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MUNICIPAL CORPORATION OF GREATER MUMBAI
(HYDRAULIC ENGINEER’S DEPARTMENT)
BHANDUP COMPLEX
E-tender for
Sr. No. Subject Schedule copy which include1 S.I.T.C of 2.5MWp solar power
generation plant on the roof top of new
MBR at Bhandup Complex.
• Technical Specifications• Commercial: cost estimate• Disclaimer
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MUNICIPAL CORPORATION OF GREATER MUMBAI
Subject : - S.I.T.C of 2.5MWp solar power generation plant on the roof top of new
MBR at Bhandup Complex.
Need of Work:
Bhandup Complex Water Treatment Plant is one of the biggest water treatment plants
in Asia continent having 2810 MLD capacity of raw water treating to standard potable water
to meet the requirement of Mumbai city. The plant is operational since last 38 years and
working round the clock. Since inception; M/s. TATA Power Company Ltd supplies
electricity to Bhandup Complex. There are augmentations happening in the plant treatment
capacity and electricity demand is increasing day by day.
At present, electricity is received at Bhandup Complex through two numbers of 110
kV Salsette and Kolshet transmission lines of M/s. Tata Power Company Ltd which is
stepped down to 3.6 kV by two numbers of 12.5 MVA power transformers. Presently
maximum demand of the plant is 7800 kVA with connected load of 13000 kVA. Annual
energy consumption is about 46004 MWh amounting to Rs 3.5 to 4 Cr monthly electricity
bill.
Bhandup Complex is situated at the edge of Sanjay Gandhi National Park and spread
over about 400 acres area. There is ample space available atop various structures, which is
not in use for any purpose. It was decided to explore the possibility of renewable energy
generation i.e. photovoltaic solar power generation using those available open spaces. IIT
Mumbai has examined the possibility during prefeasibility study and subsequently prepared
Detailed Project Report (DPR) for the proposed solar power plant of total rated capacity of
11.03 MWp. Accordingly, it was decided to install and commission a pilot solar project of 2.5
MW PV solar power plant on available open spaces of CCT and surrounding area.
2.5 MWp Solar power plant has been commissioned at Bhandup Complex on
15.04.2018. Power generation by this solar power plant is being used for the captive
consumption of Bhandup Complex water treatment plant. The total power generated through
this plant is about 30,00,000 kWh units. It is seen that, due solar power generation about 5%
saving is observed in the last 12 months.
In view of performance evaluation of pilot plant as detailed above, it is proposed to
carry out the work of S.I.T.C. of 2.5 MWp solar power generation plant on the roof top of
new MBR at Bhandup Complex.
TECHNICAL SPECIFICATIONS
INDEX
Sr. No. Description
1 Solar PV Module
2 Module Mounting Structure
3 String Combiner Box
4 Inverter
5 DC cabling
6 AC cabling
7 Step up transformers
8 3.6kV Outdoor Vacuum Circuit Breaker
9 Current Transformer
10 Potential Transformer
11 3.6kV Outdoor Junction Box
12 Surge arrestors & Lightning arrestors
13 Earthing and Lightning protection
14 Relay Protection Scheme
15 Power Evacuation Strategy
16 Standard Metering
17 Energy Management System
18 Weather Monitoring System
19 Civil Works and Fencing
20 CCTV Surveillance System
21 Power Generation Guarantee
22 Operation and Maintenance Work
23 Insurance
24 Warranty/Guarantee
25 Handing Over – Taking Over
26 Liasoning Work
27 Electrical Wiring Diagrams
28 Testing/Inspection
29 General Instructions to the Tenderer
1. Solar PV Module: Technical detail of PV module is as below:Parameters DataNo. of cells 72 (156.75 x 156.75 mm) 5BBSTC Max Power (Wp) 330NOCT Max Power (Wp) >237Module Efficiency > 16.80%Pmp Tolerance 0 - +3%Imp Tolerance 0 - +3%Pmp Temp coefficient < -0.45 %/0CSystem Voltage 1000VNOCT 450C + 20CJunction Box IP67Glass transmission index > 98%Cables Photovoltaic Technology cable 4.0 mm2,
1200 mm Connector MC4 or Amphenol H4/UTXFrame Anodized aluminium with twin wall
profile, water runoff and drain holesWeight < 90 gm/WRFID As per MNRE specs
The back sheet of the solar panel shall be white colour, robust construction, three layerlaminate having high dielectric properties. The back sheet should protect the pv module fromUltra Violet (UV) rays while acting as an electrical insulator.
Codes and Standards: Standards for PV module is as belowCode DetailIEC 61730-1 Requirements for Construction, II-Requirements for Testing
and Safety QualificationIEC 61215 c-Si PV Module Design Qualification and Type ApprovalIEC61701 Salt Mist Corrosion TestingIEC62716 Ammonia Corrosion TestingISO9001:2008 Quality Management Systems RequirementsISO14001 Environmental Management systemClass A (Safety Class II) Double Insulated Appliance
Testing and Warranty: PID-TUV Test Result (5% degradation allowed) EL-micro-crack free Field Test Reports - eg. Photon Yield, NREL Product warranty -10 years Power warranty -linear 25 years-80%
Special requirements in PV Modules: Insurance for power warranty Hydro-phoebic coating on glass PID free
List of PV module manufacturer:Tier-1 solar PV module manufacturers (Indigenous or overseas) are preferred.
OR Equivalent indigenous pv solar panel manufacturers those who area) In the field of pv solar manufacturing for more than three years with annual productioncapacity of 100MWp or more and having fully automatic, state of the art pv solar panelmanufacturing process.b) The company shall have sold pv solar panels to the tune of 100MWp or more during thelast three years.
2. Module Mounting Structure: The support structure shall be low height structure, light weight, full aluminium, corrosionresistant, aesthetically beautiful and modular in nature. Solar panels are required to be kept atan angle of 15 degrees in order to generate optimum power throughout the year. PV modulestructure are designed according to IS: 875(part3).Calculations:Different wind zones are defined in India. For Mumbai velocity of air ‘Vb’ (Regional basicspeed) is 44 m/s.Design Factors which shall be considered are:Risk coefficient factor K1= 0.91, Terrain & Height factor K2= 1.155Topography factor K3= 1Design Wind Pressure:Design wind speed= VZ = K1x K2xK3xVb = 46.2462 m/sWind pressure at height z PZ = VZx 0.62 = 1283.22661 N/m2
Wind load calculations:CP = 0.7 PZ = 898.258626 N/m2
CP = -1.1 PZ = 1411.54927 N/m2
Force on solar panel:F= 2709.906 NFV= 2617.568192 NFH=701.3752832 NFactor of safety (considered) = 2F= 5419.812 N = 5.42 KNFV= 5235.136384 N = 5.24 KNFH=1402.750566 N = 1.403 KNDead LoadThe weight of solar PV systems shall be considered in the design of the structure. In this caseit is 20.5kg/module. It is very less when compared to wind load. Since dead load is very lesswhen compared to wind load, it can be neglected. Figure below shows the forces acting onPV Module.
Major Components of MMSSr.No.
Components Details
1 T-section One T section can support two solar panels.2 C-section To hold T-section in position and connected to Handle
section.3 Handle section Continuous Handle section is used to make sure that
supporting structures are connected to one another. T-sections and C-sections are connected to Handle section andit in turn anchored to the roof.
4 Leg angles To connect T-section and C-sections to handle section.
Solar panels are connected to T-section. Two C-sections with a cut at an angle of 15 degreeare connected to handle section by proving sufficient gap to accommodate web portion of T-section with the help of Leg angle. This T-section is connected to handle section at one endwith the help of Leg angles and connected to two channel sections at the other end. Now, thishandle section is connected to the ground by anchoring (in addition to anchoring glue mayalso be provided) where ever it is necessary. Alternatively, instead of Aluminum, Hot DipGalvanized C and T sections, as shown in the drawings below can also be used in the structure. Thepictures of components used in structure are shows in drawing section.
Assembly of Module Mounting Structure (MMS)The list of components which are required for the MMS for supporting two panels is asfollows:
Sr.No.
Materials Quantity
1 Handle Sections 32 C – Sections 63 T – Sections 34 Leg Angles 125 M 10 Bolts and Nuts 186 M 6 Bolts and Nuts 20
Major components of Module Mounting Structure (MMS):
Assembly of Module Mounting Structure (MMS)
Specifications of different section
3. String Combiner Box:Fuse and isolator rating of string combiner box (SCB) is 15A and 160A respectively. TheSCB chosen is 12 input/1 output based on the current rating of fuse and isolator which isbased on module Isc and no. of string inputs to SCB. The voltage rating of fuse and isolator isbased on maximum system voltage (1kV). Specifications for Hensel make String CombinerBox (SCB) (10 IN and 1 OUT) is as follows.
Sr.No.
Item Description Dimension Rating Type Make
1 Empty Box – Transparent Low Lid
600× 600 ×170
Mi 0800 Hensel
2 Empty Box – Transparent High Lid
300 × 450 ×214
Mi 0316 Hensel
3 Cable Entry Flanges with fastening wedges
Mi FP 20 Hensel
4 Cable Entry Flanges with fastening wedges
Mi FP 15 Hensel
5 Well gasket Mi WD 2 Hensel
6 Cable gland M40 (22-33mm)
1555.20.13 Hensel-Agro
7 Locknut M40 8240 Hensel-Agro
8 Cable gland M20 (7-13mm) 1555.20.13 Hensel-Agro
9 Locknut M20 8220 Hensel-Agro
10 Cable gland M16 (4.5-10mm)
1555.17.10 Hensel-Agro
11 Lockout M16 8217 Hensel-Agro
12 Bus bar 12 X 10 mmCu
Mi SS 25 Hensel
13 Mounting Profile Mi MS 2 Hensel
14 Isolator 400A 1000V DC
S5-04004PC0 Telergon/Socomec
15 Direct handle 400A 1000V DC
DS-SI 11 Telergon/Socomec
16 Bridging Link 400A 1000V DC
DS-PI14 Telergon/Socomec
17 Auxiliary Contact 125A, 100V DC
D5LAU01 Telergon/Socomec
18 Surge Arrester, Type II
1000V DC
DS50PVS-1000 Citel
19 Hall Sensor String Monitoring PCB/Card with RS 485 (Wurth Nuts – 7 Nos)
24CH ACB - 24 Hensel
20 Surge Protector forDataline
DLA-12D3 Citel
21 Power Supply Unit for Data Line
1000V/24VDC
PV15-27B24A4 Mornsun/Noark/ Reputed
22 Fuse Link 3A/1A,1000V DC & 15A,1000V DC
HP10M03/HP10M01 &
HP10M15
Mersen/Bussmann/Reputed
23 Fuse Base USM1HEL Mersen/Reputed
24 Male Connector (PanelMounting)
4 sq mm EMPVPCM4 Elmex/Reputed
25 Female Connector (Panel Mounting)
4 sq mm EMPVPCF4 Elmex/Reputed
26 Terminal Block 4 sq mm KUT 4 – 1× 2 Elmex
27 End Plate 4 sq mm KPM4 Elmex
28 Shorting Link SSL 6 Elmex/Reputed
29 Terminal Block 6 sq mm DST 6 Elmex
30 Terminal Block 4 sq mm KUT 4 – 2× 2 Elmex
31 End Clamp CLIPFIX 35 /SCUN
Phonix/Elmex
32 End Plate 4 sq mm KPM4 Elmex
33 Mounting Plate (Size 8)
Reputed
34 Looping Busbar (4 Pin)
FTG
35 Looping Busbar (2 Pin)
FTG
36 Busbar & Busbar support
25× 10 mm Cu 500A Reputed
37 Wiring Siechem
38 Accessories,Cables,Lugs,sleeves,Acrylic sheet,ferrules,screws etc,
Reputed
Proper lightening protection arrangement shall be provided to pv solar power panels andpanel area at all location. The DC power generated shall be feed into the grid through Indoor-Outdoor type of electrical substations.
4. Grid interactive (Grid Tied) Solar Inverter: The power generated by PV modules will feed to 540 KVA inverters through string combinerboxes. The grid tied inverters will convert DC power into AC and feed into grid.
Technical requirement of solar inverter is as below.Sr. No. Particulars Technical details
1 Size 540kVA
2 Real power 540kW (at PF = 1)
3 Euro Efficiency > 98.5%
4 Efficiency at 20% load > 98%
5 MPPT Tracking Efficiency > 99%
6 Maximum DC power > 1.1 X AC power
7 MPPT Voltage range 440 – 800V
8 Vmp minimum 500V
9 Maximum Input Voltage 1000V
10 Number of MPPT inputs 1
11 Internal consumption at night < 0.1% of rated power
12 Output (AC) Voltage 300 V
13 Frequency 50Hz (+/- 3)
14 Harmonics Distortion < 3% at rated power
15 Ambient air Temperature for operation
-100C to 500C (140F to 1220F) full power,
power derating to 550C
Codes and Standards: Codes and standard for inverter is as below:Codes & Standards DetailsIEC 60068-2 Environmental SystemsIEC 61683 Efficiency MeasurementsIEC 61000 EMC (Electromagnetic Compatibility)IEC 62109 1- General Safety Requirements,
2 - Inverter Specific SafetyIEEE 1547/UL1741 Interconnecting distributed resources with electric power
systemsCEA Grid Code 2007 Part II
HT Grid Connectivity Standard for Renewable EnergyResources
CEA Grid Code (Draft)-2013
LT Grid Connectivity Standard for Distributed EnergyResource
Warranty 5 years of product warranty Mean Time between Failure (MTBF) >5 years Mean Time to Repair (MTTR) < 24 hrs
5. DC Cabling:a) Module String to SCB Photovoltaic technology cable 4 mm2 PV-1-F EBXL-XLPO tinned Cu conductor cable. The current carrying capacity of 4 sq mm XLPO insulated copper cable is 68A.b) SCB to Inverter 120 mm2 Polycab Aluminium cable or higher size dc two core cable to withstand about
325 Amp current.
6. AC Cabling:a) Inverter to TransformerA 400 sq mm 3C, 1.1kV XLPE insulated aluminium armoured cable is required to beprovided. The current rating and short circuit current rating for 1.1kV grade 3C Al cables asper IS:7098 (part 1) which are required for inverter to transformer on the LV side.
b) Transformer to evacuation point (MV)A 400 sq mm 3.5C, 3.6kV XLPE insulated Aluminium armoured cable. The below tablesgives details for current rating and short Circuit Current rating of 3.6/11kV XLPE insulated3.5 core Al cables which are required for Transformer to evacuation point on the MV side.Current rating of 3.6/11 kV XLPE insulated 3.5 Core Al Cable is shown in table below.
Conductor sizes in sq.mm. Continuous AC current capacity in Amps. atmaximum conductor temp. of 90 deg C.
When laid direct in the ground 30 deg .C
3.6/11 Kv
400 sq mm 405
Short Circuit Current rating of 3.6/11 kV XLPE insulated 3.5 Core Al Cable is shown in tablebelow Duration of Short Circuit
in secArea of Al conductor Short circuit current in kA
A I = 0.094 x A/sq.rt (t)1 400 sq.mm. 37.60
Specific Technical Requirement of MV CableThe MV cable selected should be rated for 3.6/11 kV grade. The below table shows thespecific technical requirements recommended for the MV Cable.
Sr. No. Particular Unit Data1 Rated Voltage kV 3.6/112 Type of Insulation - XLPE3 Single core/Multi core - Single/Three core4 Armoured/Unarmoured - Armoured5 Material of Conductor - Aluminium/Copper6 System - 3.6/11 kV Earthed7 Highest System Voltage kV 3.6/128 Conductor size sq.mm 120, 150, 185, 240, 300,400
9 MaterialStranded Aluminium/copper
10 Shape of Conductor Circular11 Short Circuit Current kA 13.12 , 18.35 for 3 secs.12 Power Frequency Withstand Voltage kV rms 2813 Lightning Impulse Withstand Voltage kVp 7514 Continuous Withstand Temperature Deg C 9015 Short Circuit withstand Temperature Deg C 25016 Oxygen Index Min 29 (as per ASTMD 2863)17 Acid Gas Generation Max 20% ( as per IEC 754-1)18 Smoke Density Generation 60% (As per ASTMD 2843)19 Flammability Test As per Swedish Chimney test
c) Testing of MV CableType Test:All the necessary type test shall be carried out as per relevant IS standard.Field TestField tests shall be performed after laying and connecting the cables to the system to complyto IS: 1255 Code of practice for installation and maintenance of power cables up to andincluding 33 kV rating.
Codes and Standards for AC Cables:Codes and standards
Details
IS:7098 (Part -I) Specification for XLPE insulated PVC sheathed cables for workingvoltages up to 3.6 kV
IS:7098 (Part -II) Specification for XLPE insulated PVC sheathed cables for workingvoltages up to 3.6 kV up to and including 33 kV.
IS:1554 (Part-I) Specification for PVC insulated cables for working voltages up to andincluding 1100V
IS : 3975 Low Carbon Galvanized steel wires, formed wires and tapes forarmouring of cables.
