REPAIR / MAINT HT DISTR SYSTEM, TRANSFORMER AND VCB / RMUS, RELAYS AND OTHER CONNECTED WKS AT INS CIRCARS, HQ ENC, NCN CIRCAR AND OTHER ALLIED AREAS UNDER AGE E/M NO-I OF GE(U-I) VISAKHAPATNAM

Amount

NOTES / INSTRUCTIONS FOR STRICT COMPLIANCE :- (a) The contractor shall obtain sample approval for all materials incorporating in the work as per condition 10 of IAFW-2249 and Special Condition 11 of tender document mentioned here-in-after. (b) The Engineer-in-charge may direct the contractor in writing to procure and deposit up to 50% quantity of the material with in 30 days from the date of commencment as required at site out of quantity to complete the scope of work. Remaining 50% shall be procured as per site requirement during progress of work.The decision shall be final and binding on the contractor. (c) The contractor shall deposit the procured material to the store of concerned subdivision within 30 days from the receipt of written direction. Failing which contractor shall liable to pay a penal recovery of Rs. 5000/- per week, levied on the dues of contractor, subject to maximum up to 10% of the work done/CA Amount whichever is higher. (d)The contractor shall obtain approval of “Qualified Tradesman” as per condition 26 of IAFW-2249 before commencement of work at site and shall have sufficient manpower such as Electrician / FGM / Technician etc., readily available to meet the site requirement during emergency situation as per directions of Engineer-in-Charge. (e) The quoted rates shall be inclusive of cost of necessary Tools, Plants, Safety Equipments, Machinery etc., as per site requirement.

Excavation in trenches, not exc 1.5 m wide and not exc 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, laying cables etc. n exc 10 sq m on plan and n exc 1.5 m in depth and getting out in soft / loose soil complete all as specified and directed.

Returning, filling in and including spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick complete all as specified and as directed.

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

M&L sand cushioning with clean and dry rever sand in trenches for protection of UG cable and including punning down complete all as specified and directed. Note:- Punned thickness of sand coushioning shall only measured and paid.

Supplying and laying un-reinforced precast concrete cable cover, class HV, Type 1, flat, of size 300mmx 180mm x 40mm, laid along alignment of cable as protection to cable in trenches including taking out existing un-serviceable cable covers complete all as specified and directed.

S&F 100 mm bore dia galvanised steel tubing, Medium grade galvanised, laid under road crossing, for cable protection or fixed to poles, walls or laid under floors including taking down existing un-serviceable pipe of any description complete all as specified and directed.

Supply & laying XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 volts, Earthed, grade cross sectional area 300 Sqmm, 3 core, laid in trenches / duct / on pole / on wall complete all as specified and directed.

All as per Sl item No. 8.00 here in before but cable of size 240 sqmm

All as per Sl item No. 8.00 here in before but cable of size 185 sqmm

All as per Sl item No. 8.00 here in before but cable of size 95 sqmm

Taking out existing un-serviceable UG XLPE / PVC insulated armoured / un armoured PVC sheathed Cable of any size in underground / alongwith pole / on wall or in any positon complete all as specified and as directed. Note:- Excavation and earthwork (if required) shall be measured and paid separately.

Re-laying only old servicable (cable obtained from taking out old cable here-in-before after checking the fault) UG LT XLPE electric cable with alumimium conductor, 1100 volts grade of any size, laid in trenches / duct / on pole / on wall / roof / laid on floor complete all as specified and directed. Note:- Excavation and earthwork (if required) shall be measured and paid seperately.

M&L for cutting the tarmac / hard standings in road and excavating trenches across the road in size not exceeding 0.45 m wide and 0.6 m depth for laying cable / cable protection pipe including refilling earth & making good top surface of the disturbed portion with 100mm thick PCC 1:3:6 (using 40mm graded stone aggregate) / bituminous mix as per existing & matching with the surroundings including removal of rabbish to distance not esceeding 100 m complete all as specified and directed.

S & F synthetic rubber insulated mats 3 mm thick for voltage upto 33 kv for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m including taking down existing mat complete all as specified and directed.

