REPAIRS AND MAINTENANCE TO HT DISTRIBUTION SYSTEM, HT OVERHEAD LINES, HT UG CABLES AND CONNECTED WORKS IN VARIOUS LOCATIONS AT AIR FORCE STATION JAISALMER

Amount

Excavating in trenches in soft/loose soil , not exc 1.5 m wide and not exc 1.5 m in depth; for foundation, electric cables, water supply pipe lines, poles, struts/stays, for shafts, wells, cesspits,manholes, pier holes, etc. n exc 10 sq m on plan and not exc 1.5 m in depth and getting outcomplete all as specified and directed

Excavating in trenches in hard/dense soil , not exc 1.5 m wide and not exc 1.5 m in depth; for foundation, electric cables, water supply pipe lines, poles, struts/stays,for shafts, wells, cesspits,manholes, pier holes, etc. n exc 10 sq m on plan and not exc 1.5 m in depth and getting out complete all as specified and directed

Removing excavated material to a distance n exc 50m and depositing where directed at a level n exc 1.5m above the starting point complete all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exc 25 cm. Returning, filling including spreading, leveling watering & well ramming in layers not exc. 25 cm for soft/loose soil complete all as specified and directed.

M&L for Sand cushioning (tibba sand) to under ground cable in trenches/existing cable trenches/ducts in layers of 8 cm deep before laying the cable and 15 cm deep after laying and stretching the cable complete all as specified and directed. Note : Punned thickness shall be measured and paid.

Supply and spread 40mm graded stone aggregate in the substation/ as where directed at site complete all as specified and directed.

S&F in replacement HT Lightning Arrestor Metal Oxide Type (Gap less) heavy duty single pole suitable for system voltage of 12 KV and working rated arrestor voltage 9 KV with normal discharge current of 10 KA all as per IEC 99.4 effectively earthed including taking down of existing lightening arrestor complete all as specified and directed.

Supply, hoist, joint, fix and test in replacement Aluminium Coductor Steel Reinforced (ACSR) for overhead lines on poles including aluminium binding wire 14 SWG , jumpers , line tapes etc complete all as specifed of size as directed at site. Note :- For payment purpose weight of ACSR conductor shall be considered.

S&F in replacement Pin type insulator porcelain viterous white brown or green incl one galvanised mild steel spindle two galvanised iron washer and one galvanised iron nuts 150 mm height, 150 mm dia for 11KV grade complete all as specified and directed.

S&F in replacement Disc type composite polymeric insulators, 11 KV grade, 45 KN, with tension clamps, bolts, nuts etccomplete all as specified and directed.

S&F in replacement Post insulator porcelain vitreous, white, brown or green suitable for Gang operated Air brake switch 11KV grade including mild steel spindle, nut, bolts etc complete.

S&F in replacement of Pin type porcelain, vitreous, white brown or green insulator including 1 galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nuts suitable for 33 KV grade complete all as specified and directed.

S&F in replacement Disc insulator , porcelain, vitreous 145 mm high and 255 mm dia bolt and socket type, white, brown and green suitable for 33 KV grade (main receiving station)complete all as specified and directed.

S&F in replacement Post type insulator suitable for 33 KV grade complete all as specified and directed.

S&F in replacement Mild Steel Cross arms , bracing, supports, clamps and back plates fabricated from structural steel section including nuts, bolts, washers, welding , bending, cold or hot, drilling holes or bolt in any shape or size including 2 coats of aluminium paint over a coat of red oxide primer complete all as specified and directed. Note : Unexposed surface shall be given one coat of primer only.

S&F in replacement Switch Air break Gang Operated (GOD) Switch outdoor type HT 11 KV triple poles 400 Amps with fixed contacts of phosphorus bronze and moving contacts of copper with mechnically operating from ground level vertical mounted complete with HT insulator on steel frame operating rod made out of 25 mm GI pipe medium grade worked from ground level with handle and locking arrangment with 12 inuslators with drop out fuses complete all as per specified and directed. Note:- Clamps/cross arms shall be measured and paid for separately.

S&F in replacement Switch Air break Gang Operated (GOD) Switch outdoor type HT 11 KV triple poles 200 Amps with fixed contacts of phosphorus bronze and moving contacts of copper with mechnically operating from ground level vertical mounted complete with HT insulator on steel frame operating rod made out of 25 mm GI pipe medium grade worked from ground level with handle and locking arrangment with 9 inuslators with drop out fuses complete all as per specified and directed. Note:- Clamps/cross arms shall be measured and paid for separately.