IS : 4905 Methods for random sampling.IS : 5831 PVC insulation and sheath of electrical cables.IS : 8130 Conductors for insulated electrical cables and flexible cords.IS : 10418 Specification for drums for electric cables.IS : 10810 Methods of tests for cables.IS: 1255 Code of practice for installation and maintenance of power cables up
to and including 33 kV RatingMake: HT and LT cables shall have following makes.M/s. RR, Polycab, Finolex, KEC, Havells, universal, Apar.
7. PV Distribution Transformer: Below table shows the specific technical requirements of Transformer
Sr. No. Particular Technical Details1 Rated Capacity 1250 kVA
2 IS Standard IS 20263 Type of Cooling ONAN
4 No. of phase and rated frequency 3 and 50 Hz5 Rated voltage at no load HV/LV (in
kV)3.6kV/0.300V-0.300V
6 Connection (HV/LV) Star / ∆ ∆7 Vendor Group YNd11d11
8 Insulation Level LI 60 AC 20/ AC39 Ambient Temperature -10 deg C to 50 deg C
10 Temperature Rise (Oil/ Winding) degree C
50/550C
11 Flux density 1.6T (Max)
12 % impedance 5.5% (As per IS 2026)
13 Required ratio of no Load losses 1.25kW 14 Required ratio of load losses 12.5kW
15 Conservator Air Cell type Conservator16 Type of tap changer Off Circuit Tap Switch
17 Tap range, Number of steps, step size & location
+ 10% to -10 @2.5%, 8 steps
18 Neutral Current Transformer CTs for back up earth fault should beprovided on the neutral end
19 Parrallel operation Suitable for parallel operation withtransformers of similar ratings
20 Auxiliary supply voltage 240V AC
21 Efficiency > 99%
General requirement of transformer is as follows:Design, engineering, manufacture, testing and supply of 1.25MVA ONAN 300V/300V/3.6kV, DDyn11, oil filled transformer for the Solar Power Plant.
• Transformer shall be acting as Generator transformer and should be evacuating powerfrom 300V multiple 540 kVA Inverters and step up to 3.6 kV.
• Transformer should be installed outdoor in hot, humid and tropical atmosphere. Allequipment, accessories and wiring should be provided with tropical finish to preventfungus growth.
• The transformer should be capable of withstanding the short circuit stresses at 25kAfor 3 Sec due to a terminal fault on one winding with full voltage maintained on theother winding for minimum period of three (3) seconds.
• The transformer should be free from annoying hum or vibrations. The design shouldbe such as not to cause any undesirable interference with radio or communicationcircuits.
• The safety clearances of all live parts of equipment should be as per relevant standard.• Transformers should be capable of delivering rated current at an applied voltage up to
105% of rated voltage without exceeding the temperature limits.• Overload capacity of the transformer should be as per IS 6600 – 1972.• Designed for suppression of harmonics, especially 3rd and 5th.• The transformer and accessories should be designed to facilitate operation, inspection,
maintenance and repairs. All apparatus should also be designed to ensure satisfactoryoperation under such sudden variations of load and voltage as may be met with underworking conditions on the system, including those due to short circuits.
• The design should incorporate every reasonable precaution and provision for thesafety of all those concerned in the operation and maintenance of the equipmentkeeping in view the requirements of Indian Electricity Rules.
• All material used should be of the best quality and of the class most suitable forworking under the conditions specified and shall withstand the variations oftemperatures and atmospheric conditions arising under working conditions withoutundue distortion or deterioration or the setting up of undue stresses in any part, andalso without affecting the strength and suitability of the various parts for the workwhich they have to perform.
• Means should be provided for the easy lubrication of all bearings and where necessaryof any mechanism or moving part, that is not oil immersed.
Construction• Tank should be of all welded construction and fabricated from good commercial grade
low carbon steel of adequate thickness. All seams should be properly welded. Allwelding should preferably be stress relieved.
• The tank wall should be reinforced by stiffener to ensure rigidity so that it canwithstand without any deformation, mechanical shock during transportation andduring oil filling by vacuum.
• Transformer tank should be provided with one set of bi-directional flanged wheels forrolling the transformer parallel to either center line.
• All heavy removable parts should be provided with eye bolt for ease of handling. • Hand holes of sufficient size should be provided for access to leads, windings, bottom
terminals of bushings and taps.
Cores and Coils• The Transformer core should be built up with high grade, non-aging, low loss, high
permeability, grain oriented, cold-rolled silicon steel laminations especially suitablefor core material.
• The coils should be manufactured from electrolytic copper conductor and fullyinsulated for rated voltage.
• Insulating material should be of proven design. Coils should be so insulated thatimpulse and power frequency voltage stresses are minimum.
• Coil assembly should be suitably supported between adjacent sections by insulatingspacers and barriers. Bracing and other insulation used in assembly of the windingshould be arranged to ensure a free circulation of the oil and to reduce the hot spot ofthe winding.
• All leads from the windings to the terminal board and bushings should be rigidlysupported to prevent injury from vibration or short circuit stresses. Guide tube shouldbe used where practicable.
• Flux density under specified over voltage or frequency conditions should be withinthe maximum permissible for the laminations.
• Transformers should be designed to withstand 110% over fluxing corresponding torated voltage.
• Permanent current carrying joints in winding and leads should be brazed. • Insulating materials should be compatible with transformer liquid under all service
conditions. • Leads to the terminal board and bushings should be rigidly supported.
Radiator• Radiators should be made from pressed steel and should be detachable type. • Radiators should be interchangeable type. Top and bottom shut off valve should be
provided for each radiator. • Each radiator should be provided with air release plug, drain valve and lifting lugs. • Thermometer pockets with thermometers in the inlet and outlet pipes (for separately
mounted radiator banks).
Buchholz Relay• Double float relay as per IS 3677 - 1985.
• Shut off valves on either sides of the buchholz relay • Pot cocks at the top and bottom of relay drain plug, inspection window, calibrated
scale, terminal box with oil tight double compression type brass gland. • Potential free, self reset independent alarm and trip contacts, rated to make, break and
carry minimum 5 amps at 220 V AC/ DC No auxiliary relay should be used tomultiply the contacts. Contacts are to be wired to the marshalling box.
Insulating Oil• The transformer should be filled with mineral insulating oil suitably inhibited to
prevent slugging. • First filling of oil along with 10% excess should be furnished for each transformer.
Oil should be supplied in non-returnable containers suitable for outdoor storage. • DGA report of oil should be provided by supplier at the time of inspection.
Bushings• Conforming to IS 3347 Part 5 - 1979, Part 3 - 1988 and 2099 - 1986. • Minimum rated current of line and bushings should be 1.5 times rated current of the
corresponding windings • Clamps and fittings made of steel or malleable iron should be hot dip galvanized. • Bushings rated 400 Amps and above shall have non-magnetic clamps and fittings
only. • Neutral bushings should be provided as required for earthing of neutral point. • Should be designed for polluted area.
Terminal Boxes• Windings should be brought out and terminated on cable boxes. • HV and LV side should be suitable for Cable termination. Terminal chamber shall
have a gasketed cover plate bolted to it and should be weatherproof with IP-55 degreeof protection.
• A separate inspection cover with lifting handle should be provided to facilitateconnection and inspection.
• HV side outdoor cable box should be supplied complete with cable connectorssuitable for the specified cable size.
Terminal Arrangements• Terminals on LV side should be through cable box. • Cable-end box should be weatherproof, air filled type with sufficient space inside for
termination and connection of cables. • Cable-end box should be furnished complete with removable gland plate. • Provision to be made on the LV terminals of transformer (Refer the detail shown
below in Figure) • Connection of Cu / Al cables from Inverter.
Marshalling Box
• Sheet steel, weatherproof, IP55 marshalling box should be provided for transformer.The box should contain all auxiliary devices except those, which must be locateddirectly on the transformer.
• All terminal blocks for cable connection should be located in this box.
Wiring• All control, alarm and indication devices provided with the transformer should be
wired up to the terminal blocks. • Wiring should be done with PVC wires / cables. Minimum wire size should be 2.5 sq.
mm copper. Not more than two wires should be connected to a terminal. 20% spareterminals should be provided.
• All devices and terminal blocks within the marshalling box should be identified bysymbols corresponding to those used in applicable schematic or wiring diagram.
Grounding• Two grounding pads, located on the diagonally opposite sides of the tank, should be
provided for connection to station ground conductor. • Grounding pad should have clean buffed surface with two tapped holes, M10 G.I.
bolts and spring washers for connection 75 x 10 mm G.I. flat. • Ground terminals should be also provided on marshalling box to ensure its effective
earthing. • Metallic Bonding shall be provided between various non-current carrying parts of
transformer accessories wherever the same are connected through gaskets or withoutgaskets.
• Transformer neutral should be connected to Solid Earth.
Fitting and AccessoriesThe Transformer should be supplied with the following fitting and accessories. Theaccessories supplied should comply Indian Standards & CBIP norms.
• Oil conservator with shut off valve, drain cock and magnetic oil level indicator withmaximum & minimum oil level markings and alarm & trip contacts. Atmo-seal typeconservator (Air cell) should be provided so that air and oil do not come in contactwith each other.
• Silica gel breather with silica gel & oil seal. • Pressure relief valve with 2 nos. auxiliary contacts. • Inspection covers with handles. • Air release plug on tank cover. • Oil filling hole and cap. • Two earthing terminals. • Thermometer pockets. • Bi-directional rollers. • Rating & Terminal marking plate. • Filter valve. • Top and Bottom sampling valve with cover plate. • Oil drain valve with cover plate. • Marshalling box complete with wiring etc. It should also be provided with
illumination lamp, space heater & suitable cable glands & lugs. • Lifting lugs for complete transformer & for other components wherever necessary. • Manufacturer’s name plate. • Base channel with towing holes / lugs and centre of gravity market. • Skid arrangement. • Detachable radiators with drain plug, air release plug, top & bottom shut- off valves &
lifting eyes. • Oil surge relay , if applicable • Flexible copper links between tank cover & tank body for earth continuity.• Buchholz relay with double floats, one for alarm and one for trip. Buchholz relay shall
be provided with isolating valves on both sides and flanged connection piece shall besupplied for use when Buchholz relay is not in use.
• Dial type thermometer with maximum reading pointer, alarm & trip contacts for oil &winding temperature monitoring. 4-20 mA signal and modbus communication port tobe provided for interfacing with PLC system.
• Magnetic type oil level detector with Alarm/Trip contacts for main conservator tank. • Cable support arrangement for I/C & O/G cables.
Paints• All steel surfaces should be thoroughly cleaned by sand blasting or chemical agents,
as required, to produce a smooth surface free of scales, grease and rust. • The internal surfaces in contact with insulating oil should be painted with heat
resistant insulating varnish which should not react with and be soluble in theinsulating liquid used.
• The external surfaces, after cleaning, should be given a coat of high quality red oxideor yellow chromate primer followed by filler coats.
• The transformer should be finished with two coats of Siemens Grey (RAL 7032) anti-corrosive paint.
NoiseAudible Noise level should not exceed 84dbA in 1 mtr radius.Transformer Losses:Losses of transformers shall be as per the guidelines of ECBC.Transformer Alarm and Trip Contact
• Oil level low- 2NO+1NC contact • Top oil temp indicator- 2NO+1NC contact • HV winding hot spot temp indicator- 2NO+1NC contact • LV winding hot spot temp indicator- 2 NO+1NC contact • Buchholz – 2 NO+1NC contact • Pressure relief device – 2NO+1NC contact • Magnetic oil level – 2NO+1NC contact
Bushing current Transformers• For back up earth fault CT should be provided. • Removable at site without opening transformer tank cover/active parts. • Secondary leads should be brought to a weatherproof terminal box and from there to
the marshalling box. • Rating to be decided by the supplier. Calculation of the same to be provided by
supplier during detail engineering.Off-Circuit Tap Switch
• Externally hand operated with easily accessible links. • Designed for sustained over current of at least 150% of the rated current of the
winding. • Should not occupy any intermediate position between clearly marked tap position. • Capable of repeated operation and withstanding short circuit forces. • Tap position indication diagram.
• Inspection and/or repair should not removal of transformer core from tank.
System Description• System operating voltage: 440V: 3.6 kV• Max operating voltage of the system (rms): 3.6 kV• Rated frequency: 50Hz ± 3%• Number of phase: 3
Site ConditionsAll equipments components and materials used in the work should be suitable forcontinuous operation under following ambient conditions-
• Ambient temperature: 50ºC• Minimum ambient temperature: -10ºC• Site elevation : <1000Mtr• Atmosphere: Tropical• Soil electrical resistivity: 10 Ohm Mtr• Seismic zone: As per IS
Codes and Standards for TransformersThe design, manufacture and testing of the Transformers and accessories shall be carried outas per the latest applicable Standards as recommended below:Codes & Standards DetailsIS - 2026 Power TransformersIS- 3639 Fittings and accessories for TransformersIS – 335 New Insulating oilsIS – 7404 Paper covered Copper ConductorIS – 3347 Dimensions for porcelain Transformer bushing for lightly polluted
atmospheresIS – 1271 Thermal evaluation and Classification of electrical insulationIS – 2099 Bushings for alternating voltages above 1000VIS – 6600 Guide for loading of oil immersed transformers
Technical Documentation for TransformersTypical general arrangement drawing showing constructional features and disposition ofvarious fittings and loading.
• Guaranteed Technical Particulars. • Type test certificates on similar equipment. • Dimensional general arrangement drawing showing disposition of cooler banks and
various fittings. • Transport / shipping dimensions with weights, wheel base detail un-tanking height
etc. • Foundation plan & loading. • Terminal arrangements of LT side boxes. • Terminal arrangement for HT side boxes. • Drawings of Cable boxes etc. • Instruction manuals on Transformer and its various fittings clearly indicating method
of installation, check-ups and tests to be carried out before commissioning of theequipment.
• All routine test reports as per applicable relevant standards.
Inspection and TestingDuring manufacturing and on completion, all transformers should be subjected to theroutine test as per IS- 2026. Following special tests should be carried out.
•Temperature rise on both maximum & minimum rating. •Short circuit capability must be demonstrated by test or calculation. •Zero phase sequence impedance on each unit.•Measurement of insulation resistance to earth of the winding and between winding on
each unit.
Make: M/s. Volt-Amp, EMCO, KIRLOSKAR, Crompton Greaves, Alstom, ABB, BharatBijlee (Siemens). The manufacturer shall have proper indoor complete test facilities at his works. Also haveproper quality control and good testing facilities in the company where they have outsourcedany item of the product. 8) 3.6 KV VACUUM CIRCUIT BREAKER PANEL AT TRANSFORMER ENDThe equipment shall conform in all respects to high standards of engineering, design andworkmanship. The equipment shall be complete with all components necessary for itseffective and trouble free operation along with associated equipments, interlocks, protectionschemes etc. The equipment will be used in high voltage system and will be installed outdoorin a hot, humid and tropical atmosphere. All equipment, accessories and wiring shall havetropical protection, involving special treatment of metal and insulation against fungus, insectsand corrosion. The maximum temperature in any part of the equipment at specified ratingshall not exceed the permissible limits as stipulated in the relevant standards. The equipmentshall be capable of withstanding the dynamic and thermal stresses of listed short circuitcurrent without any damage or deterioration. The safety clearances of all live parts of theequipment shall be as per relevant standards.
CONSTRUCTIONAL FEATURES The Vacuum Circuit Breaker shall be triple pole horizontal draw out type enclosed inPanel cabinet of CRCA sheet steel of 3 mm thickness for load bearing members and 2 mmthickness for non-load bearing members and shall comply with latest edition ofIS:13118/3427/IEC-56. Two coats of epoxy powder of desired colour and shade andminimum thickness of 100 microns will be given after specified pre-treatment process.The circuit breaker shall be equipped with power operated mechanism to operate all threephases simultaneously using 220/240V AC Motor charged spring operated closingmechanism or magnetic actuator type closing mechanism. A lockable Local/Remote switchshall be provided, apart from Trip-Neutral-Close (TNC switch) control switch to selectlocal/remote operation of the switchgear. The breaker control switch shall have Trip- Neutral-Close position spring return sequence locking mechanism. The breaker control switch andselector switch shall be mounted on the front side of cubicle and located at a convenientheight for easy operation. The operating mechanism links etc. should be accessible formaintenance. Suitable arrangement of earthing the switchgears shall be provided. All the connecting bus bars and current carrying parts shall be made of copper. Bus bars shallbe air insulated with PVC insulation/sleeves. The bus bars shall be of electrolytic gradecopper with permissible limits of current density. The bus bar conductors shall conform toIndian standard 8084 and 3427 and shall be continuously rated for 1250A / 2500A asrequired and shall have short circuit capacity of 25kA for 3 sec. The Bus bar joints shall be silver plated and bolted in such a manner that initial contactpressure around the square headed high tensile bolt will remain substantially undiminished at
all temperature up to rated full load temperature. The Bus support and bushings shall be ofepoxy resin cast type. All drop off from main bus to VCB and VCB to bushing terminationsshall be suitable for current rating of circuit breaker. All the bus bar shall be sleeved with heatshrinkable sleeves of 3.6KV voltage level and bus bar shall be shrouded wherever possible.All the bus bar joints shall be shrouded and where shrouding is not possible, it shall be tapedwith HV self-amalgamation tape. All the tap off bus bar connections inside panel and PTjumpers shall be sleeved with HT heat shrinkable sleeves. Special care shall be taken in thedesign of bus bar system to provide for thermal expansion and to minimize the chances of busfault. Bimetallic washers shall be provided at the joints of two different metal surfaces.The Panel cabinet shall be vermin proof and dust tight. The switchgears and Control gearsshall be complete with all necessary supporting frame works, Nuts and bolts etc. for securingthe same to the Panel mounting frames. Hinges of door shall be concealed type to avoidrusting and obstructive opening of the door. The quality of welding shall be good and thereshould not be any lumps and splatters on the panel. Panel gaskets shall be of chemicallytreated neoprene.
