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| 1 | Designing, Supply, Erection, Testing & commissioning of indoor Type LT cubical panel enclosure (dust, vermin and interchangeable modules with facilites for extensions or reduction as per the space or requirments). The Panel shall be suitable for operation at 415+6% Volts, 50HZ, 3 phase 4 wire & earth system. The assembly manufacturer should be ISO approved and CPRI tested for short circuit of (minimum 50kA) as well as IP degree of protection (IP 54/55).Fabrication:- Panel shall be made from 14/16 SWG CRCA sheet, conforming to IS 8623/1977-82. The sheet metal used for the fabrication of control panel will be 2mm for load bearing member’s door and fittings plates etc. the partitions and other non load bearing members will be fabricated out of 1.6mm sheet, the sheet will be of mild steel CRCA type. The base channel will be made out of 75 x 40 x 5mm rolled channel. The door should be double folded without edge and the gasket should be ‘S’ type puffed neutral rubber gasket for long life. The hinges of the door should be bolted type with double hole arrangement. The panel door lock should be quick openable type spring loaded. There should not be any special tool or key to open the lock. Minimum depth 400mm / wide 300 mm for busbar/ Cable ally at the front of the panel. The panel will be free standing floor mounting type having provision for cable entry from bottom/top with cable glands etc. The fabrication should be such that all the member i.e. vertical/horizontal should be detachable type i.e. total bolted. In case of any changes required at site. it should be possible then and their self without any cutting or welding. The fabrication of the panel in 3B construction fully compartmentalized type i.e. bus bar chamber as well as the cable chamber should be totally isolated from the feeder chamber. Where there crossing of the wire or bus links. It should have proper rubber gourmets or non-hygroscopic material. No live part should be in visible condition. Painting:- The sheet metal is sprayed with corrosion resistant etch Primer. The finishing treatment shall be applicable with air drying paint (7/9 tank Powder coated process should present in company pemises) after necessary putty work . Busbars:-The panel shall be provided with TPN aluminium busbar of suitable size according to the size of MCCB's. Busbar shall be of high conductivity (53% to 58%) E91-E Grade aluminium (1A/Sq.mm). All Busbar will be air insulated with codified in Red, Yellow, Blue & Black as per standard for cable termination with the help of extended busbar only with proper adjustable cable supports. The main busbar would be supported upon non-hygroscopic SMC/DMC supports. |
| 2 | Metering:-The panel shall be completed with digital metering unit (with selector switches, voltmeter & ammeter) epoxy insulator, gasket, PVC sleeves, CT's & L.E.D. type indicator etc. Manufacturer of Panel should be CPRI Approved (Approval not older then 5 years) & ISO certified (Manufacturer workshop as per ISO 9001: 2015 standard) The Concerned contractor shall be approved the detailed drawing of panel with complete specification from the Engineer in charge at site.Detail of capacities of MCCB's to be installed in the cubical panel Enclosure (Excluding the cost of MCCB's) as per following:- |
| 3 | LT Panel enclosure having space for 1No. Incomer MCCB 400Amp. and 4Nos. outgoing MCCB's 100amp. to 160amp. according to the requirement at site (Approx. size 2025 x 1100 x 400mm) |
| 4 | MCCB's (FOR PANELS & SHEET ENCLOSURE): Supply and erection of Moulded Case Circuit Breaker (Panel mounting Cubical type) in the existing Cubical Panel (confirm to IEC:60947-2) having Ics=100% Icu, 100% neutral with spreader terminal links, Extended rotary handle and relevant PWD general specifications complete with G.I. Bolts, Nuts & Connection on both sides of MCCB with suitable size of thimbles etc:- |