Supply, fix, joint and test in replacement Cable Jointing Kit for 11 KV grade cable for outdoor type end termination heat shrinkable joint complete with jointing material and accessories suitable for XLPE armored aluminum cable of size 95 sqmm 3 core complete all as specified and directed. Make - Denson/ M seal/ Raychem/ 3M.

Supply, fix, joint and test in replacement Cable Jointing Kit for 11 KV grade cable for outdoor type end termination heat shrinkable joint complete with jointing material and accessories suitable for XLPE armored aluminum cable of size 120 to 185 sqmm 3 core complete all as specified and directed. Make - Denson/ M seal/ Raychem/ 3M.

Supply, fix, joint and test in replacement Cable Jointing Kit for 11 KV grade cable for indoor type end termination heat shrinkable joint complete with jointing material and accessories suitable for XLPE armored aluminum cable of size 95 sqmm 3 core complete all as specified and directed. Make - Denson/ M seal/ Raychem/3M.

Supply, fix, joint and test in replacement Cable Jointing Kit for 11 KV grade cable for indoor type end termination heat shrinkable joint complete with jointing material and accessories suitable for XLPE armored aluminum cable of size 120 to 185 sqm 3 core complete all as specified and directed. Make - Denson/ M seal/ Raychem/3M.

Supply, fix, joint and test in replacement Cable Jointing Kit for 11 KV grade cable for indoor type end termination heat shrinkable joint complete with jointing material and accessories suitable for XLPE armored aluminum cable of size 240 to 300 sqmm 3 core complete all as specified and directed. Make - Denson/ M seal/ Raychem/3M.

Supply, fix, joint and test in replacement 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 sqmm to 120 sqmm complete all as specified and directed. Make - Denson/ M seal/ Raychem/ 3M.

Taking out the old unsv HT cable after disconnecting from over head line and panel rated voltage of 11000 Volts from trenches, pole etc complete all as specified and directed

M&L relaying of old existing cable retrived from the same after, jointing or necessary repair work and testing XLPE insulated PVC outer seathed and PVC inner sheath, galvanised steel strips armoured, and reconnecting the cable from over head line and panel suitable for rated voltage of 11000 Volts grade Earthed system of size 95/120 sqmm 3 Core and laid in treches/ducts/pipe or on read/pole all as required and directed at site. Note: excavation and earth work joints will be measured and paid seprately

Supply, lay, joint and test HT XLPE under ground insulated, screwed, PVC bedded, galvanized steel strip or wire armoured electric power cable (heavy duty) with stranded aluminium conductor, 11000 Volts grade earthed system of size 95 Sqmm 3 core confirming to IS laid in trenches, in floor, in duct, through pipes or along the pole complete all as specified and directed.

Supply, lay, joint and test HT XLPE under ground insulated, screwed, PVC bedded, galvanized steel strip or wire armoured electric power cable (heavy duty) with stranded aluminium conductor, 11000 Volts grade earthed system of size 120 Sqmm 3 core confirming to IS laid in trenches, in floor, in duct, through pipes or along the pole complete all as specified and directed.

M&L for Earthing complete with galvanised steel earth plate electrode 60 cm x60 cm x 6 mm thick buried directly in ground ,(Earth pit not less than 2.25 meter deep below ground level) with top edge of plate not less than 1.5 meter below normal ground level ,connected to and including galvanised iron earth strip 32 X 6 mm by means of nut, bolts, check nuts and washers of galvanised iron or steel and provision of charcoal dust and common salt packed all around the earth plate including necessary excavation and earth work in any type of soil and testing complete all as specified and directed and shown in electrical plate number 3 of MES SSR part-I(2009) (a) Excavation and earth work for drilling hole for electrode in any type of Soil. (b) PCC pit in cement concrete 1:2:4 type B-1, Pre cast RCC cover with suitable handle 40 mm thick in PCC 1:2:4 type B-1, reinforced with welded steel wire fabric weighing not less than1.87 Kg/ Sq meter. (c) Funnel with watering pipe of GI 20 mm nominal bore light grade and lugs etc complete all as specified and directed (d) The unit rate shall deemed to include for Test point, PCC pit, 32x6mm GI earth strip from top of the earth plate up to 7.5m above ground level and 40mm bore GI pipe medium grade protection pipe up to 7.5m. (e) Requisite quantity of common salt and charcoal. (f) Testing of earthing. On testing after completion if the desired earth resistance is not obtained the earthing will be redone without any extra cost to Govt.

S&F 25x4mm size galvanised iron strip 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 pr fixed to poles or any other indicated situation for loop earthing etc complete all as specified and directed.

