CERTAIN REPAIRS TO 33 KV TRANSFORMERS, CONNECTED WORKS AND VCBS UNDER GE (N) BIKANER AT MIL STN BIKANER

Amount

Servicing and testing of Power Transformer 5 MVA 33/11 KV installed at KLP Power House by disconnecting HV & LV side, WTI, OTI, buchholz wiring and earthing complete and carrying out following tests in the presence of Engineer-in-Charge and produce test certificate complete all as specified & as directed :- (a) Earth Resistance Test. (b) BDV Test. (c) IR value of windings HV & LV side both on short circuit and open circuit position. (d) Polarisation Index value of Transformer. (e) IR value of bush insulators LV & HV side. (f) Tuning of WTI, OTI and buchholz with VCB panel and carrying out tripping.

Supply and fixing in replacement HV bush assembly of 33/11 KV 3.15/5 MVA Power Transformer complete with insulator bushing rod, check nuts, washers, packing complete all as specified and as directed.

Supply and fixing in replacement LV bush assembly of 33/11 KV 3.15/5 MVA Power Transformer complete with insulator bushing rod, check nuts, washers, packing complete all as specified and as directed.

Supply and fixing in replacement Gasket set made of rubberised cork/neoprene material for power transformer 33/11 KV of capacity 3.15/5 MVA complete all as specified and as directed.

Supply and fixing in replacement WTI (Winding Temperature Indicator) for power transformer 33/11 KV of capacity 3.15/5 MVA including necessary wiring from WTI, Marshalling box to 33 KV VCB complete all as specified and as directed.

Supply and fixing in replacement OTI (Oil Temperature Indicator) for power transformer 33/11 KV of capacity 3.15/5 MVA including necessary wiring from OTI, Marshalling box to 33 KV VCB complete all as specified and as directed.

Supply and fixing in replacement Buchholz relay for power transformer 33/11 KV of capacity 3.15/5 MVA including necessary wiring from Marshalling box to 33 KV VCB complete all as specified and as directed.

Supply and filling new mineral grade transformer oil EHV type conforming to IS-335 of 1993 for topping up in transformer duly filtered with filtration plant to obtain high dielectric strength not less than 40 KV (gap 2.5mm) complete all as specified and as directed. Note : Transformer oil shall be supplied in sealed barrels with test certificate. Cost of barrel shall be deemed to be included in the unit rate quoted by the contractor and empty barrel will be the property of the Department and same shall be deposited to the AGE E/M Store Yard. Nothing extra shall be paid on this account.

Dehydration & filtration of transformer oil with portable filtration cum dehydration machine to improve the dielectric strength, not less than 50 to 60 KV within 1 minute with 4 mm Gap at site of any installation in Cantt area of any capacity/make of transformer installed on pole mounted, indoor/outdoor type plinth mounted complete all as specified and as directed. Notes: (i) All necessary T&P / testing equipment shall be provided by the contractor at his own cost. No extra payment shall be made to the contractor. (ii) Contractor shall ensure that there shall be no wastage of transformer oil. (iii) Contractor shall ensure that conservator tank is full to its level before starting the dehydration. (iv) New Transformer Oil required for topping up shall be measured and paid for separately under relevant item of this Schedule. (v) Testing of dielectric strength of dehydrated transformer oil of each transformer shall be carried out in the presence of Engineer-in-Charge and cost thereof shall be borne by the contractor.

Surface dressing not exc 15cm deep in soft/loose soil and clearing away all grass vegetation, saplings, shrubs, brushwood, undergrowth, roots, and trees not exceeding 30 cm girth (measured one metre above ground level) surrounding Transformers, LT Panels, 02 Pole structures, 04 Pole Structures, etc at various sub stations / E&M installations and removing rubbish upto a distance exc 200m & not exc 250m outside the periphery of the area under clearance complete all as specified & as directed.

Taking out silica gel from unserviceable breather assembly of transformer of any capacity and supply & filling new Silica Gel blue in crystal complete all as specified and as directed.

Disconnecting HT 33 KV outdoor VCB unit and indoor control panel capacity upto 1600 Amp, over hauling of complete unit, 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 IDTM 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 Power pack with battery backup 230/110 Volt AC input and 24 Volt DC output for VCB complete all as specified & as directed.

