PROVN OF 11 KV SWTICH GEAR AND UP GRADATION OF TRANSFORMER AT AF STN DEESA UNDER GE AF BARODA

Supply, installatons,testing, and commissioning of 4 way- 11 kV SF6 Insulated outdoor one side extensible cubical type Ring Main Unit Comprising of 1 no Incoming LBS and 3 Nos Outgoing SF6 Insulated VCB’s Type C+VVV SF6 insulated, 11 kV vacuum circuit breaker ring main unit contained within a metal clad enclosure thickness of sheet min 3.15 mm thick, duly power coated (7 tank treatment) having degree of protection to IP-54, suitable for outdoor use, free standing and comprising of :- (i) Outgoing circuit breaker 03 Nos.– 630 Amp triple pole, Motor operated vacuum circuit breaker encapsulated in SF6 Stainless Steel Tank with independent spring mechanism and fully rated earth switch with provision for earth of the cable. (ii) Outgoing circuit breaker 03 Nos. - Air insulated cable boxes with split gland plate suitable for a bottom entry 3 core cable up to 185 sq. mm (iii) Incomer load break switch 01 No. - 630 Amp triple pole, single break, 3 position (ON, OFF & EARTH) ring main Isolator with independent manually charged spring mechanism and fully rated earth switch. (iv) Incomer load break switch 1 No. - Air insulated cable boxes with split gland plate suitable for a bottom entry 3 core cable up to 185 sq. mm (v) The Ring Main Unit/secondary GIS will be complete with: (a) Mimic diagram on front panel complete with status indicators - 01 No, (b) Set of positive standard mechanical interlocks- 01 No (c) Set of current transformers for protective relays CT ratio 100-50/1 A class 5P10 Burden epoxy resis cast 2.5VA for VCB- 01 Set