Repair and Maint and servicing of HT Eqpts, Breakers and connected items under GE Brichgunj, Sri Vijaya Puram

Amount

Material and Labour for repair and overhauling of HT 11KV vertical Air Break switch, Outdoor type by cleaning the contacts, applying grease and replacement of defective unserviceable spare parts for easy operation on ground level complete all as specified and as directed. Note :- (i) All spares required to be replaced shall be measured and paid separately under relevant items of this schedule. ii) Minor items like nut, bolts, washers etc are deemed to be included in the quoted rate.

Supply only Male contact/Moving contact blade suitable for 11KV complete all as specified and directed.

Supply only Female contact/Fixed contact Jaw suitable for 11KV complete all as specified and as directed.

Supply only MS jumper carrier complete all as specified and as directed.

Material & Labour for Earthing complete with galvanised iron earth plate electrode of size 60cmx60cm× 6mm thick, buried directly in ground vertically at a depth not less than 2.25 metres deep below normal ground level with top edge of the earth plate not less'than 1.5 metres below normal ground level and surrounded from all sides by 15cm thick and packed layer of charcoal dust and common salt filling in alternate layers and electrode connections by using galvanised iron strip of size 32X6 mm by means of bolts, nuts, check nuts and washers made up of galvanised iron or steel and protected by light grade 40mm dia galvanised iron pipe connected to main switch board or main control board and GI pipe light grade 20mm bore for watering including funnel, wire mesh, RCC pit cover and PCC chamber pit with PCC 1:2:4 type B-2 (including necessary excavation and earth work, disposal of surplus soil to a distance not exceeding 50 mtr all as specified and as shown in electrical plate No. 3 connected to test point terminal all as specified including taking down old earthing & testing new earthing on completion all as directed. Note:-(a) The unit rate shall include for protection pipe, GI water pipe, wire mesh, funnel, excavation, RCC pit cover, PCC chamber pit, test point terminal block, 32X6 mm dia GI strip from top of earth plate upto 5 mtr above ground level, if GI protection pipe is less than 5 meters, no price adjustment shall be made.

Material and Labour for decarbonsing/cleaning complete HT panels board, 11 KV cubicle type, consists of bus bar chamber, circuit chamber and metering chambers, by opening the spout/bus covers inspecting the bus bar joints, cleaning of bus bars, checking the bus bar spouts and circuit spouts for any flash overs/tracks, applying Becktol (red) solution to the bus bars and spouts having moderate tracking, applying HT insulated red compounds/Monoplist compound at the bus bar joints after tightening of joints, cleaning of bus bar insulators and bus bars with CTC and ensure proper decarbonisation and re-assembling complete all as directed by Engineer-in-Charge.

Material and Labour for decarbonsing/cleaning the cable compartment of Ring Main Unit 3 Way, 11 KV, consists of End joints,Current transformers, cable boots, bushings, by opening compartment cover by carefully switching off the main input cable supply and necessary switching ON of Earth switch of RMU thereby inspecting the end joints, current transformer, bushings and cable boots, checking the bushings for any flash overs/tracks, applying Becktol red solution to the bushings having moderate tracking, applying suitable HT insulated tape over anti tracking tube to prevent further tracking on, cleaning of end joints, CTs & cable boots with CTC and ensure proper decarbonisation and re-assembling complete all as directed by Engineer-in-Charge.