Supplying, installing, testing, calibrating and commissioning of the electronic relays with instant tripping system, working voltage 24 V/110 V, EF 10% to 40% in 50% to 200% in advance including taking out the existing unserviceable relay (CG114N/CG114S) complete all as specified and as directed.

Supplying, installing, testing, calibrating and commissioning of the master trip relays, working voltage 24 V / 110 V complete including taking out the existing unserviceable relay all as specified and as directed.

Supply only Vacuum Interrupter bottle 4 inch dia (Make-Stelmac/CG/Siemens) for 33 KV outdoor VCB complete all as specified & as directed.

S&F in replacement PVC insulated copper conductor cable of size 2.5 Sqmm 12 Core, 1100 Volts grade (ISI marked), FRLS, complete all as specified and as directed.

S&F in replacement PVC insulated copper conductor cable of size 2.5 Sqmm 4 Core, 1100 Volts grade (ISI marked), FRLS, complete all as specified and as directed.

S&F in replacement PVC insulated copper conductor cable of size 1.5 Sqmm Single Core, 1100 Volts grade (ISI marked), FRLS, complete all as specified and as directed.

S&F Pin type insulator, porcelain, vitreous, white, brown or green (SC-PN-3301) for working pressure 33000 Volts, 220mm height and 280mm dia including galvanized mild steel spindle, two Nos GI washers, one No GI nut, including dismantling & taking down old unserviceable insulator, complete all as specified & as directed.

S&F Disc type insulator, porcelain, vitreous, 145mm high and 255mm dia ball and socket type, white, brown or green, single disc assembly for tension with tension clamps for conductors, working pressure 33000 Volts, including dismantling & taking down old unserviceable insulator, complete all as specified & as directed.

S&F galvanized mild steel Disc insulator (Tongue and Clevis type) strain hardware fitting with three bolted tension clamp and one cross arm clamp suitable for ACSR Dog conductor of 33 KV over head line, fixed in repairs, complete all as specified & as directed.

S&F galvanized mild steel Disc insulator (Tongue and Clevis type) strain hardware fitting with three bolted tension clamp and one cross arm clamp suitable for ACSR Panther conductor of 33 KV over head line, fixed in repairs, complete all as specified & as directed.

S&F PG Clamp for ACSR Panther conductor, fixed in repairs, complete all as specified & as directed.

S&F PG Clamp for ACSR Dog conductor, fixed in repairs, complete all as specified & as directed.

S&F PG Clamp for ACSR Rabbit conductor, fixed in repairs, complete all as specified & as directed.

Repair to GOD switch 33 KV, HT mechanically operated vertical horizontally operated by cleaning of moving/static contacts with tetra chloride solution, scrapping and making smooth to existing spot points of the contacts by emery paper, providing grease on moving contacts, mechanical torque joint, tightening of canopy with drop out fuse set (three contacts in each GOD) complete all as specified and as directed.

S&F GOD switch insulator, HT 33 KV, Post type insulator conforming to IS, fixed in repairs, complete all as specified and as directed.

S&F 33 KV GOD Copper pipe of 20 mm bore with all necessary fittings suitable for 200/400 Amps capacity horizontal operated GOD switches, fixed in repairs, complete all as specified and as directed.

S&F in replacement of Copper Female contact with all necessary fittings suitable for 200/400 Amp capacity vertical / horizontal operated 33 KV GOD switch, complete all as specified and as directed.

Repair to locking arrangement devices of 33 KV GOD switch and making it fully functional with provision of nuts, bolts, washers & strips, complete all as specified and as directed.

S&F Lightning arresters HT 33 KV 65 kilo Amp Non linear expulsion type transmission class with standard fittings confirming to IS-3070 (Part-I) 1985, fixed in repairs, complete all as specified & as directed.

M&L for earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required, GI iron strip 32x6mm, fixed in repairs, complete all as specified and as directed.