S&F danger notice plate of size 25 x 20 cm & 1.6mm thick mild steel sheet, vitreous enameled white, with letters, figures and conventional skull and bones in signal red colour and fixed with M.S. clamps, bolts and nuts of approved size for HT including taking down existing un-serviceable notice plate complete all as specified and as directed.

M&L cable jointing kit for 11 KV (Earthed) grade 3 core XLPE armoured aluminium conductor cable of size 120 to 185 sqmm for outdoor end termination, heat shrink type joint complete with jointing material and accessories including taking down existing joint complete all as specified and directed. Note:- (i) The cost of Disconnecting and reconnecting the cable with HT network is deemed to be included in the unit rate quoted against this item. (ii) The cost of re-arranging the cable if needed is deemed to be included in the unit rate quoted against this item.

All as per Sl item No. 17.00 here in before but for Indoor termination of cable of size 95 sqmm

All as per Sl item No. 17.00 here in before but for Indoor termination of cable of size 120 to 185 sqmm

M&L cable jointing kit for 11 KV (Earthed) grade 3 core XLPE armoured aluminium conductor cable of size 120 to 185 sqmm for straight through, heat shrink type joint with jointing material and accessories including taking down existing one complete all as specified and directed. Note:- (i) The cost of excavation is deemed to be included in the unit rate quoted against this item. (ii) The cost of taking down of old joint in case fault with existing joint is deemed to included in the quoted rate.

All as per Sl item No. 20.00 here in before but for cable of size 240 to 400 sqmm

M&L for calibration and testing of combined inverse time over current and instantaneous IED relay, checking and cleaning / decarburizing its moving and fixed contacts and ensure physical healthiness with visual check for healthy tripping of over current and earth fault, adjusting tripping time, flag setting, ratio setting, instantaneous time setting etc as per installed capacity of transformer to be saved on maximum, short circuit current in accordance with percentage impedance of transformer with artificial current injection on primary side & secondary side with current injection test set on HT Switchgear, complete all as specified and directed by Engineer-in charge. Note :- (i) Spares / meters shall be measured and paid separately. The job of calibration & setting shall be done in presence of MES rep / concern JE. Contactor shall provide the necessary test report of calibration done to department before claiming the payment. (ii) Contractor shall provide all testing equipment, T&P and injection kit for testing and creating the artificial fault for testing the proper functionality of relays and instruments on designed settings & unit rate quoted against this item shall be considered to include all these aspects. (iii) Necessary test report of calibration shall be submitted by the contractor to Engr-in-Charge before claiming any payment against this item. (iv) The cost of manpower, HT tape used for opening and reconnecting cable is deemed to be included in the unit rates quoted. (v) The testing shall be carried out by auhtorised service engineer of OEM and approval of the same shall be taken from Engr-in-Charge.

M&L for Overhauling/Repair of 11 KV VCB with cleaning of all parts, adjusting contacts, checking epoxy body, drive insulator , spring charge mechanism, locking arrangements tripping coil circuits (closed/open) etc, checking all mechanical operations supporting insulators bush trolley auxiliary contact. Make female contact and check all wiring including minor item required for repair complete all as specified and directed. Note:- The cost of all minor Items like nuts, bolts, spring washers, HT Insulation tapes, petroleum jelly , CTC spray etc is deemed to be included in the unit price.

M&L for Overhauling / Repair of 11 KV VCB Panel with cleaning of all parts, checking & cleaning circuit all busbar spout bushings, CT/PT spout bushings, Busbar cleaning of CT and PT, checking all wiring & rectifying Wiring faults , cleaning metering chamber, applying mono plast compound at busbar joints , fixing up issues with measuring instruments etc including minor item such as nuts, bolts, copper wires, HT insulation tapes etc required for repair complete all as specified and directed. Note:- The testing/inspecting Engineer Should be minimum a State Govt License holder or any OEM authorised License Holder

S&F busbar/CT supporting insulator of rating 25KA of capacity 400 to 1250A, make as per OEM, suitable for 11kV VCB panel including taking down existing un-serviceable busbar complete all as specified and as directed.

S&F spring charging universal motor with gear box 220V AC of rating 400 to 1250A suitable for 11KV VCB & of make as per OEM including taking down existing un-serviceable motor complete all as specified and as directed.

