WORK OF DISMANTALING OF OLD 245 KV CB, ERECTION OF NEW 245 KV CB AND OTHER ASSOCIATED WORKS ON 220 KV BUS COUPLER BAY AT 400 KV S/S GORAKHPUR UNDER ELECTY. 400 KV TRANS. DIV. GORAKHPUR

Amount

Shifting and placing of chequarred plate, wooden sleeper etc at site at 220 KV Bus Coupler Bay in the switchyard for easy movement of crane as per requirement.

Isolating all the 3-phase poles of 220 KV existing (old erected) Circuit Breaker by opening of the connectors from both ends , again reconnect it at both ends of the breaker after installation & commissioning of new SF6 CB.

Complete dismantalling of various sizes & cores PVC Armoured copper control cables such as 2Cx2.5 mm2, 4Cx2.5 mm2, 7Cx2.5 mm2, 10Cx2.5 mm2, 10Cx2.5 mm2, 12Cx2.5 mm2 & 14Cx2.5 mm2 between old 245 KV CB switch cubical and control panel / Bay marshalling Box after proper identification & marking and its reconnection to the new 245 KV CB cubical switch and control panel after providing new ferrules, copper lugs, cable tags etc with all cost of men, T&P etc.

Dismantalling of following components of 220 KV 1250 Amp 40 KA SF6 CB after opening of 19 core between each phase control cable between each phase control block & switch cubicle for easy carriage of dismantled parts from the site to store/disignated place (up to approx. 500 Mtrs) as per direction of Supervising Engineer of the substation as per detail below. (Note: one job each for each ACDB of each day). (a) Chamber Insulator - 03 Nos. (b) Support insulator - 03 Sets. (c) pole operating mechanism - 03 Nos. (d) Control Cubicle - 01 Nos. (e) Support Structure - 03 Nos. (f) Ladder with platform- 03 sets.

Drilling by gas welding & smoothing of 04 Nos. Holes of 24 mm dia. as per drawing of base structure for fastening of support structure. in previousely fixed 1000 x1000x25 mm plate and new bolt of 03 nos. 220 KV SF-6 circuit breaker structures

Supply and fixing of 24x150 mm S.S bolts with spring and flat washer for erection of 03 Nos. 220 KV SF-6 Circuit breker structures.

Erection of new 220 KV SF-6 Circuit Breaker (GE T&D make) complete with accessories & structure by assembling all part with bolts & nuts at 220 KV bus Coupler Bay as per drawing in Supervising of M/S GE T&D Service Engineer and supervising Engineer along with shifting of 220 KV SF-6 CB from store to site.

Laying of 20/19 core control cable between marshalling box and each phase control block and making interb phase wiring between marshalling box and each phase control block for proper closing & tripping of 220 KV SF-6 CB in local & remote made by opening the trench cover and again putting after completion of work.

Termination of dismantled cable wire from control panel to the CB marshalling box with work of fixing cable gland, ferruling and making lug on wire as per drawing and making bunch with tag material.

Making Earthing of 220 KV SF6 CB, cubicles and platform by laying of M.S. flat of size 75x10 mm and 50x 6mm after digging pit, making lap joint of flat of 75 mm for flat to flat joint and semicircle joint for main earth mat M.S. Rod of 40 mm by making electric welding as per technical specification, cleaning of welded joint, painting with one coat of red oxide & two coat black bituminous below ground level.

Painting of M.S. Flat of size 75x10 mm & 50x6 mm with one coat of red oxide primer & two coat of synthetic enamel paint of green colour after cleaning the surface.

Misc work like making vaccum of poles 220 KV CB and filling of SF6 gas and checking for leakage of gas checking ON/OFF position and helping for testing and commissioning of CB to Complete the job.

Shifting and placing of chequarred plate, wooden sleeper etc from site to store after completion of work as per requirement.

Stringing and proper sagging of ÿ"phase 220 KV jack Bus of 220 KV Bus Coupler by twin moose conductor the work includes fitting of twin tension clamps, hoisting of 70/90/120 KN Disc insulator, tension fitting, spacer PG clamps etc and cutting of conductor from carrige of conductor from store work as required with all cost of men and T&P required for the work.

Fixing of 220 KV Single moose suspention fitting under 220 KV Main- l Bus bar below the gantry with suitable hardware such as hoisting of disc insulator (70/90/120 KN) etc including jumpering from bus to section isolators of 220 KV Outgoing - l with all cost of men and T&P to complete the job.

Harshit Enterprises

M S Traders