All as per item No. 7 above but of RMU 4 Way

All as per item No. 7 above but of RMU 6 Way

All as per item No. 7 above but of RMU 10 Way

All as per item No. 7 above but of RMU 1 Way

M& L for servicing and testing of HT vacuum circuit breaker of capacity up to 1250A, of any make, 33 KV, comprising of the following to the entire satisfaction of Engineer-in-Charge. Note: Quoted rate is inclusive for the following services:- (i) Checking the serviceability of the following parts carefully including cleaning, adjustments and re-assembling the unit complete. (ii) Checking the spring charging mechanism of the VCB, checking the operations of the closing/tripping trough closing/tripping coils electrically as well as manual charging including cleaning adjustments complete for the following. (iii) Checking the condition of the spring charging motor along with gear box including servicing to the motor commulator bushes, lubrication of bearing surfaces etc. (iv) Cost of additional hardware like, bolts, nuts , washers and spring washers, petrolium jelly ctc, to put the breaker in serviceable condition is deemed to be included in the rates quoted. (v) Making functional by carrying out minor repairs all the non functional circuits and indicating system like VCB Trip, CB ON, CB OFF, CB Service, Spring Charging etc (vi) Test shall include IR, CRM, time Test and all relevant routine test at site including submission of test reports by OEM/Authorized agency to the Eng-in-Charge .

Taking down the HT vacuum circuit breaker of capacity up to 800A, of any make, 11 KV, for servicing and re-assembling complete, comprising of the following including testing and commissioning to the entire satisfaction of Engineer-in-Charge. Note: Quoted rate is inclusive for the following services:- (i)Taking out the VCB from the enclosure & checking the serviceability of the following parts carefully including cleaning, adjustments and re-assembling the unit complete. (ii) Cleaning the external surface of bushings with CTC/CRC or Liquid ammonia to remove the accumulation of dirt or any other deposits. Inspection of bushings and make sure that vibration due to breaker operation have not caused the bushings to move resulting misallignment of contacts. (iii) Checking the breaker bushing of bus bar and circuit side inspecting the interval surface carefully for any charging/trackings,replacement of bushings. (iv) Dismantling the spring charging mechanism of the VCB, checking the operations of the closing/tripping trough closing/tripping coils electrically as well as manual charging including cleaning adjustments complete for the following. (v) Checking the condition of the spring charging motor along with gear box including servicing to the motor commulator bushes, lubrication of bearing surfaces etc. (vi) Cost of additional hardware like, bolts, nuts , washers and spring washers, petrolium jelly ctc, to put the breaker in serviceable condition is deemed to be included in the rates quoted. (vii) Making functional by carrying out minor repairs all the non functional circuits and indicating system like VCB Trip, CB ON, CB OFF, CB Service, Spring Charging etc (viii) Test shall include IR, CRM and time test submitting report by OEM/Authorized agency to the Eng-in-Charge.

Supply & fix in repairs spring charging motor suitable for operating in 240 V AC supply to be fixed in 11 KV VCB all as specified and as directed. Make : as per existing OEM as approved by GE

Supply & fix in repairs anti pumping relay 30V DC for VCBs all as directed and as specified.

Supply & fix in repairs Trip circuit coil 30V DC suitable for 11 KV Siemens/ Crompton make VCBs of all as directed and as specified.

Supply & fix in repairs Trip circuit coil 30V DC suitable for 33 KV Siemens/ Crompton make VCBs of all as directed and as specified.

Supply & fix in repairs space heaters 230 V, 80/100 W suitable for fixing inside VCB chamber along with necessary wiring for all as directed and as specified.

Supply and fix in repairs thermostat for space heaters of range 30- 110 degree suitable for fixing inside VCB chamber including wiring all as directed and as specified.

Supply and fix in repair Trip Neutral Close (TNC) Circuit breaker control Switches with 2 NO+ 2 NC contact arrangement of 25 A rating all as directed and as specified.

Supply and fix in repairs right angled cold applied cable boot suitable to cover the end connections of HT cable of size 95 Sqmm 3 core connected to 11 KV, 630 A Siemens Make 8DJ HST Model RMU all as directed and as specified.