S&F thermostat suitable for HT VCB of capacity 11 KV, make as per OEM suitable to operate on 230 Volts AC supply with necessary wiring and control cable with toggle switch including taking down existing un-serviceable thermostat complete all as specified and as directed.

S&F space heater suitable for HT VCB of capacity 11 KV, make as per OEM suitable to operate on 230 Volts AC supply with necessary wiring and control cable with toggle switch including taking down existing un-serviceable space heater complete all as specified and as directed.

S&F LED indication lamps, 110 V of various colours suitable for VCB including taking down existing un-serviceable indication lamps complete all as specified and as directed.

S&F programmable numerical inverse time over current / earth fault relay having IDMT / NI / VI / DT Curves with minimum time delay zero with respect to I>>, I>>>, Ie>>, Ie>>> settings, suitable for VCB of capacity 11/12 KV with all original / Retrofitting arrangements including taking down existing un-serviceable relay complete all as specified and as directed.

S&F epoxy resin body for switchgear any type of rating 400 to 1250 A, suitable for 11KV VCB panel & of make as per OEM including taking down existing un-serviceable epoxy resin body complete all as specified and as directed.

S & F Epoxy Resin Spout bushings for busbar single pole R/B phase, 400-1250 Amps, suitable for 11KV VCB panel & of make as per OEM including taking down existing un-serviceable bushings complete all as specified and as directed.

S & F Epoxy Resin Spout bushings for busbar single pole Y phase, 400-1250 Amps, suitable for 11KV VCB panel & of make as per OEM including taking down existing un-serviceable bushings complete all as specified and as directed.

S & F Epoxy Resin Spout bushings for CT/PT/Circuit spout single pole R/Y/B phase , 400-1250 Amps, suitable for 11KV VCB panel & of make as per OEM including taking down existing un-serviceable bushings complete all as specified and as directed.

S & F isolating contact any type of single pole incoming / Outgoing , 400-1250 Amps, suitable for 11KV VCB panel & of make as per OEM including taking down existing un-serviceable isolating contact complete all as specified and as directed.

S & F drive beam (Pair) suitable for 400-1250 Amps rating, 11KV VCB panel & of make as per OEM including taking down existing un-serviceable insulating cover complete all as specified and as directed.

S&F closing coil assembly, 110V DC suitable for 11KV VCB panel & of make as per OEM including taking down existing un-serviceable insulating cover complete all as specified and as directed.

S&F tripping coil 110V DC suitable for 11KV VCB panel & of make as per OEM including taking down existing un-serviceable insulating cover complete all as specified and as directed.

S&F T‐N‐C Switch (Breaker Control Switch) for control switches & control wiring, suitable for 11KV VCB & make as per OEM including taking down existing un-serviceable insulating cover complete all as specified and as directed.

S&F vacuum interrupter of rating 400A / 630A / 1250A suitable for 11KV VCB & make as per OEM including taking down existing un-serviceable insulating cover complete all as specified and as directed.

S&F bakelite HRC fuse base with carrier 32A, 415 V with HRC fuse 5 amps of make as per OEM including taking down existing un-serviceable fuse complete all as specified and as directed.

S&F buffer for opening spring suitable for 11KV VCB & make as per OEM including taking down existing un-serviceable buffer complete all as specified and as directed.

S&F buffer for closing spring suitable for 11KV VCB & make as per OEM including taking down existing un-serviceable buffer complete all as specified and as directed.

Labour / Technician only for identifying, diagnosing, tracing, checking & rectifying High Tension (11KV) faults, tracing location by meggering the lines, faults in panels, VCB`s, Transformers and other switchgears at any location, any time round the clock and rectifying it to restore the supply within time limit at various locations using appropriate fault locator, cable route locator etc complete all as specified and directed. Note:- 1. All the activities to trace the fault, rectifying & restoring the supply shall be carried out within specific reasonable time as directed by the Engineer-in-charge. 2. The cost of required tools (T& P), minor items such as lugs, nuts, bolts, HT insulation tape and safety equipments required for the job shall deemed to be included in the unit rate quoted against this item & nothing extra shall be paid to contractor by the department on these ground. 3. Safety of manpower deployed for the job is contractor’s responsibility. In case of any accident / Fatal injury, contractor shall be held responsible to settle all claims and nothing extra shall be paid to the contractor on this account. 4. The cost of all manpower (any number) for the job is deemed to be included in the quoted unit rate. 5. The cost of Fault identification by use of fault locator (if needed) is catered in separate Items. 6. Minimum one VCB / RMU technician, one Transformer Technician & one cable Jointer must be available round the clock during rectification process of fault if respective fault occurs.

