REPAIR MAINT AND FILTRATION OF ISOLATING TRANSFORMER SERVO STABILIZER AND ALLIED WORK UNDER AGE EM II OF GE 865 EWS AT LEH

Amount

Disconnecting and removing LT Cables and other connections and Strip opening of Servo stabilizers of 75 up to 750 KVA, 433 volts indoor/outdoor type of any make after unsecrewing nuts/bolts screws and connected accessories such as breather,temperature gauge for replacement of defective LT coils,replacement of drain valve, paper insulation strip, electronic cards of each phase (RYB) etc and other defective parts i.e. servo motor, Out /In terminals. (payment of defective replaced parts shall be measured and paid seperately. Re-assembling after replacing the defective coils parts and replacing the top gasket sheet and other insulating, packing materials and testing complete all as specified and directed. Note :- The reassembling element covers the assembling of parts not to be changed where as for the rest it shall be the part of the item being replaced.

M&L labour for alternative arrangement by hiring, transportation of Isolation transformer of capacity 40 KVA in place of unserviceable copper wound from transformer opening top cover, and carrying out the following work complete all as specified and directed :- (a) Dismantling of all attachment LT bushing minor repairs etc. as required and directed and keeping aside for reuse. (b) Taking out the core with winding assembly. (c) Removing of complete winding from core and dismantling the core, cleaning of core laminate sheet and keeping aside for reuse (d) Cleaning of complete transformer tank oil fins, removing of sludge, and making the inside surface of tank dry by blowing of hot air as directed and specified. (e) Painting of outside surfaces of transformer complete by means of spray machine as directed. (f) Rewinding of LT leg coil complete using copper wire /strip of appropriate gauge, size and turn as per existing with double paper coated insulation including all requisite insulating materials like packing sleeves, separator, tapes etc. heating, varnishing the core and winding assembly after framing up top and bottom steel structure of transformer all as specified and directed. (g) Replacement of all insulating materials other than incorporated for rewinding of LT coils as per existing.

(h) Fixing only LT procelain bushing with studs, nuts, washers 3 Nos. and LT procelain bushing with studs, nuts, and washers 4 Nos. and connection with primary and secondary windings and reconnecting with the main terminals as required and directed. (j) Replacement of all unserviceable gasket from top cover, LT bushing with new one by using rubberised gasket sheet 4.0mm/6.0mm thick duly pasted with suitable adhesive .

M & L for replacement of servo synchronous motor of existing model and capacity incl. testing and commissioning after repair complete all as specified and directed.

M & L for replacement of Variable Auto Transformer suitable for 75 to 750 KVA servo Voltage Stabulizer working pressure of copper winding with suitable guage of wire of existing model and capacity incl. testing and commissioning after repair complete all as specified and directed.

M & L for Electronic Control Card ( in replacement) for Automatic Voltage regulation as per existing make complete all as specified and directed by Engr-in-Charge.

M & L for Circuit plate of capacity 30 KVA-400 KVA (in replacement) for voltage stablizer of any capacity and size as per existing make complete all as specified and directed by Engr-in-Charge.

M&L or rewiding of LT coils of transformer/Servo stabilizer of capacity 400 KVA to 1000 KVA with super enamelled copper winding wire of appropriate gauge and proper number of turns alongwith insulating material eg leatheroid, paper insulation, cotton tapes, Empire tapes, wooden block packings, PVC sleeves, soldering and varnishing with insulating varnish, heating/drying etc complete all as specified and directed by Engr-in-Charge.

Dehydration of EHV grade transformer oil minimum three cycles to achieve dielectric strength not less than 50 KV for 1 minute with 2.5mm Gap as per IS - 335 - 1983 for EHV grade including topping up with new transformer oil all as directed. Note :- (i) Centrifuging Machine with all T&P & testing machine of oil, required for dehydration shall be arranged by contractor. (ii) Oil required for topping up the transformer will be measured & paid separately.

Supply and fill up transformer oil as in topping up/ refilling of transformer having dielectric strength not less than 55 KV at 2.5 mm gap conforming to IS incl testing complete. all as specified and directed.

Supply and fixing of HV/LV bushing with brass metal connecting rod, nut, bolt and washer suitable for transformer 100 KVA to 100 KVA, 12 KV as per IS, replacement of worn out stud complete all as specified and directed.

