REPAIR/MAINTENANCE OF MRS, HT LINE AND ALLIED WORKS AT ZANGLI, DRUGMULLA, CHAKKIGAM, TREHGAM, PATHAHIRI, PANZGAM, CHOWKIBAL, NIYARI, TANGDHAR, KANZALWAN, BANDIPUR AND DAWAR UNDER GE 874 EWS

Routine Annual Repair/ Servicing of HT panel having VCB/ OCB/ Transformer Bus Bar Unit of 11 KV rating of capacity 26.2 KA and current rating of upto 800 Amps, by adjustment of gaps for smooth functioning, and works as detailed below:- (a) Cleaning of VCB/ OCB and removing dust particles complete all as specified. (b) Checking the arcing gap contact of the VCBs/ OCBs if gap exceeds the permissible limits, readjust, complete all as specified. (c) Cleaning of male & female contacts by using CTC/CRC/Thinner as required all as specified. (d) Adjust the relays of earth fault current / over current/short circuit current levels as per recommendation of manufacture guidelines all as specified. (e) Dismantling and cleaning the insulated surface CTC and CRC complete all as specified. (f) Checking/ Repair of any electrical wiring for electrical /manual operation of panel including measuring IR values. (g) Checking of nuts and bolt, springs, levers, latches, connectors etc. and adjustment as required complete all as specified. (h) Recording IR values of CT's and PT's. (j) Checking of all moving parts for proper functioning of VCBs/ OCBs and adjustment as per manufacture recommendations Note :- Service shall be carried through service Engineer of Manufacturer/ Authorised Service Agency only.

Overhauling of HT panel having VCBs/ OCBs 11 KV rating of capacity 26.2 KA and current rating of upto 850/630 Amps, by replacing defective/ worn out parts, and all works as in for routine service as per ser item No 01 above. Note :- (i) Service shall be carried through service Engineer of Manufacturer/ Authorised Service Agency only (ii) The VCB/ OCB shall be provided with an all inclusive warranty of six months from the completion of the contract. If the VCB/ OCB becomes faulty during this time and is not rectified again by the contractor within 96 hours of intimation, the cost of the repair/ overhauling, including all parts used, shall not be paid to the contractor and any such costs already paid in RAR shall be deducted in Final RAR/ Final Bill. This shall be assumed as an AMC towards the HT panel having VCB/ OCB

Taking out old tripping relay from VCBs and renewing with new relay of suitable capacity (to suit 800 Amps HT Panel) and tripping timing, complete all as specified directed and clarified by Engineer-in-Charge.

Renewal of IDMT relay as per existing rating (to suit 800 Amps HT Panel) of make Alstom/Avrevaor ABB or Siemens to the existing panels and programming the relays for overload and earth fault setting with respect to trip setting of HT panels installed at 11 KV sub station in such a way that fault are arrested locally complete all as specified and as directed.

Renewal of HRC fuse of rating 2 to 6 Amps of any type to suit existing system all as specified and directed.

Renewal of tripping coil with plunger with working voltage 110 Volts DC suitable for existing panel complete all as specified and directed.

Repair of HT current Transformer - potential Transformer combination metering unit, by renewal of unserviceable components (copper winding to be measured separately), duly calibrating, and connecting with the meter, complete all as specified and directed by Engineer-in-Charge.

Renewal of burnt/ unserviceable defective copper coil CT/PT (any type) with new one made out of suitable size/ gauge of copper super enamelled wire of high quality matching with the existing impendence and insulated complete all as specified and directed by Engineer-in-Charge. Note :- (a) The quoted rate shall be inclusive deemed of cost of varnish, insulating paper and other insulating materials and no extra payment will be made for the same. (b) The quoted rate shall be deemed inclusive of disconnecting of all electrical connections and transportation of transformer from site to reputed repair workshop and back including reinstalling & reconnecting electrical connection and no extra payment will be made for the same. (c) The quantity may be increased as required for ibid repair, without additional agreement of contractor required.

S&F in renewal steel tubular swaged poles erected truly vertical or planted as strut complete with 300 x300x 6 mm thick mild steel base plate, welded to pole, B-118 final, taper cap, bolts, nuts & screws, poles made out of ERW MS tubing conforming to IS-2713 Part-II. type 410 SP-55 (11.0 metres long) including taking down drilling of holes of reqd size for fixing of cross arms, painting the exposed surfaces of pole with two coats of aluminium paint over a coat of red oxide zinc chrome primer and with two coats of black bituminous paint internally & portion embedded in concrete, making five black & red bands at lower portion of pole each 300mm wide alternately, and making pole No. with black paint at suitable height all as specified and directed.

Supply only of duct tape (for seaming, sealing, patching and repairing works in electrical cable/ plumbing lines), 2 inches (50 mm) wide and 60 yards (54.8 meters) long, made of gauze textile fiber, with a hot-melt adhesive coating, silver colour, PN-20 strength, of make of 3M/ Amazon basics or equivalent, complete all as specified and directed by Engineer-in-Charge.