provide the functionality detailed in the single line diagrams and elsewhere
15.7 When indicated on the single line diagram, datasheet or elsewhere relays with
multiple trip and alarm functions shall have separate operating contacts for each
function wired out to separate terminals.
15.8 Block for injection testing of relays and measuring devices shall he provided on
each panel. Current injection test blocks shall be provided with short circuiting
links.
15.9 Relay shall have front RS232 / USB port for communication to a local PC with
rear RJ45 port for connection to remote operation on IEC61850 protocol without
any external convertor.
15.10 Relay shall have facility to create built logics and interlocks.
15.11 Relay shall be provided with a MIMIC display and key pad for navigation and
setting.
15.12 Relay shall display on-line value of current & voltage (only for directional relay).
15.13 Relay shall have circuit breaker failure protection built-in.
15.14 Relay shall have 3 phase directional over current and earth fault protection. It shall
have three stages with first stage programmable as IDMT or DT. The second and
third stages shall be programmable as DT or instantaneous.
15.15 Relay shall have 4 shots auto reclose function built-in
15.16 Relay shall have minimum 10Digital Inputs and 8 Digital Outputs including
Watchdog contact.
15.17 For Bus coupler, inbuilt check synchronization in the relay to be offered.
15.18 Relay shall have under and over voltage protection for Incomer Panels.
15.19 Indication lamps (green-open, red-closed, amber-tripped, blue-trip circuit healthy
plus Service Position, and Circuit Earthed) shall be provided for each circuit
breaker. Status of spring charging mechanism (Charged or Discharged) and
positive drive mechanical position indicators, visible without opening the cubicle
door, shall be provided for each circuit breaker. Volt-free contacts for remote
indication shall be provided. Indications may be incorporated in the
15.20 All relay should be numeric type. Protocol for all relays should be same
(IEC61850 or latest amendment). All the relays should be interconnected with
goose messaging.
15.21 Control of circuit breakers shall be carried out from a control switch at the low
voltage compartment door. Provisions shall be implemented at the switchgear for
breaker control from a remote control panel. Where a multifunction relay is
specified the control feature available in the relay may also be used. Switchgear
mounted and remote manual tripping facilities shall act direct on the trip coil.
Manual trips via relays are not acceptable.
Page | 19
15.22 In the event of loss of interrupting media, local alarm indication shall be provided
with contacts for remote indication. SF6 gas pressure gauge shall be included
where applicable.
15.23 As minimum, the following signal/indication shall be provided locally and
remotely:
15.24 Alarm Scheme
a) Alarm scheme for trip alarm due to electrical faults-
Trip commands due to operation of protective relays will actuate bell and will be
cancelled by the circuit breaker control handle. Auto trip lamp will glow on the
panel and there will be flag indication on the concerned protective relay/auxiliary
relay of the panel. b) Alarm scheme for non trip alarm: This scheme will conform
to the following:
i. The closing of an initiating contact snail actuate a buzzer and will be accompanied
by a flag indication on the concerned auxiliary relay.
ii. The closing of an initiating contact shall glow a lamp, which will not reset until
the fault has cleared.
iii. It shall be possible to silence tree buzzer by pressing „accept' push button. If after
cancelling the alarm but before resetting the visual signal, the same fault persists
the buzzer shall be suppressed.
iv. If after cancelling the alarm but before resetting the visual signal some other fault
takes place then the alarm accompanied by the flag indication on the concerned
auxiliary relay shall take place.
v. If after cancelling the alarm and after resetting the visual signal, the same fault
appears or some other fault takes place, the alarm flag indication and non-trip
lamp indication shall reappear as usual.
vi. The non-trip alarm acceptance shall be by means of a push button and resetting of
visual signal may also be dune through a push button.
vii. Non-trip Alarm and buzzer shall be actuated in case of low SF6 pressure in any of
the compartments in the GIS.
viii. Means shall be provided for test checking the alarm and lamp circuits.
Conditions Locally Locally Remote Remotely
Circuit Breaker status Open/Closed Status
Earthing switch status Earthed/Open Status
Control Status Manual (test)/Auto/Off Alarm-Non auto
Circuit Breaker tripped on fault Alarm
Loss of control power Alarm
All metering Display Values
Trip Circuit Healthy Display status
Page | 20
ix. The equipment shall be suitable for 110 V DC operations.