M&L for Earthing to Transformer / GOD switch / equipments / panels etc with & including galvanised mild steel earth plate electrode of size 60 cm x 60 cm x 6 mm thick buried vertically in ground (earth pit not less than 2.25 m below normal ground level) with top edge of the earth plate at a depth not less than 1.5 m below ground level, the earth electrode surrounded by adequate quantity of charcoal dust and salt to a packed thickness of 15 cm on all sides, connected to & including galvanized iron earth wire 4 mm dia as earth lead, including nuts, bolts, check nuts & washers of galvanized iron or steel and riveted to earth plate at one end and other end of earth wire connected to transformer / GOD / Panel / equipment body / test point, GI earth wire encased in and including 15mm bore GI light grade pipe with all fittings from upper edges of earth plate upto 7.5 metre above ground level fixed with and including 25x3mm flat iron clamps, bolts, nuts and washer and also including providing watering pipe 20mm bore GI pipe medium grade from earth pit to top of electrode and including funnel, wire mesh, copper lugs etc complete with earth pit in PCC 1:3:6 type C1 using 20mm graded crushed stone aggregate and 40mm thick RCC (1:2:4 type B1) cover complete all as specified and shown in electrical plate No 3 of SSR Part-I including necessary excavation and earthwork in any type of soil, returning, filling in approved soil and disposal of surplus soil to a distance not exc 50m complete all as specified and as directed including dismantling & taking out old existing unserviceable earthing. Note : PCC chamber shall be constructed at least 1.5 mtr away from the earth electrode and pipe for watering shall be provided in slanting manner.

M&L for Earthing to Transformer / GOD switch / equipments / panels etc with & including galvanised mild steel earth plate electrode of size 60 cm x 60 cm x 6 mm thick buried vertically in ground (earth pit not less than 2.25 m below normal ground level) with top edge of the earth plate at a depth not less than 1.5 m below ground level, the earth electrode surrounded by adequate quantity of charcoal dust and salt to a packed thickness of 15 cm on all sides, connected to & including galvanized mild steel strip 32x6 mm as earth lead, including nuts, bolts, check nuts & washers of galvanized iron or steel and riveted/welded to earth plate at one end and other end of strip connected to transformer / GOD / Panel / equipment body / test point with two Nos nuts bolts or welding with steel structure, GI earth strip encased in and including 40mm bore GI light grade pipe with all fittings from upper edges of earth plate upto 7.5 metre above ground level fixed with and including 25x3mm flat iron clamps, bolts, nuts and washer and also including providing watering pipe 20mm bore GI pipe medium grade from earth pit to top of electrode and including funnel, wire mesh, copper lugs etc complete with earth pit in PCC 1:3:6 type C1 using 20mm graded crushed stone aggregate and 40mm thick RCC (1:2:4 type B1) cover complete all as specified and shown in electrical plate No 3 of SSR Part-I including necessary excavation and earthwork in any type of soil, returning, filling in approved soil and disposal of surplus soil to a distance not exc 50m complete all as specified and as directed including dismantling & taking out old existing unserviceable earthing. Note : PCC chamber shall be constructed at least 1.5 mtr away from the earth electrode and pipe for watering shall be provided in slanting manner.

M&L for 40mm graded crushed stone aggregate, deposited, spread and leveled in layers not exc 15 cm thick, rammed to a true surface, under 2/4 pole structure and around the 2/4 pole structure & outdoor electrical installations, complete all as specified and as directed.

Tightening of existing loose stay wire of stay assembly with suitable tension including providing nuts and repair to other wire, un-winded stay wire etc, complete all as specified and as directed

S&F Danger notice plate of 25x20cm size, 1.6mm thick mild steel sheet, vitreous enameled white, with letters, figures and conventional skull and bones in signal red colour for HT 33000 Volts and fixed with suitable MS clamps made out of flat iron 25x3mm, bolts and nuts of approved size, fixed in repairs, complete all as specified & as directed.

Re-straining/re-stringing/tightening of existing HT 33 KV over head Aluminium Conductor Steel Reinforced (ACSR) and GI earth wire of any size/type upto permissible sag in between existing span carefully without damaging other components such as insulators etc of HT distribution system with & including repair to broken conductor where required and replacement of binding wire with new 2mm dia aluminium binding wire complete all as specified and as directed. Note :- Unit for measurement and payment for this item “Each span” is comprising of 3 Nos ACSR conductors and one GI earth wire between two adjacent poles in line.