Caliberation of Micro processor based numerical relay/ differential relay 11kv/33Kv by conducting primary injection on rescpective CTs and secondary injection tests on relays,checking of current transformer including CTR Ratio, IR Value, CT Secondary Resistance Measurement Test, rectifiation of defects in control wiring for proper tripping of circuit breakers through CTs, relays and tripping coils,adjustment/setting of the relay to restrict fault to upstream breakers,re-installation of the relay in circuit complete all as specified and as directed. NOTE:- (a) The contractor shall provide necessary testing kits, testing equipments,tools etc and shall also prepare the detailed test reports panel wise duly bound and submit to the department. Rate for the kits and equipment is deemed to be included in rate quoted. Testing and turning shall be carried out in the presence of Engineer-in-Charge to the satisfaction of department, failing which payment for the above item will not be made to the contractor. No claim from the contractor be enterained on this account. (b) Rate is inclusive of setting the parameters in differential relay and connecting after carrying out necessary polarity tests etc

S & F in repairs of cell 3.6V DC, lithium -1/2 AA size (ER 14250) suitable for C&S make (CSPR- V5 model) protection relay fixed in RMU all as directed and as specified.

S & F in repairs hinges of door suitable for Siemens model 8DJHST RMU after removing the old broken hinges all as directed and as specified

Supply and fix in replacement 3 pole Power contactor of 9 Amps Rating with 1 NO and 1 NC with coil voltage 110 V AC including Add On blocks with2+2NO & NC including necessary wiring and DIN Rail all as directed and as specified.

Supply and replace the HT PT fuses of porcelein insulated 11/12 KV, breaking capacity 45 KA, 3.15 Amps rating capacity all as direcetd.

Supply and fix in repair SMPS suitable for AC 230V, 50Hz as input and DC 110V, 1A as output with overload/ over voltage and Short Circuit Protection including mounting on Panel all as directed and as specified.

Supply and fix in replacement 11 KV single phase current transformer (CT's) resin cost suitable for out door VCB /RMU conforming to IS-2705, VA burden - 15VA, class of accuracy - 0.5/5P-10, three core type of CT as per existing with CTR100/1-1A complete all as specified and as directed.

Supply, Fixing in replacement and Testing of PT Assembly, 11 KV Grade, Dry Type suitable for 800 A VCB, Class 0.5 capacity 100 VA, 11000 / √3 / 110 / √3 insulation level 12 / 28 / 75 KV, Voltage Factor 1.2 continuous etc. including taking down of old and unserviceable PTs from VCB Panel etc. complete all as directed by Engineer-in-charge.

Material and Labour for replacement of Dial type 100mm dia oil temp meter suitable for 100 KVA to 400 kVA,11KV/ 433V transformers complete all as specified and as directed.

S & F in replacement maintenance free Battery for RMU 12V, 7Ah capacity all as specified and as directed.

S & F in repairs of cell 3V DC, lithium (CR 2/3AZ) 1600mAh suitable for Siemens make protection relay fixed in RMU all as directed and as specified.

S & F in repairs of cell 3.6V DC, lithium (ER14505) min 2000mAh suitable for fault passage indicator(FPI) fixed in RMU all as directed and as specified.

Supply and fix in replacement epoxy LV bushing suitable for 1000 KVA Step up transformer of Make CG with copper bus bar after taking proper shutdown of transformer, disconnecting the cables, draining out the Transformer Oil in barrels, opening the top cover all as specified and as directed Note: a) The quoted rate is inclusive of connecting back the top cover, Filling the drained transformer Oil, connecting back the cables and checking for any leakages. (b) Gaskets required (if any) shall be deemed to be included in the quoted rate.

Material and labour for lightning arresters (set of three) expulsion type, complete with all fittings, transmission class discharge capacity 65 Kilo amps, 33000 volt grade on structures with suitable arrangement complete all as specified and directed including removing the unserviceable 33KV lightning arrestor.

Supply and replacement of unserviceable rubber matting with new one of 3mm thick 1M X2 M HT ISI marked complete all as specified and directed by Engineer -in-Charge

M&L Glow sign board (Bakelite) details of sub stations of letters size 100mm on flexy (1500mmx1500mm) with vinyl digital cutting and pasting with suitable tube light fitting including chokes and electrical connections complete all as specified and directed by Engineer-in-Charge.