15.25 Metering Scheme
Voltmeter & Ammeters on all the panels against the specification shall be of
square, flush mounting type. The line panels shall be mounted with both voltmeter
& ammeter, whereas the transformer panel shall have only the ammeter.
a) Voltmeter shall be accompanied by a suitable selector switch facilitating the
measurement of voltage between phase to phase and between phase to neutral.
The voltmeter coil shall be rated for 110 Volts between phase to phase
obtainable from the secondary of potential transformers. The instrument shall
be of moving iron spring controlled type grade 'A' classification with an
accuracy class of 1 and shall conform to IS: 1248- 1983. IS:2419-1963 (latest
version thereof) or relevant BIS, IEC or ASA standard.
b) Suitably sealed ammeter to cover CTs ratio be accompanied by a selector
switch facilitating the measurement of phase currents as well as the unbalanced
current in the neutral. The ammeter coil shall be rated for 1 Amp. The
instrument shall be of moving iron spring controlled type of industrial grade 'A'
classification with an accuracy class 1 and shall conform to IS:1248-1983,
IS:2419-1963(latest version thereof) or relevant BIS/ I.E.C or ASA standard.
16. INDICATING LAMPS,PUSH BUTTONS AND SELECTOR SWITCHES 16.1 Indicating lamps shall be 22mm diameter type. It shall be LED type.
16.2 Indicating LEDs shall be provided on the control board to indicate the following:
a) Visual indication of ON and OFF position of each circuit breaker. b) Trip
circuit healthy indication c) Auto trip indication to each circuit breaker panel. d)
PT supply indication.
16.3 Push buttons shall match the indicating lamps in style. They shall be 22mm type.
16.4 Control and selection switches shall match lamps and push buttons in style. They
shall be 22mm type.
16.5 Each lamp body shall have moulded insulation. All lamps shall be suitable for
110V or 240V AC supply and shall have low power consumption wide angle
illumination of sufficient intensity for comfortable viewing. A glass of appropriate
colour shall be screwed into the front of the lamp body. An engraved label
indicating the purpose of the lamp shall be provided with each lamp.
16.6 The number of contact blocks of each push button or selector switch shall be
limited to two. Relays shall be used if additional contacts are needed.
16.7 All lamps except circuit breaker close and circuit breaker open indicating lamps
shall be rated for 110 V AC/ DC. The lamps shall have low wattage consumption
and shall provide a comfortable viewing.
16.8 Circuit breaker close and circuit breaker open indication lamps will be suitable for
240V AC. Glass/plastic lens of appropriate colour shall be screwed into the front
of the lamp body.
16.9 For indoor panels painted colour bands shall be used for the mimic bus. The
mimic diagram shall be on eye level. Equipments such as circuit breakers,
isolators, current transformers, voltage transformers etc. shall be represented by
Page | 21
suitable symbols. The colour shall be Red Shade 537 or IS-5 or as per
manufacturer standard design.
16.10 Each cubicle shall have a mimic diagram integrating the following mechanical
operating and indicating elements which shall be operable and visible from
the front.
a) Circuit breaker
• Mechanical ON Mechanical OFF
• Mechanical Indicator Spring charged/discharged
• Mechanical switch position indicator.
• Mechanical operations counter
b) Three position switch disconnecting function
• Opening for inserting level for manual ON/OFF operation.
• Mechanical switch position indicator.
c) Three position switch, cable earthling function.
• Opening for inserting level for manual of ON/OFF operation.
17 CAPACITIVE VOLTAGE INDICATION SYSTEM
17.1 The integrated Voltage Detecting System with integrated indicator unit preferably
to be used to zero voltage logic flash arrow symbols on the indicators display the
mains voltage still existing within the defined response thresholds. The voltage
indication system does not require the electrical repeat tests common for voltage
detection systems. The VIS system has to be designed for maximum operating
reliability. It should feature climate proof encapsulated electronics and is
maintenance free with permanent monitoring of the indication thresholds. VIS
shall satisfy the requirements of IEC 61243.5 VDE 0682 part 415 or EN 61243-5
for integrated voltage detection system.
17.2 Voltage indication system must be provided on the panel front for easy monitoring
of live line indication.
17.3 The connections from the capacitive dividers to the voltage indicator shall be
made with shielded wires.