| 5 | MCCB Four Pole 125amp., 415volts, ≥25kA Fixed Magnetic and Adjustable Thermal Setting |
| 6 | MCCB Four Pole 400amp., 415volts, ≥36kA Microprocessor Based Adjustable Thermal and Magnetic Setting |
| 7 | XLPE INSULATED HT ARMOURED CABLES (LOOSE): Supply & laying of Circular Aluminium Conductor screened with extruded semiconducting compound, XLPE insulated, insulation screened with extruded semiconducting combination in combination with copper tape (0.3KA for 1sec.) cores laid up, FR PVC inner sheathed, galvanized steel strip armoured and overall FR PVC sheathed cable confirming to IS:7098 (Part-2), 2011 working voltage 11KV(E) grade to be laid loose in the existing trench or pipe:- |
| 8 | HT Cable Overall size 50sq.mm (3Core) |
| 9 | S/E of Heat shrinkable cable end termination/ Straight through joint kit for 11 KVA /6.6 KV (E) XLPE Cables as approved & desired by Enginer in charge:- |
| 10 | Heat Shrinkable End Termination for cable size 50-95 sq. mm, 3Core (Indoor Type) |
| 11 | XLPE INSULATED ARMOURED CABLES (LOOSE): Supply, laying and erection of aluminium conductor XLPE insulated PVC sheathed armoured and served cable 1100 volts grade as per IS 7098 (Part-1)1988 to be laid loose in the existing trench or pipe as per PWD General Specifications:- |
| 12 | Overall size 70sq.mm (3½ Core) Armoured (Loose) |
| 13 | Supply and erection of Double Walled Corrugated (DWC) HDPE pipe to be laid 1mtr. below ground level including excavation placing the pipe in position and back filling with excavated soil etc. of the required size:- |
| 14 | Double Walled Corrugated HDPE Pipe 120/ 103.5mm (Outer/ Inner dia.) |
| 15 | COPPER EARTHING (Upto 8 metre in Length): Earthing with electrolytic Copper Tape rivetted (with 5Nos. copper rivets)/Steel Nut & bolts (with 4Nos. 32mm long, 8mm thick with washer and double nut) to 30cm x 120cm x 2mm thick copper plate (made cylindrical) burried 4.50 metre (14.76 feet) below ground level in the hole of excavation having bore dia. 125mm and surrounded by salt & charcoal dust mixture (20 kg.) including fixing the Copper Tape recessed in wall and in floor etc., up to 8metre in Length (including bore Length). G.I. pipe 20mm dia. (A-class), 3metre long should be laid in the hole of excavation 1 feet below ground level and having GI Reducer 50mm x 20mm with PVC Cap (For pouring water) fixed on the top level of the pipe. 300mm x 300mm x 300mm deep haudi of First class bricks finished with 1:4 cement plaster and haudi covered with cast iron lid having size 300mm x 300mm (Heavy) around the hole of excavation:- |
| 16 | Earthing with 25mm x 3mm Copper Tape (upto 8Metre in Length) |
| 17 | MS SHEET ENCLOSURE FOR MCCB's: Supply & Erection of indoor type MCCB enclosure of suitable size having provision for MCCB with extended rotary handle. The Enclosure shall be made from 14/16 SWG CRCA sheet, confirming to IS 8623/1977-82. The door should be double folded without edge and the gasket should be ‘S’ type puffed neutral rubber gasket for long life. The hinges of the door should be bolted type with double hole arrangement. The Enclosure door lock should be quick openable type spring loaded. There should not be any special tool or key to open the lock. The Enclosure will be wall mounting type having provision for cable entry from bottom/top with cable glands etc. The sheet metal is sprayed with corrosion resistant etch primer. The finishing treatment shall be applicable with air drying paint (7/9 tank Powder coated process should present in company pemises) after necessary putty work:- |
| 18 | MS Sheet Enclosure having provision for MCCB 40-160Amp.with extended rotary handle (Approx. Size 500mm x 300mm x 200mm) |