Supply and fixing in replacement of Silica gel breather assembly complete with silica gel crystal complete for the capcity of transformer 100 KVA to 1000 KVA all as specified and directed.

Supply and fixing in replacement of Tinned copper flexible wire 60 to 200 Amps for HT fuse complete. all as specified and directed.

Material and labour for servicing of battery charger system installed at Main power house for 12 Nos 2 volt battery each (12 Nos x 2 volts = 24 volts) used for proper funcitoning of relays.Removing all electrical and control coneection and up to existing socket for charging and DC Supply to existing VCBs up to 12 Nos and the connection of incoming and outgoing battery bank to VCBs will be made including replacement of supply and fixing of 4 nos 24 volt battery by stranded copper conductor size not less than 2.5 sqmm for each core in case of multi core cable or single core cable PVC inculated unsheathed cable duly drean into medium grade PVC condult on floor/wall making proper functional and as directed by Engr - in - charge.

Taking out defective multifuctional protection relay from 11 KV VCB Panels and supply and fix of REF 615 digital multi functional protecton relay with consits overcurrent, dir earth fault, combined protection, In sync for close, Frequency protection, beaker failure, Disturd rec triggered, CB conditon moniterring and supervsion of all data. all as specified and directed.

Material and labour for Cable joining kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with joining material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm 3 core with working voltage 11000 volts complete all as specified and direced by Engr - in- Charge.

Material and labour for Cable joining kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with joining material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm 3 core with working voltage 11000 volts complete all as specified and direced by Engr - in- Charge.

Supply and fixing in replacement jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint kit complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm . all as specified and directed.

Supply and fixing in replacement jointing kit for 11 KV (Earthed) grade cable for outdoor end termination heat shrink type joint kit complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm all as specified and directed.

Disconnecting and taking out worn out jumpers/connectors of HT over head line / DO fuse unit in substations of any size or any length after removing binding wire / connector and replacement with the new ACSR weasel conductor jumpers including PVC sleeve in colour coding R/Y/B of same size and length approx 1.5mtr including new binding wire/ connectors suitable for AB switch/DO fuse unit, including provision of conducting jelly all as specified & directed by Engr-In-charge.

Repairing and servicing (Oiling and greasing) of Gang Operated Switch 11 KV vertical/Horizontal mounted and replacing defective parts including replacement of unserviceable spare parts as required for smooth functioning of AB switch, testing for its proper operation, all as directed at site.

Dismantling UNSV air break gang operated and Supply, installation connecting electrically & commissioning switch air break, gang operated, tripple pole mounted on Polymer insulators 15 Nos and steel frame with operating mechanism with 20 mm dia GI Pipe (Medium Grade) Rod worked from ground level, drop out fuse, for current rating upto 200 amps and working voltage 11000 volts all as required at site or directed by Engr-in-charge.

Supply & fixing in replacement lightning arrestor suitable for 11 KV grade, thyrester type, complete with all fitting transmission class for outdoor discharge capacity 65 KA complete. all as specified and directed.

Material and labour for painting of Transformers outer body of capacity 100 to 400 KVA including cleaning / preparing the old painted surface before spray paint of existing colour of transformer all as specified and directed.

Material and labour for painting of Transformers outer body of capacity 500 to 1000 KVA including cleaning / preparing the old painted surface before spray paint of existing colour of transformer all as specified and directed.

Material and labour for danger notice plate for HT of size 25 cm x 20 cm x 1.5 mm thick mild steel sheet, synthetic enamelled white with letters, figures and conventional skull and bones in signal red colour and fixed with MS clamps, bolts and nuts complete all as specified.

Disconnecting and Taking out old HT/LT armored XLPE cables from trenches of any size/core/any voltage grade from trenches/poles /pipes, for replacement all as directed by Engr in charge

XLPE insulated, armoured heavy duty electric cable with aluminium conductor, 1100 volts grade, cross sectional area 25 Sqmm 4 core laid in trenches passing through pipe/ ducts/ surface of wall ceiling etc including testing after laying complete all as specified.