17.4 Capacitive dividers in the bushing leading to the cable termination should allow
for safe testing of partial discharge and the cable for dead state. These dividers
must be a fixed or plug in type as integral part of the system. Capacitive layers on
the plug connector may be used only for additional resting.
17.5 If there is rear access then voltage indication system on rear side is also provided
for operator understanding and safety during maintenance activity
18. LABELS
18.1 Labels shall identify switchgear cubicles compartments and components.
Nameplates rating plates and labeling of equipment and wiring shall be in
accordance with the relevant Standards and ISO 3864. Functional unit label
designations shall be located at front and rear of panel, be of laminated engraved
black and white plastic with black lettering approximately 20mm high giving the
designations. All withdraw able components shall have a circuit label.
Page | 22
18.2 Each divide including relays, meters, push buttons lamps, fuses, contractors, and
timers shall be clearly labeled to indicate its purpose. Labels shall be positioned to
provide easy identification and correspond to the designation on the panel
drawings. Such labels shall have minimum lettering sizes of approximately 6mm
high for external labels and 4mm high for internal labels. Fuse labels shall show
the rating of each fuse.
18.3 Where divides such as sector switches are attached to doors a label with the same
designation shall be fixed to the reverse (panel-wiring)side.
18.4 Internal labels shall be secured adjacent to the equipment but not on removable
covers. They shall be positioned to allow replacement of labels, equipment or
fixings. Internal label may make use of a durable proprie3tary labeling system
unless specifically indicated otherwise.
18.5 External label shall be engraved or laminated plastic/ A1 sheet and fixed by
riveting.
18.6 A main nameplate shall be affixed in a prominent position on each Switchboard
giving the following minimum information.
• Manufacturers name or trade mark
• Purchase Order number and date
• Switchgear designation
• Rated system voltage current phases wires and frequency
• Rated fault current
• Busbar rating
• Insulator Gas type and petted filling pressure for insulation.
• Alarm pressure for insulation.
• Minimum functional pressure for insulation.
• Minimum functional pressure for operation
• Design pressure of gas filled component.
• Year of manufacture
• Purchasers name
• Serial no.
18.7 Each circuit breaker shall be fitted with a label giving the Serial No. circuit
description and the following information.
• Type/Model No.
• Month/Year of Manufacturing
• Current and voltage rating
• Rated factor making and breaking current
• Circuit designation.
18.8 Labels shall have black characters on a white background. Danger labels shall
have white characters on a red background. Warning labels shall have black
Page | 23
characters on a yellow back ground. Labels shall be made of a non-corrodible
material. Warning for the Pressure in putting Disc shall also be provided on the
GIS panel.
18.9 The contractor shall install permanent red labels displayed at each access area of
the high voltage section of switchgear that requires working.
• DANGER HIGH VOLTAGE SOURCE
• ISOLATE AT THE SOURCE
• POTENTIAL ARC FLASH HAZARD
19. FINISH The colour and finish may be in accordance with the Manufacturer standards for
the service conditions specified subject to PPT approval. The switchgear shall be
fully topical zed.
20. ACCESSORIES A complete set of any special tools required by operation, maintenance and testing
of the switchgear shall be supplied by the contractor.
21. TEST
21.1 The Contractor shall provide test certificates for each design and rating of
switchgear for TYPE tests per IEC 622271-200. Test certificate shall be submitted
with bid and must have been issued by CPRI or accredited test lab of NABL.
21.2 Following Type Test as per IEC 62271-200 & JEC 62271-100 & IEC 62271-102
shall be applicable:
• Dielectric Test for the insulation levels.
• Temperature Rise Test including measurement of resistance.
• Short time & peak withstand current tests.
• Mechanical Operation tests
• Verification of making & breaking current tests.
• Internal arc test for each gas compartment.
21.3 Inspection and test shall be carried out on the complete assembled switchgear.
Transportable units can be wired together instead of completing bus bar joints.
The Third Party Agency will inspect & conduct the Routine & acceptance test at
firm‟s works in presence of PPT representative prior to dispatch of materials. The
cost of Third Party Agency shall be borne by the Contractor.
• Operational (electrical and mechanical tests on all components)
• Dielectric test in accordance with IEC 60694.
Page | 24
• Insulation resistance test applying a 5kV Megger ,between each phase against
earth with two remaining phases connected to earth(ensure that VT is isolated
during the Megger and tested separately).The insulation test shall be carried out
with all manually operated and latched type switching devices in the service and
closed position and all main fuses installed.
