Supply and installation of 4KV Hybrid Solar System On Grid at Dakshin Dinajpur District Press Club near DM Office

Supply and Fixing of 4 kv On-Grid Solar Inverter Scope of Work: Supply, Installation, Testing, and Commissioning of 4 kv Grid-Tie (On-Grid) Solar Inverter with the following minimum technical specifications: 1. Type: Transformer-less Grid-Tie Inverter (GTI) 2. Capacity: 4 kv 3. Input DC Voltage Range: 100 V to 500 V 4. Max. DC Input Capacity: 7500 Wp 5. Efficiency: Minimum 97% conversion efficiency 6. Cooling: Natural convection or smart cooling (as per OEM) 7. Protection: 8. IP66-rated enclosure for outdoor installation, resistant to dust, rain, and extreme weather 9. Anti-Islanding Protection as per IEC 62116 & IEC 61727 standards 10. Safety & Standards Compliance: 11. Compliant with MNRE, IEC 61683, IEC 60068, IEC 61000, IEC 61727, IEC 62116, or equivalent 12. Remote Monitoring: 13. Built-in Wi-Fi for wireless remote monitoring via mobile application or cloud portal 14. Display: LCD or LED display panel for real-time system status and diagnostics 15. Dimensions: Approx. 31.0 × 16.0 × 54.3 cm 16. Mounting: Suitable wall-mount or structure-mount configuration Make / Brand: Luminous / UTL / Exide

Supply and Fixing of DCR Bifacial Solar Panel – 550W, 24V Scope of Work: Supply, Installation, Testing, and Commissioning of DCR (Domestic Content Requirement) Bifacial Solar PV Modules of capacity 550W, 24V, compliant with MNRE norms, and suitable for grid-tied rooftop or ground-mount solar power systems. Technical Specifications: 1. Rated Power Output: 550 W 2. Operating Voltage (Vmp): 41.96 V 3. Operating Current (Imp): 12.99 A 4. Open Circuit Voltage (Voc): 49.44 V 5. Short Circuit Current (Isc): 13.83 A 6. Type: Bifacial, DCR-compliant 7. Nominal Voltage: 24 V system compatibility 8. Panel Dimensions: 2278 × 1134 × 35 mm 9. Weight: 28.3 kg • DCR Compliance: Manufactured with domestically sourced solar cells and modules per MNRE norms 10. Warranty: Minimum 144 months (12 years) on performance Make / Brand: Luminous / UTL / Exide

Supply and Fixing of Solar Mounting Structure on Rooftop Scope of Work: 1. Supply, Installation, Testing, and Commissioning (SITC) of solar photovoltaic (PV) module mounting structures on rooftop as per the following specifications: 2. Standard Compliance: Designed and fabricated in accordance with IS 7087 (Part 2):1986 or latest revisions — "Design, fabrication and erection of structural steel in buildings - Code of practice: Part 2 – Fabrication and Erection". 3. Installation: Mounting structure to be securely fixed to the rooftop (RCC/tin/any other surface as applicable) using appropriate fasteners and waterproofing methods to prevent roof leakage.

Supply and Fixing of Solar Array Junction Box (AJB) Scope of Work: Supply, Installation, Testing, and Commissioning (SITC) of Array Junction Box (AJB) for interconnecting multiple solar PV strings and feeding the combined DC output to the inverter. The AJB shall be suitable for outdoor rooftop/ground-mounted solar installations and must be weatherproof, dustproof, and vermin-proof. Technical Specifications: 1. Enclosure Type: IP65 or higher-rated, weatherproof, UV-resistant polycarbonate / FRP / powder-coated MS enclosure 2. Ingress Protection: Minimum IP65 as per IEC 60529 3. Rated Voltage: Suitable for system DC voltage up to 1000 V DC 4. Rated Current: As per string current calculation, typically ≥30A per string input 5. No. of Inputs: Configurable, typically 2-in/2-out based on site string design 6. Input & Output Terminals: Heavy-duty, high-quality copper bus bars or terminals 7. Protection Components: 8. DC Fuses (per string) – with fuse holders 9. DC Surge Protection Device (SPD) – Type II as per IEC 61643 10. DC MCB/Isolator – for output circuit 11. Optional: Reverse polarity protection diode and monitoring sensors (if SCADA/monitoring required) 12. Earthing Terminals: Separate earth terminals for body and array earthing 13. Cable Entry: With proper gland and ferrule marking, UV-resistant cable glands Make / Brand: Havells

Supply and Fixing of AC Distribution Box (ACDB) Scope of Work: Supply, Installation, Testing, and Commissioning (SITC) of AC Distribution Box (ACDB) suitable for solar rooftop/ground-mounted power plants, for managing and protecting AC output from the solar inverter before feeding into the LT panel or grid connection. Technical Specifications: Enclosure: 1. Type: Dustproof, waterproof, vermin-proof, powder-coated MS/FRP enclosure 2. Protection Class: IP65 (Outdoor) / IP52 (Indoor) 3. Lockable, wall-mounted type with earthing terminals 4. Incoming Protection: 5. MCB/MCCB of suitable rating with proper kA breaking capacity (≥10 kA) 6. Surge Protection Device (SPD) – Class II as per IEC 61643 7. Outgoing Protection: 8. MCB/Isolator for individual AC loads/grid connection 9. Provision for energy meter (optional) 10. Cable entry through IP-rated glands 11. Termination lugs, sleeves, and ferrule marking included 12. Voltage Rating: 230 V / 415 V AC, 50 Hz 13. Current Rating: As per inverter output (commonly 32 A to 63 A) 14. Cable Support: Proper cable trays or conduit with saddles to be provided for neat wiring 15. Test Reports: Pre-dispatch QA/QC and test certificate must be provided Make / Brand: Havells