| 19 | AIR CIRCUIT BREAKERS: Supply & erection of Air circuit-breaker of suitable ampere rating at 415V, 50Hz, 4 Pole Electrical draw-out type with inbuilt microprocessor based trip sytem with thermal memory, zone selective interlocking, pre trip alarm, individual fault indicating LED, O/C, S/C, Instantaneous & E/F internal protection, Impulse withstand voltage 12kV, rated insulation voltage 1000V, rated operational voltage 690V, fully rated neutral, protection against overload & shortcircuit with setting at 50%-100%-OFF, suitability for isolation as per IEC 60947-2. The ACB should be capable for recording 10 fault history, LCD Display of current & voltage, Icu = Ics = Icw (1 Sec.) = 50kA with no derating upto 50 degree celcius on the existing industrial panel (With terminal adapter on load and line side of breaker), including bonding to the existing earth and making necessary connections with suitable size of thimbles as required by the Engineer-in-Charge at site and as per PWD General Specifications:- |
| 20 | Air Circuit Breaker Four Pole, 800amp., 415volts (Electrical Draw-Out Type) |
| 21 | Vacuum Circuit Breaker Supply, Erection, Testing and Commisioning of 11kV, 3Phase, 50Hz, Indoor metal clad, floor mounted, 'Horizontal draw out' type VCB (Vacuum Circuit Breaker) switch board unit 630 Amp. which includes 630/800 Amp. Vacuum Circuit Breaker for Incoming/ Out going feeder with Electrolytic Copper bus bars of suitable rating, Horizontal Isolation type as per IEC 62271-100-200. The Switchgear panels shall be sheet steel construction with sheet steel construction not less than 2.5mm thickness for load bearing sections and not less than 2mm thickness for non-load bearing, dust, moisture and vermin proof to provide a degree of protection IP-4X in accordance with IS:13947. VCBs are type tested according to International Standards IEC-62271 at renowned laboratories. They are compact, safe and reliable. The Panels shall be tested for IAC level of 25kA/1 Sec. No. of operations of Vacuum interrupter bottles for better performance (i) At rated current: 10,000 operation (ii) No. of short circuit dead operation at rated short circuit current: 50 opeartions |
| 22 | VCB parameters are as below.(a). Rated Voltage: 12kV(b). Rated short circuit breaking current withstand: Min, 25kA for 3sec.(c). Rated insulation voltage lightning (Impulse withstand): At 75kV Peak(d). Rated insulation voltage(Power frequency withstand): Min. 28kV(e). Rated operating sequence: 0-0.3 sec - CO-3 min-CO(f). Spring charging mechanism: Manually as well as motor operated (230V, AC, 50Hz)( g). Operation type: Manually and electrically open (Electrical-230V, AC, 50Hz)(h). Earthing Switch: Mechanically interlocked device to prevent personnel from getting electric shock during breaker maintenance.VCB incorporating mechanical as well as electrical ON/OFF indiaction \\"OFF\\" push button, test/serviceposition limit switches, with minimum 6NO+6NC breaker auxiliary contacts in service position, Manual charging of breaker should be done without opening the front door. |
| 23 | Incomer shall consist of:(a). Cast Resin CT's 11kV: 600-300/1-1A, Core1: Class1, 10VA for 3phase, Core2: 5P10, 10VA(b). Cast Resin PT's 11kV: PT Ratio 11kV/√3/110V/√3/110V/V3, Class 1, Class 0.5 Burden 50VA(c). Protections: Numerical instantaneous IDMTL mimic dispaly relay (230V, AC, 50Hz): UV, ON, E/F, O/C, S/C & TCS with RS 485 Modbus protocol for communication & drawout type(d). Master Trip/ Anti pumping relay(e). Digital Voltmeter: Range 0-12kV with necessary voltmeter with built in selector switch & suitable for 230V AC 96x96 sq.mm dial with shrouded terminal.(f). Digital Ammeter: Applicable Range with necessary ammeter with built in selector switch & suitable for 230V AC 96x96 sq.mm dial with shrouded terminal.(g). Multi-function meter with suitable communication to Central Software dta control & SCADA system, Converter having facility of real time data monitoring, historical trend and web dashboard (h). Necessary AC supply, healthy indication lamp & switch, TNC (Trip, Neutral & Close) breaker control switch with indicating arrangement, Local/ remote selector switch for breaker open/close operationsAll the relays shall belong to a common platform and shall be of single make with Electro-mechanical type relays in draw-out casing. PCB shall be with conformal coating to withstand heavily polluted environments. |
