REPLACEMENT OF 33 KV/ 11 KV HT PANELS, UNSERVICEABLE RELAY PANELS, UNSERVICEABLE CT AND PT METER AND SUBSTATION YARD AT DRONACHAL UNDER GE DRONACHAL

Amount

Disconnecting and dismantling indoor type 11 KV CTs carefully at site and supplying Installing, testing and commissioning 11 kV current transformer indoor type, epoxy resin, cast dry type all as per IS 16227 for outgoing feeder, ratio 60/30 /5-5 Amp 15 VA, Class-1 for metering 5P 20 for protection including PI, IR testing with removing of existing CTs complete all as specified and directed.

Disconnecting and dismantling indoor type 11 KV CTs carefully at site and supplying Installing, testing and commissioning 11 kV current transformer indoor type, epoxy resin, cast dry type as per IS 16227 for Incoming feeder, ratio 120/60/5-5 Amp 15 VA ,Class-1 for metering 5P 20 for Protection including PI ,IR testing with removing of existing CTs complete all as specified and directed..

Supplying Installing, testing, and commissioning in repairs as per the existing multi-function meter for 15 VA ,5 Amp CT secondary and 11 kV/ 110 V PT Sec. with 230/110 AC or 24 Volt DC auxiliary supply, digital voltmeter, ammeter for incomer complete all as specified and directed.

Supplying Installing, testing, and commissioning 11 kV HRC PT fuse 3.15 Amp conforming to IS 3156 rating 11 kV/110 volt of suitable size as per existing PT set complete all as specified and directed.

Supplying, installing, testing, and commissioning microprocessor based digital O/C, E/F Relay with IDMT (Inverse Definite Minimum Time) &Instantaneous element for 3 Phase 33 kV system complete all as specified and directed.

Supplying, installing, testing and commissioning multi-function meter for 15 VA ,5 Amp CT secondary and 33 kV /110 V PT Sec. with 230/110 AC or 24 Volt DC auxiliary supply complete all as specified and directed.

Supplying, installing, testing and commissioning auxiliary relay 2 No contact, 2 element 24 volt DC auxiliary supply complete all as specified and directed.

Supplying, installing, testing and commissioning lock out relay 3 NO 3 NC contact 24 volt auxiliary supply for 33 KV VCB panel complete all as specified and directed.

Disconnecting and dismantling outdoor type CTs carefully at site and supplying, installing, testing and commissioning 33 kV current transformers outdoor type, epoxy resin, cast dry type all as per IS 16227 for outgoing feeder ratio 40/20/5-5 Amp 15 VA, Class-1 for metering 5P 15 for protection including PI, IR testing complete all as specified and directed.

Dismantling danger notice plate any type and size and setting aside for re-use or removing to store or for schedule of credit

M & L for danger notice plate of 1.6 mm thick mild steel sheet, vitreous enamelled white, with letters, figures and conventional skull and bones in signal red colour and fixed with mild steel clamps, bolts and nuts of approved size, for HT, 250 mm X 200 mm complete all as specified and as directed.

Dismantling insulators any type, any size complete all as specified and as directed.

S & F porcelain pin insulator, Type B, Nominal System voltage 11 kV, highest system voltage 12 kV, visible discharge test voltage 9 kV, wet power frequency withstand voltage 35 kV, power frequency puncture withheld voltage 105 kV, impulse withstand voltage 75 kV, minimum total creepage distance 230 mm, minimum failing load 5 kN, of suitable size with galvanised steel insulator pin, nut, washers complete all as specified and as directed.

S & F porcelain disc insulator, ball and socket type, Type B, Nominal System voltage 11 kV, highest system voltage 12 kV, visible discharge test voltage 9 kV, wet power frequency withstand voltage 35 kV, impulse withstand voltage 75 kV, minimum total creepage distance 230 mm, minimum failing load 70 kN, of suitable size with galvanised steel stud pin, nut, washers complete all as specified and as directed.

M & L for maintenance of 33 KV(yard) power grid bus bar structure at MRS 33/11 KV Dronachal with, scratching out old bubbled paint, finishing the surface one coat of primer (red oxide) & two coats of aluminium paint of 1st quality to steel tubular poles/PCC pole/MS Channels - 15 Nos and including accordingly cross arms, bracings, clamps 9/11/13 metre long all as per site including three strips of 30 cm wide to be painted red synthetic enamel above embedded level all as specified and as directed.