M&L for detecting HT UG cable faults located in any stretch / depth with sophisticated cable fault locator consisting of microprocessor based pre-locator system, HV surge generator, fault pin point surge wave receiver, cable identification instrument , cable tracer for exact location of under ground cable routes complete all as directed. Note:- The rate quoted deemed to be inclusive of arrangement of necessary fault locator equipment, transportation of equipment & charges for service engineer.

S&F 11 KV CT, epoxy resin cast, dry type, indoor, 200/100 (primary) -5 + 5 A (Secondary) , with core 1, class 0.5, core 2 class 5P10 for fixing with spout bushing including taking down existing un-serviceable CT complete all as specified and as directed.

S&F 11 KV CT, epoxy resin cast, dry type, indoor, 100/50 (primary) -1 + 1 A (Secondary), with core 1, class 0.5, core 2 class 5P10 for fixing with spout bushing including taking down existing un-serviceable CT complete all as specified and as directed.

S&F 11 KV Fuse for Potential Transformer suitable for 11 KV VCB panel any type for each pole including taking down existing un-serviceable Fuse complete all as specified and as directed.

M&L for inspection, testing, servicing and overhauling of Factory Made 11 KV, 400-800 Amps, SF6 Insulated, Motorized, Outdoor RMU, 21 kA for 3 Seconds, Consisting of any nos Incoming and any nos Outgoing Feeders including following complete all as directed by Eng-in- charge :- (a) Preliminary inspection of 11 KV MV Switch gear for any defects. (b) Testing of CTs (c) Servicing Switch gear panels :- (i) Cleaning panel (ii) checking the condition of SF6 gas (iii) HV test. Notes:- (1) The GIS Switchgear servicing includes:- (a) Cleaning of GIS for dust, oxidising and decarburizing with CTC. (b) Repair/servicing of spring loaded operating mechanism. (c) Repair/servicing of spring charging motor. (d) Checking, repairing & servicing of gearbox, auxiliary switches, spring, limit switch etc complete. (e) Checking & repairing electrical and mechanical operations. (f) Lubrication all moving parts with petroleum jelly & cleaning all bushing insulators with CTC. (g) Tightening of all mechanical connections of mechanism. (h) Proper tightening all LV connection of VCB and cable chamber & allied connecting accessories. (2) The rate quoted shall be deemed to include for necessary T&P, nuts, bolts, washers, gasket, insulation tape, compound, painting of RMU panels with approved colour including lettering details all as per existing etc. (3) Major spares will be measured and paid separately under relevant items of BOQ, however the unit rate quoted against this item shall be deemed to include for any other minor spares requiring replacement.

S & F circuit-breaker trip coil kit 24 Vcc/Vdc suitable for 11KV, 400 to 800 Amp RMU & of make as per OEM including taking down existing un-serviceable circuit-breaker trip coil kit complete all as specified and as directed.

S & F circuit-breaker closing coil kit 24 Vcc/Vdc suitable for 11KV, 400 to 800 Amp RMU & of make as per OEM including taking down existing un-serviceable circuit-breaker closing coil kit complete all as specified and as directed.

S&F motor for motorized mechanism 24 Vcc/Vdc suitable for 11KV, 400 to 800 Amp RMU & of make as per OEM including taking down existing un-serviceable motor complete all as specified and as directed.

S & F VPIS Standard, 3.3 to 7.7 KV suitable for 11KV, 400 to 800 Amp RMU & of make as per OEM including taking down existing un-serviceable VPIS complete all as specified and as directed.

S&F Heat resistor for I switch operating Mechanism from RMU & of make as per OEM including taking down existing un-serviceable heat resistor complete all as specified and as directed.

