SPL REPAIR TO 4MVA TRANSFORMER AT NAMS UNDER GE NAMS

Amount

Taking down defective transformer 4 mva capacity ( Area make) (approx weight 16 ton) from the platform after disconnecting all connections from transformer and removing from power house with the help of suitable T & P including safe lifting of transformers and safety of the persons which are involving in this job i.e. from 66 KV yard and transport the 4MVA transformer from power house to reputed repair workshop. In addition to above contractor will also be responsible for following without any extra cost : (a) Safe carriage of transformer and accessories, safe loading and unloading at MES site and workshop (b) The workshop for repair of transformer shall have prior experience of successful repair of 66 KV similar rating transformer any make. Contractor shall submit the documentary evidence in this regard for approval of workshop by the GE before taking down the transformer. (c) All charges on account of transportation, toll tax etc (d) Clearance from state/NHAI authorities in case same are required due to large size of transformer. (e) Accidental and other insurances during transportation (f) Safety of transformer and accessories during repair period at workshop (g) Any other requirement for loading Transporting the transformer shall be arranged by the contractor with no extra cost. (h) Contractor may visit the site before quoting rates.

Material and Labour for draining of Transformer oil, opening & inspection and removing of old / defective /measureable copper coil dismantling core lamination after disconnecting Star/Delta connection from OLTC and reassembling of core lamination carefully to its original position including cleaning of core laminations free from any dust or particles complete in all respect. NOTE:- (a) BOO will be detailed by the Accepting Officer for strip inspection of the transformer (after opening) and assessing the damage to various components, weighting of coils of three limbs of transformer, measuring site of the copper wire and quantity of transformer oil complete. Contractor shall intimate the same well in advance to GE so that BOO can be detailed by AO (b) Necessary arrangement for inspection of transformer by BOO (c) Draining out of used oil scheduled in the quoted rates. Oil drums and T&P required is to be arranged by the contractor without any extra cost

Material and labour for replacement of primary winding (HV side) and secondary winding (LV side) of all defective limbs with new copper wound coils by using Paper covered in four layer with Japansee of 2.5 Mil paper as per transformer manufacturer specification suitable for 4 MVA (Areva) with necessary insulation, including varnishing, supply & fixing of high tension (HT) material superior quality as per transformer manufacturer specification for separating the HV to LV, LV to core winding of transformer coils for all three phases and drying of rewound three limbs etc complete all as specified and directed. NOTE : (i) Engineer in charge will visit the workshop during the rewinding for checking of copper wire used for rewinding and weighting of each coil and checking of quality of insulation paper used. Make for copper wire: - Hindalco, Hindustan Copper Ltd. (ii) Old material will be the property of the Contractor under relevant item of Schedule of Credit (iii) Make of Copper wire :- Manufactured out of Rod drawn/manufactured by Hindalco, Hindustan Copper Ltd. /BALCO

Supply and pouring in replacement of transformer oil with di- electric strength 60 KV conforming to IS-335/1993 with naphthenic base suitable for 4 MVA transformer 66/11 KV complete all as specified and directed. Note (i) Before pouring of Transformer oil in the transformer, Di-electric strength test & Dissolved Gas Analysis Test shall be got done from PSPCL Lab and original Test Report shall be submitted to AGE(E/M) & GE . Charges of the same shall be borne by the contractor.

M& L for Insulation material like spacer/parmali wood for Top and Bottom Ring manufactured from Senapathy Whitely (P) Ltd., fabricated by M/s Khedda Insulation Systems (P) Ltd., Bhopal

Material and labour sundry items like nuts/bolts/washer brazing material for fabrication/brazing and associated work for connection of wire of 4 MVA transformer (Areva) capacity 66/11 KV Gasket sets complete by using superior quality gasket make Talbros Sealing Materials Pvt Ltd., Faridabad complete in all respect all as specified and as directed for top cover including HT/LT Bushing & OLTC for making leak proof

Dehydration/Filtration of Tfr Oil with high vacuum low temperature purification plant removal of wasted and moistures to improve the dielectric strength at the gap of 2.5 MIL all as specified :

Material and labour for drying of transformer body from inside including conservator to remove foreign particles, carbon deposits and re-assembling transformer 4 MVA capacity after rewinding of coils, pouring of transformer oils including any type of repairs T & P equipments for testing of transformers, main tank and conservator tank, consumable items, required during installation of transformers, testing of earthlings, of buchhalz relay, bushing CTs, WTI & OTI and to make transformer in serviceable condition complete in all respect and making transformer ready for testing of 66/11kv in the presence of BOO for performing all routine tests to checking all the parameters as per IS:2026 in workshop completely shall be deemed to be included in quoted rate.

Supplying, laying, jointing & testing 2.5 Sqmm 4 core PVC insulated, armoured electric cable with flexible stranded copper conductor, 1100 volts grade complete including taking down old unserviceable cable any type and size all as specified and directed.

Material & labour for filling fine river sand into the pit under the power transformer including spreading and levelling complete all as specified and directed.

Material and Labour Out door End temination kit of heats shrinkable suitable for 185 sqmm to 300 sqmm HT 3 core 11000 volts XLPE cable type complete all as specified and directed.

S&F in replacement heavy duty aluminium thimble of size 300 to 400 sqmm complete all as specified

S&F in replacement disc type porcelain brown insulator suitable for 4MVA Areva transformer including one galvanized mild steel spindle, two galvanised iron washers & one galvanised nut for working pressure 11000 volts grade.all as specified and directed by Engr-in charge

Material & labour for providing 20mm broken stone aggregate including spreading and levelling complete all as specified and directed.