• Protection operation by primary injection of current and voltage as agreed.
• Verification of availability and correct operation of all protection and
control functions of all protection relays.
• Inter changeability for withdrawable items.
• Review of Type tests reports of similar rated switchgear panel.
The Third Party Agency will inspect & conduct the Routine & acceptance test at
firm‟s works in presence of PPT representative prior to dispatch of materials. The
cost of Third Party Agency shall be borne by the Contractor. The contractor shall
notify PPT of test at least two calendar weeks prior to commencement. PPT
reserves the right to witness the following tests:
21.4 The following routine tests may be carried out in the factory for the purpose.
Necessary certificates pertaining to this shall be submitted before dispatch of the
material. The Routine tests should be conducted on end product after the gas
work is done. No gas work shall be allowed once Routine tests are done else
they have to be repeated.
- Power frequency withstand voltage
- Auxiliary and control circuits voltage test
- Principal circuit ohm-metric test
- Mechanical operation test
- Electrical auxiliary device test
- Wiring check
- Sealing rest
22. TRAINING The contractor shall arrange the training for PPT representative, at site during
erection and commissioning of GIS. The training should cover engineering
erection & commissioning & O&M aspects.
23. PAINTING The metal structure of the cubicles must be suitably treated and painted according
to the following cycle.
i) Hot (60/700C) surface active alkaline pre-degreasing and degreasing
Page | 25
ii) Double washing
iii) Activation
iv) Phosphating
v) Washing
vi) Passivation
vii) Drying
viii) Electro-static painting with 1800C epoxy polyester powder 60 microns
thickness (-0+20) dry firm with embossed finishing coat. The minimum finishing
thickness must be 50microns.
The color of the painted surfaces will be RAL 7035/SN 700 Light Smoke Grey
(inside and outside) as per approval of purchaser
The painted surface must pass the adherence test in compliance with DIN 53151
standards. The manufacturer shall provide the complete painting procedure and its
adherence/conformity to various standards and quality checks for the approval of
PPT.
Guaranteed Technical Particulars
Sl No. Description Parameters Remarks
1 Voltage 11KV
2 Phases 3
3 Frequency 50HZ
4 Short time rating for 3sec 18.4kA 26.3
5 Voltage class 12 KV
6 Insulation level (PF
rms/impulse peak)
28/75
7 Internal Arc Tested 18.4kA 3 sec or
more
8 System Earthing Solidly earthed
2 ENCLOSURE TYPE IP65/IP4X
Indoor/Outdoor Indoor
2.2 Arc Resistant(suitable for 18.4
KA for 3 sec as per)
Yes
2.3 Tamperproof Category Yes
Page | 26
2.4 Dust Resistant Yes
2.5 Material and Thickness of SF6
Gas enclosure
Non magnetic
stainless steel laser
welded and
thickness acc
manufacturer‟s
standard
3. BUS INFORMATION
3.1 Material Copper
3.2 Busbar insulation SF6 Gas
Rated Continuous current 630A
Short time withstand current 18.4.3kA for 3 sec
Earth Busbar Cross Section At least
30mmx8mm
4 BUS SUPPORTS AND
INSULATION
4.1 Material Epoxy Resin/As
per type tested
design
4.2 Type of Electrical connections
between support insulator and
conductor
Bolting
5. POWER CABLE
ACCOMMODATION
5.1 Power Cable Entry Bottom
5.2 Terminal lug type Socket & plug for
SF6
5.3 Qty. of power per phase per As per SLD
5.4 Cable Testing Arrangement Yes
6. CIRCUIT BREAKER
INFORMATION
6.1 Type Vacuum
6.2 Rated short circuit 18.4kA for 3Sec
6.3 Short circuit with stand time 3 Sec
6.4 Rated Maximum voltage 12 kV rms
6.5 Power frequency Withstand
Voltage
28kV rms
6.6 Lighting impulse withstand
voltage
75 kVp
6.7 Rated continuous current 630 Amp (Incomer
Bus coupler &
Page | 27
Outgoing
6.8 Rated Transient Recovery
Voltage at terminal short
circuit(TRV)
