PROVN AND INSTALLATION OF UNDER GROUND ELECTRIC HT CABLE SYSTEM AND SUPPLY INSTALLATION OF VACUUM CIRCUIT BREAKER DIGITAL TYPE 11 KVA AT GREF CENTRE PUNE 15 THROUGH EXECUTION CONTRACT

Amount

For Supply and installation work

Supply, install, testing and commissioning of outdoor type one side extensible motorized operated type 11 KV 630 Amps, 20 KA for 3 Sec, SF6 instulated Ring main unit consisting of 1 Nos incomer feeder and 5 Nos outgoing VCB with metering and CT & PT with separate control desk. CT Ratio for incomers 200-100/1 A, 2.5 VA and for outgoing 60/1A, 2.5VA with necessary mounting arrangement such as PCC fdn, MS foundation bolt, nuts & washers complete comprising the following (Make: ABB/ C&S/L&T) :- Total number of modules 7 pcs - (M+V+VVVVV) (A) STANDARDS AND MECHANICAL DATA (i) Metal Enclosed switchgear: IEC 62271-200, (ii) General Purpose switches: IEC 60265-1, (iii) Disconnectors and Earth Switch : IEC 62271-102 (iv) Switch Fuse Combination: IEC 62271-105, (v) Circuit Breakers: IEC 62271-100, (vi) Common Clause : IEC 60694, (vii) Pressure of SF6 gas : 1.4 bar at 20 Degree Celcius, (viii) Cable Bushings : DIN 47636, (ix) Temperature class :- -25 to + 40 Degree Celcius, (x) Degree of protection :- (SF6 tank - IP 67, Front Cover- IP 2X & Cable Cover - IP 3X), (xi) Busbars / Earth bar (external) - 240 /120 Sqmm copper, (xii) Bolt size - M10, (xiii) Thickness of SS Gas tank - 2.5 mm, (xiv) Colours - RAL 7035 (B) ELECTRICAL DATA 12 Kv (I) System Parameters: (i) Model of RMU - 01 Incomer VCB + 05 outgoing VCB + 01 Metering module, (ii) Network - 3 phase, (iii) Nominal voltage - 12 Kv, (iv) Service Voltage - 11 Kv, (v) Rated Frequency - 50 Hz, (vi) Rated Current busbar - 630 A, (vii) Min Gas pressure – 0.05 Bar, (viii) Filling pressure- 0.3 Bar, (ix) Internal Arc test As per IEC- 21 KA for 1 sec duration. Cable Box tested for Internal Arc – 21 KA / 1 Sec AFLR, (x) Lightning Impulse withstand Voltage - 75 kV, (xi) Power Frequency withstand voltage - 28 kV rms - 1 min, (xii) Rated Normal Current - (Incomer & Feeder Circuit breaker - 630 A), (xiii) Rated Short time current withstand (1 sec ) - 21 kA for 3 sec duration, (xiv) Rated Short circuit making capacity of line switches and earthing switches - 52.5 kA peak at Rated Voltage, (xv) RMU Type - Motorized (II) Outgoing (Five Numbers VCBs panels) Each consisting of :- (i) 01 Number Vacuum circuit breaker 12 Kv, 630 A, three position isolator/earthing switch, busbars, interlocking, earthbar and stored spring energy mechanism (EL-mech), (ii) Standard Cable cover with interlocking, (iii) Self powered Over Current and Earth fault protection realy with RS485 port and relay (Make of Relay :- Ashida / L& T), (iv) Stored Energy Mechanism and control voltage 24 V DC for motor operation, (v) Capacitive voltage indication fixed type VPIS, (vi) Cable bushings interface C, 630 A, (vii) Aux switch for VCB Position 2NO + 2NC, (viii) Cable support bars, standard for 1-way unit, (ix) Digital Ammeter, (x) Ring core current transformer type 60/1A, 2.5 KVA, 5P10 for protection & Class 0.5 for metering., (xi) 12 Window Annuciator with hooter for outgoing Modules, (xii) Aux Transformer protection relay & Master Trip relay (III) Air Insulated Metering Module consisting of :- (i) 01 Number Air Insulated Metering module 12 Kv, 630 A, (ii) Bushings outside cone interface C for connection of external busbar, (iii) Primary Voltage : 12000 Volts 3 phase & Secondary voltage 110 Volts 3 Phase, (iv) Number of metering windings:1, Burden Windings - 1:50 VA Class winding 1:0.5, (v) Under votage & Over voltage Relay, (vi) Operating Handle, 2 Nos x 12 Volts DC 48 AH Battery and Battery Charger.

Supply, Laying and testing and commissioning XLPE, cable , PVC insulated, screened PVC bedded galvanised steel strip or wire armoured electric power cable, heavy duty with aluminium conductor 11000 Volts grade (earthed), 3 core 120 sqmm laid in trenches / floor / duct / fixed on poles / through GI tubing including provn of suitable size aluminium cable lugs, nut, bolt and washers and connecting to the pole / AB switch / any description complete all as specified. (Make :Havells/Polycab/ Finolex) Note : Excavation, returning in filling and removing the exavated soil shall be carriied out by the department as free for laying cable only and the cost of the same is excluded in the quoted rate.

S & F cable jointing kit for 11KV grade cable for Straight through joint heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 120 to 185 sqmm. (Make: 3M/Zicon/M-Seal) all as specified and directed by Engr-in-Charge

S & F cable jointing kit for 11KV grade cable for Outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 120 to 185 sqmm. (Make: 3M/Zicon/M-Seal) all as specified and directed by Engr-in-Charge

S & F cable jointing kit for 11KV grade cable for Indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 120 to 185 sqmm. (Make: 3M/Zicon/M-Seal)

M & L for Earthing complete with 99 % pure copper earth plate as electrode, 600x600x3.15 mm thick burried directly in ground (earth pit not less than 2.25m deep below normal ground level) connected to copper strip 25 x 3.15 mm thick dia by mens of nuts, bolts, & washers of brass as shown in of SSR Part-I plate No. 3, Connected to earthing test point all as specified and including necessary earth pit PCC 1:3:6 chamber be 50 mm thick PCC 1:2:4 chamber cover with 6mm dia mild steel reinforcement of 10 cm c/c spacing both ways in lieu of CI cover , watering arrangement shall be made with GI pipe light grade of 20mm dia including funnel and protection to earth lead shall be provided with GI pipe light grade 40 mm dia upto 7.5 Mtr from the earth plate electrode & refilling of soil etc including necessary excavation & earth work in any strata, salt and charcoal complete. and PCC chamber all as specified and directed by Engr-in-Charge.

Supply and laying of superior quality as approved by Engr In Charge RCC Half round 150mm dia 25/32 mm thick Pipe 1 Mtr length for cable protection all as specified and as directed by Engr In Charge.

Supply and fix GI Pipe light grade 100mm dia (for cable protection) with all necessary fixing arrangements such as GI clamps, nut, bolt and washers laid in trenches / fixed on poles / any description all as specified and directed by Engr-in-Charge

Supply and laying of sand for cable protection laid 8 cm below and 15 Cm above the cable incl compaction all as specified and directed by Engr-in-Charge

D N GUPTA and Co.

Vishal Enterprises