Disconnecting and dismantling outdoor type 33 kV PTs carefully at site and supplying Installing, testing and commissioning 33 kV /110 Volts outdoor type PT as per IS 16227 including electrical connection, testing and PG clamp complete all as specified and directed

Inspection/Servicing to HT VCB 33 KV outdoor type to make with full functionality by doing following jobs including testing and commissioning to the entire satisfaction of Engineer-in-charge. (a) Cleaning the external surface of bushing with CTC or liquid ammonia to remove the accumulation of dirt or any other deposits. Inspection of bushings and make sure that vibration due to break operation have not caused the bushings to move resulting misalignment of contacts. (b) Checking the vacuum interrupter assembly and contact Checking the alignment of contacts and setting the contact surfaces to bare firm and uniform pressure and adjust the gap as per manufacture tolerance. Badly potted contact needs to be replaced. (c) Checking of operating voltage watt mechanism terminals tripping arrangement for positive tripping. Contacts to be examined for their condition and operation. Dress the pitted contacts. (d) Inspecting all bolts, nuts pins and collar pins for tight and opened properly (e) Inspection cleaning and relubrication of circuit breaker

Inspection/Servicing of the HT Vacuum circuit breaker of capacity 800 Amps, 11 kV indoor by doing following jobs including testing and commissioning to the entire satisfaction of Engineer-in-charge. (a) Dismantling the VCB from the enclosure consisting of vacuum interrupter assembly, socket contacts, checking the serviceability of the parts carefully including cleaning, adjustments and re-assembling the complete. (b) Cleaning the external surface of bushing with CTC or liquid ammonia to remove the accumulation of dirt or any other deposits. Inspection of bushings and make sure that vibration due to brake operation have not caused the bushings to move resulting misalignment of contacts. (c) Checking the vacuum interrupter assembly and contact checking the alignment of contacts and setting the contact surfaces to bare firm and uniform pressure and adjust the gap as per manufacture tolerance. Badly potted contact needs to be replaced. (d) Checking the breaker bushing of bus bar and circuit side inspecting the interval surface carefully for any charging/tracking. (e) Dismantling the spring Charging mechanism of VCB, checking the operations of closing/tripping through closing/tripping coils electrically as well as manual charging including cleaning adjustments and re-assembling complete for the following (f) Checking the ratchet wheel assembly, driving and charging parts etc. (g) Checking the operation mechanism of breaker and ensure its operation freely through lentyire stroke. Parts which shows excessive wear and tear to be replaced or adjusted as per manufactures tolerance. (h) Checking of operating voltage watt mechanism terminals tripping arrangement for positive tripping. Contacts to be examined for their condition and operation. Dress the pitted contacts. (j) Review the adjustment of all pressure switched land lockout devices. (k) Inspecting all bolts, nuts pins and collar pins for tight and opened properly (l) Note cost of additional hardware like bolts, nuts, washers and springs, washers, petroleum jelly etc, to put the breaker in serviceable condition is deemed to be included in the rated quoted. (m) Inspection cleaning and relubrication of circuit breaker

Supplying and installing of spring charging assembly of 33 kV outdoor VCB including dismantling defective charging assembly complete all as directed by Engr-in-charge Make : ABB

Supplying and installing auxiliary switch of VCB 33 kV outdoor including taking down unserviceable switch Make: ABB

S & F in repairs bush as per the existing complete all as specified and as directed.

S & F in repairs indicator as per the existing complete all as specified and as directed.

S & F in repairs trip magnet coil as per the existing complete all as specified and as directed. Trip magnet coil

S & F in repairs closing transmission lever bush as per the existing complete all as specified and as directed.

S & F in repairs spacer as per the existing complete all as specified and as directed.

S & F in repairs cam as per the existing complete all as specified and as directed.

S & F in repairs micro switch as per the existing complete all as specified and as directed.

S & F in repairs parallel dowel as per the existing complete all as specified and as directed.

S & F in repairs micro switch arm as per the existing complete all as specified and as directed.

S & F in repairs tension spring as per the existing complete all as specified and as directed.

S & F in repairs torsion spring as per the existing complete all as specified and as directed.

S & F in repairs PG Clamp suitable for 33/11 KV as per the existing complete all as specified and as directed.

Supplying, installing, testing and commissioning of 2 X 12 Volt DC 150 AH, battery maintenance free suitable capacity in 2 X 12 V) for panel controls complete all as specified and as directed.

