REPAIR/MAINT OF HT , 33KV , 11KV TRANSFORMER GOD, VCB, RMU ,HT OVERHEAD LINE AND UG CABLE AT AF STATION GORAKHPUR

Amount

Taking down existing PVC/XLPE cable from trench, pole etc cutting faulty/ burnt cable for repair and relaying / refixing on existing position complete all as specified and directed by Engineer-in-Charge. Note : Necessary execavation , aluminium lugs , insulation tape and connected items will be deemed to be included in the quoted rate.

Excavating in trenches (soft/loose/dense soil), n.exc. 1.5metre wide and n.exc. 1.5metre deep and getting out complete all as specified and directed by Engineer-in-Charge.

Returning filling in foundation / trenches including spreading leveling, watering and well ramming in layers not exceeding 25cm thick in soil complete all as specified and directed by Engineer-in-Charge.

Removal of surplus excavated material to a distance n.exc. 50 metre and depositing where directed at a level n.exc. 1.5 metre above starting point complete all as specified and directed by Engineer-in-Charge.

Supply and spreading clean and dry screened sand (unwashed) in trenches around the cable for cushioning complete all as specified and directed by Engineer-in-Charge. Note :- Punned thickness shall be measured.

Supply and laying un-reinforced precast concrete cable cover class HVP type 2 with peak size 450 mm x 180 mm x 40 mm complete all as specified and directed by Engineer-in-Charge.

Supply, laying & testing cross linked polyethylene insulated (XLPE) galvanised steel strip armoured cable with aluminum conductor, 11 KV `E’, of cross sectional area 95 Sqmm, three core (IS-7098) in trenches/through pipes/ducts or on poles road crossing etc including taking out of old Cable complete all as specified and directed by Engineer-in-Charge. Note :- (i) Excavation, earthwork, cable protection cover, cable joint, sand cushioning shall be measured and paid for separately under respective item of this schedule. (ii) Old cable, cable joint, brick cover, pipe etc shall be contractor property and necessary amount as per schedule of credit shall be deducted from contractor's due payments.

Supply, laying & testing cross linked polyethylene insulated (XLPE) galvanised steel strip armoured cable with aluminum conductor, 11 KV `E’, of cross sectional area 120 Sqmm, three core (IS-7098) in trenches/through pipes/ducts or on poles, road crossing etc including taking out of old Cable complete all as specified and directed by Engineer-in-Charge. Note :- (i) Excavation, earthwork, cable protection cover, cable joint, sand cushioning shall be measured and paid for separately under respective item of this schedule. (ii) Old cable, cable joint, brick cover, pipe etc shall be contractor property and necessary amount as per schedule of credit shall be deducted from contractor's due payments.

Material and labour for cable jointing kit for 11 KV (earthed) heat shrinkable type joint (end termination), out door terminitation suitable for cross sectional area 95 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories including earth work (excavation in trenches in any type of soil, return filling in layers not exceeding 15 cm thick and removing excavated material not exceeding 50 mtr) complete all as specified and directed by Engineer-in-Charge.

Material and labour for cable jointing kit for 11 KV (earthed) heat shrinkable type joint (end termination), out door termination suitable for cross sectional area 120 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories including earth work (excavation in trenches in any type of soil, return filling in layers not exceeding 15 cm thick and removing excavated material not exceeding 50 mtr) complete all as specified and directed by Engineer-in-Charge.

Material and labour cable jointing kit for 33 KV (earthed) heat shrinkable type joint (end termination), out door termination suitable for cross sectional area 240 to 300 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories including earth work (excavation in trenches in any type of soil, return filling in layers not exceeding 15 cm thick and removing excavated material not exceeding 50 mtr) complete all as specified and directed by Engineer-in-Charge.

Material and labour for cable jointing kit for 11 KV (earthed) heat shrinkable, straight through joint suitable for cross sectional area 95 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories including earth work (excavation in trenches in any type of soil, return filling in layers not exceeding 15 cm thick and removing excavated material not exceeding 50 mtr) complete all as specified and directed by Engineer-in-Charge.

Material and labour for cable jointing kit for 11 KV (earthed) heat shrinkable, indoor termination suitable for cross sectional area 95 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories including earth work (excavation in trenches in any type of soil, return filling in layers not exceeding 15 cm thick and removing excavated material not exceeding 50 mtr) complete and cutting of old cable complete all as specified and directed by Engineer-in-Charge.

Material and labour for cable jointing kit for 11 KV (earthed) heat shrinkable, indoor termination suitable for cross sectional area 120 to 185 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories including earth work (excavation in trenches in any type of soil, return filling in layers not exceeding 15 cm thick and removing excavated material not exceeding 50 mtr) complete and cutting of old cable complete all as specified and directed by Engineer-in-Charge.

Material and labour for cable jointing kit for 33/11 KV (earthed) heat shrinkable touch proof type joint , out door terminitation suitable for cross sectional area 300 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories including earth work (excavation in trenches in any type of soil, return filling in layers not exceeding 15 cm thick and removing excavated material not exceeding 50 mtr) complete all as specified and directed by Engineer-in-Charge.

