SITC of 10KW Roof Top Solar PV power project with State of the art Technology at Tilottama Tourism Property with allied work on LT side (WBSEDCL) in the dist. Of Jalpaiguri.

Supply of Solar Photovoltaic Panels.Mono Crystalline 385Wp to 400Wp (Each) (Make: Vikram/Sova/Trina/Adani) The PV modules used must qualify to the latest edition of IEC PV module qualification test or equivalent BIS standards Crystalline Silicon Solar Cell Modules IEC 61215/IEC 61730.The rated output power of any supplied module shall have tolerance of +/- 3%.The peak-power point voltage and the peak-power point current of any supplied module and/or any module string (series connected modules) shall not vary by more than 2 (two) per cent from the respective arithmetic means for all modules and/or for all module strings, as the case may be.The module shall be provided with a junction box with either provision of external screw terminal connection or sealed type and with arrangement for provision of by-pass diode. The box shall have hinged, weather proof lid with captive screws and cable gland entry points or may be of sealed type and IP-65 rated.

Supply of Module Mounting Structure: Hot dip galvanized MS mounting structures may be used for mounting the modules/ panels/arrays. Each structure should have angle of inclination as per the site conditions to take maximum insolation.The mounting structure steel shall be as per latest IS 2062: 1992 and galvanization of the mounting structure shall be in compliance of latest IS 4Structural material shall be corrosion resistant and electrolytically compatible with the materials used in the module frame, its fasteners, nuts and bolts.Thiknes of Galvanization shall be more than 85µ and windstand should be more than 150KM/hr. Aluminium structures also can be used which can withstand the wind speed of respective wind zone. Necessary protection towards rusting need to be provided either by coating or anodization.The minimum clearance of the structure from the roof level should be 300 mm [Design to be approved by EIC before fabrication].

Supply of 1 Nos. PV Array Junction Box (AJB): a) The junction boxes are to be provided in the PV array for termination of connecting cables. The Boxes (JBs) shall be made of Powder Coated Aluminium /cast aluminium/M.S alloy with full dust, water & vermin proof arrangement. All wires/cables must be terminated through cable lugs. The JBs shall be such that input & output termination can be made through suitable cable glands.b) Each Junction Box shall have High quality Suitable capacity Metal Oxide Varistors (MOVs) / SPDs, suitable Reverse Blocking Diodes. The Junction Boxes shall have suitable arrangement monitoring and disconnection for each of the groups. Voltage: Max. 1000V DC [Make: Hensel/Spielberg/ABB/L & T/AVO].

Supply of ACDB : Designed for 10KWp solar power plant with all protections as per MNRE guidelines. DC DPBs shall have sheet from enclosure of dust & vermin proof conform to IP 65 protection. The bus bars are made of copper of suitable size. Suitable capacity fuse & MCBs/MCCB shall be provided for controlling the DC power output to the PCU along with necessary surge arrestors . AC Distribution Panel Board (DPB) shall control the AC power from PCU/ inverter, and should have necessary surge arrestors. Interconnection from ACDB to mains at LT Bus bar while in grid tied mode.All switches and the circuit breakers, connectors should conform to IEC 60947, part I, II and III/ IS60947 part I, II and III. All the Panel’s shall be metal clad, totally enclosed, rigid, floor mounted, air - insulated, cubical type suitable for operation on three phase / single phase, 415 or 230 volts, 50 Hz.All indoor panels will have protection of IP54 or better. All outdoor panels will have protection of IP65 or better. [Make: Hensel/Spielberg/Citel/ABB/L & T/schneider/Elmax]

Supply of Grid Connected Solar Inverter Rating: 10KW, 3Ph Inverter, Make: ABB/KACO/Delta/Fronius/THEA . Control : Microprocessor /DSP Capacity of Each Inverter: 10kW String Inverter .Nominal AC output voltage and frequency : 415V, 3 Phase, 50 Hz . Output frequency : 50 Hz . Max. DC input Power 10.3kW. MPPT Voltage Range250 - 850 VDC. Max. input current per MPPT 11A. Output Voltage Range - 320V - 480V AC. Grid Frequency Synchronization range : +/- 5 Hz. Ambient temperature considered : -20o C to 50o C. Humidity : 95 % Non-condensing. Protection of Enclosure :: IP-65(Minimum) for outdoor. Grid Frequency Tolerance range : +/- 5 Hz. Grid Voltage tolerance : 280 V to 480 V. No-load losses : Less than 1% of rated power. Inverter efficiency(minimum) : >93%. Inverter efficiency (minimum ) : > 90%. THD : < 3%. Efficiency Measurement IEC 61683/ Equivalent BIS Std.Environmental testing IEC 60068-2 (1,2,14,30) / Equivalent BIS Std.Interfacing with utility grid IEC 61727. Islanding Prevention Measurement IEC 62116. EMI/EMC : IEC 61000-6-3>16 Amps IEC 61000-6-4<16 Amps. Safety: IEC - 62109-1 (2010/4) C - 62109-2 (2011/6). All above IEC’s should be from NABL/ IEC Accredited Testing Laboratories or MNRE Approved Test Centers/ International laboratories.

Supply of Earthings System : Each array structure of the PV yard should be grounded/ earthed properly as per IS:3043-1987. The array field, PCU, ACDB and AJB should also be earthed properly. Earth resistance shall not be more than 5 ohms. It shall be ensured that all the earthing points are bonded together to make them at the same potential. At least 4 nos ground pipe / plate electrod as per PWD schedule for system earthing with soil treatment & earth inspection pit and GI flat of suitable size & quantity should be considered [Make: SGI/OBO/Beterman/Gmax].

Supply of Remote Monitoring System (GPRS Type): The RMS system is integrated or External unit. The following parameters are accessible via the operating interface display in real time separately for solar power plant: AC Voltage., AC Output current, Output Power, DC Input Voltage, DC Input Current, Power produce, Protective function limits (Viz-AC Over voltage, AC Under voltage, Over frequency, Under frequency ground fault. vi. The data shall be recorded in a common work sheet chronologically date wise. The data file shall be MS Excel compatible. The data shall be represented in both tabular and graphical form. viii. Simultaneous monitoring of DC and AC electrical voltage, current, power, energy and other data of the plant for correlation with solar and environment data shall be provided

Supply of DC Cables ( 4 Sqmm Single Core Copper Tinned Solar DC Cable): Sizes of cables between array interconnections, array to junction boxes, junction boxes to Inverter etc. shall be so selected to keep the voltage drop of the entire solar system to the minimum. The cables (as per IS) should be insulated with a special grade PVC compound formulated for outdoor use. The size of each type of DC cable selected shall be based on minimum voltage drop however; the maximum drop shall be limited to 1%. [Make of DC PolyCab/Sterlite/Finolex/Havells/Anchor].

Supply of AC Cables(10 Sqmm 4 Core Copper Flexiable cable ): The size of each type of AC cable selected shall be based on minimum voltage drop however; the maximum drop shall be limited to 2%. i. Shall meet IEC 60227/IS 694, IEC 60502/IS1554 standards. Cost is inclusive of fixing accessories as required. [Make of AC cable: PolyCab/Sterlite/Finolex/Havells/Anchorr].