PROVN OF ROOFTOP SOLAR PLANT FOR 60 KW AT NEW CANTT UNDER GE GANGTOK

Amount

Supplying, erecting, installing, testing and commissioning including topographical survey of Grid connected Rooftop Solar Photo-voltaic ( PV) plant of 10 KWp PV output without battery back up Bi facial PV panels, 3 phase Grid tie inverter, Net meter,Galvanised Iron mounting structure, cabling, lightening protection and earthing following sub-components and meeting the specifications as given here-in-after. Minimal technical requirements/standards for SPV systems/plants to be deployed as per MNRE are mandatorily to be complied within the design.Some of these are narrated here-in-after. For other details website of MNRE may be reffered. Bidder must visit the site before quoting the tender.

Photo Voltaic (PV) Modules:- The PV modules must conform to the latest edition of any of the following IEC/equivalent BIS Standards for PV module design qualification and type approval:Poly Crystalline Silicon Terrestrial PV Modules: IEC61215/IS14286/ Equivalent IS (if available as on last date of receipt of tender) In addition,the modules must conform to IEC 61701 Salt mist corrosion testing, IEC 62804- Certification for PID resistance ,IEC61730 Part1-requirements for construction &Part2-requirements for testing,for safety qualification or Equivalent IS(if available as on last date of receipt of tender) Each PV module must use a RF identification tag(RFID),which must contain the following information: (i) Name of the manufacturer of PV Module (ii) Name of the Manufacturer of Solar cells (iii) Month and year of the manufacture(separately for solar cells and module) (iv) Country of origin (separately for solar cells and module) (v) I-V curve for the module (vi) Peak Wattage, Im, Vm and FF for the module (vii) Unique Serial No and Model No of the module (viii)Date and year of obtaining IEC PV module qualification certificate (ix) Name of the test lab issuing IEC certificate (x) Other relevant information on traceability of module as per ISO 9000 series. Note: RFID shall be mandatorily placed inside the module laminate.

Authorized testing laboratories /centre: PV modules must qualify (enclose test reports/certificate from IEC/NABL accredited laboratory) as per relevant IEC standard.Qualification certificate from IEC/NABL accredited laboratory as per relevant standard for any of the higher wattage regular module should be acompanied with the STC report/certificate. For details of Test Labs refer Ministry of New And Renewable Energy website. The report submitted should not be older than 5 years. PV modules used in solar power plants/ systems must be designed for their output peak watt capacity, which should not be less than 90% at the end of 10 years and 80% at the end of 25 years. PV modules shall have product warranty of 10 years after completion of work. Contractor shall furnish approved security e.g FDR from approved bank for an amount equal to 2.5 percent of work done.

Silicon Poly Crystalline SPV cells shall be used in the Solar Photo voltaic module. each bi facial panel peak power shall not be less than 550 Watt SPV modules should be essentially indigenously manufactured(manufactured in India).The make of SPV shall be Vikram Solar/Indo Solar/Warree/Tata Solar/Adani The module efficiency shall be more than 22% at standard test condition and the cell should have minimum fill factor of 0.7 with anti reflective coating. It shall be made of high transmittivity glass & front surface shall give high encapsulation gain. Note: Anti dust coating on PV modules shall be done at site in the presence of Engineer-in-Charge.

All materials used shall have a proven history of reliability and stable operation in external applications.It shall perform satisfactorily in relative humidity upto100% with ambient temperatures between -4°C and +60°C and shall withstand gust upto 200km/h on the surface of the panel. Each and every SPV module shall be checked for conformity with relevant standard and no negative tolerance shall be accepted. SPV Module shall be manufactured in India irrespective of any other provisions in this tender. Module shall be made up of poly crystalline silicon cells. The interconnected cells shall be laminated in vacuum to withstand adverse environmental conditions. The module frame will be made of corrosion resistant materials having aluminium anodized finish.

The bidder shall carefully design & accommodate requisite numbers of the modules in the available area (refer topographical survey) to achieve the rated power in his bid. Note-: Shadow analysis report of the site has to be submitted along with topographical survey . The same shall be incorporated in designing in designing of solar plant in PV syst/PV sol/ NREL software. The modules must be compatible with Inverter MPPT range.