S&F Heat resistor for D/B circuit breaker operating Mechanism from RMU & of make as per OEM including taking down existing un-serviceable heat resistor complete all as specified and as directed.

S&F RMU operating Handle Big size from RMU & of make as per OEM including taking down existing un-serviceable handle complete all as specified and as directed.

M&L for taking down existing un-serviceable 11KV, 400 to 800 Amp RMU, transporting to workshop from sub station (OEM Factory), opening including filling of SF6 gas, re-assembling by authorised technical rep of OEM, bringing back to site safely and re-installing, testing and commissioning the same complete all as specified and directed. Note:- (i) The unit rate qouted against this items shall be deemed to include cost of transportation of RMU for both sides. (ii) Th cost of SF6 gas shall be measured and paid and seperately under relevant Item.

M&L for testing of HT 11KV VCB 630A/800A complete for hypotest using isolation transformer, variac etc at any location by injecting high voltage breaker opening / closing timing time testing and tuning of vacuum interrupters and all contacts, current carrying parts, testing and tuning of rotating mechanism, insulation test, micro ohm test with suitable test kits, tool and instruments , test report to be signed by contractor, JE, Engeer-in-Charge & countersigned by GE complete all as specified and directed by the Engineer-in-Charge. Note:- The servicing shall be carried out by auhtorised service engineer of OEM and approval of the same shall be taken from Engr-in-Charge.

M&L for isolating the HT supply of outdoor type transformer of capacity 100 to 750 KVA, disconnecting HT and LT connections by opening clamps, bus bar extension and isolating the cables, keeping all the cables out from the HT/LT sides, physically checking of transformer for healthiness such as checking pressure release valve, oil condition etc. and performing transformer tests such as HV/LV megger test, ratio test, magnetic balance test, checking the lead condition from winding to bus rods, necessary soldering / jointing etc complete all as specified and as directed. Note:- (i) All testing shall be done in presence of Engr-in-Charge or his accredited rep and test reports shall be signed by contractor and Engr-in-Charge and kept on record. (ii) If the transsformer found satisfactory then HT/LT connections, assembly etc shall be done by the contractor and transformer shall be charged. (iii) If the transformer fails in these tests then the contractor has to shift the transsformer for winding / overhauling which shall be measured and paid separately. (iv) Cost of winding / overhauling if required shall be measured and paid separately. (v) The cost of Transportation of Transformer to & from the workshop if needed is deemed to be included in the unit rates quoted.

M&L with replacement of 6mm thick synthetic rubberized cork sheet gasket for top cover, HT/LT bushes for transformer of capacity 100 to 750 KVA including tightening all the bushings and top cover to avoid any oil leakages complete all as specified and directed.

S&F off load tap changer assembly suitable for transformer of capacity upto 750 KVA as per existing with 5 tapping position including opening top cover, conservator etc including taking down existing un-serviceable tap changer complete all as specified and as directed.

Shifting of standby Transformer of any capacity from any sub station to within 5 km, closing the transformers for loading into transporting vehicle with the help of crane, transportation to another site, unloading, including disconnecting and removing of existing faulty transformer and installation of standby transformer, making necessary HT/LT connections, earth connections and restoration of power supply including all T&P required complete all as specified and as directed.

M&L earthing complete with galvanised steel earth plate electrode of size 600 x 600 x 6 mm thick buried directly in ground in vertical position (earth pit not less than 2.25 m deep below the normal ground level) with top edge of the earth plate not less than 1.5 m below normal ground level, connected to earth lead of galvanised iron strip 32 x 6 mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel, all as shown in electrical plate No. 3 connected to earthing test point including dismantling un-serviceable earthing complete all as specified and directed. Note:- The unit rate shall also include for earth work in any type of soil, PCC 1:3:6 type C1 chamber, RCC 1:1.5:3, type A1 cover slab, 50 mm thick reinforced with 8 mm dia TMT bar @ 140 mm C/C both ways, 10 mm dia plain bar lifting handle embedded in cover slab, Main earthing lead from earth electrode to test point upto 7.5 m length, 20 mm bore medium grade GI watering pipe, 40 mm bore GI medium grade earth lead protection pipe, funnel, wire mesh, copper lugs, charcoal and common salt in alternate layer etc.