Provision should be made for AC shunt tripping arrangement, emergency shunt tripping fromremote place in addition to local emergency tripping (Mechanical). The power pack shall beprovided for 230/110 volt from the charging circuit side and output will be 48 volt DC for thetrip circuit. The panel shall also have a system to check the "Trip circuit healthy check" in allthe three phases. Necessary trip and closing coils shall be provided for operation of thebreakers. All electrical and mechanical interlocks which are necessary for safe andsatisfactory operation of the circuit breaker shall be provided. The panel shall be electricallyand mechanically trip free under various conditions.
Creepage distance: Phase to phase / phase to earth clearances shall be as specified in theIS/IEC. All the six power terminals shall be brought out through high class suitable typebushings, designed manufactured & tested in accordance with latest edition of IS:2099. Thebushings shall be designed to have the necessary mechanical strength and rigidity requiredand shall be free from objectionable interference and external and internal corona. Thebushing shall not be subjected to direct point loading. They shall be provided with neckaround clamps for evenly distributed pressure. The bushing shall be mounted using suitableclamps and gasket arrangement to provide required degree of protection. The bushingassembly shall be provided with lock nut and check nut which will be nonmagnetic and non-corrosive.
The following shall be provided for the outdoor VCB Panel:Sr. No. Particulars Qty
1 Mechanical ON/OFF indicator. 1 No2 Operating handle for independent manual closing mechanism 1 No3 Red indicating lamp for ON indication 1 No4 Green indicating lamp for OFF indication 1 No.5 Numerical 3 O/C + E/F relay 1 No.6 Numerical SC relay 1 No.7 240 V AC single phase 80 or 100 watt anti condensation heaters
with thermostat and switch2 Nos
8 Automatic door illumination lamp with switch 1 No.9 Single phase 3.6 KV Current Transformers ratio 600/5-5A , or
1600/5-5A as required, suitable for metering and protection shallbe provided. The class of accuracy shall be 0.5 for metering and
3 Nos
5P15 for protection. Rated burden (output) shall be 15 VA for eachsecondary winding
10 (3600/√3)/(110/√3) V single phase voltage transformers eachhaving 100 VA/phase burden & class of accuracy 0.5 suitablyconnected to meters and indicating instruments etc.
3 Nos
11 NET METERING with required type and ratings CTs and PTs andother accessories duly calibrated and certified by the relevantAuthority; on the 2500 A VCB Panel at Pump Room
1 set
12 Indicating lamps coloured Red, Amber and Blue for PT supply 3 Nos13 Test terminal blocks to test meters and relays with sealing
arrangement2 Nos
14 Self auxiliary plug and socket 1 set15 Ground bus system, size 50x6mm copper may be provided and the
earthing stud shall be capable of withstanding rated short circuitcurrent and stud design shall be as per IS-133427 or IEC -200
1 No.
16 Audio-Visual Annunciations 1 No.17 Operation counter 1 No.18 Name plate at front and back of the Panel 1 No.19 3 phase air insulated main copper bus bar of 1250 A continuous
current rating having maximum current density 1.0 Amp./ MM2
STC rating 25 KA for 3 sec
1 set
20 Spring Charge Indication Lamp 1 No.21 Spare auxiliary contacts/switch having minimum 4 NO + 4 NC.22 Door locks with keys for all doors23 Pair of base channel for grouting in floor24 Arrangement to check healthy trip circuit in all three phases (separate lamps for
R phase, Y phase and B phase) be provided PROTECTION RELAYS :The circuit breaker shall be fitted with numerical relay having shunt trip coil for operation on3 over current & one earth fault element. The circuit breaker shall have suitable arrangementfor power supply of relay and breaker operation through shunt trip coil using power pack.The power pack shall be suitable for 6 Nos. closing/ tripping operations and for future remotecommunication as well as breaker testing during long time power failure. The charging ofpower pack shall be through 230 V AC supply available at Sub-Station. The numerical relaysshall have following features:-a. Self Diagnosisb. Minimum last five abnormal events recording (over current & earth fault) including faultlevel and phase along with date & time.c. On-line display of current.d. Communicable with open protocol having RS-485 port.e. The relay should contain four shots, three phase, programmable & auto reclose controlfeature. The relay shall be numerical type mounted in flush pattern on the panel board. Therelay should be rated for 110V AC as well as DC & 5 Amp. CT secondary. The relay shouldconform to latest IEC specifications. Relay TTB shall have trip bypass arrangement.All the relays shall be draw-out and provided with test blocks in panel so designed that therelays may be tested at site. The relays should have provision of testing either through testblock or test plug easily accessible by injecting the voltage /current/frequency (as applicable)from external testing instruments /source without first disconnecting/ re-energizing the
primary electrical circuit protected by the relays. Facilities for isolating the tripping circuitduring such testing shall also be provided.
INDICATING AND INTERGRATING METERS/INSTRUMENTS:All indicating instruments shall be panel mounting type, back connected suitable for flushmounting and provided with dust and vermin proof cases for tropical use and finished insuitable colour. The limits of errors for ammeters/voltmeter shall be permissible for class 1instruments as per IS: 1248. Digital ammeters and voltmeters shall be suitably scaled toindicate the current for all the ratings of current/voltage transformers. A phase selector switchwith four/six positions shall be used to measure the current/voltage of each phase. The metershall be located at eye level to facilitate observation of readings correctly. Any alarm schemeshall have both audio-visual annunciations in redundancy of each other and appropriateaccept and reset push buttons shall be part of alarm scheme.
TERMINAL BLOCKS:Terminal blocks shall be 650 V grade, box clamp type. Not more than two wires shall beconnected to any terminal. Spare terminals equal in number to 20% of active terminals shallbe furnished.Terminal blocks shall be located to allow easy access. Wiring shall be so arranged thatindividual wires of an external cable can be connected to consecutive terminals. TEST TERMINAL BLOCK:Two nos. test terminal blocks shall be provided one for testing of relays and other for testingmeters. The test blocks shall provide complete isolation of meters, instruments etc. and thearrangement shall be such that testing power could be connected at the test block from anyexternal source or may be taken from the instrument transformers. Provision shall be madefor short circuiting current transformers. Suitable sealing arrangement shall be provided intest terminal blocks.
INDICATING LAMPS (LED):Indicating lamps shall be provided on the control board to indicate the following:i) Visual indication of ON and OFF position of each circuit breaker.ii) supply indication.Each lamp body shall be of moulded insulation and shall be able to withstand a high voltagetest of appropriate value. All lamps shall be suitable for 240 V AC supply and shall have lowpower consumption and shall provide a wide angle of illumination of sufficient intensity forcomfortable viewing. A glass of appropriate colour shall be screwed into the front of lampbody. The design of indication lamp shall be such as to facilitate replacement of burnt lamps.An engraved label indicating the purpose of the lamp shall be provided with each lamp.
WIRING :All wiring shall be of switch board type consisting of copper conductor of 2.5 sq.mm crosssection insulated with polyvinyl chloride insulation suitable for 660V service and inaccordance with relevant IS:732. Polyvinyl chloride used shall have excellent resistanceagainst burning, moisture, oil and vermin and shall be finished with clear colour. Allinstruments and panel wiring shall be of heat resisting and self extinguishing type incompliance with British Standard Practice/IS. Plastic or porcelain cleats of the limitedcompression type shall be used for holding wiring runs. All wires shall be suitable forbending to meet the terminal studs at right angles. Metal cases of all apparatus mounted on
the panel shall be separately earthed by means of copper wire or strips. The following colourschemes of the wiring shall be used as per IS:375.a) AC three phase circuits :i) No.1 phase : Red No.2 phase : Yellow No.3 phase : Blueii) Neutral conductor : Blackiii) Connection to earth : Green
TEMPERATURE RISE:The max. temperature rise of various parts of the circuit breakers when tested under ratedcondition shall not exceed the specified values at a peak ambient temperature of 50 deg. C.The breaker may be provided with silver plated contacts if necessary to meet the requirementof IS:13118/IEC:56 where higher temperature rise is permitted with silver plated contacts.The temperature rise of CTs and PTs shall also not exceed the permissible values as perrelevant Indian standards when corrected for max. ambient temperature at site.
COMPLIANCE TO IEC & IS The 3.6 KV vacuum circuit breaker panel shall conform to latest revisions with amendmentsof standards as under :
Codes DetailsIEC62271/100-200 High Voltage Switchgear & Control gearsIS : 13118/IS-3427 Circuit Breaker/ metal enclosed Switchgear and control gearIS: 3156 Voltage transformersIS: 2705 Current transformersIS: 3231 Electrical Relays for power systemIS:1248 Meters and Instruments
TESTS:The 3.6 KV vacuum circuit breaker panel and accessories shall be subjected at maker'sworks, to the following tests as per relevant IS/IEC.ROUTINE / ACCEPTANCE TESTS:(i) The following acceptance and routine tests shall be got conducted in presence of MCGM'srepresentative as per stipulation of the relevant standards on each unit.a) One minute power frequency voltage withstand dry test on main circuit.b) Voltage withstand test on control & auxiliary circuits.c) Measurement of the resistance of main circuit.d) Mechanical operating test.e) Design and visual checks.f) Checking wiring of circuits and their contacts.g) Insulation resistance of complete wiring, circuit by circuit with all equipment mounted onthe panels.h) Checking of operational protective schedule, instruments and meters
TYPE TESTS CONDUCTED ON ONE SIMILAR UNIT AS PER RELAVANTSTANDARDS:(i) Dielectric tests.a) Lightning Impulse Voltage Test.b) One Minute Power Frequency Test (Wet & Dry).(ii) Short time withstand current and peak withstand current test.
(iii) Basic short circuit duties test.(iv) Single phase short circuit test.(v) Mechanical Operation test as per M-2 class.(vi) Out of phase making & breaking test.(vii) Capacitive Current Switching Test.a) Cable Charging Test.b) Single Capacitor Bank Current Switching Test.(viii) Measurement of resistance of main circuit.(ix) Temp. rise test.(x) IP-55 Test (For cubicle/control cabinet).(xi) Any other type tests not specified above but covered as per amendment/latest edition ofrelevant IS/IEC.The type test reports of Circuit Breakers, Current Transformers, Potential Transformers,Relays, and Meters etc. shall be complete in all respects as per relevant IEC/IS.
TEST AT SITE:Following tests as per relevant standards shall be carried out on the 3.6 KV outdoor panel after installation before commissioning under actual service conditions.
a) Testing of relays by secondary injectionb) Testing of CTs ratio, polarities by primary injectionc) Functional operational checking and interlockingd) Programming of numerical relays as per requiremente) Hi-pot test of busbar.
The rating for VCB is should be as per IEC 62271-100. Technical details for Vacuum circuit breaker is as below.
Sr. No. Particular Data1 Rated Voltage &Frequency 3.6 kV, 50Hz2 Current Rating
a) Continuous rating in open area 1250A /as required b) Continuous rating in Self Ventilated cubicle. 1250A /as requiredc) Short time withstand current for 3 Sec. 40 kA rmsd) Dynamic peak withstand current 100 kA rms
3 Ref. Ambient Temperature 40 degree C4 Maximum rise of Temperature over
reference ambient for current ratinga) Contact in gas 65 degree Cb) Contact in air 65 degree C
5 De-rating factor for 50° C ambient 0.8Temperature
6 6) Rated Operating duty O – 3 min. – CO – 3 min. – CO7 Breaking capacity -
a) Symmetrical at rated voltage 40kA rmsb) Percentage DC component 35%
8 Transient recovery voltage –a) Rated of rise at 3.6kV As per IEC 62271 – 100b) Peak Voltage at 3.6kV As per IEC 62271 – 100
9 Number of breaks per pole One
10 Total Length of contact travel 12 mm11 Total Length of break per pole Approx. approx. 12 mm12 Rate of current travel
a) At tripping 1.1 to 1.6 m/sb) At Closing 0.7 to 1.0 m/s
13 Type of special device , used to limitthe rate of restriking voltage
14 Type of contactsa) Main Buttb) Arcing separate arching contactsc) Arc control device Required
15 Material of contactsa) Main Cr Cub) Whether contacts silver plated Preferred
16 Contact pressure (Final Closing) 400kg17 Insulating level of C.B.
a) One Minute Power Frequency withstand 25 kV Voltageb) Impulse voltage withstand with 1.2/50 75 kV peak
micro second wave shape18 Minimum Clearance in air
a) Between phase 110 mm (with phase barrier)b) Between live parts &earth 110 mmc) Center distance between phases 210 mm
19 Weather C.B. is designed to close and latch on making or fitted with making current release
20 Whether C.B. is trip free or fixed trip Trip free preferreda) If trip free, is it completely trip free yes ( preferred )
under every method of closing (exceptmanual closing )
21 Type of operating mechanisma) Motor or solenoid operate Spring wound bymotor preferredb) No of C.B. operations stored O – C – O
22 Spring charging motor detailsa) Rating 0.2KWb) Rated voltage 110V DC, 220V DC &230V ACc) Voltage variation 85 to 110%d) Time required to charge the springs 15 Sec. Max.completely at rated voltage
23 Method of closinga) Normal Electromagnetb) Emergency on C.B. front sheet Required
24 24) Type of closing mechanism Stored energy spring mechanism25 Closing coil details
a) Rated voltage 230 v ac
b) Voltage variation 85 to 110%c) Power required at rated voltage 180W
26 Type of trippinga) Normal Electromagnetb) Emergency Mechanical
27 Type of tripping mechanism Stored energyspring mechanism
28 Tripping coil detailsa) Rated voltage 230 V ACb) Voltage variation 70 to 110%c) Power required at rated voltage 180W
29 Arc durationa) Arcing time at 100% breaking capacity, max.15msb) Opening time 35-50 ms
c) Total break time at 100% breaking capacity,max 65 ms
30 Closing time, maximum 75 ms31 No. of openings C.B.is capable of performing without inspection replacement of
contacts or other main partsa) At no load or very low current 5000b) At 100% rated current 5000c) At 100% rated breaking current 50
32 Auxiliary contactsa) N/O and N/C contacts provided 6 NO+ 6 NCb) Whether convertible at site Preferredc) Breaking current (D.C.) and inductive circuit At 110 &220V DC respectively at L/R = 25 ms 5 &2 Ampsd) Breaking current AC and PF = 0.8 at 230V AC 10 Amps
33 Interlocks provided (As per IEC requirements) Required
34 CB operable ina) Test / Service position Requiredb) In between Test and Service position No
35 Weight of Circuit Breaker (Approx.) 190 Kg.36 Provision for slow closing for maintenance required
Purpose37 Rated Capacitive Breaking Current
a) Breaking Current As per relevant IECb) Making Current As per relevant IEC
38 Rated cable charging breaking current As per relevant IEC
Make: Vacuum Circuit Breaker shall have following makesM/s. ABB, GE, Siemens, Schneider.
9. Current Transformer (CT): Below table shows the technical requirement of Current Transformer
Sr. No. Particular Data1 Rated Voltage 3.6 kV2 Rated Primary current 1250 Amp3 Rated Secondary current 5/1 Amp, as required4 No. of core 3 in 3 CT type5 Rated output accuracy class and accuracy limiting
voltage 0.5 6 Secondary voltage knee point voltage secondary
limiting voltage/ISF <=57 Rated burden 15 VA8 1 minute power frequency withstand test 25 kV RMS9 Impulse test voltage 75 kV peak10 Ratio and phase angle error As per IS 2705
Type : Indoor (built in panel CT confirming to concern Indian standards )Make: Current Transformer shall have following makes.M/s. AE, Indcoil, Precise.
10. Potential Transformer (PT): Below table shows the technical requirement of Potential transformer
Sr. No. Particular Data1 Rated Primary Voltage 3.6 kV / √32 Rated Secondary Voltage 110 V / √33 No. of Secondary Winding 3 4 Rated burden of each phase 50 VA5 Accuracy class 0.56 Class of insulation Class-A7 Temperature rise at 1.1 times rated voltage with
rated burdenAs per IS 3156 Part 1/78
8 Rated voltage factor 1.2 cont9 Ratio and phase angle error As per IS 315610 One minute power frequency withstand test voltage 25 kV RMS11 Impulse withstand test voltage 75 kV peak
Type : Indoor (built in panel PT confirming to concern Indian standards)Make: Potential Transformer shall have following makes.M/s. AE, Indcoil, Precise.