XLPE insulated, armoured heavy duty electric cable with aluminium conductor, 1100 volts grade, cross sectional area 10 Sqmm 4 core laid in trenches passing through pipe/ ducts/ surface of wall ceiling etc including testing after laying complete all as specified.

XLPE insulated, armoured heavy duty electric cable with aluminium conductor, 1100 volts grade, cross sectional area 16 Sqmm 2 core laid in trenches passing through pipe/ ducts/ surface of wall ceiling etc including testing after laying complete all as specified.

Excavation in trenches n.exc 1.5 metres wide and n.exc 1.5 metres deep and getting out in any type of soil, all as specified.

Returning filling in including spreading leveling, watering and well ramming in layers n. exc 25cm, all as specified.

Removal of excavated material to be distance n.exc 50M and depositing where directed at a level n.exc 1.5m high from the starting point, all as specified.

Sand cushioning to under ground cables, 8 cm thick layer before laying and testing the cable and 15 cm thick after laying and directed by Engr-in-Charge. Note:- Punned thickness of 18 CM will be measured and paid.

Supply and laying unreinforced pre cast concrete cable cover class LV type I flat size 250x150x40mm all as specified and directed.

Straight through joint kit, heat shrinkable type suitable for 70 sqmm LT UG Cable complete all as specified and directed by Engr-in-Charge.

Straight through joint kit, heat shrinkable type suitable for 95 sqmm LT UG Cable complete all as specified and directed by Engr-in-Charge.

Surface cleaning by removing the roots completely from the earth, shrubs, vegetation, grass, bushes, weeds by excavation not exceeding 30cm and averaging 15cm deep including sweeping removing the same to distance not exceeding 50m away from the installation and burning the same all as specified and directed by Engr-in-Charge.

Taking out the unservicable insulation from existing pipe of size 50mm bore of pipe and providing for Insulation of MS Pipe with PUF slab 30 mm thick and applying bituminuous compound and GI cladding with 26 gauge GI sheet complete including complete earthwork for clearance around the pipe compete all as specifid and as directed.

Taking out the unservicable insulation from existing pipe of size 40mm bore of pipe and providing for Insulation of MS Pipe with PUF slab 30 mm thick and applying bituminuous compound and GI cladding with 26 gauge GI sheet complete including complete earthwork for clearance around the pipe compete all as specifid and as directed.

Taking out the unservicable insulation from existing pipe of size 32mm bore of pipe and providing for Insulation of MS Pipe with PUF slab 30 mm thick and applying bituminuous compound and GI cladding with 26 gauge GI sheet complete including complete earthwork for clearance around the pipe compete all as specifid and as directed.

Taking out the unservicable insulation from existing pipe of size 25mm bore of pipe and providing for Insulation of MS Pipe with PUF slab 30 mm thick and applying bituminuous compound and GI cladding with 26 gauge GI sheet complete including complete earthwork for clearance around the pipe compete all as specifid and as directed.

Taking out the unservicable insulation from existing pipe of size 20mm bore of pipe and providing for Insulation of MS Pipe with PUF slab 30 mm thick and applying bituminuous compound and GI cladding with 26 gauge GI sheet complete including complete earthwork for clearance around the pipe compete all as specifid and as directed.

Supply & laying or fixing 1100 volts grade duty cable with PVC insulated aluminium conductor served with an inner sheathing of PVC tape overall PVC sheathed Stranded conductor in service connections 6 Sqmm twin core flat/circular cable complete all as specified and directed.

Supply & laying or fixing 1100 volts grade duty cable with PVC insulated aluminium conductor served with an inner sheathing of PVC tape overall PVC sheathed Stranded conductor in service connections 16 Sqmm twin core flat/circular cable complete all as specified and directed.

S&F GI tubing 50mm dia "light grade" with all fittings, laid in trenches, fixed on pole/under road crossing or passing through gutters etc, complete all as directed.

Schedule of Credit

M/S SHEYSHAN ENTERPRISES (BID ID -3161300)

M/S SONAM angchok (BID ID -3164230)

M/S NANCY ENTERPRISES (BID ID -3163376)

M/S SONAM NAMGIAL (BID ID -3163388)

Takshos Enterprises (BID ID -3163206)

TSEWANG DORJAY (BID ID -3163411)

CHHIRPON BUILDERS (BID ID -3163202)