Supply, lay, joint and fix in replacement 100mm Galvanised Iron Pipe light grade with all fittings as protection pipe for earth strips, laid in trenches, fixed on poles, walls and ceilings or laid in floors, laid in road crossing /hard standing/pole protection fixed with clamps of size 25x3mm mild steel flat iron as welded to pipe as per site requirement etc complete all as specified and as directed. Note:- Excavation & earth work, sand cushion, protection cover where required shall be measured & paid separately under relevant items:-

Repairs/overhauling to 11KV HT control Panels complete in and including the following repair works :- (a)Taking out 11KV High Tension VCBs/OCBs of 300Amps to 800 Amps rating trolley from High Tension control Panel after switching off electric supply.Checking of mechanical system for proper functioning of upward/downward movement of High Tension Vacume Circuit Breakers trolley including opening the VCB & checking the quality of vacume bottles/links , & servicing the fixed/ moving contact & blowing out dust and applying the proper lubrication/ greasing and reassembling the VCB including connection to HT panel complete and refixing the same after repair complete all as directed. (b). Taking out existing relay set from high tension of any type and size, 11KV, VCB control panel and cleaning the contact (NO+NC) by CTC solution and adjust the contact and calibration the relay by giving the primary and secondry injection and checking the tripping system by relay testing kit for over current and earth fault & proper plug setting as per reqd load & time delay and fixing the relay set in High Tension control panels complete all as specified and directed by EIC .Note:- Testing of above job to be carried out by Authorized commisioning Engineer (b) spare parts to be replaced shall be measured & paid separately under the relevent items as supply only.

Supply only Vaccum interrupter 2.4 inch suitable for 630 A VMX breaker

Supply only Fixed contact block of VCB 630 Amps, 11 KV including taking down old material

Supply only support insulator (75mm dia) of VCB 630 Amps, 11 KV.

Supply only auxiliary switch (6NO + 6NC) of VCB 630 Amps, 11 KV.

Supply only solenoid closing coil 30/110 v DC, suitable for type V 207G VCB 630 A VMX Breaker.

Supply only load break mechanisim assembly (2PA mechanisim without hex rod) having two position spring assisted, integrated line earthing siwtch making capacity complete all as specified of 11 KV RMUs, 11 KV Control panels as per existing complete all as specified and directed

Supply only isolator mechanisim assembly having two position spring assisted, integrated line earthing siwtch making capacity complete all as specified of 11 KV RMUs, 11 KV Control panels as per existing complete all as specified and directed

Supply only SF 6 Gas in RMUs, SF 6 Control panels (09 Kg per cylinder) as per requirement complete all as specified and directed, Cat Part No S194-5600-103-17 of ABB or equivalent make of Schneider or crompton

Supply only bushing 400 series bolted type with "O' Ring, clamping nut and wave washers M 12 complete all as per existing specifred and directed

Supply only cable bushing plate as per existing complete all as specified and directed

Supply only ON push button with Z lever complete as per existing complete all as specified and directed,

Supply only OFF push button with Z lever complete as per existing complete all as specified and directed,

Supply, fix and connect in replacement Announciator suitable for 11 KV indoor control panel with necessary wiring and testing on completion complete all as specified and directed.

Supply only shunt trip coil assembly suitable for High Tension ,VCB control panels, operating on 30/110 volt system and testing complete all as specified and directed by EIC.

Supply only charging motor for high tension, 11 KV, VCB panels, 400 Amps, operated on 230 volts AC or 30 Volts DC as per sample complete all as specified and directed by EIC.

Supply only upper spout HT 11 KV VCB as per sample and fixing on panel all as required at site

Supply only Male contact made of tinned copper VCB panel 11 KV made of brass as per sample and fixing testing all as required and directed at site

S&F in replacement Resin/Epoxy casted air cooled high tension current transformer of dual ratio of 200-100/5 Amps, 10 VA burden out put, accuracy class - 0.5, suitable for rated voltage system of 11KV conforming to IS 2705/IEC 60044-1for metering/protection of breakers complete all as specified and directed including taking down old

S&F Resin/Epoxy casted circuit spout with metallic fittings of good conductivity as specified to connect/match with the existing 11KV bus bar complete in all respect as directed. including taking down old

S&F in replacement Over Current and earth fault relay having auxilary voltage 24-110 volts, + 15% AC/DC complete all as specified and directed,

S&F in replacement Panel lighting lamp with holder with on/off toggle switch

S&F in replacement bakelite HRC fuses in control/VCB panels

S&F in replacement Breaker control switch suitable for 33 KV control panel and outdoor VCBs complete all as specified and directed including taking down old

S&F in replacement Power factor meter as per existing or as approved by the GE

S&F in replacement Digital multifunctional meter as per existing or as approved by the GE

S&F in replacement Indicator lamp with holder for various control panels/ VCB panels complete all as specified and directed

S&F in replacement Jaw Blade male & female made of bronze / brass metal suitable for GO switch 200 Amps, 11000 volts, including nut, bolts, washers etc complete.

