PROVISION OF SELF POWERED SOLAR ENERGY BY USAGE OF SOLAR PANELS AT COAST GUARD STORE DEPOT CHENNAI UNDER GE (I) (CG) CHENNAI

Design, Supply, Installation, Testing and Commissioning of on-grid Solar Photovoltaic Power Plant conforming to various applicable standards BIS, IEC, MNRE guidelines, the Central Electricity Authority Regulations and as specified in particular specifications, consisting of Mono/Poly Crystalline silicon solar cells module, net metering facility, necessary control, protections, earthing, cabling, mounting structure, junction boxes, power conditioning units, Real time online web interfaced Data Monitoring System, Distribution panels, grid connecting arrangement, conduits, pipes, cable trays and other accessories etc. as required. Monocrystalline PV Modules & PV Cells : TATA/ Adani/ HHV/ Emmvee/ BHEL/ Premier Energies Solar Invertor/ Power Conditioning Unit (PCU) : Schnider/ ABB/ Siemens

(A) Mono Crystaline Silicon Solar Photovolaic Modules of 620 Wp or more (module power and number of modules to be selected according to available area & adequate walkway), having cell efficiency more than18% under standard conditions, form fill factor more than 0.76, plant performance ratio > 75%, made of high transmitivity glass front surface and it shall give high encapsulation gain (transmittance above 90% and bending less than 0.3%). The modules shall have the folling features :- [i] High Energy Efficiency Solar Photovoltaic Module of capacity 620 Wp or above, anufactured in India, conforming to IS 14286/IEC 61215, IS/IEC 61730- Part-1, IS/IEC 1730- Part-2. Solar Photovoltaic Module conversion efficiency shall not be less than 23% at STC with temperature coefficient of Pmax better than -0.30% per 0C. [ii] PV modules used in solar power plants/ systems must be warranted 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. [iii] Solar Modules shall be designed to operate in relative humidity upto 100% with temperature between -10 0C and +85 0C. Further, each PV module used in any solar power project must have Radio frequency identification tag (RFID tag) with information such as name of manufacturer, month and year of manufacturing, country of origin (separately for Solar cell and module), I-V curve, Unique Serial No and Model No of the module, Wattage, Im, Vm and FF, name of test lab issuing IEC certificate.

[iv] The temperature coefficient of power for the module shall not be more than 0.50% per degree Celcius. Every module must have bypass diode of suitable capacity. [v] It shall also be in confirmity to latest minimum technical specification issued by MNRE & IREDA from time to time. Modules should be of MNRE & IREDA approved companies and as per latest IEC/IS standards. [vi] Provision of earthing and earth strip / cable etc for earth of solar PV module/ array etc as per latest IS/MNRE & IREDA norms to be provided and cost of the same is deemed to be included in the item and no extra amount will be paid to the contractor on this account. (The earthing shall be of copper earth plate and having specification as per SSR Item Sr 19474). [vii] RFID reader is to be provided by contractor [viii] Both PV cells and SPV modules shall be of made in India. [ix] The minimum Net Annual Generation shall be 1,400 units per Kilo Watts.

(B) Junction Boxes : Supply and fix jucntion boxes of suitable Nos (as per design)/ OEM recommendations inputs and suitably rated output having separate DC fuses for both (+) & (-) on input and isolator on output terminal for each string. Each junction box must have a spare input terminal. The junction boxes shall be dust and vermin proof and water proof made of FRP/ Thermo Plast with IP 65 protection in compliance with IEC 62208 and shall be UV resistant, fire retardant. It shall have surge protection and maintenance free earthing as per relecant standard. The junction box shall have suitable arrangement of the following :- [i] The strings are required to be connected to the copper bus bar through individual fuses. [ii] Provide arrangement for disconnection (DC dis-connection switch) for each SJB/ SCB. [iii] Provide a test point for each sub group for quick fault location and to provide group array isolation. [iv] Each array box shall be of relevant IEC standard. [v] Each array junction box shall have suitable bypass & reverse blocking diodes for maximum DC blocking voltage of 1000V with suitable arrangement of its connection. Reverse blocking and bypass diodes shall work for extreme temperatures and shall have efficiency of 99.98% confirmed by appropriate IEC standard. Make : As per OEM

(C) DC Cables : Suitable size of XLPE insulated tinned Copper cable (min 6 sqmm of size) of Solar grade, 1100 Volts and UV resistant for outdoor installations confirming to IEC : 60227/15694 & 60502/ IS : 1554 (Pt I&II) and shall be as under :- [i] All cables and connectors for use of installation shall be of Solar grade which can withstand harsh enviromnetal conditions including high temperature, UV radiations, rain, dirt, burial and attack by moss and microbes for 25 years and voltage as per latest IEC/ IS. [ii] All the cables / wires shall be provided with UV resistant printed ferrules for DC side. [iii] The size of the cable shall be such that avearage voltage drop at full power from PV module to inverter shall be less than 1.5%. [iv] Cable batch No, drum No, IS code and size and make shall be metioned on every one meter or as per OEM practice. [v] The wiring of the module interconnection shall be in UPVC/HDPE pipe of suitable size. [vi] The cost of interconnecting DC Copper cable, MS cable trays, and earth work for trenches/ MS cable trays suitable to accommodate Solar grade cables from SPV module upto inverters are included in the item. Make : Lapp/ Siechem/ Leoni

