REPLACEMENT OF 10 Nos BER DECLARED OCB WITH 10 Nos HT VCBS ALONGWITH ASSOCIATED SWITCH GEAR AND HT CABLES FOR C NO 72 YAS AT NAVAL DOCKYARD MUMBAI

Dismantling, lowering, draining of insulating oil and removal of existing HT indoor type OCB of any make complete with its steel supporting structure, foundation bolts, operating mechanism, marshalling box etc from the existing location including control relays, power and control cables etc and making good the floor/wall openings to match the existing surface complete all as directed by Engineer-in-Charge. Note: The old unserviceable OCB along with accessories will be transported to BSO yard Kunjali by the contractor. The cost of transportation is included in the quoted rate.

Supply, installation, testing and commissioning of 12 kV, indoor, metal-clad made out of sheet steel CRCA, minimum 2 mm thick for load-bearing members, powder coated , floor-mounted, free-standing, dust & vermin proof, fully interlocked, air-insulated MV Switchgear Board-1 comprising of 2 Nos. Incoming VCB feeders + 3 Nos. Outgoing VCB feeders + 3 No. PT (Incoming- 02, bus PT- 01) compartment, suitable for 11 kV, 3-phase, 50 Hz, solidly earthed system, all as per latest IS 13118 / IEC 62271-100, IEC 62271-200 and other relevant standards, manufacturer’s recommendations, complete with foundation bolts, control cabling, earthing, testing, commissioning and handing over, all as specified and directed by the Engineer-in-Charge. Note : The technical specification for VCB Panel, PT and accessories will be as per ANNEXURE 5.0 to 8.0 of BOQ.

Supply, installation, testing and commissioning of 12 kV, indoor, metal-clad made out of sheet steel CRCA, minimum 2 mm thick for load-bearing members, powder coated , floor-mounted, free-standing, dust & vermin proof, fully interlocked, air-insulated MV Switchgear Board-2 comprising of 2 Nos. Incoming VCB feeders + 2 Nos. Outgoing VCB feeders+ 3 No. PT (Incoming- 02, bus PT- 01) compartment, suitable for 11 kV, 3-phase, 50 Hz, solidly earthed system, all as per latest IS 13118 / IEC 62271-100, IEC 62271-200 and other relevant standards, manufacturer’s recommendations, complete with foundation bolts, control cabling, earthing, testing, commissioning and handing over, all as specified and directed by the Engineer-in-Charge. Note : The technical specification for VCB Paneland accessories will be as per Item No 5.0 to 8.0 of BOQ.

Supply, installation, testing and commissioning of 12 kV, indoor, metal-clad made out of sheet steel CRCA, minimum 2 mm thick for load-bearing members, powder coated , floor-mounted, free-standing, dust & vermin proof, fully interlocked, air-insulated MV Switchgear Board-3 comprising of 1 No. Single Incoming/ Outgoing VCB Panel (ICOG) + 1 No. PT (Incoming), suitable for 11 kV, 3-phase, 50 Hz, solidly earthed system, all as per latest IS 13118 / IEC 62271-100, IEC 62271-200 and other relevant standards, manufacturer’s recommendations, including inbuilt power pack panel for controls, complete with foundation bolts, control cabling, earthing, testing, commissioning and handing over, all as specified and directed by the Engineer-in-Charge. Note : The technical specification for VCB Panel and accessories will be as per Item No 5.00 to 8.00 of BOQ.

Principal Ratings (a) Rated Voltage : 12 kV (b) Rated Continuous Current of Breakers : 630 A (c) Busbar current Rating : 1250 A (electrolytic grade copper, PVC sleeved / epoxy insulated) (d) Short Circuit Withstand current : 25 kA for 3 seconds (e) Rated peak current : 65.75 kA +/- 03 kA (f) Power Frequency Withstand Voltage (PFWV) : 28 kV (rms) (g) Lightning Impulse Withstand Voltage (LIWV) : 75 kV peak (h) Frequency : 50 Hz (j) Degree of Protection : IP4X (enclosure) (k) Control Voltage : 24 V DC (l) Spring Charging Motor : 230 V AC

VCB Panel Configuration - (Incoming and Outgoing) (Each Feeder comprises of following): (a) 12 kV, 800 A, 25 kA VCB (horizontal draw-out, horizontal / vertical isolation) (b) Dual-core CTs (CTratio: 400/5 Amps) (c) High Speed Tripping Relay (d) Multifunction meter, Ammeter & Voltmeter (96 Sqmm size) with selector switch (e) Indication lamps (ON / OFF / Trip / Spring Charged / Trip Circuit Healthy) (f) Control switches, master trip relay, trip circuit supervision (g) Automatic safety shutters, mechanical interlocks (h) Complete internal wiring

Bus PT Panel Comprises of following: (a) 3-phase draw-out type Bus Potential Transformer 11 kV / √3 / 110 V / √3 (b) Accuracy Class 0.5/ 100VA, burden (c) Digital Voltmeter 96 Sqmm size with inbuilt selector switch (d) Complete internal wiring

S&F in repair laying and Testing of XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavyduty) with aluminium conductor, 11000 volts Earthed, grade cross sectional area 240 sq. mm 3 Core on wall/ trenches complete all as directed by Engineer-in-Charge.

S&F in repair cable jointing kit for 11 KV grade cable for in door termination, heat shrink type, joint complete with jointing material and accessories suitable for 3 core XLPE, armoured, Al conductor cable of size 240 sqmm complete all as specified and directed.

S&F in repair Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 240 sqmm.complete all as specified and directed.