11) 3.6kV Outdoor Junction Box: HT OUTDOOR JUNCTION BUS CHAMBER WILL COMPRISE OF:Incoming Cables: Provision for terminating 2 nos. of 3C 400 mm2 XLPE aluminium cablescoming from VCB 1 and VCB 2 (1 cable per VCB). Outgoing Cables: Provision for terminating 1 number of 3C 400 mm2 XLPE aluminum cablesgoing to VCB panel in 3.6 kV Old pumping station. INTERCONNECTIONS: Between the incoming and the outgoing cables with copper busbars. The equipment shall conform in all respects to high standards of engineering, design andworkmanship. The equipment will be used in high voltage system and will be installedoutdoor in a hot, humid and tropical atmosphere. All equipment, accessories and wiring shallhave tropical protection, involving special treatment of metal and insulation against fungus,
insects and corrosion. The maximum temperature in any part of the equipment at specifiedrating shall not exceed the permissible limits as stipulated in the relevant standards. Theequipment shall be capable of withstanding the dynamic and thermal stresses of listed shortcircuit current without any damage or deterioration. The safety clearances of all live parts ofthe equipment shall be as per relevant standards. The cowling provision shall be made on theroof of 3.6 KV outdoor VCB panel to avoid direct inception of water at any joint.
CONSTRUCTION FEATURES The HT Junction Box cabinet shall be of CRCA sheet steel of 3 mm thickness for loadbearing members and 2 mm thickness for non-load bearing members and shall comply withlatest edition of IS:13118/3427/IEC-56. Two coats of epoxy powder of desired colour andshade and minimum thickness of 100 microns will be given after specified pre-treatmentprocess.
All the connecting bus bars and current carrying parts shall be made of copper. Bus bars shallbe air insulated with PVC insulation/sleeves. The bus bars shall be of electrolytic gradecopper with permissible limits of current density and having size (10x50mm) x 2 per phaseand (10x50mm) x 1 for neutral. The bus bar conductors shall conform to Indian standard8084 and 3427 and shall be continuously rated for 1250A / 2500A as required and shallhave short circuit capacity of 25KA for 3 sec.
The Bus bar joints shall be silver plated and bolted in such a manner that initial contactpressure around the square headed high tensile bolt will remain substantially undiminished atall temperature upto rated full load temperature. The Bus support and bushings shall be ofepoxy resin cast type. All drop off from main bus to bushing terminations shall be ofappropriate current rating. All the bus bar shall be sleeved with heat shrinkable sleeves of3.6kV voltage level and bus bar shall be shrouded wherever possible. All the bus bar jointsshall be shrouded and where shrouding is not possible, it shall be taped with HV selfamalgamation tape. All the tap off bus bar connections shall be sleeved with HT heatshrinkable sleeves. Special care shall be taken in the design of bus bar system to provide forthermal expansion and to minimize the chances of bus fault. Bimetallic washers shall beprovided at the joints of two different metal surfaces.
The HT Junction Box cabinet shall be vermin proof and dust tight. Hinges of door shall beconcealed type to avoid rusting and obstructive opening of the door. The quality of weldingshall be good and there should not be any lumps and splatters on the panel. Gaskets shall beof chemically treated neoprene.
Creepage distance : Phase to phase / phase to earth clearances shall be as specified in theIS/IEC.
All the power terminals shall be brought out through high class suitable type bushings,designed manufactured & tested in accordance with latest edition of IS:2099. The bushingsshall be designed to have the necessary mechanical strength and rigidity required and shall befree from objectionable interference and external and internal corona. The bushing shall notbe subjected to direct point loading. They shall be provided with neck around clamps forevenly distributed pressure. The bushing shall be mounted using suitable clamps and gasketarrangement to provide required degree of protection. The bushing assembly shall beprovided with lock nut and check nut which will be nonmagnetic and non-corrosive.
The following shall be provided for the outdoor HT Junction Box:Sr. No. Particulars Qty
1 R Y B indicating lamps for ON indication 1 No.2 240 V AC single phase 80 or 100 watt anti condensation heaters
with thermostat and switch2 Nos
3 (3600/√3)/(110/√3)single phase voltage transformers eachhaving 5 VA/phase burden for indicating lamps
3 Nos
4 Ground bus system, size 50x6mm copper may be provided andthe earthing stud shall be capable of withstanding rated shortcircuit current and stud design shall be as per IS-133427 or IEC-200
1 No.
5 Name plate at front and back of the Panel 1 No.6 Pair of base channel for grouting in floor
TERMINAL BLOCKS :Terminal blocks shall be 650 V grade, box clamp type. Not more than two wires shall beconnected to any terminal. Spare terminals equal in number to 20% of active terminals shallbe furnished. Terminal blocks shall be located to allow easy access. Wiring shall be soarranged that individual wires of an external cable can be connected to consecutiveterminals.
INDICATING LAMPS :Indicating lamps shall be provided on the HT Junction Box to indicate the following:i) Supply indication.Each lamp body shall be of moulded insulation and shall be able to withstand a high voltagetest of appropriate value. All lamps shall be suitable for 240 V AC supply and shall have lowpower consumption and shall provide a wide angle of illumination of sufficient intensity forcomfortable viewing. A glass of appropriate colour shall be screwed into the front of lampbody. The design of indication lamp shall be such as to facilitate replacement of burnt lamps.An engraved label indicating the purpose of the lamp shall be provided with each lamp.
WIRING :All wiring shall be of switch board type consisting of copper conductor of 2.5 sq.mm crosssection insulated with polyvinyl chloride insulation suitable for 660V service and inaccordance with relevant IS:732. Polyvinyl chloride used shall have excellent resistanceagainst burning, moisture, oil and vermin and shall be finished with clear colour. All wiringshall be of heat resisting and self extinguishing type in compliance with British StandardPractice/IS. Plastic or porcelain cleats of the limited compression type shall be used forholding wiring runs. All wires shall be suitable for bending to meet the terminal studs at rightangles. Metal cases of all apparatus mounted on the HT Junction Box shall be separatelyearthed by means of copper wire or strips. The following colour schemes of the wiring shallbe used as per IS:375.a) AC three phase circuits :i) No.1 phase : Red No.2 phase : Yellow No.3 phase : Blueii) Neutral conductor : Blackiii) Connection to earth : Green
12. Surge arrestors and Lightning arrestors: Surge Arresters The surge arresters shall conform to the latest amendments of the standards as below:
* IEC 99-4 Specification Part 4 for Surge Arresters without gap for AC system. * IS : 3070 (Part-III) Specification for Lightning Arresters for alternating current
System.* IS : 2629 Recommended practice for hot dip galvanizing of iron and steel.* IS : 2633 Method for testing uniformity of coating on Zinc coated articles.* IS : 5621 Specification for large hollow porcelain for use in electrical installation.* IS : 2147 Degree of protection provided by enclosures for low voltage switchgear
and control gear.* Indian Electricity Rules 1956
Specific Technical Requirements for Metal Oxide (Gapless) Surge Arresters:
Sr No. Particulars Data
1 Rated Arrester Voltage (kV) 12 kV2 M.C.O.V.(kV rms) 10 kV3 Installation --------Outdoor---------
4 Class.--- Station Class Heavy duty---
5 Type of construction-- Single column, single phase --
6 Nominal Discharge current corresponding to 8/20microsec wave shape
(kA Peak) - 10kA
7 Type of mounting Pedestal8 Connection ( Between Phase to earth (Between phase to
phase P/P) P/E) - P/E9 Line discharge class. 210 Ratio of switching impulse residual voltage to rated
Voltage of arrestorAs per provision of IEC 99-4 (latest amended)
11 Minimum prospective symmetrical fault current forpressure relief test
40 (kA rms)
12 a) Terminal connector suitable for ACSR conductor size.Single dogb) Take Off
Single dogFor both vertical and horizontal
13 Voltage (corona extinction) (Kv rms)----Rated voltage of the Arrester-
14 Partial dischargeAs per provision of IEC 99-4 (latest amended)
15 Whether insulating base and discharge counter with mili-Ammeter are required No
16 Minimum creepage distance of Arrester housing (mm) 900
Lightning ArrestersThe lightning arresters shall conform to the latest amendments of the standards as under :The Lightning Arrestors shall conform to IEC-99-4 document or its latest amendment andIS/IEC as follows:
Codes DetailsIEC-99-4 Gapless Lightning ArrestorIS 3070 P-III Metal Oxide Surge Arrestors without gaps for AC SystemsIEC 99 P-III Artificial Pollution Testing of Lightning ArrestorIEC 270 Partial Discharge Measurement.IS 2071 Methods of H V TestingIS 6209 Methods for Partial Discharge MeasurementIS 5621 Hollow Insulators for use in electrical equipment
Duty requirement:* The Lightning Arresters shall be capable of discharging Lightning and switching surges
and temporary power frequency over voltages .The Arresters shall be capable ofdischarging over voltages occurring during switching of unloaded transformers and longlines.
* The Arresters shall be capable of withstanding Maximum Continuous Operating Voltages(M.C.O.V).
* The Arrestors supplied shall be suitable for heavily polluted atmosphere.* The reference current of the Arrestors shall be high enough to eliminate the influence of
grading and stray capacitance on the measured reference voltages.
Fittings & accessories:Arrestor rating upto 12 kV shall be directly mounted on structure. Each single pole arrestorshall be provided with suitable name plate, at the base with the following data:* Clamp type terminal connector shall be suitable for either ACSR /AAAC DOG/WOLF
Conductor for 12 kV and DOG / RABBIT Conductor for 10 kV system voltage class L.A.having horizontal / vertical take off.
* Two ground terminal connectors suitable for G.I strip of required size shall be provided ondiagonally opposite sides.
* Necessary hardware such as nuts, bolts, spring washers, etc. shall be supplied fordifferent units.
* 12 kV Lightning Arrester should be of Distribution Type and should have suitable FaultIndicator.
Constructional features:* The arrester elements shall be designed in such a way as to obtain robust construction
with excellent mechanical and electrical properties even after repeated operation. Thelightning arresters should be adequately designed to operate satisfactorily undertemporary power frequency over voltage as given in Specific Technical Parameters, afterdischarging two shots of respective long duration surges. Uniform density of zinc oxideelement shall be maintained to provide uniform current distribution.
* The lightning Arresters shall be of adequate Pressure Relief Class as per IEC-99-4 , fittedwith Pressure Relief Devices and Arc diverting ports to minimise possibilities ofshattering of porcelain housing.
* Sufficient creepage distance shall be provided to reduce excessive uneven voltages overthe porcelain due to contamination, for which the arrestor shall not fail.
* Seals shall be provided in such a way that these are always effectively maintained evenwhen discharging the maximum rated lightning current.
* Housing of Insulators shall be of Porcelain, glazed and completely vitrified and free from
blowholes, micro-cracks or void. Porcelain, housing shall be so coordinated that externalflashover will not occur due to application of any impulse or switching surge voltage upto the maximum design value for the arrestor.
* The end fittings shall be made of non-magnetic and corrosion proof material. It ispreferable that the LAs shall be hermetically sealed with inert gas (Nitrogen).
* Arresters shall be suitable for mounting on a support structure. * 12 kV Class Distribution Type Lightning Arrester should have provision for Fault
Indicator / Disconnector.
Testing:Each LA shall comply with the requirements of routine test as specified in the relevantIEC:99-4 & IS:3070 (Part - III) .Specific Technical Requirements of Lightning Arrestors:
Sr. no. Type of arrestor Distribution Class i) Nominal system voltage (kV) 3.3ii) Highest system voltage (kV) 3.6iii) System Neutral Earthing EEiv) BIL of transformers (kVp) 75v) System fault level (kA) 16vi) Maxm. System BIL (kVp)
LA RATINGS :i) Rated Voltage (kV) 3.6ii) Maxm. Continuous operating voltage (kVrms) 3.3iii) Nominal Discharge Current (kAp 5iv) Line discharge class Distribution Classv) Minimum Energy Discharge capability (KJ/kV) 5vi) Temporary over voltage withstand capability (kVrms)
for 10.0 secs 12vii) Insulation Housing withstand voltage Minimum values as per IECviii) Minimum creepage Distance acceptable (mm) 300
i) Pressure Relief Class To be tested in accordance with IEC
ix) (Minimum) High Current Impulse withstand (4/10) kA(peak)
65
x) Maxm.Lightning Impulse (8/20 microsecond impulse) residual voltage (kVp) : 5kA
34
xi) Maxm. switching surge (30/60 microsecond wave) protective level (kVp) 500 Amps
21
xii) Maxteep Impm. Sulse (1/20 micro-secondsimpulse) residual voltage at 10 ka (kVp)
28
xiii) RIV/Partial Discharge (micro-volt / picocoulomb)when energised at 1.05 times itscontinuous operating voltage shall not exceed
1000 microvolt/ lessthan 500 pico - coulomb
xiv) Terminal connection ACSR Conductor (7 Strand),Dog/Rabbit
xv) Rated Frequency (Hz) 50Make: Surge and Lightning arrestors shall have following makesElectrolytes (Power) Pvt. Ltd.13. Earthing and Lightning Protection:The Earthing System should be designed, installed and tested in accordance with the latest
revision of Indian Standards.* IS 3043 : Code of practice for earthing. * IS 2309 : Code of practice for protection of Building and allied structures against
lightning.* IEEE Standard 80-2000 : Guide for safety in alternating current substation grounding.The soil resistivity should be considered while designing the earthing system. Switchyardshould be provided with a complete earthing system, comprising of buried earth grid for safelimits of step and touch potentials along with earth electrodes.
EarthmatThe design of earthing mat should be such that the safe values of touch, step and transferredpotential are maintained within the specified limits . Also the combined resistance of earth inthe station should not exceed 1.0 ohm (maximum). Earth electrodes should be provided asrequired and connected to earthing mat to achieve the desired value, if consideredappropriate. The earth mat design should comply to IEEE80, 2000.
Main earth mat conductors should be laid minimum 650mm below the ground level, howeverto achieve the safe values the depth of main conductor should be accordingly adjusted. All theEquipments , structure and towers should be earthed by running main and duplicate earthingconductor from the equipment base along structure to the main mat. Mat should be formed bywelding.
Minimum spacing of 3000mm between earth electrodes should be maintained. Wheneverearthing conductors cross cable trenches, underground services ducts, pipes, tunnels, railwaytrack, ect. It should be laid minimum 250mm below them and should be re- Routed in case itfouls with foundations.
Tap – connection (risers) from the earthing grid to the equipment/structure to be earthedShould be terminated to the earthing terminals of the equipment , if the equipment isAvailable at the time of laying the grid. Otherwise, “earth insert” shall be provided near Theequipment foundation/pedestal for future connections to the equipment earthing terminals.
Earthing conductors along their run on cable trench ladder, columns, beams, walls, ect.Should be supported by suitable welding/cleating at intervals of 750mm. Earthing conductorsalong trenches should be on the wall nearer to the equipment. Cable trays and supports shouldbe connected to the earth mat at every 30 meter interval. Wherever it passes through walls,floors etc. Galvanized iron sleeves should be provided for the passage of the conductor. Bothends of the sleeve should be sealed to prevent the passage of water through the sleeves.
Earthing conductor around the building should be buried in earth at a minimum distance Of1500 mm from the outer boundary of the building. In case high temperature is encountered atsome location, the earthing conductor should be laid minimum 2000 mm away from suchlocation.
Earthing conductors wherever crossing the road should be laid at 1000mm below level.Earthing conductors embedded in the concrete floor should have approximately 50 mmconcrete.
The connection between earthing pads of equipment and the earthing grid should be made byShort and direct earthing lead free kinks and splices. In case earthing pads are not Provided
on the equipment to be earthed, same should be provided in . Steel/RCC columns, metallicstairs ect. Should be connected to the nearby earthing grid conductors by two earthing leads.Electrical continuity should be ensured by bonding the different sections of hand-rail andmetallic stairs.
Metallic pipes, conduits, and cable tray section for cable installation should be bonded toensure electrical continuity, beginning point should be connected to earthing systems.Metallic conduits and water pipes should not be used as earth continuity conductor.
A separate earthing conductor of 1sq.mm of copper wire ,green PVC insulated should beProvided for earthing of lighting circuits, light receptacles , switch , junction boxes, Lightingconduits, switchboxes, sockets ect and 2.5Sq .mm copper wire green PVC Insulated forpower circuits.
Wherever earthing conductor crosses or runs along metallic structures as gas, water, steamConduits, pipes, or steel reinforcement in concrete, it should be bonded to the same.
Lighting poles, junction boxes on the poles, cable boxes /glands, lockout switch ect. Shouldbe connected to the earthing conductor running along the supply cable /earth grid Which inturn, should be connected to earthing grid conductor at minimum two points .
Substation earthing conductor should be extended minimum 1000 mm outside the substationFence on all the sides. Every alternate post of the fence and gates should be connected to theearthmat.
Flexible earthing conductors should be used wherever earthing of moving parts (handles) areto be connected to the earthmat.
Metallic sheaths and armour of all multi core power cables should be earthed at bothequipment and switchgear ends. Sheath and armour of single core power cables (if any)Should be earthed at switchgear end only.