Supply and fix in replacement 11 KV single phase current transformer (CT's) conforming to IS-2705, VA burden - 15VA, class of accuracy - 0.5/5P-10, three core type of CT as per existing with CTR 200-100/5-6A complete all as specified and as directed. Note :Test report shall be submitted by OEM/Authorized agency .

Supply and fix Aluminium conductor steel reinforced (ACSR) of any type including binding with and including suitable size of binding wire/ crimping lugs of suitable size/connecting to clamps with suitable GI bolts, nuts and washers complete Including dismantling and taking out worn out ACSR conductor from 33 KV yard all as specified and as directed

M & L for Servicing to air-break switch /isolator off load, rotating type, 33 KV, of 600 Amps capacity , with proper alignment of isolator rotating blades with fixed contact jaws, arcing horns, applying petrolium jelly to moving mechanism, cleaning and lubricating to isolator control assembly, tightening all nuts/bolts of isolator assembly and clamps of jumpers etc, repairing to isolator control assembly and making in proper serviceable condition for smooth functioning, testing and commissioning on load complete all as specified and directed.

Supply & fix in repairs male /moving contact / rotating blade of HDE copper silver plated of air brake off load isolator switch rotating type 33 KV, of 600 Amps capacity with all fixing nuts bolts etc.

Supply & fix in repairs fixed female contact made of HDE copper silver plated of air brake off load isolator switch rotating type 33 KV, of 600 Amps capacity with all fixing nuts bolts etc all as specified and directed.

Repair / Servicing / maintenance of transformer 11 / .433 KV indoor / outdoor type , plinth mounted type including the following work services :- (a) Disconnecting transformer from electric system and providing electric power to user from alternative arrangement including taking out from existing position . (b) Decanning of transformer oil , opening top cover , disconnecting of all internal connections , lifting and taking out of core assemble , LT / HT bushes, Tap changer etc ,cleaning and inspection of core and winding , segregation of serviceable and unserviceable items , removing of sludge and cleaning tank and cooling pipes / fins /tanks and drying the tank complete. (c) Replacinig unserviceable LT / HT bushing by replacing rubber / cork oil seals and damaged terminal rod & replacement of Transformer cover gasket of rubber cork sheet. (d) Re installation of TFR including reassembling of core / winding assebly complete including replacement of unsv parts , repair the defective parts and tighting of all loose / sparks wire / nut bolts etc and refixing the to the existing position , connecting with HT/LT cables and earthing strip and testing complete including necessary Transportation ( If required ) to the work shop and back and including Dehyderation and refilling of existing or new transformer oil of required quantity . (NOTE FOR ITEM :- (i) Dehydration of oil and new Transformer oil shall be measured seperately . (ii) Transportation of TFR measured and paid seperately . (iii) HT & LT Bushing , Tap Changer will be measured & Paid separataly. (iv) In case HV / LV Winding faults, winding shall be made serviceable with new winding and the same will be measured and paid seperately. (v) The rate of cork sheet & Packing Material for following cap of TFR are included in quoted rate of transformer capacity upto 160 KVA

As Per Item No 46 above But capacity 200 to 300 KVA .

As Per Item No 46 above But capacity 315 to 400 KVA .

Supply & fix in repairs of transformer HT bushing porcelain with copper stud, nuts, bolts, washers, gasket, oil seal suitable for outdoor type Transformer of capacity upto 160 KVA .

As Per Item No 49 above But capacity 200 to 300 KVA .

As Per Item No 49 above But capacity 315 to 500 KVA .

Supply & fix in repairs transformer LT bushing porcelain with copper stud/ Bar, nuts, bolts, washers, gasket, oil seal suitable for indoor/outdoor type Transformer of capacity upto 160 KVA . Complete all as directed.

As Per Item No 52 above But capacity 200 to 300 KVA .

As Per Item No 52 above But capacity 400 to 500 KVA .

Material and Labour for Lifting the transformer from its plinth / pole structure inside the fence area with the help of suitable crane and transporting to workshop for carrying out necessary repairs and bringing back and re-installing in its original place complete all as specified and directed by Engineer-in-Charge for the following capacity of transformers:- (Note : Repairs required shall be measured and paid separately under relevant items of items) up to 160KVA

As Per Item No 55 above But capacity 200 to 300 KVA .

