REPAIR AND REFURBISHMENT OF EXTERNAL ELECTRIFICATION MAIN SWITCH GEARS, PARTS OF TRANSFORMER, VCBs AND ALLIED SERVICES IN AIR FORCE AND ARMY AREA UNDER GE AVADI

Amount

Overhauling / servicing of HT, 11KV, 50Hz, oil circuit breaker, 400Amps, 250MVA capacity including thorough inspection of the OCB and carrying out the following maintenance works for proper and efficient functioning of OCB's all as specified and as directed. Make of OCB panel - Crompton Greaves. (i) Check, clean, align, adjust / tightening all terminals of fixed and moving contacts, apply petrolleum jelly to all surfaces of contacts, checking insulation resistance and set for proper functioning. (ii) Check transformer oil (insulating oil) of the complete OCB filter with filtration plant equipment and testing of oil. (iii) Check, clean, align, adjust / tightening all terminals of Earthing at OCB's and earth pits, carry out earth resistance test of all earth electrodes.

Overhauling / servicing of HT, 11KV, 50Hz, Vaccum circuit breaker, SF6, 400Amps, 250MVA capacity including thorough inspection of the VCB and carrying out the following maintenance works for proper and efficient functioning of VCB's all as specified and as directed. Make of VCB panel - Crompton Greaves. (i) Check, clean, align, adjust / tightening all terminals of fixed and moving contacts, apply petrolleum jelly to all surfaces of contacts, checking insulation resistance and set for proper functioning. (ii) Check, clean, align, adjust / tightening all terminals of trip coil, checking insulation resistance and set for proper functioning. (iii) Check, clean, align, adjust / tightening all terminals of potential transformer and current transformer, checking insulation resistance and set for proper functioning.

(iv) Check, clean, align, adjust / tightening all terminals of Internal wiring circuits of complete panel, replace unserviceable fuse, checking insulation resistance and set for proper functioning. (v) Check, clean, align, adjust / tightening all terminals of over load and earth fault relay units, conduct secondary injection test on each relay, set for proper function / activation for tripping the VCB whenever fault occurs. (vi) Check, clean, align, adjust / tighten all terminals of bus bars terminal connections check insulation resistance. (vii) Check, clean, align, adjust / tightening all terminals of Battery bank with battery charger and wiring connections to and from battery, check voltage, charging system etc., rectify defects if any and test for proper functioning. (viii) Check, clean, align, adjust / tightening all terminals of Earthing at VCB's and earth pits, carry out earth resistance test of all earth electrodes.

Note for Item No. 1 & 2: The entire overhauling / servicing works including replacement of unserviceable parts as described above of OCBs and VCBs shall be carried out through any authorised service dealer / centre of M/s Crompton Greaves and necessary test certificate for satisfactory function of the OCB and VCB/SF6 panels and system from the authorised service dealer / service centre shall be submitted in triplicate to the Engineer-in -charge before claiming the payment .

Dismantling the unserviceable indicator lamps from HT OCB / VCB panels and S & F new indicator lamps of existing type / model / capacity and connecting up and testing complete all as directed.

Dismantling the unserviceable digital ammeter, flush mounting type from HT OCB / VCB panel and S & F new digital type ammeter of existing type / model / capacity and connecting up and testing complete all as directed.

Dismantling the unserviceable digital voltmeter, flush mounting type from HT OCB / VCB panel and S & F new digital type volt meter of existing type / model / capacity and connecting up and testing complete all as directed.

Dismantling the unserviceable digital frequency meter, flush mounting type from HT OCB / VCB panel and S & F new digital type frequency meter of existing type / model / capacity and connecting up and testing complete all as directed.

Dismantling the unserviceable fuse unit from HT OCB / VCB panels and S & F new fuse unit of existing type / model / capacity and connecting up and testing complete all as directed.

Dismantling the unserviceable trip catch from 11KV VCB and S & F new trip catch and connect complete all as directed . Make : Crompton Greaves.

Dismantling the unserviceable rack in and rack out segment gear from 11KV VCB and S & F new test rack in rack out segment gear complete all as directed. Make : Crompton Greaves.

Dismantling the unserviceable big gear and small gear assembly from 11KV VCB and S & F new big gear and small gear assembly, connect and test complete all as directed. Make : Crompton Greaves.

Dismantling the unserviceable spring charging motor from 11KV VCB and S & F new spring charging motor, connect and test complete all as directed. Make : Crompton Greaves.

Taking down defective transformer upto 500 KVA capacity from pole / structures after disconnecting all electrical connection removing from sub station as directed., placing the repaired/stand by transformer in place of taken down defective transformer or refixing the same after repairs including transportation, loading and unloading of transformer from sub station to work site and connecting HV / LV side including all connecting and jointing materials such as suitable size of lugs, bolts, nuts etc., complete all as directed.

Opening / striping off transformer 11KV / 0.433 KV, step down type capacity from 63KVA to 500 KVA including draining off oil, lifting the core and coil assembly, washing and cleaning dust, dirt and sludge deposit etc., removing damaged / defective parts, making internal connection servicing of tap changer and reassembling the transformer after repair and renewal of defective parts including providing new cork sheet, gasket, packing nuts, bolts, washer etc., complete as required, filling fresh transformer oil and testing complete all as directed. Note : Fresh transformer oil and spare parts incorporated shall be measured under relevant item.

S & F high voltage coil including double paper insulated conductor of same gauge as per existing and all necessary insulating material and baking of coil suitable for various capacities of copper wound step down transformer complete all as directed.