Specific Requirements for Earthing SystemsEach of the earthing leads from the neutral of the power transformer should be directlyConnected to an independent pipe electrode in treated earth pit , which in turn should beconnected to station earth mat.Auxiliary earth mat of 1.5 m X 1.5 m grid should be laid below transformer to be connectedto the main mat . Auxiliary mat should be provided at a depth of 300 mm from ground belowthe MOM box of Isolator , MOM should be directly connected to auxiliary mat.Earthing terminals of each lightning arrestor & capacitive voltage transformer should bedirectly connected to electrode which in turn should be connected to earth mat. Each rail oftransformer rail track should be earthed to the main mat at least at two locations.For lightning arrester, only one earthing conductor from the equipments earthing terminalshould run through surge monitor to an independent earth electrode. Main and duplicateearthing conductors are required for LA structure earthing.Earth pit construction should be as per relevant IS. All earth pits should be filled withhomogenous layers of coke, charcoal, salt and sand. Pipe electrodes shall have funnel andwire mesh arrangement on its top. The electrode shall be enclosed in a cement pit with a castiron cover hinged to a cast iron frame.If the earthing mat extends right upto the fencing or where electrical isolation between the
earthing mat and fencing cannot be ensured, but the design calculation reveal that the valuesof touch potentials both from within and outside the fenced-in area are within safe limits,fencing should be connected with the earthing mat at frequent intervals.Two nos. earth pits should be provided for transformer neutrals. Neutral will be connected by50X6 mm copper strip and then copper plate electrode.Earthing coils should be fabricated from soft GI Wire Hot Dip Galvanized. The Hot Dipgalvanized wire should have clean surface and should be free from paint enamel or any otherpoor conducting material. The coil should be made as per REC constructions standard. TheHot Dip galvanizing should conform to IS: 2629/1966, 2633/1972 and 4826/1969 with latestamendments.JointingEarthing connection with equipment earthing pads should be bolted. Contact surface shouldbe free from scale, paint, enamel, grease, rust or dirt. Two bolts should be provided formaking each connection. Equipment bolted, connected, after being checked and tested shouldbe painted with anticorrosive paint/compound.
Connection between equipment earthing lead and main earthing conductor should be welded ,brazed type for rust protection, the welds should be treated with red lead and compound toprevent corrosion. Steel to copper connection should be brazed type and should be treated toprevent moisture Ingression.
Resistance of the joint should be more than the resistance of the equivalent length of the conductor.All ground connections should be made by electric arc welding. All welding joints Should be allowed to cool down gradually to atmospheric temperature before Putting any lead on it artificial cooling should not be allowed. Minimum welding length should be twice width of ground strip.Auxiliary earth mat of 1.5mm x 1.5mm grid should be laid below transformer to be connected to the main mat. Auxiliary mat should be provided at a depth of 300mm from ground below the MOM. Box of isolators, MOM should be directly connected to auxiliary mat.Earthing Inside Control RoomAll the panel inside the control room should be earthed by running a main earthing conductorall around, inside the control room along the wall and by connecting two earthing leads fromeach panel to this main conductor.This main earthing conductor should be connected to twoearth pits as well as connected to the switchyard earthmat.All lighting systems should be earthed as specified in “Equipment & Structure Earthing”.TestsFollowing tests shall be carried out for earthing system:Galvanizing Tests: Minimum Mass of Zinc On GI Wire used 280 cm/m² After Coiling-266gm/m².Dip Test: Dip test shall stand 3 dips of 1 minute and one dip of ½ minute before coiling and 4
dips of 1 minute after coiling as per IS: 4826/1979
Adhesion Test: As per ISS 4826 – 1979.Lightning Protection SystemThe lightning protection systems should be with spikes to be put on the structure at 4-5locations. Conductors of the lightning protection systems should not be connected to theconductors of the safety earthing systems above ground level. Down conductor on thestructure should be clamped at every 750 mm interval. Connectors between each downconductors and the earthing lead from rod electrode earth pit should be located approximately300mm above ground level. Lightning conductors should not pass through or run inside G.I
conduits.Sub- station Lightning ProtectionSubstation lightning protection should be obtained by overhead shield wire connected to thepower peaks and the internal/external angle of protection should be provided as per the ISand it should be ensured that the entire substation equipment & the bus bars are adequatelyprotected. Protection zoning diagram should be prepared to ascertain the adequacy ofshielding.14. Relay Protection Scheme: The relay protection scheme proposed for this plant is shownin drawing section. The data required for a relay setting study are:* A one-line diagram of the power system involved, showing the type and rating of the
protective devices and their associated current transformers. * The impedances in ohms, per cent or per unit, of all power transformers, rotating
machines and feeder circuits. * The maximum and minimum values of short circuit currents that are expected to flow
through each protective device. * The starting current requirements of motors and the starting and stalling times of
induction motors. * The maximum peak load current through protective devices. * Decrement curves showing the rate of decay of the fault current supplied by the
generators.* Performance curves of the current transformers.* The relay settings are first determined so as to give the shortest operating times at
maximum fault levels and then checked to see if operation will also be satisfactory at theminimum fault current expected. It is always advisable to plot the curves of relays andother protective devices, such as fuses, that are to operate in series, on a common scale. Itis usually more convenient to use a scale corresponding to the current expected at thelowest voltage base or to use the predominant voltage base. The alternatives are a commonMVA base or a separate current scale for each system voltage.
* Whenever possible, use relays with the same operating characteristic in series with eachother.
* Make sure that the relay farthest from the source has current settings equal to or less thanthe relays behind it, that is, that the primary current required operating the relay in front isalways equal to or less than the primary current required operating the relay behind it.
Make: Protective Relays shall have following makesM/s. Alstom, Areva, ABB, Schneider and GE.
15. POWER EVACUATION STRATEGYBhandup Complex Water Treatment Plant is receiving HT Power supply through 110 KVGrid feeding from two locations i.e. Salsette and Kolshet. Through the 110 KV substation, thepower is fed to old and new Pumping station and also fed to other electrical installations ofthe plant. Bus bar and HT and LT panels etc is readily available at the old Pumping station. At present, solar power generated through existing 2.5MWp solar power plant is evacuated tosecondary side bus (3.3kV) of electrical network of Bhandup Complex. Therefore, on thesame ground, it is proposed to evacuate the solar power generated to the grid through existingsupply system at the old pumping station.
16. STANDARD METERING1. Standard metering shall be provided on the VCB panels. Two meters each i.e. main
and back up meter shall be provided on the VCB panels to measure the power feedfrom the solar power substation. The meter shall have sufficient memory for datastorage of minimum 6 month capacity. An energy meter shall also be installed inbetween the solar grid inverter side to measure gross solar AC energy production.
2. Energy meters shall also be provided on the AC side of the inverters to measure thepower generation and monitoring of solar power panel outputs.
3. All the meters recommended shall be user friendly, manufactured as per prevailingnorms of energy metering, recommended for use as a net meter in India, acceptable asper Maharashtra Electricity Regulatory Commission (MREC) and local electricitydistribution company norms. Make of the meters which are in use in grid interactivecaptive PV solar power plants in India for minimum last five years shall only beconsidered for use at this plant.
17. ENERGY MANAGEMENT SYSTEMThe energy management system shall be designed so that following energy management will be possible:
a) Monitoring, recording and analysis of solar power generation at each string.b) Monitoring, recording and analysis of solar power generation at inverter end. c) Monitoring of transformer parameters. d) Recording of power and energy at power evacuation point with minimum 3 months
memory.e) Recording of power and energy at grid feeding point where net meter and back up
meter is proposed to be provided with minimum 3 months memory.f) The system shall be self-sufficient to record and evaluate all energy and power
parameters as well as instantaneous solar power generation and maintaining hourly,daily, weekly, monthly, and yearly basis and record of power generation, Power andenergy feed to the grid, power drawn from the grid along with power factor,maximum demand, instantaneous demand, connected load. The system shall alsomonitor greed parameters and inverters continuously.
g) Tailor made graphics software for various graphical presentations.TECHNICAL DETAILS OF THE SYSTEM ARE AS BELOW
1. SITC of Server Power edge R420 data logging. Make M/s HP, IBM or DELL2. Supply, installation, testing & commissioning of software SCADA platform COBA of
M/s LONIX or similar features software. Server Software shall be versatile softwareplatform integration and interoperability of building systems. Beyond normalSCADA, it should provide transparency to the building management security systemsthrough one uniform interface. The software shall expands through drivers to a widerange of existing and future systems protocols, including e.g. Lon Works, BACnet,Modbus, M-Bus and others. Features: System Integrations, Graphical UserInterference, Profiles and User Rights, Alarm Handling, Trends and Event Logs,Monitoring and Reporting. For 20000 points, 2 users.
3. Modbus converter RS485 Serial-to-Ethernet Device Servers.4. 32 port switch / 16 port switch.5. Enclosure panel for housing switches, transformer, controllers rails internal wiring
with installation accessories.6. SITC of 2 core 1.5sqmm shielded armoured cable.7. SITC of CAT6 armoured cable for communication.8. Cable tray as required.
18. Weather Monitoring Station:Specifications for Weather Monitoring Station is as follows:
1. Two Pyranometers with 15-ft cables and prewired connectors. 2. Wind Speed and Wind Direction Sensor with a 15-ft cable and a prewired connector. 3. Relative Humidity & Ambient Air Temperature Probe with a 15-ft cable and prewired
connector.4. Surface Mounted Thermistor to Measure Solar Panel Temperature. 5. Ambient Dust Monitor (0 to 100 mg/m3, 0.1 to 100 micron). 6. Data logger support software.
19. Civil Works and Fencing:
SITE CLEARANCEPrior to the start of any activity SITC of pv solar power panels on the top of MBR, the areashall be cleared of shrubs, vegetation, grass, brushwood and saplings of girth. All rubbishmust be removed and stacked at a distance of 50m outside the periphery of the area underclearance or location. The rate of such clearance is to be included in the rate of other earth-work items and no separate rate shall be paid. Treaming of shrubs and trees touching theboundary and periphery of both MBR shall also be carried out as per MCGM norms so thatsolar power generation shall not be affected.
STRUCTURAL STABILITY CHECK AND SOIL TESTINGNew MBR is constructed and commissioned in the year 2012. The structure is sufficientlystable and having the capacity to bear load of solar panel and other equipment’s without anyissue. They are bound to serve next 25 to 30 years to MCGM. However, it is recommendedthat the contractor shall also carry structural stability test for new MBR. Cost of those testshall be included in the tender and no extra payment will be made towards this tests.Necessary drawings and information will be provided by MCGM. The contractor shall undertake the work of surface dressing trimming of natural ground,excavated surfaces and filled up areas to remove vegetation and/or small inequalities as andwhen required.TRENCHES FOR PIPES/CABLESIt shall be detailed with normal diameter of pipe/cable. Required bottom width, allowance forconcrete foundation for laying pipes, working area, grip required for socketed pipe, returnfill, ramming and removal of surplus soil shall be part of this item unless otherwise specified. CARE TO BE TAKEN BY THE CONTRACTORWhole working on the surface of the water tank regular working of the system shall not bedisturbed. Care must be taken not to damage surface or any part of the water tank. All civilwork shall be carried out under the supervision of the competent authority. DESIGN CRITERION FOR CIVIL STRUCTUREIt is proposed to provide of outdoor type of transformers and VCBs for this power plant. Thesubstation shall have complete fencing MS gate. Each substation will need the following civil/mechanical structure:
1. Transformer foundation – 2 nos (at new MBR)2. Foundation and footings for VCB panels - 2 nos (at new MBR)3. Shed to VCB panel.4. Complete fencing with MS gate to the substation as per details provided in the tender. 5. Cable trench between substation at new MBR up to new pumping station cable trench.6. Working area nearby the electrical substation shall be provided with a lime mortar bed
to avoid water logging, proper working area etc. Cable Trench:The layout and size of cable trenches and cable pipes shall be detailed in the subsequent data
sheets. The top of trenches should be kept at least 100 mm above the gravel level so that rainwater does not enter the trench. Trench walls should be designed for the following loads:
1. Dead load of 155 kg/m length of cable support +75 kg on one tier at outer edge of tier; &
2. Earth pressure + uniform surcharge pressure of 2T / M2Trenches should be constructed in reinforced cement concrete of M-20 grade. Galvanizedangle iron 50 x 50 x 6 mm welded with galvanized iron flat 50 x 6 mm – 75 mm long @1meter c/c to hold the angle on top of the trench walls should be provided for protection ofthe edges. All metal parts inside the trench should be connected to the earthing system.Outdoor RCC cable trench should be constructed in the switchyard and outside and pre-castRCC removable covers with lifting arrangement, edge protected with suitable galvanizedangle iron designed to withstand self-weight of top slab + concentrated load of 150 kg atcenter of span on each panel.The trench bed should have adequate slope for Trench Drainage.For Trench - Road Crossings, Suitable box culvert (Single span or multi spans) should beprovided. The box culvert should extend 1.5 m on each side of road and should have 230-mmwide, 500 mm high brick parapet wall at ends. The bed of trench on both sides of culvertshould be lowered in slope, in 1.5 m length to meet the bed of culvert.
BeddingWorking area nearby electrical substations shall be provided with a lime mortar bed.This gives workability and helps achieve dead accurate levels. Lime mortar in a ratio of 1:2(1 lime; 2 sand) shall be provided for bedding. Mortar mix shall be prepared in mechanicalgrinder wheel mixer. Manual mixing shall not be permitted. Hardened structural slab shall bethoroughly wire brushed, hacked with mechanical scabler to remove all scum, laitance ofcement mortar and allowed to expose coarse aggregate. Surface shall be wetted and cleanedthoroughly. Mortar shall be spread uniformly, tamped and leveled with a 3 m straight edge.The bed shall be keyed prior to finishing of the day‘s work. Thickness shall be specified butat no point shall the bed be less than 10mm.A thick cement slurry/ paste shall be spread over the bedding and cleaned tiles laid over thisgrouted area. Grouting shall be such that the area is covered within 15-20 minutes. Jointsshall be as thin as possible and limited to 2 mm at the maximum. Laying shall start after dueconsideration is given to following points:1) Datum levels of floors in rooms, adjacent rooms, passages, etc.2) Tiles in openings and doors are equally placed.3) Tiles in room shall be symmetrical and equal cut tiles shall be around the edges.4) Passage may be laid first to achieve evenness in doors5) In case of differently colored tiles in passages and rooms, a dividing strip shall be providedand changeover of color shall be under the shutter6) In case there is any other architectural or structural feature, the same shall be consideredand the pattern adjusted accordingly7) Tiles may be allowed to go under plaster or dado about 10 mmAfter the tiles are laid, surplus cement surplus cement slurry from the joints shall be cleaned.The following day the joints shall again be cleaned, washed and wire brushed. Grouting ofjoints shall be carried out with colored (pigmented cement) cement or grey cement thatmatches the color of tiles. Grout shall be worked into joint. Excessive grouts shall be cleanedoff. Grout shall be prepared by mixing quartz powder with colored cement.The floor shall be kept wet for a period of 7 days. No traffic shall be allowed on the beddingand bedded tiles for at least 2 days.
PolishingPolishing and grinding shall be done only after tiles are fully cured. Machine cutting andgrinding shall be carried out. At first the grinding shall be with rough stone. All the chipsshall be visible and grinding shall be uniform. It shall be cleaned with water. All pin-holesand opened out joints shall be grouted with matching colored cement grouts supplied by thetile manufacturer. Second coat cutting /grinding and further polishing shall be done withcarborundum stone of various grades. The same procedure as for the first coat shall berepeated till curing is completed. Finally surfaces shall be polished with tin oxide to thesatisfaction of the architect.
Fencing: It is proposed to carryout following fencing work from security point of view.1. Barbed wire fencing as per details given below to the boundary wall of new MBR.2. Provision of fencing with MS gate for the proposed substation. The specifications for
the fencing is as follows.Chainwire:Chainwire shall be 1800mm high and consist of individual wire pickets helically wound andinterwoven to form a continuous chain link having a 50mm nominal mesh. Wire shall be2.50mm diameter, heavily galvanized, or 2.50mm galvanized core P.V.C. coated (green orblack).Barbed Wire:Barbed wire shall be double strand twisted together with 1.60mm diameter 4 point babs at 75-100mm centers. All high tensile heavily galvanized.Ties:Chainwire shall be securely fixed to tension wires at approximately 450mm centers and postsin two places by wire ties to match fence with 1.57mm diameter galvanized or galvanizedcore P.V.C. wire coated.Bracing:Terminal posts shall be braced in line of fence with horizontal or diagonal stays of 32mmN.B. galvanized tube clipped to posts.Cable Tension Wire:Double twisted tension wire (or single Helicoil wire) for chainwire support shall be providedat top, center and bottom of fence and shall be 3.15mm diameter heavily galvanized or3.15mm galvanized core P.V.C. coated. (4.00mm dia. wire can be used if required.)Caps:Gate, end, corner and line posts shall be capped in a matching finish.Posts:Line posts shall be either 32mm N.B. (42.4mm OD) or 40mm N.B. (48.3mm OD) galvanizedtube, end and corner posts shall be 50mm N.B. (60.3mm OD) galvanized tube.Post Extensions:Extension arms for supporting 3 strands of barbed wire on line and terminal posts form partof the posts. If angled they shall be 45 degrees from vertical. The angle for corner postextensions shall be as necessary to match line and terminal posts.Gate Posts: Gate posts shall be provided to suite gate sizes as follows:
Post Sizes Gate Opening50mm N.B up to 2000mm single gates50mm N.B up to 4000mm double gates80mm N.B over 4000mm and up to 6000mm double gates
Footings:Intermediate posts shall be excavated to give a minimum depth of 600mm. End and corner
posts shall be 750mm deep. Gate posts shall be a minimum of 900mm deep or greaterdepending on size of gate. Length and Width:Lengths and widths shall be barbed or knuckled selvedge.Gates:The contractor is allow for three types of gates, the approximate sizes is as follows.