Dismantling of unserviceable air break gang operated switch 11000 Volts grade from overhead HT Line structure vertical/ Horizontal mounted including insulators and operating mechanism complete all as specified and directed by Engineer-in-Charge.

Supply, installing, connecting and commissioning switch air break gang operated, triple pole, vertical mounted, out door type of 12 insulators, mechanically operated, mounted on insulators and steel frame, with operating mechanism and operating rod of 25mm bore GI pipe heavy grade worked from ground level, with locking arrangements including brass pad locks with key (Make. Godrej/Harrison/Link) for current rating 200 Amp at 11 KV, complete with drop out fuse set fuse carrier and fuse elements having 100 Amp at 11 KV connected with new ACSR conductor complete all as specified and directed by Engineer-in-Charge. Note :- Quoted rate shall be deeemed to include the cost of steel frame, GI pipe of suitable length including drop out fuses.

Supply & fixing lightning arrestor explusion type (set of three), self supporting class type suitable for 11 KV grade complete with all fitting for outdoor discharge capacity 65 KA complete including all clamps, nuts, bolts washers and connecting to earth with 32 x 6 mm GI strip including dismantling of existing lightening arrestor complete all as specified and directed by Engineer-in-Charge.

Boring of holes under road, pavement, hard standing by manually without damaging the surface for 80mm bore GI pipe complete all as specified and as directed by Engineer-in-Charge. Note :-(i) Depth of hole shall be 1.00 to 1.50 metre below the top surface of road / pavement / hard standing /Path. (ii) Pipe shall be measured and paid for separetely under respective item of this schedule.

Material and labour for defect rectification in HT 11 KV cable laid in trenches by locating fault with the help of electronic fault locator machine comprising of surge generator pules ECHP fault location with high frequency distance calculator etc. Excavation in any type of soil strata exposing the cable fault removal of deteriorated position of cable treating of cable and keeping the same ready for jointing work for cables of sizes upto 300 Sqmm 3 core complete all as specified and as directed by Engineer-in-Charge. Note :- The fault locator equipment will be brought at site within two hours of instruction received from Engineer-in-Charge

Restraining of HT overhead line conductor comprising of three run ACSR conductor and two run GI earth contunity conductor after opening from insulators, including restraining same and winding on insulator with proper size of binding wire upto permissible sag including cutting, trimming and vending tree branches along HT over head lines, after arranging electrical shutdown , including taking all precautions while working on lines using own T&P by the contractor complete all as specified and directed by Engineer-in-Charge. Note :- (i)Quoted rate shall be deem to included the cost of winding wire and replacement of insulator if damaged during restraining of conductor. (ii) Insulator shall be paid separately as supply only under respective item of this schedule. (iii) trimming of branches upto three meter from external conductor shall be trimmed/cut after obtaining necessary shut down in writing by the Engineer-in-Charge to avoid any casualty. (iv) Restringing of group of conductors shall be done as per standerd practice.

Disconnecting and taking out existing HT 33 KV C & R panel from housing and cleaning and overhauling the machanical parts including oiling, replacement of unserviceable trip coil and checking of all relay and making functional and reassembling the same after replacement of unserviceable parts as required and make the panel serviceable including making all electrical connection and testing complete complete all as specified and as directed by Engineer-in-Charge. Note :- (i) Servicing, checking and caliberation of VCB shall be carried out by the representative of OEM only using primary and secondary injection kit. (ii) All the test rocord for proper tripping of CTs, raising and lowering operation mechanism and proper tripping system of over current and earth fault relay shall be mentioned and signed by the contractor, Engineer-in-Charge and representative of OEM shall be produced before allowing payment to the contractor.

Supply in replacemet 12 volt battery including charging assembly (Power pack) as per sample suitable for 220/110 volts AC of 11 KV VCB (SF 6) complete all as specified and directed.

Supply in replacement of battery for C & R panel 180AH 12 Volts complete all as specified and directed.

Supply, installation, testing and commissioning 33 KV current transformer outdoor type (CTs) suitable for SF6 VCB single pole 3 core cast epoxy type of 15 VA burden, class 1, 5 P 10 and PS having turn ratio 100Amp/50Amp+5Amp incl taking out old material complete all as specified and directed by Engineer-in-Charge.

Supply, laying & testing cross linked polyethylene insulated (XLPE) galvanised steel strip armoured cable with aluminum conductor, 33 KV of cross sectional area 95 Sqmm, three core (IS-7098) in trenches/through pipes/ducts or on poles, road crossing etc including taking out of old Cable complete all as specified and directed by Engineer-in-Charge. Note :- (i) Excavation, earthwork, cable protection cover, cable joint, sand cushioning shall be measured and paid for separately under respective item of this schedule. (ii) Old cable, cable joint, brick cover, pipe etc shall be contractor property and necessary amount as per schedule of credit shall be deducted from contractor's due payments.