Balance of system (BOS) items/components: The BOS items/components of the SPV power plants/systems deployed under this project must conform to the latest edition of IEC or equivalent BIS Standards /MNRE specifications / as specified para 1.01 of minimal technical requirements/standards for SPV system/plants to be deployed during this financial year under the programmes of MNRE available on MNRE website as on last date of quoting of tender. Mounting structure:- (a) Module mounting structure shall require to be customize with respect to the site availability. (b) The contractor shall submit structural design on Stad- Pro based on Wind load of 120 kmph to be erected on road/pathway with galvanised roof top live load and dead load of structure with solar panel & seismic zone of Gangtok. Any deflection to the mounting structure shall be as per IS 800:2007 . Note- Structural design of the mounting structure should be approved by the GE.

Modules shall be mounted on a galvanised support structures. The base columns shall be made with reinforced cement concrete as per Stad Pro design report and site related data. The frames and leg assemblies of the array structures shall be made of MS hot dip galvanized.Minimum thickness of galvanization should be at least 600 gsm. Note:-Test certificate of galvanization shall be submitted by contractor. All fasteners shall be of Stainless steel-SS 304 Nut & bolts, supporting structures including module Mounting Structures shall have to be adequately protected against all climatic condition.

Water Leak Protection has to be ensured, Pure Epoxy Resin based Chemical anchoring system. Note:-Any damage done to water proofing/roof structure during installation shall be made good by the contractor at no extra cost.

Grid Tied Inverter: Supply, Installation, Testing & commissioning Grid connected solar inverter of suitable capacity with cumulative capacity of not less than 3 phase 10 KW AC having following specifications (i) Ambient temp : 4° C to 60° C (ii) Relative humidity : 0-100 % non condensing (iii) Environmental condition: outdoor, wet location (iv) Protection degree : IP-65 (v) Pollution degree : IV (vi) Safety class : class I metal enclosure (vii) MPP Tracker 2MPP trackers (viii) No. of inputs minimum 4 nos MC4 (ix) Frequency rated : 50 Hz (x) Total Harmonic distortion shall be less than 3% (xi) Power factor shall be more than 90% at any load (xii) Inverter Efficiency >93% (In case of 10 KW or above with inbuilt galvanic isolation) >97% (In case of 10 KW or above without inbuilt galvanic isolation) >90% (In case of less than10 KW) (xiii) External communication: RS-485 Port (xiv) Grid frequency Tolerance range +3 or more (xv) No load losses less than 1% (xvi) Protection against DG set run & grid isolation Note:- Inverter shall be capable of synchronisation with grid supply and DG Set supply.Make (DELTA,STRUDER, Schnider, ABB, POLYCAB, WAREE, HAVELLS or any make approved by MNRE)

Protection features:- Inverter should have following protections :- (i) Anti islanding. (ii) Over voltage protection. (iii) Over current protection (iv) Over temperature protection. (v) Reverse polarity Protection. (vi) Surge protection. (vii) Short Circuit. (viii) Frequency.

Cables & interconnection (i) DC cables 4 sqmm from Pannels to Inveter with 20mm conduit medium grade (ii) 3 phase 6 sqmm Copper cables with 20mm conduit from inverter to Sub Main DB (iii) AC and DC Distrubution Boxes (iv) 3 phase 10-60A Net meter of make HPL/Schneider/L&T Note(i) Rate quoted includes the cost of all T&P and items specified above to be executed on the buildings above Height 15Mts

Combiner boxes & electrical panel:- Combiner box & LT distribution electrical panel with suitable Incoming and outgoing breakers as per the design of inverter and array structure incl bus bar of size 1.8 times the rated current from the inverters.Incoming and outgoing MCCBs should be 1.25 times the rated current capacity. Note:-Platform for the panel with PCC (1:4:8) type D-2 with 40 mm graded crushed stone, 15 cm thick in foundation, brick work in CM (1:6) with sub class 'B', old size bricks, rendering 15 mm thick in CM (1:6) on exposed surfaces and 100 mm thick PCC padding (1:3:6), type C-1 (using 20 mm graded crushed stone aggregate) on top and grouting bolts etc for panel.