Single 1.3 – 2.4 meters Double 2.4 – 4.8 meters Other 4.8 – 6.0 meters
Gates are to be manufactured from Galva bond steel tube, zinc coated inside and outside. All hinged gate/s are to be constructed and installed, to enable the gate/s to be locked in
the fully open and closed position. Gates are to open and fold back 180 degrees whereground contours allow.
Receiving latches are to be fitted to enable gate/s to be secured with heavy duty padlocksin the open and closed position.
Vehicle Gates: Vehicle access gates must be recessed within the property boundary, wherenecessary, to enable vehicles to stop off road to allow opening and closing of the gate.Returns are to be splayed to maximise sighting of passing vehicles and pedestrians.
20. CCTV SURVEILLANCE SYSTEM
1.0 Dedicated robust and full proof CCTV camera system shall be provided for long termsurveillance and security of the entire solar power project.
2.0 The system shall be so that the entire solar panel area, electrical substation yard andcontrol room will be monitored continuously. Motion tracking system and alarmgeneration shall be provided to PTZ cameras.
3.0 Cameras shall be fixed on the telescopic self-supporting poles of 25 and 50 feet heights.Necessary electrical wiring shall be done for 24 volts 3 amp ac supply to the cameras.Those cameras will also require 12 volts 7.2 Ah smf battery backup. This back up isnecessary to get uninterrupted video recording when ac supply is not available.
4.0 No of cameras and system may vary as per site conditions and system requirement.5.0 It proposed to connect the surveillance IP camera output to two nos. of Network video
recorders and then on different LED’s for monitoring at two locations and also connect tothe client system. Fast Ethernet and Auto linkup with 30 day storage of surveillance isrecommended.
6.0 The surveillance system shall have the following major components viz, PTZ cameras,Bullet cameras i.e fix cameras with IP 66 support system and battery backup recordingfacility, minimum 30 days data, full HD resolution monitors, Ethernet system with autouplink, client system other details as given below.
6.1 Bullet cameras:Main Features
1. Full HD 1080P Real Time
2. External Vari-focal lens Adjustment
3. 3D+2D Digital Noise Reduction
4. Digital Wide Dynamic Range
5. Power over Ethernet Available
6. IR LED Built in 50M/ 70M Available
7. Mechanism IR Cut Filter Available
8. H.264/ M-JPEG/ MPEG4 Compression
9. Micro SD Card Backup(Optional) 10. 2-way Audio11. Video Output
12. IP66
13. Support iPhone/ iPad/ Android
14. SDK for Software Integration 15. Free Bundle 36 Ch Recording Software
CPU Multimedia SoC
Memory 256MB
Flash 16MB
Sensor 1/2.7” Megapixel CMOS Sensor
Sensitivity Color : 0.1 Lux (AGC ON)
B / W: 0.05 Lux (AGC ON)Lens type Vari-focus Lens [email protected]
Angle of View 24.64° ~ 82.08° (horizontal) 13.54° ~ 42.74° (vertical)
ICR YES
LED 56 Unit 5φ 850nM infrared LED (50M)
35 Units 5φ 850nM infrared LED + 4 Units High Power
850nM infrared LED (70M)IR Distance 50 M /70 M
I/O 1 DI/ 1 DO
Video Out YES
Power Consumption(50M) DC12V : 7.8W(IR On), 4.08W(IR Off) PoE: 10.08W(IR On), 4.32W(IR Off)
Power Consumption(70M) DC12V : 8.88W(IR On), 4.08W(IR Off) PoE: 11.04W(IR On), 4.32W(IR Off)
Water Resistance IP 66
Operation Temperature
0℃ to 45℃
Dimensions 114mm(ψ) x 260mm(D) (With Shield)
99.4mm(ψ) x 225mm(D) (Without Shield)Network
Ethernet 10/ 100 Base-T
Network Protocol IPv6, IPv4, HTTP, HTTPS, SNMP, QoS/DSCP, Accesslist, IEEE 802.1X, RTSP, TCP/ IP, UDP, SMTP, FTP,PPPoE, DHCP, DDNS, NTP, UPnP, 3GPP, SAMBA,Bonjour
Wireless (Optional)
Wireless 802.11b/g/n
Security WEP,WPA-PSK,WPA2-PSK
System
Video Resolution 1920x1080@30fps, 1280x720@30fps, 640x480@30fps, 320x240@30fps, 176x144@30fps
Video adjust Brightness, Contrast, Hue, Saturation, Sharpness, AGC, Sense-up, -D-WDR, Flip, Mirror, Noise reduction, Day&Night adjustable, White Balance
Triple Streaming Yes
Image snapshot Yes
Full screen monitoring Yes
Privacy Mask Yes
Compression format H.264/MJPEG/MPEG4(3GPP only)
Video bitrate adjust CBR, VBR
Motion Detection Yes, 3 different areas
Triggered action Mail, FTP, Save to SD card, DO, Samba
Pre/ Post alarm Yes, configurable
Security Password protection, IP address filtering, HTTPS encrypted data transmission, 802.1X port-based authentication for network protection
Firmware upgrade HTTP mode, can be upgraded remotely
Simultaneous connection Up to 10
Web Browsing Requirement
OS Windows 7, 2000, XP, 2003, Microsoft IE 6.0 or above, Chrome, Safari, Firefox
Mobile Support iOS 4.3 or above, Android 1.6 or above
Hardware Suggested Intel Dual Core 2.53G,RAM: 1024MB, Graphic card: 128MB
6.2 PTZ CamerasMain Features:1. 2 Megapixel Real Time Sony 20X Zoom Module
2. Digital Wide Dynamic Range
3. Sense Up Adjustable
4. True Day/Night Function – IR Cut Filter (ICR)
5. 360° Continuous Pan and 180° Tilt
6. Power over Ethernet(802.3at)
7. 2-Way Audio
8. H.264/ M-JPEG/ MPEG4 Compression
9. -20°C ~ 50°C Temperature Range for Weather Conditions
10. Micro SD Card Backup(Optional)
11. Support iPhone/Android/Mac
12. Triple Streaming
13. SDK for Software Integration
14. Free Bundle 36 ch Recording Software HardwareCPU Multimedia SoCRAM 256 MBFlash 16 MBImage Sensor 1/2.8" 2M Type Exmor CMOS SensorSensitivity 0.01 lux(B/W), 0.1 lux(Color)Lens Type 20X optical zoom lensFocal Length F=4.7mm (WIDE) to 94.0 mm (TELE)Maximum Aperture
F1.6 ~ F3.5
View Angle 2.9°~55.4°(H), 2.1°~42.6°(V)Pan / Tilt Range Pan: 360° / Tilt: 0°~180° Auto FlipManual ControlSpeed
Pan: 0.45°~90°/s / Tilt: 0.35°~45°/s
Preset(Patrol)Speed
200°/s
Preset Accuracy < 0.15°Preset Points 256Preset Focus Mode Auto / ManualPatrol 8 groups with 24 pointAuto Pan YesAuto Recovery Pending Time, ActionCruise Yes, 8 groupsHome Position YesPoint To Go YesAuto Electronic Shutter
Auto / Iris / Shutter / Manual Mode
AE – Iris priority F1.6 ~ CloseAE – Shutter 1/100 ~ 1/10000
priorityAE – Manual mode Iris: F1.6 ~ Close, Shutter: 1/100 ~ 1/10000, Gain:1~16BLC Off / OnDay & Night Mode Auto / Color / B/W / Time Mode with auto ICRDay & Night Level 1 ~ 5Sense Up Off / OnDNR Mode Off / OnWDR Mode Off / OnVideo Orientation Off / Flip / Mirror / RotateWhite Balance Auto / Indoor / Outdoor / ATW / ManualR-Gain 0 ~ 15B-Gain 0 ~ 15Sharpness -3 ~ 3Exposure Compensation
-7 ~ 7
OSD Off / OnFocus Distance 0.08M / 0.3M / 1M / 7M / 11MPrivacy Mask Yes, 6 different areasI/O 4 DI / 1 DOAudio G.711(64K) and G.726(32K,24K) Audio Compression
Input : External Audio in Output: External Line out Support 2-way audio
Power Source AC24 / PoE 802.3atPower Consumption
24V AC Power consumption Max: 15.51W PoE Powerconsumption Max: 15.48W
Dimensions 219mmOperating Temperature
-20℃ ~ +50℃ without heater
NetworkEthernet 10/ 100 Base-TNetwork Protocol IPv6, IPv4, HTTP, HTTPS, SNMP, QoS/DSCP, Access list,
IEEE 802.1X, RTSP, TCP/IP, UDP, SMTP, FTP, PPPoE,DHCP, DDNS, NTP, UPnP, 3GPP, SAMBA
SystemVideo Resolution 1920x1080@30fps, 1280x720@30fps, 640x480@30fps,
320x240@30fps, 176x144@30fpsVideo Adjust Auto Electronic Shutter、BLC、Day & Night Mode、Day
& Night Level Sense Up、DNR Mode、WDR
Mode、Video Orientation、White Balance、R-Gain、B-
Gain、Sharpness、Exposure
Compensation、OSD、Focus DistanceTriple Streaming YesImage Snapshot Yes
Full Screen Monitoring
Yes
Compression Format
H.264 / M-JPEG / MPEG4
Video Bitrate Adjust
CBR, VBR
Motion Detection ON / OFFTriggered Action Mail, FTP, Save to SD card, DO, SambaPre/ Post Alarm Yes, configurableSecurity Password protection, IP address filtering, HTTPS
encrypted data transmission, 802.1X port-based authentication for network protection, QoS/DSCP
Firmware Upgrade HTTP mode, can be upgraded remotelyMicro SD card Management (Optional)Recording Trigger Motion Detection, IP check, Network break down (wire
only), Schedule, DIVideo Format AVI,JPEGVideo Playback YesDelete Files YesClient System RequirementOS Windows 7, 2000, XP, 2003, Microsoft IE 6.0 or above,
Chrome, Safari, FirefoxMobile Support iOS 4.3 or above, Android 1.6 or aboveHardwareMinimum Intel Dual Core 2.53G,RAM: 1024MB, Graphic card:
128MB
6.3 HNR-25DF NVR SpecificationsMain Features：
1. Support 25-channel IP cameras input. 2. Support H.264 / MPEG4 decoding. 3. Real-time Display & Playback. 4. Support 5 Megapixel IP Camera for each channel. 5. Support HDD x4 or HDD x9 6. Support RAID 1/5 function on 9 HDD model. 7. Support e-SATA interface 8. Support HDMI Video interface. 9. Support CMS (Central Management System) control 10. Audio Backup for all channels 11. Graphic User Interface (GUI).12. Support time-point backup function under Ethernet remote control mode.User can select any time period to process backup from remote side. 13. Support time-search & event-search function under Ethernet remote controlmode. 14. Up to four online clients for independent remote control; individual live-time,play-back & time-search function available 15. Support PPPoE/ Static/ DHCP IP & DDNS. 16. Powerful mobile surveillance function, support i-Phone & Android
Specimen features suitable for this application available for this PTZ camera are as given
below:Video Mode
Mode MultiplexIP CAM IN 25 CHIP CAM RESOLUTION Up to 5 MegapixelIP CAM FRAME RATE Up to 30 FPS @ NTSC per CHSPLIT SCREEN 1, 4, 9, 16, 25VIDEO OUTPUT (VGA) x1 (1080P)VIDEO OUTPUT (HDMI) x1 (1080P)
AUDIO MODEAUDIO INPUT Phone Jack × 1AUDIO OUTPUT Phone Jack × 1AUDIO BACKUP YESAUDIO STREAMING YES
RECORDINGCOMPRESSION TYPE H.264IP CAM RECORDING RESOLUTION Up to 5 MegapixelIP CAM RECORDING RATE Up to 30 FPS @ NTSC per CHRECORDING MODE Manual / Schedule / AlarmPLAYBACK & SEARCHPLAYBACK SPEED Fast Forward X2 X4 X8 X16
X32Picture by picture PlaybackPauseFast Backward X2 X4 X8
TIME SEARCH YESEVENT SEARCH YESEVENT LIST 10000 records per H.D.D
(Maximum)STORAGE & BACKUP DEVICE
INTERNAL HDD SUPPORT SATA HDD x 9/ SATA HDD x4
EXTERNAL USB BACKUP DEVICE (PEN DRIVE, HDD, BURNER)
x2
E-SATA x1RAID 1 / 5
NETWORKETHERNET 1G x2ETHERNET COMPRESSION FORMAT H.264IE REMOTE CONTROL YESDDNS YESE-MAIL & FTP YESNETWORK IP Static/ DHCP/ PPPoE/DDNSMULTI-REMOTE CLIENT Yes ( 4 Clients at the same time
available)PDA/ SMART PHONE SUPPORT YES
ALARMALARM INPUT 8 Alarm InALARM OUTPUT 1 Relay Out
MOTION DETECTION YESMOTION DETECTION SENSITIVITY 1~10VIDEO LOSS DETECTION YESALARM RECORDING YESPRE-ALARM RECORDING YESBUZZER YES
SETUP & OTHER FUNCTIONSDST YESEACH CHANNEL BACKUP YESWATER MARK YESPRIVACY MASK YESPTZ CONTROL YESRS- 485 YESDIGITAL ZOOM YESPASSWORD CONTROL Two levels, one for system and
the other for HDD FormatKEY-LOCK YESMULTI-LANGUAGE YESFIRMWARE UPDATE USB Host & Update on line
OTHERSPOWER INPUT DC 12VDIMENSIONS (W x H x D) 430mm x 88mm x 422mmOPERATION TEMPERATURE 0- 45°C
Make: M/s Sony, Samsung, JVC Kenwood, BOSH, Panasonic, Pelco, LG, Goderj, Hunt. Other components are as follows:
Sr.No.
Product Description Make/Company
1 Power supply toPTZ Battery BackUp
24VAC 3AMP12V/7.2Ah SMf battery back up
2 Hard Disk 3TBHDD
30 Day storage survilance HDD M/s WD/Segate
3 Monitor 40” LED Full HD resolution LED LG/SAMSUNG/SONY
4 Switch 8 port Giga bitswitch 24 port Giga bitswitch
8 port 10/100/1000 Mbps fastEthernet switch with auto uplink24 port 10/100/1000 Mbps fastEthernet switch with auto uplink
DLINK/DGLINK
5 Junction box Outdoor junction box Syntex6 Network rack 27U 27U Rock with dual fan including
cable manager and power strip Netrack
7 Power cable 3 core power cable Finolex/Polycab8 Patch cord
Cat6 patch cord 5 meter patch cord Comscope/Systemax
9 OFC Cable Single mode fiber optic cable Finolex/RPG/Sterling
10 Client system Client system HP/Dell/Lenovo
11 Memory Card 32GB memory card Sandisk/Trancend/SONY
12 PVC Conduit pipe Finolex/Supreme/Zenith
13 Pole 25Ft and 50FT Telescopic and self-supporting14 Extension Board MX15 HDMI cable 10
meterMX/CROMA/SONY
16 UPS 6KVA, 12V/100AH UPS Emerson/APC/Microtec
21. POWER GENERATION GAURANTEE:PV power output is warranted by the PV module manufacturers for 90 % capacity in thefirst 10 years and 80 % in the remaining 15 years. This module power warranty has beenmade mandatory by MNRE. As a result, the average annual generation of the plant is90% of the year 1 generation. The offered Solar module should give 90% output of ratedcapacity for first 10 years, 80% output of rated capacity for 25 years.
22. OPERATION AND MAINTENANCE1.0 Recommendations for Operation and Maintenance
The production of power from Solar Power Plant is generally static with no movingparts. The PV array produces electricity by deploying SPV modules which are warrantedfor 25 years and the solar PV power plant components require no major maintenance.The DC power produced by the array is converted into AC power by the inverters whichneed some attention due to electronics involved. The transformers and switch gear needproper preventive maintenance. Cleaning of solar panels is to be taken separately as anactivity.The operation of the plant starts with the commissioning activity. A proper checklistprocedure must be drawn up, which would include all the sections of the plant and shalltake into account the contractual responsibilities, the technological relationship betweenthe various sections, pre-commissioning, cleaning requirements, etc. The checklistsprocedure shall cover the following: To ensure that the necessary checks are carried out on each item of the plant before it
is put into commercial service To ensure that energy is supplied to equipment or a plant when it is safe. To facilitate the recording of the progress on the various commissioning activities To provide a basis for the plant historyThe operation of the power plant unit interconnected to the grid is an activity that mustbe properly coordinated, within the plant as well as with the sub-station/feeding point.The plant operator should follow the guidelines given below:
Frequent checking and calibration of instruments;
Frequent cross checking for any abnormal operating condition.
The power plant has to operate in parallel with the grid system which is a vast powercarrier. The power plant has to protect its equipment against possible faults or otherdisturbances from the grid.