Taking out old earthing material and M& L for new Earthing complete with galvanised steel earth plate electrode 600x600x6mm thick directly burried in ground (earth pit not less than 2.25 m deep below ground level) with top edge of earth plate not less than 1.5metre below the ground level connected to GI strip 32x6 mm by means of bolts nuts check nuts and washers of galvanised iron at 2 points & GI pipe 40 mm bore medium grade for protection of earth strip, PCC chamber 1:3:6 (type C-1) using 20mm graded stone aggregate, funnel with wire mesh, 50 mm thick cover of RCC 1:2:4 type B-1 using 20mm graded stone aggregate reinforced with 8 mm MS bars at 150 mm centre to centre both ways, CI frame and charcoal dust and common salt, all as shown in electrical plate No. 3 of MES SSR part-I and making test point as specified including excavation & earth work in any type of soil and connecting the earthing to an earthing point/equipment as specified and directed & testing on completion.

NOTES : (i) The concrete pit shall be made in PCC 1:3:6 type C-1, using 20mm graded crushed stone aggregate 40mm thick precast cover slab of RCC (1:2:4), type B-1, using 20mm graded crushed stone aggregate with suitable MS handle in lieu of CI cover. (ii) Item includes the cost of 7.5 metre GI pipe for protection of earth strip. Any variation in length shall be adjusted through deviation order (iii) Items includes cost of 7.5 metre earth lead strip. Any variation in length shall be adjusted through deviation order. (iv) Earth electrode shall be surrounded by adequate quantity of charcoal dust and salt to a packed thickness of 15 cm on all sides

Taking out old earthing material and M& L for new Earthing complete with copper plate electrode 600mmx600mmx3.15 mm thick buried directly in ground (earth pit not less than 2.25 RM deep below normal ground level) with top edge of the plate not less than 1.5 RM below normal ground level, connected to copper strip of 25x3 mm by means of bolts nuts, check nuts and washers of galvanised iron or steel all as shown in electric plate No 3, of SSR Part - I, 2009 & all as specified, testing on completion including provision of earth lead protected by 40 mm dia GI pipe medium grade & watering pipe 20 mm medium grade including all excavation and earth work in any type of soil, PCC earth pit with RCC cover, charcoal & salt, PGI funnel with wire mesh etc complete incl taking out old earthing and including making good disturbed surfaces of wall, floor.

Note : ( i ) The rate is inclusive of cost of earth lead and protection pipe upto 7.5 m. (ii) Irrespective of what is shown on plate No 3 of SSR Part-I /2009, the earthing pit shall be precasted PCC (1:3:6) type C1 using 20 mm crushed stone aggregate and the cover of earthing pit shall be of precast RCC (1 :2 : 4) type B-1 using 20 mm stone aggregate, reinforced with 6 mm dia round bars @ 75 mm C/C both ways with MS handle 12 mm dia with suitable handle finished with surface all as specified. (iii) The rates quoted by the contractor is deemed to be inclusive of cost of MS sheet of size 300mmX 300mmX3mm size, fixed with necessary nuts and bolts on angle iron of size 40X40x5mm & length 600mm and grouted in the ground with PCC (1:3:6 using 20mm rushed stone aggregate of size 200mmX200mmX250mm including necessary earth work for marking the result. (iv) Soil conductivity will be chcked prior to proceeding for earthing so as to ascertain 2 ohm earth resistance with above specification.

Supply, fixing and testing bushing rod of brass both ends threaded including nut, check nut and washer LT side of transformer 11 KV / 433 volt indoor/out door capacity upto and including 160 KVA including taking out old bushing rod complete all as specified and directed by Engineer-in-Charge.

Supply, fixing and testing bushing rod of brass both ends threaded including nut, check nut and washer LT side of transformer 11 KV / 433 volt indoor/out door capacity above 160 KVA including taking out old bushing rod complete all as specified and directed by Engineer-in-Charge.

Supply and filling of transformer oil EHV as per IS 335 of 1993 Part II. Note :- (i) Oil shall be brought in the manufacture sealed contrainer (drum) and shall be kept in safe custody of Engineer-in-Charge. (ii) Contractor shall hand over the purchase voucher and manufacturer's test certificate to the engineer in charge. (iii) Di-electric strength shall not be less than 60 KV AT 2.5 MM GAP

Rewinding/Reinsulation of LT / HT coils of any size and type of transformer including cleaning the burnt out insulating materials, brazing and rewinding with appropriate turns and size of super enamelled DPC insulated copper winding wire of appropriate gauge including filling insulation paper etc all as specified in particular specifications. Note :- (i) Burnt coils find out respective item No 35 shall be handed over to the contractor by the Engineer-in-Charge through issue voucher for rewinding giving reference of transformer i.e. make Capacity, MES/SM number of transformer etc. (ii) Weight, number of turns, gauge, insulation of winding wire shall be as per OEM. ((iii) Work of rewinding work shall be carried out throught OEM or their authorised vendor only. (iv) Old winding copper wire shall be contractor property and necessary amount as per schedule of credit shall be deducted from the contractor due payment.

R.K.ASSOCIATES

Hindustan Power Corporation