| 24 | Outgoing shall consist of:(a). Cast Resin CT's 11kV: 600-300/1-1A, Core1: Class1, 10VA for 3phase, Core2: 5P10, 10VA(b). Protections: Numerical instantaneous IDMTL mimic dispaly relay: E/F, O/C, S/C & TCS with RS485 Modbus protocol for communication & drawout type for line feeder protection(c). Master Trip/ Anti pumping relay(d). Transformer Protection 3 elements auxiliary relay (230V, AC, 50Hz) for transformer fault, Alarm for Buchholz, winding temperature & oil temperature(e). Digital Ammeter: Applicable Range with necessary ammeter with built in selector switch & suitable for 110V AC 96x96 sq.mm dial with shroded terminal(f). Multi-function meter with suitable communication to Central Software dta control & SCADA system, Converter having facility of real time data monitoring, historical trend and web dashboard(g). Necessary AC supply, healthy indication lamp & switch, TNC (Trip, Neutral & Close) breaker control switch with indicating arrangement, Local/ remote selector switch for breaker open/close operationsAll the relays shall belong to a common platform and shall be of single make with Electro-mechanical type relays in draw-out casing. PCB shall be with conformal coating to withstand heavily polluted environments:- |
| 25 | 11kV, 3Phase, 50Hz, Indoor metal clad, floor mounted, 'Horizontal draw out' type VCB (Vacuum Circuit Breaker) Switch board unit 630 Amp. which includes 1 No. 630 /800Amp. Vacuum Circuit Breaker for Incoming/ Out going feeder with in built power pack. |
| 26 | 250 KVA Transformer 1.Type & Make of Transformer : 3 Phase, Oil Cooled Power Type,Transformer2. Normal Continuous Rating (In MVA) : 250 KVA3. Reference Standard : As per IS 1180 LEVEL 2 (Amendment- 4) 4. No Load Voltage Ratio (In KV) :a. High Voltage : 11 KV b. Low Voltage : 0.433 KV 5. Winding Material : Copper 6. Connection (HV/LV) : Delta /Star7. Vector Group : Dyn11 8. Frequency : 50 Hz 9. Tapping on HV Winding for HV Variation : +5 % to -10 % in steps of 2.5 % each10. Type of Tap Changer : Off Load Tap Changer 11. Steps / Positions of Tap Changer : 6 Steps / 7 Positions12. Temperature Rises (above ambient 50°C) :a. Top Oil : 40° Cb. Average winding : 45° C13. Terminations : a. High Voltage Side : Cable Box b. Low Voltage Side : Cable Box c. Orientation : 180°14. Type of Cooling : ONAN 15. Duty/ Location : Outdoor 16. Altitude above Sea Level : Up to 1000 M17. Losses at 50% Load : 920 Watt (Max)18. Losses at 100% Load :2700Watt (Max)19. Impedance at 75° C : 4.50% (IS TOL) 20. Insulation Level :a. HV (KVp / KVrms) : 75/28b. LV (KVp / KVrms) : -/321. Efficiency & Regulations : @ Unity P.F. @ 0.8 P.F a. At 100% of Load : 98.94% 98.67% b. At 75% of Load : 99.12% 98.91%c. At 50% of Load : 99.27% 99.09% d. At 25% of Load : 99.24% 99.05% e. Regulations @ 100% of Load : 1.041% 3.439%f. Maximum Efficiency : 99.299%@37.394%Load |
| 27 | A. OCTC Fittings:-1. 1 Rating & Diagram Plate-Anodized Aluminum 2. 2 Earthing Terminals. 3. 4 Lifting Lugs4. 1 Oil Level Indicator with Minimum Level Marking5. 2 Thermometer Pockets 6. 1 Conservator (Without Air Bag Type) with oil filling hole with cap and drain plug.7. 1 Air Release Plug. 8. 2 Silica Gel Breather 9. 4 Bi-Directional Rollers 10. 4 Jacking Pads11. Radiators with lifting Lugs 12. First Filling of Oil .13. Epoxy Paint with Shade631 of IS:5 14. 1 Explosion Vent With Diaphragm15. 1 Bottom Drain Cum Filter Valve 16. 2 Inspection Cover 17. 1 Top Filter Valve 18. 1 Off Load tap Changer (OCTC)B. Accessories:-1. 1 Buchholz Relay with Alarm & Trip 2. 1 Oil Temperature Indicator with Alarm & Trip Contact (2A).3. 1 Winding Temperature Indicator with Alarm & Trip Contact (2A).4. 1 Marshalling Box Please Enable Macros to View BoQ information |