Directional and Reverse power protection will be provided to isolate the power plant
from the grid at the time of any fault.
2.0 The contractor shall undertake planned maintenance with close coordination withsubstation/feeding points. There are two components in maintenance cost: one is the directcost of maintenance, (i.e. the material and labor), and the other is the cost of energyproduction loss. There are two categories of maintenance work. One is the breakdownmaintenance and other is preventive maintenance.
3.0 Breakdown Maintenance: Breakdown maintenance is expensive, and hence it should beminimized as much as possible. The contractor shall follow following actions to ensurereduction in the breakdown maintenance and also help in planning for preventivemaintenance:
Maintenance schedule shall be duly followed with all the check lists and formats.
Maintain Adequate spares at site for quick replacement
Follow all the O&M instructions of the OEM manufacturer
Ensure availability of Trained/skilled manpower and toots/machinery to attend to thebreakdowns quickly
The contractor shall maintain proper records are maintained not only for themaintenance work but also of the material used, actual man hours spent, etc. Thespares good stock shall which are required frequently.
4.0 Planned Preventive Maintenance activity should be clearly planned with regard to theavailability of material and labour. It is also essential to develop proper O&Mprocedures.The following actions will ensure timely preventive maintenance:
Careful logging of operation data/historical information from the Data MonitoringSystems, and periodically processing it to determine abnormal or slowly deterioratingconditions.
Walk down checks of the plant.
Follow all the O&M instructions of the OEM manufacturer.
Careful control and supervision of operating conditions.
Regulate routine maintenance work such as keeping equipment clean, cleaning SPVmodules and delicate ingredients of transformers and circuit breakers. Cleanliness ofIsolators also to be ensured.
The O&M team will operate the solar facility in accordance with an Operations andMaintenance instructor deputed by Bhandup Complex. Several maintenance activitiesneed to be completed at regular intervals during the lifetime of the system. Below showsthe overview of maintenance schedule.
Maintenance Schedule for solar power plant:
Sr.No. Activity Continuous SemiAnnually
Annually Every10 years
Maintenance action
1 Check the amount of
Daily Yes Yes Yes Remote monitoring
units generated
system with critical alarms based on comparing sets of data
2 Review arrayoutput, current and voltage to verify properoperation
Daily Yes Yes Yes More substantial, on-site check in a random pattern to verify computer output
3 Watch for shading by Trees and other obstructions
Daily Yes Yes Yes Particularly for ground mounted systems, vegetation growthcan vary from year to year.
4 Inspect the PV array surface for excessive dirt or debris(bird droppings, leaves, etc.)
Daily Yes Yes Yes If rainfall is not expected to remove any accumulation, the surface will be cleaned with a gentle rinse with plain water or mild detergent.
5 Inspect the PV modules for cracks/damage
Every 3days
Yes Yes Yes Preventative maintenance check
6 Inspect the PV modules for discoloration/ cloudiness
Weekly Yes Yes Yes Preventative maintenance check
7 Inspect the entire systemfor loose or damaged wiring
Monthly Yes Yes Yes Preventative maintenance check, easy to repair on site
8 Inspect inverter and clean any filters or vents to ensure unrestricted air flow
Monthly Yes Yes Yes Preventative maintenance check, easy to repair on site
9 Repair inverter
As required As per site condition Budgeted to have major overhauls once every 10 years.
5.0 OPERATION & MAINTENANCE WORK:5.1 Once the solar power generation is started, the contractor shall undertake the work of
operation and maintenance of the plant, operation and maintenance of data loggers andenergy management system. The contractor shall also be responsible for operation andmaintenance of the CCTV security system provided for round the clock for monitoring of
the pv solar plant. Monitoring will be provided in the control room.5.2 Operation and maintenance of the power plant for three years from the date
commissioning is mandatory to the contractor. Cost of Operation and maintenance shall beincluded in the offer.
5.3 This project is on the turnkey basic and scheduled to be commissioned in phases. Onsuccessful completion of each phase the successful tenderer shall take up the responsibilityof the operation and the maintenance of the plant. The work of regular washing cleaningand maintenance of the solar panels, shall be undertaken by the contractor as per theschedule given.
5.4 The contractor shall appoint a dedicated team of qualified supervisor and labour stafftowards this work. Getting this work done will be the sole responsibility of the contractorso that power generation work will not be affected. The information about details of theemployees will furnished by the contractor from time to time.
5.5 The contractor shall be responsible for all the required activities for the successfulrunning, optimum energy generation & maintenance of the Solar Photovoltaic Power Plantcovering.
Sr.No. Description of work1 Deployment of Engineering and supporting personnel and regulation of their
duties.2 Deployment of Security personnel and regulation of their Duties.3 Successful running of Solar Power Plant for optimum energy generation.4 Monitoring controlling, troubleshooting maintaining of records, registers.5 Supply of all spares, consumables and fixing / application, invertors/PCU,s,
Transformers, PCC (415 volt) and VCB (3.6 KV) panels , VCBs ,CTs, PTs, Busbars, cables terminals kits, Isolators with earth switch, Las, Flood lights, StreetLights along with battery replacement and all other associated equipment of solarplant etc, for a period of five years. Cost of these items (including Cost of spares)shall be included in the price quoted for O&M. Pl note MCGM will pay onlyO&M charges.
6 Supply & use of consumables throughout the maintenance period as perrecommendations of the equipment manufacturers.
7 Conducting periodical checking, testing, over hauling and preventive action.8 Daily General up keeping including cleaning of all equipment, building,
amenities, roads, Solar Photovoltaic land area etc.7 Submission of periodical reports to MCGM on the energy generation & operating
conditions of the solar plant.8 Taking care of the full security aspects of the Solar Power Plant.9 Replacement of damaged modules if any, during period of five years.10 Replacement of Invertors/PCU’s and all type of Battery used in solar plant time to
time if required.11 Insurance covering all risks(Fire & allied perils, earthquake, terrorists & burglary.12 The contractor shall provide necessary facilities including medical facilities,
transportation, healthy working conditions etc as per factories act 1948.5.6 Continuous monitoring the performance of the Solar Power Plant and regular
maintenance of the whole system including Modules, PCU’s, junction boxes, undergroundcables, outdoor/indoor Distribution Board transformers , VCBs, CTs, PTs, Battery and allassociated equipment etc. necessary for extracting and maintaining the maximum energyoutput from the Solar Power plant.
5.7 Operation and Maintenance of the Solar Photovoltaic Power Plant is required for a periodof 3 (three) years from the date of commissioning of the project which shall be carried outat fixed cost. The period of Operation and Maintenance will be deemed to commence fromthe date of commissioning of solar Photovoltaic Power Plant.
6.0 OPERATION AND PERFORMANCE MONITORING6.1 Operation part consists of deputing necessary manpower necessary to operate the Solar
Photovoltaic Power Plant at the optimum capacity. Operation procedures such aspreparation to start, routine operations with safety precautions, monitoring of SolarPower Plant etc. shall be carried out as per the manufacturer’s instructions to havetrouble free operation of the complete system.
6.2 Daily work of the operators in the Solar Photovoltaic Power Plant involves cleaning ofModules, logging the voltage, current, power factor, power and energy output of the solarPower Plant. The operator shall also note down failures, interruption in supply andtripping of different relays, reason for such tripping, duration of such interruption etc.The operator shall record monthly energy output, down time, etc.
7.0 MAINTENANCE The contractor shall perform all necessary maintenance services including applicableservices listed below
Sr. No. Description of work1 The contractor shall carry out the periodical/plant maintenance as given in the
manufacturer’s service manual and perform at least minimum requirement.2 Regular periodic checks of the Modules, PCU’s shall be carried out as a part of
routine preventive maintenance.3 In order to meet the maintenance requirements stock of consumables are to be
maintained as well as various spare as recommended by the manufacturer at leastfor 5 years to be kept for usage.
4 Particular care shall be taken for outdoor equipment to prevent corrosion.Cleaning of the junction boxes, cable joints, insulators etc. shall also be carriedout at every month interval.
5 Resistance of the earthing system as well as individual earthing is to bemeasured and recorded every month. If the earth resistance is more than 3 ohm,suitable action is to be taken to bring down the same.
6 According to the recommendations stock of special tools and tackles shall bemaintained for Modules, PCU’s and other major electrical equipment.
7 A maintenance record is to be maintained by the contractor to record the regularmaintenance work carried out as well as any breakdown maintenance along withthe date of maintenance reasons for the breakdowns steps have taken to attendthe breakdown duration of the breakdown etc.
8 The Schedules will be drawn such that some of the jobs other than breakdown,which may require comparatively long stoppage of the Power Plant, shall becarried out preferably during the non-sun period.
9 The Contractor shall deploy enough manpower at Solar Photovoltaic PowerPlant site to carryout work instructions and preventive maintenance schedules asspecified. The contractor shall keep at least one skilled and experiencedEngineer, 3 ITI electrician, at least 5 persons to clean modules and otherequipment at site on permanent basis (if in shift then additional) to supervise andup keeping ,O & M jobs that are being carried out at plant. The contractor mayincrease the above staff to suit the requirement.
10 The Contractor will attend to any breakdown jobs immediately forrepair/replacement/adjustments and complete at the earliest working round theclock. During breakdowns (not attributable to normal wear and tear) at O&Mperiod, the Contractor shall immediately report the accidents, if any, to theEngineer In Charge at site of MCGM showing the circumstances under which ithappened and the extent of damage and or injury caused.
11 The Contractor shall comply with the provision of all relevant acts of Central orState Governments including payment of Wages Act 1936, Minimum Wages Act1948, Employer's Liability Act 1938, Workmen's Compensation Act 1923,Industrial Dispute Act 1947, Maturity Benefit Act 1961, Mines Act 1952,Employees State Insurance Act 1948, Contract Labour (Regulations &Abolishment) Act 1970, Electricity Act 2003, Grid Code, Metering Code,MNRE guide lines or any modification thereof or any other law relating wheretoand rules made there under from time to time.
12 The contractor shall at his own expense provide all amenities to his workmen asper applicable laws and rules.
13 The Contractor shall ensure that all safety measures are taken at the site to avoidaccidents to his or his Co-contractor MCGM Workmen.
14 If negligence / mall operation of the contractor's operator results in failure ofequipment such equipment should be repaired replaced by contractor at free ofcost.
15 If any jobs covered in O&M Scope are not carried out by the contractor duringthe O&M period pro-rata deduction will be made based on the quantum of workfrom the O&M contract bills.
16 The Contractor shall arrange for all the necessary tools and tackles for carryingout all the maintenance work covered under this contract.
7.0 SECURITY SERVICESThe contractor shall review the need of security situation and accordingly deployment ofsecurity staff will decided. The contractor has to arrange proper security systemincluding deployment of security personnel at his own cost for the check vigil for theSolar Power Plant. At least 2 security staff per shift should be available. The securitystaff may be organized to work on suitable shift system; proper checking & recording ofall incoming & outgoing materials, vehicles shall be maintained. Any occurrence ofunlawful activities shall be informed to MCGM immediately. A monthly report shall besent to MCGM on the security aspects. Any loss or damage on account of security lapsshall be compensated by the bidder.
8.0 OPERATION & MAINTENANCE SERVICES OF THE PLANTIt would be the responsibility of the contractor to operate and maintain the entire solarplant and all the associated equipments at his own cost for the quoted O&M period. Thecontractor shall perform all necessary services including applicable services listed below.
Sr. No. Description of work1 Provide all operations and maintenance services necessary and advisable to
efficiently operate and maintain the plant, including all associated andappurtenant mechanical and electrical equipments keeping in view theobjectives set-forth herein above.
2 Maintain at the plant accurate and up-to-date operating logs, records andMonthly reports regarding the operation and maintenance of the Plant whichshall include detail of power output, other operating data, repairs performed and
status of equipment, all such records to be maintained for the lifetime of theSolar farm. Upon expiry of term, the operator shall hand over such records tothe Owner. However, Owner shall have access to all such records at any time.
3 Regularly update and implement equipment repair or replacement andpreventive maintenance program that meet the specifications of the equipmentmanufacturers and the recommendations of the manufacturers.
4 Perform periodic preventive maintenance and overhauls required for the Plantin accordance with the recommendations of equipment manufacturers. Attendany break down in the Plant/Facility promptly. Inform time taken in attending tosuch breakdown.
5 Provide technical & engineering support for resolving operation andmaintenance problems.
6 Perform the services required to procure all spare parts, or equipment/s asrequired, overhaul of parts, tools and equipment, required to operate andmaintain the Plant in accordance with the recommendations of individualoriginal equipment manufacturer.
7 Operate and maintain the project for fire protection and safety of equipments.8 The Contractor shall Check growth of vegetation and defertilize areas with
vegetation that could eventually create shade on the arrays or increase the riskof fire.
23. INSURANCEThe contractor shall provide or obtain and maintain in force throughout the period ofO&M the following insurance coverage:
1. Insurance to cover third party liability of appropriate value along with an undertakingindemnifying MCGM from any such claim.
2. The third party insurance shall cover among other things, fire, earthquake, theft and flooddamage and deductibles thereon. Machinery breakdown insurance and deductibles / excessthereon for modules, inverters, other auxiliaries and complete Solar Photovoltaic PowerPlant. However, insurance of pv solar power panels is mandatory covering all possibleworst outcomes on the solar panels such as force major clauses etc.
3. Workmen compensation and /or group personal accidents Insurance policy covering all itsemployees including of the sub operator.
4. Pilferage, theft, burglary are also to be covered in the insurance policy by the operator.5. Fire and allied perils including earthquake, flood, storms, cyclone, tempest, and insurance
policy shall be taken by the contractor regularly immediately after commissioning. In caseof any loss/ claim under the policy, contractor shall immediately inform the same toMCGM and arrange to recover the dues from the insurance company with immediateeffect. Necessary co-operation and co-ordination shall be rendered from the concernMCGM section.
6. Any replacement / repair / modification of any item / equipment due to any reason shall becarried out by the contractor at his own cost for the quoted O&M period, so as to haveminimum solar plant down time. In case of insurance claim related work the contractorshall not delay the work for insurance claim to settled.
7. MCGM shall not be responsible for any break down / failure of any equipment to anyreason thereof.
8. The scope / type / form of insurance cover mentioned elsewhere in this tender, for thescope of the project for the quoted O&M period, would be superseded by this Clause.
a) Clause under EPC contract:The Contractor shall take comprehensive all risk Insurance Policy covering Marine/Transit,
Insurance/Transportation, unloading at Owner’s premises, storage, erection, testing &commissioning for the entire package for 110% of the Contract Price. The policy must alsocover all his workmen, personnel whether direct or through any sub-contractors, automobiles,equipment, tools and tackles. The insurance policy must also include third party liability.
b) Clause under O&M contract:i) The Contractor shall take sufficient insurance cover for the term of the O&M agreement tobe able to commit to quoted Performance Ratios and cover its obligations under the scope asper this O&M agreement to the satisfaction of the owner. Among other insurance covers, theContractor is compulsorily required to take the following covers unless such an insurancecover is not available in the market or is waived off by the owner on reasonable grounds:
a) Performance Guarantee Coverb) Workmen Compensation Policy
ii) The Contractor shall make the Owner and its Lenders, as informed by the Owner, as thebeneficiaries to all the insurance policies taken out for the Plant.
24. WARRANTY/ GUARANTEE The Contractor shall provide a warrantee for the items mentioned below against the periodmentioned from the date of Commissioning.
1. Power Plant Installation: Workmanship‐10 years, service‐25 years
2. Power plant power performance ratio ‐ min. 75%.3. Capacity utilisation factor after one year - min 15%.4. The Contractor must ensure that the goods supplied under the Contract are new, unusedand of most recent or current models and incorporate all recent improvements in design andmaterials unless provided otherwise in the Contract.
5. Solar PV Modules: Workmanship/product replacement‐10 years and 90% power output for 10 yearsand 80% power output for 25 years.6. Module mounting structures and string combiner boxes – 5 years product warranty.
7. Inverter, Transformers and all other switchgears, : Workmanship/product replacement ‐5 years and
service‐25 years.8. During the period of Warrantee / Guarantee the Contractor shall remain liable to replace anydefective parts, that becomes defective in the plant, of its own manufacture or that of its sub-Contractors, under the conditions provided for by the Contract under and arising solely from faultydesign, materials or workmanship, provided such defective parts are not repairable at Site. Afterreplacement the defective parts shall be returned to the Contractors works at the expense of theContractor unless otherwise arranged.9. During the Operation & Maintenance and guarantee period, the Contractor shall be responsible forany defects in the work due to faulty workmanship or due to use of sub-standard materials in thework. Any defects in the work during the guarantee period shall therefore, be rectified by theContractor without any extra cost to the Company within a reasonable time as may be consideredfrom the date of receipt of such intimation from the Company failing which the Company shall takeup rectification work at the risk and cost of the Contractor. 12 Months guarantee period will startafresh for the replaced or repaired unit.25. (a) Handing Over –Taking Over :The work shall be taken over by MCGM upon successful completion of all tasks to be performed atSite on equipment supplied, installed, erected and commissioned by the contractor in accordance withthe tender conditions. During handing over complete project work, the contractor shall submit thefollowing :1. All as- Built Drawings and documents as per the contract coordination procedure set out for thesuccessful completion of the project.