22 kV
6.9 Closing Time <95 Ms
6.10 Closing Time <60 Ms
6.11 Arcing time <15 Ms
6.12 Breaking time <65 Ms
6.13 Dead Time 3 min
6.14 Close-Open contact time <60 Ms
6.15 Spring charged after CO Yes
6.16 Rated Operating duty cycle 0-0.3 sec-CO-3
min-CO
6.17 Trip Free anti-pumping design Yes
6.18 Position indication Auxiliary switch
directly linked to
mechanical drive
Control power voltage range
Trip coil
85%-110%
Control Power voltage range
crossing coil
85-110%
Auxiliary contact total 4NC 6NC
Auxiliary contact voltage
rating
240v,6A
Control Power Voltage Range
Motor for spring charged
mechanism
85%-110%
Stored Energy Time to Fully
Recharge Spring
<5 sec
Number of Close/Open
Operation possible without re-
charging
1 No
Minimum Gas Pressure for
Operation
100
kPa(atmospheric
pressure)
Number of Operations possible
before interrupter maintenance
required at rated SC current
100Nos
Page | 28
24. REFERENCE
STANDARDS
IEC STANDARDS
IEC60044 Instrument transformers(1-Current Transformer 2-Voltage Transformer)
IEC 60050 Part441: International electro technical vocabulary Switchgear Control gear, Fuse
IEC60051 Direct acting indicating analogue electrical measuring instruments and their
accessories
IEC60060 High Voltage Test Techniques
IEC60061 Insulation Coordination
IEC60063 Basic and safety principles for man-machine interface marking and identification-
coding principles for indication devices and actuators
IEC60255 Electrical relays
IEC 60258 Direct acting recording electrical measuring instruments and their accessories
IEC60265 High voltage switches
IEC60269 Low voltage fuses
IEC60282 High Voltage fuses
IEC60366 Specification of technical grade sulphur hexafluoride(SF6)for use in electrical
equipment
IEC60445 Basic and safety principles for man-machine interface marking and identification-
Identification of equipment terminals and of terminations of certain designated
conductors, including general rules for an alphanumeric system
IEC60480 Guidelines for the checking and treatment of sulphur hexafluoride (SF6) taken
from electrical equipment and specification for its re-use.
IEC60529 Degrees of protection provided by enclosures(IP Code)
IEC60616-
DB
General symbols for diagrams
IEC60688 Electrical measuring Transducers for converting a.c electrical quantity to analogue
or digital signals.
IEC60694 Complete specifications for high-voltage switchgear and manufacturer standard
IEC60946 Combined specifications for high voltage switchgear and control gear standard
IEC61000 Electromagnetic compatibility(EMC)
IEC 61634 High voltage switchgear and control gear-Use and handling of sulphur
hexafluoride(SF6) in High voltage Switchgear and Control gear
IEC62261 Part High voltage switchgear and control gear(_Part 100 High-voltage alternating-
current circuit breakers. Part 200: High voltage switchgear and control gear Part
200 : AC meter enclosed switchgear and for rated voltages above 1-KV and up to
and including 52kV)
IEC
61243-5 Voltage Detection System
Page | 29
ISO – International Organization for Standardization ISO 3864 Safety Colours and
Safety Signs BRITISH STANDARDS BS 159 High voltage bus-bar and bus-bar
connections BS 6231 PVC insulated cables for switchgear and control gear wiring.
25. OLD & DISMENTALLED MATERIALS:
The Contractor shall dismantle & shift the existing OD RMU / defunct VCB panels at
different locations of Paradip port to the premises of 132/33/11 KV Control Room after
replacement of New GIS panel at his own cost as per BOQ and direction of EIC.
Annexure-“A”
Page | 30
Annexure-“B”
Page | 31
Annexure-“C”
Proposed for CISF S/S, YLC S/S, GHC S/S, SECTOR-IV S/S, Industrial S/S, Old Gate-II
S/S, Slip Way S/S & JC-59 S/S.
Page | 32
Annexure-“D”
Proposed for NB-II S/S, C&F S/S, GJAI S/S, STP-II S/S, SECTOR-21 S/S, Fishery Harbour
S/S, Ghanagholia S/S & Raw Water S/S.