Supply and topping up of transformer oil with di-electric strength not less than 60 KV in 2.5mm rod gap into the conservator tank / body tank of the transformer / OCB / FRMUs etc at various locations complete all as directed by the Engineer-in-Charge.

Filtration of transformer oil of transformers / FRMUs installed at various locations to achieve di-electric strength not less than 60 KV at 2.5mm gap as per relevant IS with portable filtration plant, testing of the oil for the di-electric strength before filtration and after filtration complete all as directed by the Engineer-in-Charge.

S&F brass spindle / studs for terminal on HT side threaded complete with nut, washers etc of suitable dia for transformer capacity of 100 - 400 KVA including taking down existing un-serviceable brass spindlecomplete all as directed by the Engineer-in-Charge.

All as per Sl item No. 67.00 here in before but suitable for 500 to 750 KVA transformer

S&F brass spindle / studs for terminal on LT side threaded complete with nut, washers etc of suitable dia for transformer capacity of 100 - 400 KVA including taking down existing un-serviceable brass spindle complete all as directed by the Engineer-in-Charge.

All as per Sl item No. 69.00 here in before but suitable for 500 to 750 KVA transformer

S&F silica gel breather assembly complete suitable for 100 to 400 KVA transformer as per existing with breather unit and silica gel including connecting with proper necessary gaskets if necessary including taking down existing un-serviceable breather assembly complete all as directed by the Engineer-in-Charge.

All as per Sl item No. 71.00 here in before but suitable for 500 to 750 KVA transformer

Supply and replacement of silica gel in breather of transformers all as specified and as directed.

S&F HT bushings made out of porcelain, as per existing and suitable for distribution transformer of capacity 100 to 400 KVA including taking down existing un-serviceable bushingscomplete all as specified and as directed.

All as per Sl item No. 74.00 here in before but suitable for 500 to 750 KVA transformer

S&F LT bushings made out of porcelain, as per existing and suitable for distribution transformer of capacity 100 to 400 KVA including taking down existing un-serviceable bushingscomplete all as specified and as directed.

All as per Sl item No. 76.00 here in before but suitable for 500 to 750 KVA transformer

M&L for preparation of old exposed painted surfaces of indoor / outdoor type transformer of capacity 100 to 400 KVA and painting the same with two coats of synthetic enamel paint including writing details of transformer on transformer plinth / base with white synthetic enamel paint on black synthetic enamel paint back ground complete & including one coat of white wash on exposed surface of transfomer plinth / base complete all as specified and as directed. Note :- Colour of paint shall be as decided by Engr-in-Charge.

All as per Sl item No. 78.00 here in before but 500 to 750 KVA transformer

M&L for rewinding of distribution transformers of any capacity / size / type by strip opening & rewinding the HV coils (i.e. primary coils) from core assembly safely, removing old defective insulation paper, re-winding the coils with new copper wire as per I.S. of same gauge and existing size together with new insulated materials / bracings before placing in to the transformer and assembling the coil with new DPC insulation and fitting the coils in the chamber, testing and commissioning the transformer and recording the test results complete all as directed.

All as per Sl item No. 80.00 here in before but for LV coils

S&F gun metal drain valves suitable for transformer of capacity 100 to 750 KVA including taking down existing un-serviceable drain valves complete all as specified and as directed.

M&L for disconnecting carefully electrical connection from both HT/ LT (primary & secondary) sides of the transformer, keeping them at safe side and taking the transformer out from the plinth with the help of crane, indoor/ outdoor type of capacity upto 750 KVA, 11 KV / 0.433 KV, step down any make for carrying out complete overhauling which shall comprise of the following:- (Contd...)