2. Detailed Engineering Document with detailed specification, schematic drawing, circuit drawing,cable routing plans and test results, manuals for all deliverable items, Operation, Maintenance &Safety Instruction Manual and other information about the project.3. Bill of material.4. Inventory of recommended and mandatory spares at project Site.5. Immediately after taking over of complete facilities, the same will be handed over to the Contractorfor Operation & Maintenance for a period of as mentioned in the tender.
Performance Guarantee:Details about the inclined solar radiation are mentioned separately. The PR of the solar plant shall beassessed based on the Expected Energy (EE) which is arrived in proportion to actual insolation andgrid up - time recorded at the site. The bidder determines the performance ratios taking into accountlosses from various components of the system. (Inverter, transformer, cables etc) and degradation ofthe solar modules year on year. These ratios are indicative of the expected system performance at anyinsolation level. The performance of the plant shall be evaluated through Performance ratio test as perIEC 61724 in following stages.a) The initial acceptance of the plant will be evaluated by measuring performance ratio (PR) forcontinuous 7 days.b) Final acceptance PR test of 30 days and CUF demonstrated at the end of one year from the date ofcommissioning.PR and LOSS OF REVENUE Calculations:The Efficiency or performance ratio (PR) of the PV Plant will be calculated according to IEC 61724or any method prescribed by Solar Energy Corporation Of India. The most suitable and widelyaccepted formula will be used for calculation of loss of revenue and performance ratio ( PR )calculationsFor example : Expected generation corresponding to the Guaranteed Performance Ratio(hereinafter referred to as “Expected Generation”) from the plant is calculated using thefollowing formula:Expected Generation = Guaranteed Performance Ratio * Solar Insolation (in kWh/m2 *
annum) * Module Efficiency * Number of modules * Module Area
This translates into the following formula for Expected generation corresponding to theGuaranteed Performance Ratio which will be used for computation of the Loss of Revenue ascalculated in (1) below:Expected Generation = Guaranteed Performance Ratio * Solar Insolation (measured global
inclined insolation) * Plant Capacity (in kW)1. LOSS OF REVENUE means the loss incurred on account of lower generation than theexpected generation which is based on the guaranteed performance ratios, cumulative solarradiation as per Design, connected switchyard and grid availability. Loss of Revenue = (Expected Generation in kilowatt-hours - Actual Generation inkilowatt-hours)*Applicable Tariff * % uptime of switchyard * % time of GridavailabilityWhere,The claim for Loss of Revenue should be based on the report from SCADA for the AnnualPeriod on Solar insolation, percentage (%) uptime of switchyard and percentage (%) time ofGrid availability. In case there is a downtime of both the switchyard and the grid at the sametime period, highest of the downtime shall be taken for computation of the above loss ofrevenue.The Owner shall compute the Loss of Revenue at the end of each Annual Period of Operationas per this clause and Table below (for Loss of Revenue Computation) and notify theContractor of the amount payable by an invoice duly raised on the Contractor. The Contractoris expected to compensate the owner for the loss of revenue within 15 business days from the
receipt intimation from MCGM failing which the owner shall be entitled to recover theamount payable from the Performance Bank Guarantee (PBG).Loss of Revenue Computation (specimen calculations)
No. ofyearfrom
date ofcommissioning
Guaranteedperformanceratio aspertableabove(A)
MeasuredGlobalInclinedInsolation inkWh/m2
/annum(B)
PlantCapacity (inkW)(C)
%uptimeofswitchyard (D)
%uptimeof Grid(E)
Expectedgeneration inkWh(F) = A*B*C*D*E
ActualGenetration inkWh(metered at theinput ofthetransformer)(G)
ApplicableTariff(H)
Loss ofRevenue = (F–G)*H
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
In the event that Actual Generation is greater than Expected Generation, the owner is notliable to receive or pay any compensation. MCGM reserves the right to modify the aboveformula or adopt new, more contemporary formula available if any for the calculation of Lossof Revenue Computation which shall be binding on the successful bidder.For calculation of loss of revenue, the rate of tariff for loss of revenue shall be the net rate(after adding net & just benefits provided by Discom) at which Bhandup Complex receivesthe power from Local Discom on that date (as per the Multiyear Tariff decided byMaharashtra Electricity Regulatory Commission for that particular distribution company).There shall be no cap on loss of revenue. Entire loss of revenue shall be recovered from thesuccessful bidder. Further additional 10% penalty will be charged on the total loss of revenuecost.
2. PERFORMANCE BANK GUARANTEE (PBG)The successful contractor shall submit performance bank guarantee within 30 days of issue ofLetter of acceptance. Loss of revenue due to less PR resulting ( loss of revenue ) due to lesselectricity generation shall be recovered from the successful bidder performance bankguarantee.The Contractor shall submit a Performance Bank Guarantee as per PBG clause mentioned inthe tenderer, to be valid for a period of three years from the date of commissioning of theplant. The Contractor agrees to replenish the PBG to its original value in the event that thePBG is drawn encashed by the Owner for any loss of Revenue as defined in 1 above.At least 30 days before the expiry of the PBG, the Contractor shall submit another BankGuarantee of the same amount or renew and extend the same and the BG shall be valid fromthe expiry of the PBG until the end of the product warranty period and tenure of the O&MAgreement whichever a longer period is. In case the validity of PBG is expiring before thevalidity period specified in this clause, the Contractor shall at least 30 days before the expiryof such PBG, replace it with another PBG or extend validity of the existing PBG.The Contractor shall replenish the PBG to its original value or revised value in the event that the PBG is drawn as per Clause above.
26. LIASONING WORKS The tenderer shall undertake following liasoning and co-ordination works for successfulimplementation of the plant.
1. Regulatory Permits and ApprovalsIt is expected that following regulatory permits and approvals are required to be obtainedduring project planning stage, project construction stage and project commissioning stage. Itwill be the responsibility of the successful tenderer to get all below mentioned permits (andall other necessary but not mentioned here) for the successful completion of the solar plant.This includes preparation of necessary drawings, documentation and follow up with concernagencies and getting the necessary approvals, No objection certificates, Permissions, etc. Thetenderer will also arrange visits of Electrical Inspectors and other Govt. officials etcwhichever is required. Necessary co-ordination shall be rendered from concern section ofMCGM, Bhandup Complex Water treatment plant. During the initial stage and before actualproject work begins i.e. planning stage, following miscellaneous regulatory permits andapprovals are required to be arranged by the project tenderer.
1. NOC from Electrical Inspector2. Road Entry Permit for Contractor to bring materials to site
During construction activity of the project, following regulatory permits and approvals arerequired to be arranged by the tenderer:
1. Chief Electrical Officer visit for approval on the electrical layout of plant.2. Transformers CT, PT testing and inspection.
2. Submission of structural and other drawings i) Foundations drawings for transformers.ii) Scheme of cable laying i.e. underground cable trench from electrical substation at newMBR up to underground cable trench at new pumping station. iii) Structural drawing of outdoor VCB panel i.e. Foundation for VCB panels. iv) Drawing of overall barbed wire fencing for the boundary wall of new MBR.
3. TEAM OF EXPERTSThe tenderer shall have dedicated team of experts having experience of engineering,procurement and commissioning (EPC) of grid interactive and captive consumption pv solarpower plants. The team should have minimum 4 to 6 no. of pv solar power generation plantsworking successfully to their credit. 27. ELECTRICAL WIRING DIAGRAMSDetails of various drawing and wiring diagrams are mentioned in the technical specifications.Other than those drawings following drawings are to be submitted for approval beforestarting of the actual work. The tenderer shall also have to submit and get approval to thedrawings, line diagrams, etc which are not mentioned here but felt necessary by MCGM atthe time of execution of the project.
Sr.No.
Item Qty(Nos)
Details required
1 Vacuum Circuit Breaker(VCB) panel
4 Wiring diagrams showing grade of wire , asper confirming IS, indicating meters,instruments etc.
2 Metering arrangement atpower evacuation point
3 Wiring diagrams showing grade of wire , asper confirming IS, indicating meters,instruments etc.
3 Net metering drawing at 110kV electrical substation
2 Wiring diagrams showing grade of wire , asper confirming IS, indicating meters,instruments etc.
4 Relay protection schemewherever applicable.
7 Line diagram and detail drawing showingthe type and rating of protective devices andassociated CT’s.
5 Drawings required to besubmitted to various govt.agencies for approvals, etc.
Asrequired
As per prevailing norms and requirements.
6 Line diagram 2 Showing relevant details of Substation alongwith outline and equipments as per relevantIS.
28. Testing/Inspection:Over and above the standard clause of Inspection mentioned in the tender following sclause shall also be applicable.
Sr.No.
Item to be offeredfor inspection
Type of inspection Scope of testing & remarks
1 Photovoltaic Solarpower panels
Inspection to be offered atManufactures works. One
Manufacturing of about 20%randomly of the solar panels being
time inspection before finaldispatch clearance byMCGM.
supplied to MCGM will bewitnessed by two MCGMEngineers at manufacturers works.Solar panel inspection shall covermaterial inspection, review ofmanufacturing process andwitnessing tests on solar panels asper the details mentioned in thetender
2 Inverters Inspection to be offered atManufactures works. Onetime inspection before finaldispatch clearance byMCGM.
Shall cover material inspection,review of manufacturing processand witnessing tests on minimumtwo inverters as per tech.specifications and tests mentionedin the tender at manufacturersworks .
3 Transformers Inspection to be offered atManufactures works. Minimum three Inspections.
Material inspection stage, Middlestage inspection to witness tanking,and final inspection to witnessroutine and special tests before finaldispatch clearance by MCGM.
4 VCB panels Inspection to be offered atManufactures works. Onetime inspection before finaldispatch clearance byMCGM.
Shall cover material inspection,review of manufacturing processand witnessing tests on one or twoVCB’s, Relays as per tech.specifications and tests mentionedin the tender.
5 String CombinerBox (SCB’s)
Inspection to be offered atManufactures works wheredifferent components ofSCB are assembled to salefinal product. One timeinspection before finaldispatch clearance byMCGM.
Shall cover material inspection,review of manufacturing processand witnessing tests of differentcomponents of string combiner boxfor 2 to 3 sample SCB’s as perdetails mentioned in the tender.
6 PV Panel supportstructure , cables,Energy meters, electronic hard ware, etc.
One time inspection.Discretionary power of theconcern section of MCGM to take the decision of inspection.
MCGM may or may not opt forinspection at manufacturer works. Inthat case necessary test certificates andtest reports of the manufacturer’s willbe referred for dispatch clearance.
1. After the award of work, the successful bidder shall furnish a complete list and details ofall tests to be conducted on all major equipments.
2. The bidder shall also furnish a schedule of inspection / testing so that MCGM mayassociate their representative to witness the tests. The Contractor shall also furnish copiesof all test/inspection reports for records and reference of MCGM.
3. MCGM shall depute its personnel for witnessing testing of major equipment atmanufacturer’s works. The bidder shall make all the required arrangements for such
testing at its work and extend full cooperation for inspection.4. The major items requiring inspection/testing are modules, Invertors, Transformers, AC
distribution board, DC distribution Board, Circuit Breakers and other items as decided byMCGM. All major/critical items shall be inspected and tested during manufacture and inassembled condition prior to dispatch in accordance with the standard practice/ QAP of themanufacturer. Copies of test certificates for such inspections in triplicate shall be suppliedbefore dispatch of the equipment’s. All other items like cables, conductors, relays andassociated equipment/components shall confirm to relevant international/nationalstandards.
6. MCGM shall decide about sample testing out of the lot or testing of the entire lot ofmaterial ,equipment’s, switchgear’s etc and also witness stage inspections if foundnecessary ( like material inspection stage, middle stage and final inspection beforedispatch) .
7. MCGM shall depute minimum three Municipal Engineers for plant inspection & prototypeinspection at overseas works if any. The imported components if any should also beinspected at the stock yard/warehouse of contractor for 100 % quantity.
8. The scope of work broadly includes review of manufacturing / fabrication procedures,QA/QC plans, review of Non Conformance Report (NCR) issued by the Contractor duringfabrication stage, review of documents including Quality Assurance Plan duringmanufacturing/ fabrication activities.
8. All the standard tests in accordance with the Standards adopted shall be carried out at themanufacturer’s works on all the major equipment and accessories so as to ensure efficientoperation and satisfactory performance of all the component/parts.
9. All equipment shall be further tested at site, wherever required, before commissioning. 10. The work is subject to inspection at all times and at all places by MCGM. The Contractor
shall carry out all instructions given during inspection and shall ensure that the work iscarried out according to the relevant codes of practice.
11. Decision of MCGM in regard to the quality of work and materials and performance to thespecifications and drawings shall be final.
12. If any item is not found conforming to standards during test/inspection, the same shall bereplaced / rectified by Contractor without any cost to MCGM and shall be reoffered forinspection.
29. General Instructions to the tenderer:
• The bidder shall visit the site and get acquainted with the exact quantum of workinvolved and site conditions etc. before submitting the tender. The bidder may visitthe site with prior intimation to A.E. (Sub- Station) Bhandup Complex on telephoneNo. 25658539/550. No subsequent claim, what-so-ever, will be entertained laterarising out of ignorance on the part of the bidder under any circumstances.
• The successful bidder shall have to construct a temporary site office, materialgodown, and all necessary arrangements shall also be made for safety and security ofthe material.
• The successful bidder shall have team of experts having experience in thephotovoltaic solar power plant generation (Engineering, Procurement andCommissioning) field and working in this field for minimum five years. The teamshall remain available as and when called by MCGM for discussion and shall alsoremain available during project execution phase.
• MCGM reserves the right to modify switchgears and equipment’s specifications to
higher version or most suitable version available in the market in the interest ofMCGM. It will be binding on the successful bidder to implement the same at no extracost and the bidder shall not have any say whatsoever in this regards,
• The decision of MCGM for such modifications MCGM decision If the manufacturerchosen by the bidder for a particular product does not qualify the quality test or if theinhouse test facilities at his works are not satisfactory MCGM reserves the to suggestother manufacturer or supplier mentioned in the tender at no extra cost.
• The successful bidder shall co-ordinate with the Solar cell and Substation section ofBhandup complex MCGM throughout the contract period for successful completionof the project.
• The tenderer shall note that the work of SITC of solar panel is on the top of differentwater tanks which are functional round the clock. Hence, utmost care shall have to betaken by the successful bidder during the clearing the surface, installation andcommissioning work.
• The successful bidder shall have to arrange skilled / unskilled labour, transportation,lifting crane, tools, tackles, machinery, etc. for the work as and when necessary.
• The successful bidder shall take care of all statutory requirements, rules andregulations etc. required during this work such as factory act, Indian electricity Act &rules, Labour act, workmen compensation Act etc.
• The successful bidder shall submit all necessary drawings for approval to MCGM asper details mentioned in the tender, action plan according to the details mentioned inthe tender and bar chart well in advance for the approval before starting the work.
• The successful bidder shall discuss with the M.C.G. M. officers before starting thework to get the clarification with regards the nature / way of work to be carried out.
• The successful bidder shall get necessary permit for his men and vehicle, if any, priorto commencement of work.
• The successful bidder shall take clearance of M.C.G.M. at every stage of work andthen proceed.
• The successful bidder shall take care of all safety measures for his workmen andmaterials as the work to be carried out within live switch yard.
• The successful bidder shall co-ordinate with Sub- Station before taking up daily jobduring commissioning and testing stage.
• The successful bidder shall clear the site in all respects after completion of the work.
• The successful bidder shall be held responsible for any damages of materials/equipment’s or to the Municipal property or if any accident occurs. M.C.G.M. will notbe responsible for such type of incident. The same shall be rectified by the bidder athis own cost.
• The successful tenderer shall take photographs before, during and after completion ofthe work and maintain the photographic records of all the items executed.
• The successful tenderer shall give undertaking from the manufacturer on Rs. 100/-stamp paper to supply the spares for the all major components of the power plant forthe next 10 years from the date of supply / commissioning or completion of the work.
• The successful tenderer shall give training on plant operations and maintenance toMunicipal Engineers.
• The Tenderer shall upload the copy of registration certificates under E.P.F. , M.P. Act1952 and under E.S.I.C. Act. 1948. If the tenderer is having less than 20 workers/Persons on their establishment then the tenderer should submit affidavit on Rs. 100/-stamp paper to that effect.
• The tenderer shall have to upload AFFIDAVIT FOR BEST PRICE on Rs.200 stamppaper along with tender documents.
• Deviations from specifications, if any, shall be clearly brought out by the bidderbefore / while submitting the offer. No subsequent claim, what-so-ever, will beentertained later under any circumstances.
Commercial: Cost Estimate
E-Tender for "S.I.T.C of 2.5MWp solar power generation plant on the roof top of new MBR
at Bhandup Complex" will be invited on the ‘Item Rate Basis’. Hence, estimate cannot be
disclosed before the due date of the E-Tender.
Disclaimer
The Corporation retains the liberty to change the specifications of works to be procured or the
items to be supplied and the terms of procurement of works or supply and/ or installations,
maintenance and other conditions prior to issue of the tender. The suggestion/ objections
received may or may not be considered if the same is not in consonance with the
requirements of the project, MCGM reserves it right to reject the same
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