Page | 33
Other Commercial Conditions:
1) Payment Terms:
The payment will be made as follows:
i) 90% payment will be released after successful completion of the work and
acceptance thereof by the Engineer In-charge (EIC). However, running bills will
be entertained up to a maximum of 10 nos.
ii) Balance 10% of the total contract value shall be retained by PPT towards
Performance Security Deposit. The Performance Security Deposit shall be
released after successful completion of the warranty period only. The Contractor
may furnish a Bank Guarantee of equal value valid till 60 days after expiry of the
warranty period in which case the balance 10% money will be released for
payment.
2) Security Deposit:
A sum of 10% of accepted value of the tender shall be deposited by the successful
bidder (Contractor) as Security Deposit (SD). This will be deposited initially 1%
value of the contract as initial security deposit (ISD) in shape of a Bank Guarantee
or Demand Draft (DD) / Banker‟s Cheque drawn in favour of FA&CAO, Paradip
Port Trust (DD/ Banker‟s cheque shall be payable at Paradip) within 15 days of
issue of Letter of Intent (LOI). After deducting the EMD and ISD from the
stipulated security deposit, the balance amount will be recovered in instalment
through deduction at the rate of 10% of the value of each running account bill
subject to attaining the required amount by the last running bill. In case of
exemption of EMD, the successful bidder has to deposit initially 3% of the contract
value as ISD instead of 1% of contract value.
The Contractor may submit Bank Guarantee for the balance amount after deducting
the EMD and ISD from the stipulated security deposit in which case there will be no
deduction from the running bills towards security deposit.
EMD of the successful bidder may be refunded to the bidder after receiving an
equivalent amount of Bank Guarantee only after issue of work order and signing of
agreement.
Page | 34
The Contractor may also submit Bank Guarantee for a sum of 10% of accepted
value of tender as Security Deposit (SD) within 15 days of issue of Letter of Intent
(LOI) in which case (i) deposit of 1% ISD will not be required; (ii) there will be no
deduction from the running bills towards security deposit; and (iii) EMD of the
successful bidder will be refunded to the bidder after issue of work order and
signing of agreement.
The security deposits shall be returned to the Contractor within 45 days of
successful execution and acceptance of the work. The BG shall be valid till 45 days
after the scheduled date of completion of the work.
5) Execution Period:
The execution period of the work shall be 360 days from the date of issue of work
order.
4) Warranty:
The entire work shall warrant for the period of 3 years from the date of completion
& acceptance.
Page | 35
1BILL OF QUANTITY
Name of the work: - Budgetary Offer for the work “Revamping of 11 KV HT
Electrical Distribution Systems at different locations of
Paradip Port.”
Sl.No Description of work Unit Qty Rate Amount
01. Supply, installation, testing & commissioning of 7-Panel board 11Kv, 630A, GIS Panel having 02 Incomers, 01 bus-coupler and 04 outgoings including execution of termination with supply of required materials as per scope of work.
Set.
02
02. Supply, installation, testing & commissioning of 6-Panel board 11Kv, 630A, GIS Panel having 02 Incomers, 01 bus-coupler and 03 outgoings including execution of termination with supply of required materials as per scope of work.
Set.
09
03.
Supply, installation, testing & commissioning of 5-Panel board 11Kv, 630A, GIS Panel having 02 Incomers, 01 bus-coupler and 02 outgoings including execution of termination with supply of required materials as per scope of work.
Set.
08
04. Supply, installation, testing & commissioning of 4-Panel board 11Kv, 630A, GIS Panel having 02 Incomers, 01 bus-coupler and 01 outgoing including execution of termination with supply of required materials as per scope of work.
Set.
08
05. Dismantling & shifting of existing OD RMU & defunct VCB Panel to 132/33/11 KV Control Room premises including all expenditure.
Set 27
N.B: GST percentage to be mentioned extra. TOTAL: Rs.
Rupees ---------------------------------------------------------------------) only.
Page | 36
NOTE:
1. GST if any, percentage may be mentioned as extra.
2. Any query in this regard may be raised to the following email id prior to dt. / /2019
(up to 17:00 hrs.) which will be clarified by dt. / /2019 by uploading in the website
for facilitating submission of a competitive budgetary offer.
3. Budgetary offers shall be submitted to the following address (through email or by
Registered Post):
Executive Engineer (Elect),
Port Electrical Division – II,
Paradip Port Trust.
PO: - Paradip,
Dist: - Jagatsinghpur.
Odisha – 754142
Contact No. 9777180842
Email Id: [email protected]