a) M&L for lifting, transporting, handling the transformer to workshop and opening top cover of the transformer by unscrewing nuts, bolts, washers etc. including disconnecting core assembly from HT/ LT bushing and lifting the same gently and taking out from the shell (container/ body) of the transformer. b) M&L for draining out transformer oil from the above said transformer in the suitable capacity of container / drums and keeping it in safe custody for reuse. c) M&L for cleaning the transformer body from inside, removing deposited dirt / sludge / foreign particles etc. from the bottom / body of the transformer with appropriate chemical solution and drying up the shell from inside before refilling of the transformer oil. d) M&L for cleaning and washing thoroughly core and windings of the transformer by hosing down with clean dry oil conforming to IS 335/1983, removing deposited dirt / sludge / foreign particles from the windings / core, thorough inspection of windings, providing insulations to leads and terminals, heating / drying / baking complete carefully and thoroughly inside the heating chamber at suitable temperature to obtain required value of insulation resistance etc. all as specified and as directed by Engr-in- charge. e) Lifting and re-fixing core assembly inside the transformer shell gently and carefully, connecting primary / secondary / Neutral connections to the bushings assembly, fixing of tap change over including tightening of nuts, bolts, washers of the core to reduce humming noise all as directed. f) Refilling the filtered transformer oil in the shell of transformer complete. g) Re-fixing the top cover including replacement of cork sheet / gasket 8mm thick, tightening of nuts / bolts / washers etc. and replacement of breather with silica gel crystal type all as directed by Engr-in charge h) Lifting / shifting to the place from where removed or to any location as directed and re-installing the transformer including connecting primary / secondary / neutral connections etc. all as directed by Engr-in-Charge. (Contd...)

j) The inspection of transformer shall involve:- i) Checking of all clamps, nuts, bolts including core bolts & cover fixing bolts. ii) Checking all brazing, joints, tap heads and connection joints. iii) Checking all jumpers, terminations / connections inside the transformer. iv) Checking the Buchholtz relay / conservator MOG if any. v) Painting complete with two coats of synthetic enamel paint externally transformer shell complete all as directed by Engr-in-Charge. (vi) Inspection of tap changer, checking the moving and fixed contacts for contact wear and connection to winding. k) Conducting the tests on core and windings as per IS like ratio, magnetic imbalance, short circuit etc. in presence of Engr-in-Charge and test results shall be signed both by the contractor and Engineer -in-Charge and kept on record. Note:- (i) Any damage to insulators / bushes / windings etc. while in the custody of the contractor shall be made good at no extra cost to Department. The serviceability of the transformer shall be checked and confirmed by the contractor before taking into his custody. (ii) M&L for rewinding / re-insulation of HT / LT (primary / secondary) coils, bushes, studs, Transformer oil, cable box, replacement of buchholtz relay / MOG if any etc will be measured and paid separately. (iii) Necessary gate pass duly signed by all concerned i.e JE, Engr-in-Charge & contractor should be taken while lifting / before taken in to costody of contractor foe handling workshop for repair. (iv) Guarentee / warrenty of the existing transformer to be verified by the Engr-in-Charge before lifting the equipment for repair. (v) Serviceable transformer Oil shall be duly certified by the Engr-in-Charge. (vi) Engr-in-Charge shall satisfy with serviceability of Transformer. No extra cost will be allowed for rectification of defect till expiry of defect liability period once carryout repairs of the transformer measured under this item.

S&F Plug in type Bushings 630 Amps for RMU of Schneider make at cable termination chamber including taking down existing un-serviceable bushings complete all as specified and as directed.

Supply & filling SF6 Gas in circuit brekers / RMU, duly brought in cylinders filled with SF6 gas, having universal type valve outlet suitable for filling gas in circuit breakers. The SF6 gas shall be free from impurities and toxic contents as per the relevant IS specifications & there should not be any contamination or introduction of impurities from defective manufacturing process, leakage or contaminations from containing cylinders complete all as specified and as directed. Note :- The empty cylinders shall be returned to contractor.

M&L for cable route indicator for HT UG cable, made out of 2mm thick MS sheet in round shape of dia not less than 200mm, embossed with HT Cable on it, bolted with 2 nut of suitable size at top of 35 x 3 mm MS flat iron of length not less than 800mm, painting with 2 coats of synthetic enamel paint over a coat of primer & bottom of flat iron embedded in PCC 1:3:6 type C2 of size 200mm x 200mm x 300mm (400mm below ground level an 100mm above ground level), exposed surface of concrete painted with 3 coats of white wash including necessary earth work & taking down existing un-serviceable cable route indicator complete all as specified and directed.

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