(D) Module Mounting Structure (MMS) : Design, procure, fixing, support structure made of hot dipped Galvanized MS structure (mass of zinc coating shall be as per IS4759 ) having minimum head room clearance of 2.4 meter above the terrace level / ground level including necessary PCC foundation and associated work (cutting, grouting, PCC filling, dispoing waste material, etc., complete) and fixing mounting arrangement suitable for SPV modules so as it can withstand wind speed of 200 km per hour. The mounting structure is to be installed at RCC Roofs and the array structure has to be so designed that maximum load is directly on roof beams and columns. It shall also occupy minimum space without sacrificing the output of SPV panels & adequate space between the arrays shall be available for easy cleaning and maintenance. Nuts, bolts, mounting structure including module mounting structure shall have to be adequately protected from the atmosphere and weather prevailing in the area. All the fastners shall be of Stainless Steel of grade SS316. Notes : [i] Two numbers of anti theft fastners of Stainless Steel on two diagonally opposite corners of each module shall be provided. [ii] The modue mounting structure shall be of manual seasonal tilt of 0 to 40 degree to provide maximum generation. [iii] All the structure shall be design as per applicable BIS code and the material shall also confirm the applicable BIS Code.

[iv] Structural material shall be corrosion resistant and electrolytically compatible with the materials used in the module frame, its fasteners, nuts and bolts. The suitable arrangements for maintenance and cleaning shall be provided. [v] MMS design shall be supported with STAAD.Pro Report vetted by Third Party (IIT or NIT or any Government university Engineering colleges) and submitted for the approval of the Acepting Officer. [vi] The height of MMS shall be as per latest MNRE & IREDA guidelines. (E) Lightning Protection for PV Array : Design, procure and fix lighting arrestor system cofirming to IS/ IEC-62305 (Part 1 - 4) on the roofs. The air terminal shall be fixed at the top of GI elevation pole with base so as to be at least two meter above the structure to be protected. Its height above roof level shall be depend upon the level of protection and protection radii required. Notes : (i) The cost of all equipments, Copper strip upto earth test point, etc., shall be deemed to be included in this item. (ii) The cost of sufficient earthing for lightning protection is also included in this item and no extra payement will be made to the contractor on this account.

(F) Power Conditioning Unit (PCU) : Power Conditioning Unit shall be of 350-800 V DC Input voltage range and 415 V AC, three phase, 4 wire, 50Hz +/- 2.5 Hz, output voltage suitable to generate AC with a variation of 10% at nominal voltage. Power with efficiency not less than 97%, total harmonic distortion less than 3% and suitable for ambient temperature from 0 to 50 0C, Minimum IP-65 for outdoor and Minimum IP 21 for indoor, Built-in meter and data logger, MPPT, switching devices IGBT/MOSFETs and controller Microprocessor /DSP. PCU/inverter shall be capable of complete automatic operation including wake-up, synchronization & shutdown. [i] The PCU shall be able to withstand unbalanced load conforming to IEC standard with shutdown/standby mode. It must be provided with grid islanding along with manual disconnect pole isolation switch besides automatic disconnection. [ii] Minimum protections: Mains Under / Over Voltage, Over current, Over/Under grid frequency, Over temperature, Surge voltage induced at output due to external source, Short-circuit, Lightening, Anti Islanding (for grid synch. Mode) and other protections as per applicable standards. [iii] LCD/LED display of minimum parameters: DC input voltage, DC current, AC Voltage and current (all 3 phases, in case of 3 phase), Instantaneous & cumulative AC output power, Daily DC energy produced and other parameters applicable standard. Communication interface RS 485 / RS 232.

[iv] The inverter shall have minimum IP-67 protection, ground fault monitoring, grid monitoring, protection for anti-islanding, DC reverse polarity, AC and DC short circuit current and over current, AC and DC over voltage and over temperature. [v] The inverter shall adjust voltage and frequency levels to suit the grid. [vi] The inverter shall be self commulated with Pulse Width Modulation (PWM) technology and shall be capable of synchronise maximum with in one min. [vii] Maximum Power Point Tracker (MPPT) confirming to IEC 62093 shall be integrated in the inverter to maximise the energy drawn from the PV array [viii] Monolithic design of inverter is not permitted. [ix] The inverter shall have suitble nos of protected inputs (asper design) and outgoing shall be protected by ACB/MCCB. [x] The inverter should have MODBUS, PROFIBUS, ETHERNET common ports.

[xi] The inverter shall include appropriate self protection and self diagnostic feature to protect itself and the PV array from the damage in the event of inverter componant failure or from parameters beyond the inverters safe operating due to internal and/ or external causes. Inverter shall have protection arrangement against ground leakage faults, over voltage, (SPD) & over current. Inverter shall have arrangement for adjustment for adjusting DC input current and shall trip against sustainable fault down stream and shall not restart till fault is rectified. [xii] The inverter should have provisions of Galvanic isolation, anti-islanding protection (IEEE 1547/UL 1741) equivant IS and lightening. (aa) PCU must have the feature to work in tandem with other similar PCUs and be able to be successively switched ON and OFF automatically based on solar radiation variations during the day. [xiii] PCU must have the feature to work in tandem with other similar PCUs and be able to be successively switched ON and OFF automatically based on solar radiation variations during the day. [G] Real time online web interfaced Data Monitoring System: The solar power plant should consisits of Real time online web interfaced Data Monitoring System complete with accessories for various parameters such as Solar Irradiance, temperature, AC Output Voltage and current, Output Power, Power factor, DC Input Voltage and Current, Time Active, Time disabled, Time Idle, Power produced and other parameters as per standard practices.