PREVENTIVE MAINT OF 33 KV TRANSFORMER, BREAKER, MATTING, EARTHING, 33 KV JOINT, BATTERY BANK, CT AND PT ETC UNDER GE (EAST) AGRA

Amount

Dehydration and Filtration of existing transformer oil in transformers (33 KV system step down to 33/11 KV) by centrifuging machine on site at different locations without disturbing the power supply system. The machine continuously run round the clock till obtaining the dielectric strength of oil 60 KV minimum 2.5 mm gap and carrying out IR test of primary and secondary of transformer including commissioning and testing of transformers after topping up with new transformer oil complete all as specified and directed. Note:- New Transformer oil for topping up shall be measured in relevant items of BOQ.

Supply & filling up of transformer oil conforming to IS -335 of 1993 as in topping up / replacement up to desired level of transformer oil capacity complete all as specified and as directed. [Note: Dielectric strength of oil should not be less than 42 KV/cm complete all as specified and directed.

Disconnecting all eletrical connections from transformer and dismantling the components of transformer for easy loading transportation unloading the unserviceable transfomer 2 MVA TO 3.15 MVA, 33/11 KV copper wound from 33 KV MRS to workshop and back including installation, testing and commissioning after repairs including painting of complete transfomer and its mounting structure complete all as specified and as directed. Labour only for opening the top cover of transformer and carrying out the following work/repairs by specialist/reputed transformer manufacturer or repairing firm:- (a) Removing of transformer oil from transformer into separate barrels. (b) Taking out the core assembly with HV & LV windings of the transformer. (c) Cleaning the transformer from inside of tank as per manufacturer's guidleines and painting with one coat of zinc paint as per manufacturer's norms. (d) Ovening in vapour phase drying oven at factory workshop for 72 hrs. (f) Filling of transformer oil after centrifuging of complete transformer oil. (g) Reassembling of winding over the core of the transformer. (h) Replacement of bushings, spindle, oil level indicator, winding temperature gauge, oil temperature gauge, drain valve, breather etc shall be measured and paid separately.

(j) Refixing of transformer top cover with new gasket, nut-bolts etc complete. (k) Testing and repair of radiator complete against any type of leakage and carry out soldering/brazing if required to stop the leakage. (l) Checking of Buchholz relay and proper connection to breaker and testing complete. (m) Supply/fixing of insulating /material packing. Note:- (i) Transformer oil, HV and LV windings shall be measured and paid separately. (ii) Routine test, high voltage test, buchholtz relay tripping test and all other mandatory tests as per IS shall be carried out at factory premises. (iii) The quoted rate are inclusive of all minor spare parts that are required to make function electrically to transformer and not mentioned in Sch 'A' BOQ. (iv) The repair work shall have guarantee of 12 months.

Taking out Transformer from its Position from RLB Substation for repair /servicing/ rewinding of capacity 63 KVA , 33/0.433 KV disconnecting /opening HV, LV Electrical connections, earthing connections along with following other works.

(a) Transportation of transformer to workshop and back to site by making necessary arrangements of T&P (crane, recovery, vehicle, tripoid to be arranged by firm ) as directed. (b) Opening of transformer top cover by extraction ,removing of serviceable - unserviceable nuts bolts and washers etc. (c).Draining out of transformer oil and keeping in safe custody for reuse (d) Lifting primary coil (HT) and secondary coil (LT) , dismantaling of transformer complete part by part carefully. (e) Refilling topping up of transformer oil after dehyderation and filteration in transformer. (f) Reassembeling the transformer complete with all existing serviceable parts, and new parts as ordered . (f) Reinstall the Transformer at site in position as directed after repair connecting HV, LV electrical connections, earthing connections and testing to entire satisfaction on load . Note- (a) Replacement of userviceable parts like; Bush insulator, brass studs, cork gasket, breather assembly, tap changer, rewinding , reinsulation of Primary and secondary coil with copper winding wire, dehyderation and filteration of transformer oil etc shall be measured and paid seperately under appropriate Item of schedule. (b) Renewal of adequate size Nut, bolts & washers of transformer top cover shall deemed to be included in UNIT RATE QUOTED

M & L for rewinding HT coil of 33/ .433 KV Transformer any capacity using proper size DPC copper wire and insulation material , heating coils in heat chamber after rewinding including taking out carefully burnt unserviceable copper winding of coils complete all as specified and directed.