Supplying, installing, testing and commissioning of 24 Volt DC 150 AH, battery backup of suitable capacity for 2 X 12 Volts maintenance free battery for panel controls with suitable charger boost /float mode, Auto/ manual input 230 Volt AC output 24 volt DC complete all as specified and as directed.

Supplying and fixing in replacement of damage copper busbar PVC shrinkable sleeving with RYB colours and insulator conforming of busbar healthiness, for 6 Nos. 11 kV VCB Panel complete all as specified and as directed.

Supply installation testing and commissioning in repair as per existing 33/11 kV panel TNC switch, indication lamp (ON, OFF, spring charge, trip ckt healthy, trip r y b for incomer & outgoing feeders) Emergency stop button with required control wire lugs ferrule complete all as specified and as directed.

S & F voltmeter reading display complete all as specified and as directed

S & F Ampere meter display complete all as specified and as directed

S & F hot rolled low tensile structural steel of grade E165 as per IS 15911: 2010 as in hand rails, half round or other steel section or core for wooden hand-rail straight portion, drilled and countersunk for balusters running bars, for doors, balusters, nosing to steps including embedding in concrete and screwing etc. wind ties for roof including securing bolts; posts and struts in fencing including cutting tops to shape as directed, drilling holes, notching for wire, etc.; flat iron fillets (for securing wire mesh etc.) including all necessary drilling, bolting or riveting, etc., and similar works complete all as specified and as directed.

Supply only 10 mm dia mild steel Gde E-250 plain round bars as in line wire for chain link fencing complete all as specified and as directed.

S & F mild steel bolts, diameter of neck not exceeding 12 mm, purpose made with hexagonal or square head one end and screwed the other, or screwed both ends; each screwed end to be fitted with washers and one hexagonal or square not exceeding 30 cm long complete all as specified and as directed.

Fixing only galvanized steel chain link fence fencing including line wires any mesh, size and type to any type of standards, rails, straining bolts, etc. including provn of binding wire complete all as specified and as directed.

Supply only galvanized steel chain link fence fabric of mesh size 50 mm X 50 mm, made out of 2.50 mm nominal dia of mesh wire.

Preparation of newly or previously untreated steel surface of any description over 10 cm width or girth and applying two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer complete all as specified and as directed by Engineer-in-Charge

Preparation of newly or previously untreated steel surface of any description not exceeding 10 cm width or girth and applying two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer complete all as specified and as directed by Engineer-in-Charge

S & F hot rolled medium and high tensile structural steel of grade E165 as per IS 15911: 2010 as in framed work such as grills, grating, etc., with ends of bars of shouldered and/or riveted, or forged into spikes, framed guard bars; barred iron doors; ladders; framed balusters; walk ways; railings; framework water tanks and similar work hung as gates, including pintle hinges, stops, hand made sliding bolts etc. complete all as specified and as directed.

M & L for cement concrete in foundation, filling and mass concrete in M10(Nominal Mix) using 40 mm nominal size graded crushed stone aggregate complete all as specified and as directed.

Disconnecting the transformer of capacity 2 mVA, 33 kV /11 kV outdoor from HT side carefully at site, dismantling carefully and removing primary and secondary terminals, top cover, conservator tank, neutral earth strips and draining out transformer oil to the required level and storing carefully in cleaned containers, (to be arranged by contractor) etc. for cleaning of terminals, replacement of defective parts such as replacement of 5 mm thick rubberised cork sheet gasket for tank top cover, replacement of worn out/burnt out studs, checking and cleaning of contacts of tap changer and re-assembling the transformer after replacing the defective parts/repair reassembling the complete dismantling items, reconnecting the HT supply cable ends at the site complete all as specified and as directed. Note: - (a) Transformer oil shall be drained out by the contractor in suitable capacity mild steel drums to be arranged by the contractor. The said drained out transformer oil shall be refilled in the transformer duly dehydrated after repair and the cost thereof shall be included in unit rate quoted against the respective item of this schedule and paid separately. (b) The spare parts excluding nuts, bolts, washer, gasket etc. shall be measured and paid for separately. (c) Testing of transformer after repair shall be carried out as per IS 2026 (Part 1): 2011 and the cost of testing shall be deemed to be included in unit rate quoted against this item.