M&L for 40 to 50 mm thick rough dressed Jodhpur type stone slab 25 to 35 cm in width of 80 cm long laid dry abutting each other for protection to under ground cableall as specified and directed.

M&L for boring hole under the road / pavement / hard standing with the help of trenchless technology using ultra sound technique and necessary machine for inserting GI pipe of size 100/80 mm not less than one metre below ground level complete all as specified and directed.

M&L for preperation of old painted surface of PCC HT poles and applying two coats of synthetic enamel paint in alternate black & white strips of 30 cm each up to 1.5 mtr height from top of PCC coping and numbering of poles complete all as specified and directed.

Disconnecting and taking down faulty / defective aluminium / copper wound transformer of capacity up to 750 KVA ratio 11 KV / 0. 433 or 0.415 KV from 2/4 pole structure or sub station in Jaisalmer/chandan air force stn and transporting & depositing to AGE E/M AF Jaisalmer or as directed by the Engr-in-charge complete all as specified and directed by EIC.

Transporting of aluminium / copper wound transformer of capacity up to 750 KVA, ratio 11 KV / 0.433 or 0.415 KV from AGE E/M (AF) Jaisalmer yard to any sub station located in Jaisalmer/Chandan and connecting the same electrically and earthing complete

Transporting faulty / defective transformer rating upto 750 KVA ratio 11 KV / 0.433 or 0.415 KV to contractor workshop from AGE E/M (AF) Jaisalmer and opening the top cover of transformer, carrying out of the followings works / repairs/maintenance and transporting back :- (a) Taking out the transformer oil from transformer into seperate container barrel. (b) Taking out the core / coil assembly of transformer. (c ) Cleaning of transformer inside by used transformer oil. (d) Re-fixing the core/coil in transformer including heating up of transformer core assembly to remove moisture after carrying out the repair as required in respective serials of Sch 'A' items. (e) Replacement the rubberised gasket set for top cover, spindles, HT / LT bushing etc. as required Note :- i) All labour costs are included in this serial. In case of replacement of LV / HV bushing / spindles / rewinding of HV / LV coils / top changer etc will be paid separately under respective serial. (ii) Filtration / centrifuging of usable transformer oil to remove moisture and suspended dust particles to be measured & paid for separately. (iii) Topping of transformer oil (if required) will paid under respective item. (f) Refilling of the removed transformer oil after heating up for removal of moisture. (g) Re-fixing of the transformer top cover with nuts, bolts and washers. (h) Testing of transformer Complete.

Repairs / reconditioning of LV leg coil aluminium / copper for transformer of capacity up 750 KVA to be done only in case where only insulation is damaged and conductor strip is intact i.e. not deformed. This work will involve valve all turns of leg coil to be reconditioned removing complete insulation from conductor strip, cleaning of conductor, wrapping of conductor with fresh DPC insulation and remaking of LV leg coils with reconditioned strip for use in transformer under repairs complete all as directed.

Repairs / reconditioning of HV leg coil aluminium / copper for transformer of capacity upto 750 KVA including insulation, varnishing by vaccum impregnation and backing of coil assembly complete all as specified and directed by EIC.

Supply only LV leg coil of aluminum conductor for transformer of capacity upto 750 KVA complete with insulation, varnishing by vaccum impregnation and baking of coil assembly, etc. complete all as specified and directed.

Supply only LV leg coils of copper conductor for transformer of capacity up to 750 KVA complete with insulation, varnishing by vaccum impregnation and baking of coil assembly, etc complete all as specified & directed by the EIC

Supply only HV leg coils of Aluminum conductor for transformer of capacity up to 750 KVA complete with insulation, varnishing by vaccum impregnation and baking of coil assembly, complete all as specified and directed.

Supply only HV leg coils of copper conductor for transformer of capacity up to 750 KVA complete with insulation, varnishing by vaccum impregnation and baking of coil assembly, etc complete all as specified & directed by the EIC.

Supply only HV bushing 11 KV for transformers up to capacity 750 KVA complete all as specified and directed.

Supply only LV bushing 0.433 / 0.415 KV for transformer up to rating 750 KVA complete all as specified and directed.

Supply only HV spindle (metal part) made out of brass with nuts and washers complete for transformer of capacity up to 750 KVA complete all as specified and directed.