As Per Item No 55 above But capacity 400 to 500 KVA .

Taking out complete core from transformer, cutting and removing burnt out winding [primary (HV) and secondary the same with super enameled copper conductor of existing gauge together with insulation materials, applying varnish, pre-heating in heating chamber, re-assembling the transformer as per the original and testing on completion complete all as specified and directed by Engineer-in-Charge for distribution transformer of capacity up to 500 KVA of any make of any make.

Taking out complete core from transformer, cutting and removing burnt out winding secondary (LV)] and re-winding the same with super enameled copper conductor of existing gauge together with insulation materials, applying varnish, pre-heating in heating chamber, re-assembling the transformer as per the original and testing on completion complete all as specified and directed by Engineer-in-Charge for distribution transformer of capacity from 501 KVAto 1000KVA of any make of any make. Note ;Test report shall be submitted by OEM/Authorized agency Item sl no 58 to 59.

Supply and fix Colour coding as R ,Y ,B sleeves for ACSR conductor for 33kv yard complete all as specide dand as direted.

supply and Filling fresh new EHV grade-II for topping up transformer oil duly filtered, ISI marked as per IS:335/93 with amdt. No.1 (Reaffirmed : 2005) dehydrated to give BDV value not less than 50 KV when tested with 2.5 mm gap electrode complete all as specified and as directed.

M & L for Online Filtration of transformer oil including checking Dielectric strength before and after filtration of oil for transformers located in Brichgunj area with suitable equipment having filtration, heating and pumping facility to improve the dielectric strength / insulation value of transformer oil complete all as specified and as directed. Note : Dielectric strength of transformer oil after filtration/dehydration shall not be less than 50 KV. Oil for topping up shall be measured and paid for seperately as supply only under relevant items of this schedule.

Material and Labour repairs in replacement of earthing complete with Copper earth plate electrode 60 x 60 cm x 3 mm thick buried directly in ground ( earth pit not less than 2.25 M deep below ground level) with top edge of the plate not less than 1.5 Meter below normal ground level connected to Copper strip of 32x6 mm as main earthing lead (upto 7.5 m length from earth electrode to test point) by means of galvanised iron or steel bolts, nuts , check nuts & GI washers and GI tubing 40 mm bore light grade for earth lead protection up to main earth test point and including concrete pit in PCC (1:3:6) type C1, pre cast RCC (1:2:4) type B1 as in cover slab 54 x 54 x 5 cm including 8mm dia MS TMT bars @ 150 mm c/c as in reinforcement with one handle for lifting made out of 8 mm dia MS bar, wire mesh, 20 mm bore GI tubing (Light Grade) for watering and funnel, charcoal or coal and salt in alternate layers including excavation earth work in any type of soil, RFR and removal of surplus soil complete all as specified and directed electrical plate No. 3 of SSR part - I complete all as specified and as directed.

Material and Labour in repair epoxy resin cost current transformer, indoor type suitable for rated system voltage 11 KV, CT ratio100 50/ 1-1-1A Buvden 10KVA accuracy class 0.5 system frequency 50 Hz Indoor type suitable for VCB/RMU as per site requirement, all as specified and directed by Eng-in charge including taking out the old CTS

Material and Labour in repair epoxy resin cost potential transfarmer including taking out the old unserviceable PT, suitable for rated system voltage -11 KV, three phase, PT ratio 11000/√3/110 /√3V,burden 15KVA,Accuracy class 0.5, system frequency 50Hz, suitable to install in existing VCB/RMU as per site requirement, all as specified and directed by Eng-in-Charge.

Material and Labour in repair ,battery cells of float cumboost battery charger 36v-40 Amps -6F singal phase all as specified and directed by Eng-in-Charge.

excellent Enterprises (BID ID -3493488)

M/s Gurunath Construction (BID ID -3496937)