Opening of transformer of capacity 100 kVA, 33 kV /0.433 volts, outdoor type of any make after unscrewing nuts & bolts, screws and connected, dismantling carefully connected accessories and removing primary and secondary terminals, top cover, conservator tank, temp gauge, breather, neutral earth strips and draining out transformer oil to the required level and storing carefully in cleaned containers (to be arranged by contractor) etc. for replacement of defective parts such as replacement of leaking gaskets, replacement of worn out/burnt out studs, checking and cleaning of contacts of tap changer and re-assembling the transformer after replacing the defective parts complete all as specified and as directed. Note: - (a) Transformer oil shall be drained out by the contractor in suitable capacity mild steel drums to be arranged by the contractor. The said drained out transformer oil shall be refilled in the transformer duly dehydrated after repair and the cost thereof shall be included in unit rate quoted against the respective item of this schedule and paid separately. (b) The spare parts excluding nuts, bolts, washer, gasket etc. shall be measured and paid for separately. (c) Testing of transformer after repair shall be carried out as per IS 2026 (Part 1): 2011 and the cost of testing shall be deemed to be included in unit rate quoted against this item.

S & F in repairs 36 kV/ 250 A bushing with copper stem including both porcelain parts and metal parts with accessories as per IS 3347 Part 5 (section 1 & 2) complete all as specified and as directed.

S & F in repairs 12 kV or 17.5 kV/ 250 A bushing with copper stem including both porcelain parts and metal parts with accessories as per IS 3347 Part 3 (section 1 & 2) complete all as specified and as directed.

S & F in repairs upto and including 1.1 kV/ 250 A bushing with copper stem including both porcelain parts and metal parts with accessories as per IS 3347 Part 1 (section 1 & 2) complete all as specified and as directed.

Dehydration and filtration of existing transformer oil of transformer at different location with filtration machine and heating system to get the minimum di-electric strength of oil 40 kV minimum without disturbing the power supply system and refilling/ topping up /replacement of unserviceable transformer oil complete all as specified and as directed.( Note: Transformer oil required extra for filling/topping up shall be measured and paid separately under the relevant items of this schedule).

Supply, filling and topping up new transformer oil of dielectric strength not be less than 60 kV and conforming to IS 335: 1993 complete all as specified and as directed.

S & F in repairs silica gel breather including silica gel, indicating type, 4 to 6 mm standard size of the particle, blue colour for transformer of capacity upto and including 500 kVA complete all as specified and as directed.

S & F in repairs silica gel breather including silica gel, indicating type, 4 to 6 mm standard size of the particle, blue colour for transformer of capacity exceeding 500 kVA and upto and including 1000 kVA complete all as specified and as directed.

M & L for spray painting of transformers (any type power or distribution)) of capacity upto and including 250 kVA ( in situ ) outdoor type, installed and located at different sites in scattered area under the GE including the following: - (a) preparation of old surfaces by cleaning, scrapping, rubbing/ polishing etc. complete. (b) Spray painting with two coats of synthetic enamel paint of approved make / quality all as directed at site. (c) Writing the SM MES No of transformer on MS body of transformer all as directed .

M & L for spray painting of transformers (any type power or distribution)) of capacity above 1500 kVA and upto and including 2000 kVA ( in situ ) outdoor type, installed and located at different sites in scattered area under the GE including the following: - (a) preparation of old surfaces by cleaning, scrapping, rubbing/ polishing etc. complete. (b) Spray painting with two coats of synthetic enamel paint of approved make / quality all as directed at site. (c) Writing the SM MES No of transformer on MS body of transformer all as directed .

M & L for calibration of indoor VCB 11 KV 800 Amps 26.3 kA of ABB make along with primary current injection test of 11 KV current Transformers (CTs) & Potential Transformer (PTs) and checking the electrical circuit for fault condition and proper functioning for testing of L&T relay MC61AnX at MRS 33/11 KV Dronachal powerhouse including calibration of relay indoor control panel complete all as specified and as directed.

M & L for calibration of outdoor VCB 33 KV 630 Amps of ABB make along with primary current injection test of 33 KV current Transformers (CTs) & Potential Transformer (PTs) and checking the electrical circuit for fault condition and proper functioning for testing of L&T relay MC61AnX at MRS 33/11 KV Dronachal powerhouse including calibration of relay indoor control panel complete all as specified and as directed.

S & F in repairs 50 mm dia gunmetal drain valve of transformer as per existing one along with brass/ gun metal dummy cap complete all as specified and as directed.

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ELITE WORKS