S & F low voltage coil including double paper insulated of same gauge and all necessary insulating material and baking of coil suitable for various capacities of copper wound step down transformer all as directed.

S & F HV porcelain bushing of 11KV grade with gasket suitable for step down transformer upto 500KVA capacity complete all as directed.

S & F LT brass stud with 5 Nos brass nut, brass washers, check nuts, conical rubber bush etc., suitable for transformer upto 500 KVA capacity complete.

S & F oil level indicator suitable for transfomer upto 500KVA capacity complete including taking existing unserviceable indicator complete all as directed.

S & F oil temperature gauge suitable for transfomer upto 500 KVA capacity including taking down existing unserviceable gauge complete all as directed.

Supply and filling fresh transformer oil conforming to ISA 336 and after dehydration dielectric strength should not be less than 60KV at 2.5mm gap for duration of one minute complete all as directed. Note : New transformer oil shall be brought to the site in sealed barrels of 209 ltrs capacity each.

Dismantling existing unserviceable breather assembly complete with silica gel from the transformers and S & F new breather assembly of same type filled with new silica gel for transfomers upto 500KVA capacity complete all as directed.

Dismantling existing unserviceable tap changer assembly complete from the transformer upto 500KVA and S & F new assembly of same type and testing complete all as directed.

Filteration of trasformer oil from transformer of any make / model / type, pole or plinth mounted, installed at various locations under ON load conditions, through portable filteration plant capable of filteration, circulation and heating continuously for a period of minimum 4 hours or till such time the die electric strength of transformer oil with stands 50KVA at 2mm gap for one minute cmplete all as directed. Note : 1. Transformer oil shall be tested at site before and after filteratiion and record shall be maintained duy signed by the Engineer-in-charge and contractor. 2. Rate quoted shall be deemed to include for shifting of filtration plant from one sub station to other sub station. 3. Photographic (digital) record shall be maintained and same shall be submitted to GE on demand.

M & L for painting outer surfaces of transformer of capacity above 100KVA, any type / make / model, pole or plinth mounted, installed at various sub stations with one coat of synthetic enamel paint of approved shade including cleaning the old painted surfaces and writing SM / MES numbers, capacity, make, date of oil testing etc., complete all as directed:-

S & F numerical over current protection relay (2OC + 1 EF + 1 REF IDMTL and INST Proetction ) digital type suitable for 11 KV HT VCB including provision of blanking sheet to match the existing surface of the VCB complete all as directed. Make: Compton Greaves cat NO- CGI 14C or equivalent L&T/ ABB / AREVA

S & F resin coat current transformer 11 KV, indoor type of protection and metering of accuracy class-1, 5P, 10 dual core of ratio 100/50/5 amps, 15 KVA burden including taking down the unserviceable current transformer complete all as specified and directed.

S & F cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 sqmm including taking down unserviceable jointing kit complete all as specified and as directed.

S & F cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm to 185sqmm including taking down unserviceable jointing kit complete all as specified and as directed

S & F Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95/120 sqmm. including taking down unserviceable jointing kit complete all as specified and as directed

S & F Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp including taking down unserviceable lightning arrester complete all as specified and as directed

Supply and install switch Air Break gang operated triple pole, mechanically operated mounted on insulator and steel frame with operating mechanism worked from ground level complete, rating upto 200 Amps 11 KV including taking down unserviceable switch complete all as specified and as directed.

S & F Disc type insulator, single disc assembly for tension with tension clamps for conductors,working pressure 11000 voltsof size 145mm height and 255mm dia, ball and socket type, porcelain, vitreous, white or brown for 11KV volt grade including taking down unserviceable switch complete all as specified and as directed.

Supply, test and commissiong of potential Transfomer 11KV, 50Hz, Class- 0.2, Burden -50VA, fixed type 3 phase resin coat indoor type, including taking down unserviceable switch complete all as specified and as directed.

Excavation in trenches not exceeding 1.5mtr wide and not exceeding 1.5 mtr in depth and getting out in soft/loose soil complete all as specified and as directed.

Returning, filling in trenches, including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick each layer in soft/loose soil all as specified and as directed.

Removing excavated material/surplus soil and depositing where directed at a distance not exceeding 50mtr and depositing at a level not exceeding 1.5 mtr from starting point all as specified and as directed.

Supply lay/spread in trenches, river sand, clean, including spreading, levelling, punning as in cushioning of cables all as specified and as directed. Note :- Punned depth will be measured and paid.

Supply, lay in trenches fly ash bricks, old size for cable protection all as specified and directed. Note:- Bricks shall be laid in such a way that its length is perpendicular to the length of cable.

Supply, laying, connecting and testing HT UG cable FRLS XLPE insulated, screened, PVC bedded, armoured heavy duty electric cable with aluminium conductor, 11000 volts grade sheathed, multi stranded of following cross sectional area 120 sqmm 3 core including taking down of unserviceable cables complete all as specified and as directed :- Note :-(i) Lugs and glands are deemed to be included in the rate quoted for laying of cable and to be used properly wherever required while connecting cables to the panel board. (ii) Earth work such as excavation, refilling, etc. shall be measured separately under relevant items.

M&L cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed including applying two coats of aluminium paint over a coat of primer complete all as specified and as directed.

S & F Horn Gap type Fuse unit, 11000 volts grade, mounted on insulators and steel frame, single pole, fixed on DP structures all specified and as directed including dismantling existing unserviceable fuse unit.

PSK Enterprises