M&L for testing and servicing of outdoor type 66 KV SF-6 breaker including charging with approved SF – 6 gas and repair/replacement of mechanical system viz shaft/gear etc at 66 KV Grid Sub Station complete all as specified and directed by Engineer-in-charge

M&L for inspecting repair, testing and commissioning of all C&R panel relay complete all as specified and directed by Engineer-in-Charge including the following :- (a) IDMT Relay (b) Master Trip Relay (c) Differential Relay (d) All other miscellaneous relays including checking of all wiring circuit Note Tripping Mechanism as per transformer protection requirement shall be got done from Power Grid Corporation/PSPCL, before energizing the transformer

Replacement of Transformer breather as per existing size and capacity including filling of silica gel suitable for 4 MVA power transformer Areva make complete all as specified and directed by Engineer-in-charge

Repair/overhauling/servicing of OLTC make (a) Draining out Transformer oil from OLTC assembly complete by draining of dirty transformer oil & cleaning by flushining out with fresh Transformer oil or opening of Top cover after disconnecting tripping coil Buchhloz Relay, control Panel & repair/replacement of following parts (i) Energy Accumulator Assembly – 1 no (ii) Bearing plate Assembly – 1 (iii) Time delay Relay – 1no (iv) TPI switch Assembly – 1 no (v) Pressure Release Valve – 1 No

Supply and fixing for earthing complete with copper earth plate electrode 600x600 x 3.15mm thick burried directly in ground( earth pit not less than 3.00 mtr deep below ground level) with top edge of earth plate not less than 2.0 mtr below normal ground level ,connected to copper strip of size 32X6mm as earthing lead by means of nuts and bolts check nuts and washers of copper/brass all as shown on electrical plate No -3 of SSR 2009- Part 1 connected to earthing test point all as specified or indicated including testing on completion. The quoted unit rate shall include the following elements as given below :- (a) Copper earth electrode as mentioned above (b) Main earthing lead of 32X6 mm copper strip from earth electrode to test point up to 7.5 mtrs. (c) Connecting earthing lead and electrode all as specified and testing complete. (d) Adequate quantity of charcoal and salt. (e) GI protection pipe of 40 mm dia light grade of length not more than 5.00 mtrs. (f) Necessary excavation, earth work and PCC pit , angle iron 40x40x6mm frame including RCC cover.

Material & labour mild steel TMT bars 10mm dia and over, cut to length, bent to shape required including, cranking, bending spirally for hooping for columns, hooking ends and binding with and including mild steel wire (annealed) not less that 0.9mm dia or securing with clips complete all as specified.

Material & labour for mild steel cross arms, bracing, supports, clamps and back plate, fabricated from structural steel section including nuts, bolts and washers, welding, bending cold or hot drilling holes for bolts in any shape or size as indicated or directed and inclusive of two coats of aluminium paint over a coat of red oxide primer complete all as specified and directed.

Material & labour for providing precast cement concrete 1:2:4, type B-1, using 20 mm graded aggregate in landings, cover slabs (for man holes etc) chajjas, water trouhghs, shelves and similar articles including form work complete all as specified and directed.

Material & labour for preparing old painted surface of transformer by cleaning removing the old paint by scratching with wire brush etc and applying with spray machine two coats of synthetic enamel paint of grey colour on external surfaces of the transformer and writing of letter HT/LT or HV/LV and SM/MES nos complete all as specified and directed Note : (i) The compressor / spray machine and other required necessary equipments shall be arranged by the contractor and quoted rates shall be inclusive of this aspect.

Material & Labour for applying zinc chromate/insulation inside the body

Material & Labour for testing and commissioning of HT/LT bushing including bushing CTs at 66/11 KV Grid sub station complete all as specified and directed by Engineer-in-Charge

Material & labour, testing and commissoning for replacement of Buchhloz Relay as per existing model complete as per specification

Material & labour for replacement of Winding Temperature Indicator make complete as per specification

Material & labour for replacement of Oil Temperature Indicator make complete as per specification

Demolition of wall of approx. 10 meter length, 2 metre high and reconstruction with brick(used/new) in CM 1:6 and plastering 15mm thick fair finish both side in CM 1:4 and periodical services as per existing complete all as specified. Note : Contractor may visit the site to ascertain the quantum of work before quoting the rates of the job.

Supplying, laying, jointing & testing 2.5 Sqmm 6 core PVC insulated, armoured electric cable with flexible stranded copper conductor, 1100 volts grade complete including taking down old unserviceable cable any type and size all as specified and directed.

Material and labour for transportation the 4 MVA transformer (Areva) from workshop to 66 KV Substation, NAMS Amritsar. During the transportation, Contractor will be solely responsible for safe bringing back of this transformer without any damaging to the body of power transformer etc by using suitable heavy vehicle, loading at workshop and unloading on the platform of 66 kv substation and connecting 66 KV, 11 KV and other control and instrumentation connections as per standard practice complete all as specified and directed by Engineer -in-charge NOTE:- (a) All the precommissioning tests as per IS:2026 has to be carried out at power house by State Electricity Board protection Department (PSPCL) and commissioning of transformer by the SEI in terms of IS:2026. Contractor shall make the necessary arrangements for the same. (b) All the charges on account of testing of by state electricity board (PSPCL) and commissioning by SEI in presence of Engineer-in-Charge are deemed to be included in the quoted rates all as specified (c) During transportation accidental insurance shall be deemed to be covered from workshop to MES power house (d) Completion will be issued after testing of transformer in presence of SEI

Shree Balaji Construction