M & L for rewinding LT coil of 33/ .433 KV Transformer any capacity using proper size DPC copper wire and insulation material , heating coils in heat chamber after rewinding including taking out carefully burnt unserviceable copper winding of coils complete all as specified and directed.

Re-insulation of LT/HT coil of transformer of any capacity using proper size paper insulation material to form DPC Copper wire and insulation material suitable for HT 33/.433 KV transformer complete all as specified and directed. [Note : Item shall be measured only where re-insulation of copper wire is required].

Supply only breather assembly as per existing size, shape and specification complete for capacity 2 MVA TO 3.15 MVA, 33/0.433 KV transformer complete all as spd and directed.

Taking out the existing silica gel and supplying and filling the new silica gel in the breather of transformer of any capacity complete all as specified and directed by Eng-in-charge.

Supply only brass stud on HT side as per existing size, shape and specification for capacity 2 to 3.15 MVA, 33/11 KV transformers complete all as spd and directed.

Supply only brass stud on LT side as per existing size, shape and specification for capacity 2 to 3.15 MVA, 33/11 KV transformers complete all as spd and directed

S & F in repairs 33 KV Lightning Arrester of discharge capacity of 10 KA peak,transmission class 2, complete all as specified and as directed.

Supply and fix in replacement Gasket set made of rubberised cork/neoprene material for power transformer 33/11 KV of capacity 2/3.15 MVA complete all as specified and as directed.

Supply and fix in replacement HV bushing assembly of 33/11 KV 2/3.15 MVA Power Transformer complete with insulator bushing rod, check nuts, washers, packing complete all as specified and as directed.

Supply and fix in replacement LV bushing assembly of 33/11 KV 2/3.15 MVA Power Transformer complete with insulator bushing rod, check nuts, washers, packing complete all as specified and as directed.

S & F of winding temparture indicator with sensor bulb and dial thermometer suitable for the existing power transformer of 2/3.15 MVA including connection and calibration in the existing transformer complete all as specified and directed.

S & F of oil temparture indicator with sensor bulb and dial thermometer suitable for the existing power transformer of 2/3.15 MVA including connection and calibration in the existing transformer complete all as specified and directed.

M&L for cleaning and removal of disintegrated & deteriorated paint by scrapping and preparation of old painted exposed surfaces of all existing steel structures of 33 KV yard (RLB, Gwalior Road and COD) and capacitor bank structure,gate and fencing etc and applying two coat of aluminium / Synthetic enamel paint all around the exposed steel surface to match with existing colour code (or as approved by GE) compete all as specified and directed. Notes : Rates quoted by the contractor are deemed to include for writing the MES /SM No and other relevant details with synthetic enamelpaint in the pattern and style all as directed.

Disconnecting HT 33 KV outdoor VCB unit and indoor control panel of any capacity , over hauling of complete unit, Calibration & Testing of over current & Earth fault relay by primary & secondary ejection methods, opening the total mechanical and electrical mechanism of breaker, checking its contact, baffle plates and other minor parts, cleaning all complete accessories carefully. Minor repairs shall be rectified, parts/accessories shall be cleaned, the tank, baffle plates, rotating contact, upper supports, lower supports, drive assemblies and all other spare parts, reassembled after repair/ replacement of the spare parts including calibration, testing of existing IDMT relay as per load parameter complete all as specified and directed. Notes :- (i) Repair work shall be carried out only by the authorised technician of manufacturer of VCB. (ii) Spare parts as required for replacement of existing worn out parts shall be measured and paid separately under appropriate items. (iii) Labour for replacement/fixing of the supply only items shall be deemed to be included in the unit rate quoted against this item. (iv) Make of all spare part shall be used as per existing make of manufacturer.

Supply only Spring Charging motor assembly 110/230 Volt AC/DC for 33 KV outdoor VCB complete all as specified & as directed.

Supply only Closing coil Assembly for 33 KV VCB complete all as specified & as directed.

Supply only Tripping coil Assembly for 33 KV VCB complete all as specified & as directed.

Supply only Motor Cut Off Limit Switch for 33 KV VCB complete all as specified & as directed.

Supply only Auxiliary Switch (7 NO + 7 NC) for 33 KV VCB complete all as specified & as directed.

Supply only TNC Switch for 33 KV VCB complete all as specified & as directed.

Supply only Differential relay complete all as specified and directed.

Supply only 33 KV Hand gloves complete all as specified and directed

Dismantling and taking down carefully ACSR conductor from 33 KV Sub station after unbinding from PG clamps for replacement of complete all as specified and directed.