Cutting/trimming/pruning of tree branches around the HT 33 KV overhead line 3 metre clearance alround from the external conductors and removing the same from site and depositing at places within the Cantt area complete all as specified and directed. Note : Unit for measurement and payment for this item is “Each span” irrespective of number of conductors in over head line.

M&L for painting to steel tubular HT pole 11 / 12 metre long of any size with two coats of synthetic enamel paint in alternate black and yellow strips 30 cm each upto 1.50 metre height from top of PCC coping/pedestal and applying two coats of aluminium paint to remaining portion of steel pole, over cross arms, brackets, bracings, clamps, hooks etc and marking pole number in letters & figures of size not less than 8cm height including preparation of old surfaces for painting complete all as specified & as directed.

M&L for cable jointing kit for 33 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 240 sqmm, including dismantling & taking out old unserviceable jointing kit, complete all as specified & as directed.

M&L for cable jointing kit for 33 KV (Earthed) grade cable for straight through cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 240 sqmm including dismantling & taking out old unserviceable jointing kit complete all as specified & as directed.

M&L for cleaning and preparation of old painted steel & iron surfaces (exposed external surfaces only) of transformer 5 MVA 33/11 KV capacity installed at site by scrapping with steel wire brush, emery paper, using coarse cloth/sore brush etc and painting with two coats of synthetic enamel smoke grey paint over a coat of red oxide zinc chrome primer with the help of spray gun & machine, including writing of SM No., MES No etc. on transformer with thick black synthetic enamel paint in white back ground, complete all as specified and as directed.

M&L for cleaning and preparation of old painted steel & iron surfaces (exposed surfaces only) of lattice tower structure complete at KLP Power House (33/11 KV Sub Station) by scrapping with steel wire brush, emery paper, using coarse cloth/sore brush etc and painting with two coats of Aluminium paint over a coat of red oxide zinc chrome primer complete all as specified and as directed.

M&L for cleaning and preparation of old painted steel & iron surfaces (exposed surfaces only) of lattice tower structure complete at Udasar Power House (33/11 KV Sub Station) by scrapping with steel wire brush, emery paper, using coarse cloth/sore brush etc and painting with two coats of Aluminium paint over a coat of red oxide zinc chrome primer complete all as specified and as directed.

S&F cross arms, bracing, supports, clamps and back plates fabricated from structural steel sections conforming to Grade E-165 (Fe 290) including nuts, bolts, washers, welding, bending cold or hot, drilled holes for bolts, in any shape or size as directed with & including applying two coats of aluminium paint (under & finishing coats) over a coat of red oxide zinc chromate primer on exposed steel surfaces after preparation of surfaces including taking down old unserviceable complete all as specified and as directed . Note: - (i) Sizes, sections & types of members and shape of the cross arms etc shall be as required at site and all as directed. (ii) Un-exposed steel surfaces shall be given one coat of red-oxide zinc chromate primer only. Cost of the same is included in unit rate of the item and nothing extra shall be paid on this account. (iii) Weight of paint shall not be considered for payment purpose and quoted rate shall deemed to be included this aspect.

M&L for Galvanized iron tubing, 80mm bore light grade, ISI marked, including all fittings and laid in trenches/under road/drains, fixed to poles/walls with required size of flat iron (25mmx3mm) clamps, bolts, nuts and washers for protection of HT electric cable including taking down old unserviceable protection pipe with clamps complete all as specified & as directed. Note :- Excavation & earthwork shall be measured & paid for separately.

Material and labour for rennovation and testing of earthing and submission of desired test reports as per direction of Engineer-in-Charge. Note : Material required for rennovation of earthing, earth pit, earth pit cover is deemed to be included in quoted rates.

Material and labour for fixing of 3mm thick acrylic sheet of size 60cmx60xm, writing 11 KV feeder name, size of letter not less than 8cm of height, fixing on two pole structure etc necessary fixing arrangement, nut, bolt and clamp complete all as specified and directed.

Material and labour for preparation of schematic diagram of 33/11 KV sub station at KLP power house and printing on flex paper and fixed on suitable frame of size 15x10 as directed by Engineer-in-Charge.

m/s krishna builders

M/s Rohit Construction Co.

ALPHA ENGINEERING COMPANY