Cables and wires:- (i) For the DC cabling, XLPE insulated and sheathed, UV-stabilized single core flexible copper cables shall be used; Multi-core cables shall not be used. (ii) For the AC cabling, XLPE insulated and PVC sheathed single or, multi-core flexible Aluminium cables shall be used; Outdoor AC cables shall have a UV-stabilized outer sheath.from P.V inverter to LT panel as specifie By Engr-in-charge. (iii) The total voltage drop on the cable segments from the solar PV modules to the solar grid inverter shall not exceed 2.0%. (iv)The total voltage drop on the cable segments from the solar grid inverter to the building distribution board shall not exceed 1%. (v) All DC and AC cables from the SPV module and Inverter shall run through a Pre-Galvanized aluminium cable raceway of height not less than 40 mm and width not less than 50 mm. (vi) Cables and wires used for the interconnection of solar PV modules shall be provided with solar PV connectors (MC4) and couplers. (vii) All cable raceways shall be clamped to the rooftop, walls and ceilings with clamps at intervals not exceeding 50 cm; the minimum DC cable size shall be 4.0 sqmm copper; the minimum AC cable size shall be 4.0 sqmm Aluminium.

Lightening protection:- There shall be the required number of suitable Early Streamer Emission (ESE) lightning arrestors installed (As per Design to be submitted by sucessfull bidder). The air terminal is Early Streamer Emission(E.S.E.) type which shall be fixed at the top of a stainless steel pole with base be atleast 4 meters above the structure to be protected.Its height above roof level would be dependent on the level of protection and the protection radii required. The air terminal should be working on the principle of early streamer emission using non-radio active technology,needing no external power source. The air terminal should be capable of tracking the lightning stroke 60 micro seconds earlier as compare to passive lightning rod. The air terminal is of stainless steel and it has qualified diameter to resist high values of lightning currents .Roof connection pipe should be capable of withstand in lightning strikes having dimension 60mm OD and thickness of 5 mm.

Earthing Protection :- M&L for Bore earthig 150 mm dia buried by vertical boring machine, depth 6 mtr below ground level using earth electrode 50mm dia GI pipe medium grade duly drilled hole of 12mm dia, 115mm C/C on both side of the pipe including lowering in bore well upto the depth of 5.5mtr and one mtr above the ground level. The pipe electrode should be filled around commericial salt charcoal dust, copper suphate and magnesium phosphate of 30 cm layer each upto the full length of pipe. The borewell should have 12 mtr of length 150mm dia MS pipe for protection of borewell. Welding of GI Strip 32mmx6mm on earth electrode GI Pipe 32mm dia upto 10mtr below ground level and 15 mtr from the bore well to test point gun metal and PCC foundation surrounding the borewell 60cmx60cmx30cm all as directed by Engr-in-charge. GI strip upto 35mtr will be measured. Cost of gun metal test point deemed to be included in the quoted rate. Note:- The earthing shall be done independently / separately as per MNRE / IS for structure , inverter, lightening arrestor etc.

Metering arrangements: (a) Suitable dual metering arrangements with recording facility shall be provided.The metering arrangements must have feature to measure and record, (i)Parameters of KW,KWh,KVAR,voltage,current,PF and any other metering required to determine efficiency and efficacy of the system. (b)LT 3 Phase 4 Wire Electronic Tri vector Meter with CT ratio should be as per capacity of SPV plant. (i) Standard: IS 13779:1999 / CBIP 88 (ii) Accuracy: Class 0.5 (iii) Reference Voltage - 3x240 V (iv) Basic Current (Ib) - 5 A (v) Maximum continuous current (Imax) - 10 A (vi) Rated Frequency (variation) - 50Hz (±5%) (vii) Power consumption:- Voltage circuit: Less than 1.5 W and 10 VA per Phase at reference voltage, reference temperature and reference frequency Current circuit: Less than 1 VA per phase at basic current, reference frequency and reference temperature (viii) Display type: 8 digit 7 segment backlit LCD display, not less than10 mm character height (ix) Display in the event of Power Failure: Internal battery back-up for LCD display (x) Communication port: Galvanically isolated Optical Communication port for data transfer through either CMRI or remote device or both is provided with RS 485 for DLMS protocol (xi) Energy recording – Unidirectional

(c) CT/VT operated energy meter with following features (i) True four quadrant metering (ii) Import/ export metering and forwarded metering option for LT/HT systems (iii) Time and day metering with maximum demand registration and automatic billing (iv) LCD display with announciators for various critical events (v) Scroll lock feature for continuous display of a desired parameter on display (vi) High resolution energy display mode for dial test (vii) DLMS protocol for meter reading, with option to remote reading port. (viii) Advanced event detection features for voltage, current and magnetic influence (ix) Meter reading in absence of mains, using internal battery. Note :-Rate quoted includes the cost of all T&P and items specified above to be executed on the buildings above Height 15Mts

SHRI D P AGARWAL (BID ID -3337277)