M&L for ACSR conductor of any size drawn straight horizontal on over head lines on poles including binding with insulators using aluminium binding wire, jointing jumpers etc including connections of incoming and out going cables complete all as specified and directed.

M &L for replacement of PG clamps,tee clamps & GI nut,bolts of required size & other connectors for connnecting ACSR dog connectors for jumpering all as required at site complete all as specified and directed.

Fixing only 33KV air break gang operated switches vertical/horizontal mounted including insulators and operating mechanism including dismantling old unsv air break gang operated switches , complete all as specified and directed.(Note : GOD to be issued free for fixing against Sch B)

Disconnecting, taking out old unserviceable under ground cable of rated voltage 33 kV, of any size and any type from trenches including taking out concrete cable cover/ bricks etc. complete all as specified and directed

Supply, laying & testing cable XLPE insulated screened PVC bedded, galvanized steel strip or wire earthed armoured, electric power cables (heavy duty) with stranded aluminium conductor, 33000 volts grade, of size 3 core 120 sq mm, complete all as specified and directed

Excavation in trenches in any type of soil/Hard standing/Road not exceeding 1.5 metre deep and not exceeding 1.5 mtr width and getting out soil including making good the disturbed road/hard standing by providing PCC (1:2:4) type B1 to match with existing surface, complete all as specified and directed

Returning, filling in excavated soil including spreading, leveling, watering and well ramming in layers of 25 cm thick after the cables etc. are laid, jointed and tested complete all as specified and directed .

Removal of surplus excavated soils to a distance not exceeding 50 M and depositing where directed at a level not exceeding 1.5 m above the starting point complete all as specified and directed.

Supply, laying & fixing in replacement double wall corrugated (DWC) pipes made of high density polythyline (HDPE) of size 110mm outer dia medium grade, ISI marked with all accessories i.e. all type of joints, Sockets, Elbows, bends and End caps etc, complete all as specified and directed

Supply and fix in replacement cable jointing kit for 33 KV grade cable for in door termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE, armoured ,Al conductor cable of size 120 sqmm, complete all as specified and directed

Supply and fix in replacement cable jointing kit for 33 KV grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE, armoured, Al conductor cable of size 120 sqmm, complete all as specified and directed

M&L for earthing complete with galvanized earth plate electrode 600 x 600 x6mm thick burried directly in ground vertically to a depth not less than 4.00 M below normal ground level ) with top edge of the plate not less than 3.00 M below normal ground level , connected to and including galvanised iron strip 32x6mm dia as earth lead soldered and riveted to earth plate by means of nuts, bolts, check nuts & washers, of galvanized iron or steel with connected to test point and testing on completion including 40 mm GI light grade pipe for earth lead protection from earth point to earth plate, including provn adequate quantity of charcoal dust mixed with 35 % common salt to a packed thickness of not less than 15 cm in alternate layers of charcoal and salt on all sides of earth plate with 20mm bore medium grade GI Pipe for watering,GI check nut, funnel and wire mesh with and including all necessary excavation & earth work in soft/loose soil, returning filling in, removal of surplus soil to a distance 50 metre,,PCC 1:3:6 type C-1 as in earth pit, 40 mm thick RCC cover using cement concrete 1:2:4 type B-1 reinforced with & including 8 mm dia mild steel TMT bar @ 100 mm c/c Both way with suitable handle for lifting arrangement & including form work complete all as specified and shown in electrical plate No 3 of MES SSR Part I 2009 and as directed. NOTES:- (i) On testing, after completion of Job, if desired earth resistance is not obtained, the earthing shall be redone at without any extra cost by contractor.

M&L for chemical earthing with copper earth plate electrode 900x600x5mm burried directly in earth pit not less than 4.7 mtr below normal ground level and complete size of pit 1.6 mtr x 0.60 m , earth plate connected to copper strip 32x6 mm by means of copper/brass nut, bolt duly brazed earth strip protected with 40 mm bore light grade GI pipe from electrode and upto and including the earth test point of gun metal/ phosphorous bronze of size 75x75x25 mm, 20 mm bore watering pipe, medium grade GI pipe including funnel , wiremess providing alternate layer of 15 cm each charcoal salt and magnesium suplhate layer upto 1.20mtr and including excavation , returning in filling , removal of surplus oil to a distance not exceeding 50m , PCC pit in PCC 1:2:4 type B1 using 20 mm graded stone aggregate RCC Cover 40 mm thick in RCC (1:2:4) type B-1 using 20 mm graded stone aggregate reinforced with 8 mm dia MS deformed bars @ 100 mm CYC both ways including MS handle of 12 mm dia round bar etc to be placed on and including angle iron frame made of section 40x40x3 mm of angle iron complete all as specified.