Supply only LV spindle (metal part) made out of brass with nuts and washers complete for transformer of capacity up to 750 KVA complete all as specified and directed.

Supply, fill and top up new Transformer Oil, low viscosity type of dielectric strength 35 to 40 KV breaking voltage conforming to IS complete for indoor / outdoor transformer in various sub stations under GE (AF) Jaisalmer (of capacity up to 750 KVA transformer) all as directed.

S&F silica gel complete suitable for up to 750 KVA transformer rating all as specified and directed.

S&F silica gel breather (transparent type) with silica gel complete suitable for up to 750 KVA transformer rating all as specified and directed.

S&F dial type thermo meter of minimum 100 mm dia with maximum temperature indicator for transformer of capacity up to 750 KVA all as specified and directed.

M&L for centrifusing (Filteratin/dehydration of transformer oil including filter action using automatic centrifusing machine including arrnging elect supply for operation of machine to achieve min. 50 to 60 KV breaking capacity at 4 mm gap by absorbing and abolishing all sludge particles for use as per BS-B 66-1983 complete all as specified and directed.

M&L for Opening the top cover (in case of replacement of HT/LT spindle and bushing for arresting leakage) and taking out transformer oil as required and S&F rubberised synthetic gasket for top cover, LT terminal box, LV / HV bushings, spindles etc suitable for transformer of rating upto 750 KVA all as specified and directed. Note:- In case replacement bushing / spindle will be paid as supply only.

M&L for Repairs to tap changer switch including replacement of unserviceable parts such as bakelite sheet, connecting rod with nuts, bolts and washers, HV lead duly taped, provision of glass sleeve of required size & length including necessary welding works for transformer of capacity upto 750 KVA complete all as specified and directed.

Supply only tap changer switch complete with handle for transformer of capacity upto 750 KVA.

M&L for painting of Distribution transformer of capacity upto 50 KVA to 750 KVA with two coats of smoke synthetic enamel paint (colour/shed decided by GE) externally after necessary preparation to surfaces including numbering SM/MES No. with white paint, etc complete all as specified and directed.

Providing the cable fault locating Machine with necessary T&P at site for locating exact pin point of fault along with the length of armourd 6.6 /11 KV XLPE/PILCA insulated HT cable complete all as required and directed at site.

M&L for dismantling of existing VCBs/RMU by disconnecting HT incoming and outgoing cables, disconnecting of earthings, and complete acessories and shifting the same to another location including providing transportation from one sub station to another substation and fixing, connecting, commissioning and testing the VCB/RMU at new location as directed by making all arrangements at new location and connecting the incoming and outgoing cables as required and connecting the earthings etc and connecting the DC supply as well as AC supply for functioing of VCBs/RMU including overhauling of VCBs and making functional complete all as specified and directed by Engr-in-charge at site. Note : Spare parts required for making functional the VCBs if required shall be measured and paid seperately under relevant item of BoQ.

S&F in replacement Feeder Pillar Box (FPB) factory made -out door type made out of MS sheet (CRCA) of thickness not less that 3.15mm. of size 150x65x90cm with copper bus bar strip 3 Nos of size 130 cm in length 4 cm in width and 05mm in thickness suitable for 11000 volt mounted on HT porcelain insulator front opening door two leaf braced with hinged, mounted on 4 Nos of angle iron 50x50 mm duly welded with box and grouted in PCC block of size 30cmx30cmx 15cm in concrete 1: 3 : 6. Top of box MS sheet duly bent in/slope, tapper with projection of 30 mm on all side, weather/vermin proof with high quality of rubber beeding on panel door, cable entry arrangements at bottom includes earthing terminals 2 Nos at both side and painted with smoke grey stove enameled paint 2 coat over a primer coat all as directed.

Re - stretching only existing ACSR of any size on HT/ LT pole including binding the ACSR with insulators, aluminium binding wire complete all as specified and as directed. Note : (i) One length shall be measured for complete span of 4/5/6 conductors & GI wire.

Trimming of tree branches Clearing of LT/HT line 4 m all around by cutting tree branches at ground level of any numbers and any girth on any numbers of conductors/earth wire complete all as specified and directed.

General Note:-Unit rate(s) qouted by the contractor for Item(s) "in replacement or in repairs" shall be deemed to be included for dismantling / taking down or up carefully existing item(s) and removing the old unserviceable or serviceable or partly serviceable materials from site, which shall be sold to the contractor as per "Schedule of credit' and shall be the properity of the contractor. No claim whatsoever as to the quality of old retrieved material shall be entertained on this account.

M/s Yash Electrical and Maintenance

AUTOMATION AND SWITCHGEAR PANELS

Anil Builders