Supply and Fixing of PVC Conduit with 6 sq.mm Copper Wire Scope of Work: Supply, laying, and fixing of PVC conduit of suitable diameter (minimum 25 mm) along with ISI-marked 6 sq.mm copper wire (multi-stranded, single-core, FR/FRLS), including all accessories, clamps, saddles, junction boxes, bends, tees, and necessary hardware for complete installation. Technical Specifications Conduit: • Type: ISI-marked rigid PVC conduit, heavy-duty • Color: White/Grey/Black (UV stabilized if outdoor) • Conduit fittings: Junction boxes, elbows, couplers, reducers – of same material and make • Wire Size: 6 sq.mm, single-core • Conductor: 99.97% pure electrolytic multi-strand copper • Insulation: FR/FRLS PVC insulation • Voltage Grade: 1100 V Make: Havells

Supply and Fixing of 4 sq.mm DC Copper Cable Scope of Work: Supply, Installation, Testing, and Commissioning (SITC) of 4 sq.mm DC cable for interconnection between solar PV modules, array junction boxes (AJB), and inverter input, including laying in conduits, tagging, termination, and testing. Technical Specifications Conductor: • Type: Multi-stranded, annealed tinned copper conductor • Size: 4 sq.mm • Purity: 99.97% electrolytic grade • Insulation: Material: Electron beam cross-linked XLPO/XLPE insulation UV, ozone, and moisture resistant Sheathing: • Outer sheath: UV stabilized and halogen-free • Jacket color: Red (positive) and Black (negative) • Voltage Rating: 1.8 kV DC (as per IEC 62930 / TUV 2 Pfg 1169/08.07) • Temperature Range: –40°C to +90°C operating • Flame Retardant: IEC 60332-1 compliant • Cable Type: Single core, flexible • Standards Compliance: • EN 50618 / IEC 62930 / TUV / IS 694 Make / Brand: Havells / Pollycab

Supply of Earthing System Scope of Work: Supply of complete earthing system components suitable for electrical safety and lightning protection of solar power installations, inverters, ACDB/DCDB, and other equipment. The system shall conform to IS/IEC standards for effective grounding. Technical Specifications: Earthing Electrode: 1. Type: Maintenance-free chemical earthing electrode 2. Material: GI or copper-bonded steel rod 3. Length: 3 meters (minimum) 4. Diameter: ≥ 50 mm for pipe type / ≥ 17.2 mm for rod type 5. Coating: ≥ 250 microns copper bonding (for copper-bonded rod) Backfill Compound: 1. Type: Conductive earth enhancement compound (carbon-based/GEL-based) Non-corrosive, moisture-retaining, improves conductivity Quantity: As per manufacturer recommendation (typically 20–25 kg per pit) Earthing Pit Chamber: 2. Precast RCC chamber with heavy-duty cover (minimum 300 mm x 300 mm) Chamber to have proper access for maintenance and testing Accessories: 3. GI/Copper strip or wire for interconnection (as per design) Earth busbar, clamps, lugs, bolts, and necessary hardware

Supply of Lightning Arrester System Scope of Work: Supply of complete Lightning Protection System (air terminal/arrester) for protection of solar structures, inverters, electrical panels, and buildings against direct lightning strikes. System to be compliant with relevant Indian and international standards. Technical Specifications: 4. Air Terminal (Lightning Arrester Rod): Type: Conventional Spike-type or ESE (Early Streamer Emission) Type, as per design requirement Material: Copper-bonded steel or GI rod, corrosion-resistant Length: 2.5 meters to 3 meters Diameter: ≥ 17 mm (rod type) Mounting: Proper bracket/foundation base on rooftop/solar structure 5. 2. Down Conductor: Type: Copper strip / GI strip / Copper wire Size: Minimum 25 mm x 3 mm for strip OR 6 SWG for copper wire Proper clamping and routing from lightning arrester to earthing pit 6. 3. Earthing System:Dedicated chemical earthing pit for lightning protection Copper-bonded/GI earth rod – 3 m length minimum Backfill compound for conductivity enhancement RCC chamber with inspection cover

Supply and Fixing of 63 Amp Porcelain Fuse Unit Scope of Work: Supply, Installation, Testing, and Commissioning (SITC) of 63 Amp Percelain Fuse Unit Technical Specifications Conductor: • Current Rating: 63 Amps • Operating Voltage: 415 V AC (commonly used in three-phase or single-phase systems) • Material: High-grade Porcelain (body), Brass/Copper (current-carrying parts) • Type: Rewireable Kit-Kat fuse • Mounting Type: Through-Hole or Panel Mount • Frequency: 50Hz