Supply & fixing earth continuity or main earthing lead 32 mm x6 mm copper strip /earth lead , laid in pipe fixed on walls or any other position including jointing by tinned copper/brass nuts, bolts and washers in addition to brazing at every joint complete all as specified and directed

M&L for spray painting (including bringing compressor of suitable size at site) old painted steel or iron surface of 2/3.15 MVA transformer (33/11KV) complete with all connected fittings & fixtures i.e. buchholz relay, conservator tank, cooling fins and other standard fittings & attachments as per existing colour scheme and pattern with atleast two coats of synthetic enameled paint after duly preparing the surface by cleaning with scrapers and emrey paper to the entire satisfaction including writing of SM No complete all as specified and directed. Note:- Contractor will apply one layer of greese over specification plate / any written letter before painting and clean the same after painting, rates for the same is deemed to be included in the item quoted rates.

Supply and fix high voltage electromat insulating rubber mat 33/11 KV rating, conforming to IS-15652 : 2006 of 6 mm thick, class-C, 33KV grade tensile strength 15 N/Sqmm, insulating resistance with water 500 volt is 1000000 Meg- Ohms, leakage current 10 MA at 33 KV, AC, di-electric strength 65 KV, flame retardant, 36 KV should withstand for 3 min and with good mechanical property including provision of suitable adhesive for fixing all as specified and directed.

M & L for servicing and testing of HT Breaker 11 KV . 630 Amp -1000Amp complete with all test as required and resetting of relay and proper alignment of mechanical system of breaker including renewal of unservicable contact jaw/point , spring charging motor, renewal of connecting plate with copper as per existing size and grear etc where necessary including necessary spares for smooth functioning complete all as specified & directed. Notes :- (i) The quoted rates of the contractor includes for fixing the serviceable parts in position and renewal of unserviceable parts with new parts. The renewed parts shall be measured and paid for separately under appropriate item of BOQ as 'supply only '

Supply only following spare parts for 11 KV breaker / VCB, 400/630 Amps capacity of Make: Crompton Greaves, conforming to the respective cat part given as under :- Note :- (i) Fixing & testing element of following item is deemed to be included under BOQ item No 43 above. (ii) Quantity of under mentioned items is tentative and contractor shall have no claim on account of variation of qtys or non execution of any of the item )

Support insulator

Isolating contact assembly 400/630 amps.

Terminal bushing for 400/630 amps breaker

Fixed contact block 400/630 Amps

Set of 3 Nos SPOUT bushing with CC parts (contact plug) upper 630/800 Amps )

Set of 3 Nos SPOUT bushing with CC parts (contact plug) lower 630/800 Amps )

Space heater

Over voltage / under voltage / Earth fault relay as per sample.

Vaccum interupter type VL-35409 C2 or as per sample

Trip circuit supervision relay as per sample

Master Trip relay suitable for 110volt/1.732( 3 phase over current, earth over current, 3-phase directional over current, earth fault directional over current, voltage controlled over current, 3-phase under current, negetive phase sequence over current, under current, negetive phase sequence over current, under/over frequency and thermal overload on IEC - 61850 Make for relays- L&T or Easun Reytolle as apprved by Engr in charge.

M&L for gravel, hard and preferably rounded with specific gravity not less than 1.6,free from clay,sand,loam and organic impurities of any kind,acid solubility not more than 10% for gravel size 10 mm or larger and 5 % solubility for gravel size smaller than 10 mm,particle size 20mm-30 mm complete all as specified and directed.

S & F of radiator fins for 3.15 MVA 33/11KV power transormer having height of 1360 mm ,width of 520 mm and thickness of 1.2 mm including all connecting parts required for its installation having 19 fins in each column complete as specified and directed.

Supply and fixing in renewal HT Shunt capacitor, non self healing type as per IS:13925 of capacity 50 KVAR of single unit with rated capacity 7.2 KV, 50 Hz, all polyprolene film foil design with internal fuse protection to match with existing panels as per sample and complete all as specified and directed.

Supply and fixing HDPE liner sheet heavy duty black colour,min thickness 250 micron including jointing and 10 cm over lap material complete all as specified.

virendera singh

M/S VIDIT ENTERPRISES