MAINTENANCE REPAIRS TO HT 11 KV PANELS TRANSFORMERS HT VCB OCB HT AND LT CABLING NETWORKREPAIR TO LT PANELS AND ALLIED CONNECTED WORKS AT PHASE I AND FAR FLUNG AREA OF GE I R AND D WEST BANGALORE

Amount

Excavation in trenches not exc. 1.5 m wide not exc. 1.5 m in depth; for laying of cables not exc. 10 Sqm on plan and getting out , trimming sides, forming bottom surface to required level complete in hard/dense soil all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers n.exc. 25cm thick as in soils all as specified and as directed.

Removing of excavated soil to a distance not exc. 50m and depositing where directed at a level n.exc 1.5m above starting point all as specified and as directed.

M&L for laying precast concrete cable covers, class HV, type 1, flat size 300mm x 180mm x 40mm complete all as specified and as directed.

Screening excavated earth (passing through 12 mm square mesh), laying riddled earth in trenches for cable protection, under and above Cable all as specified in SSR Part - I (Clause No 19.75) and as directed by Engineer-in-Charge. Note : Punned thickness of riddled earth of 18 cm will be measured and paid.

M&L for laying of burnt bricks sub class 'B' bricks of size 230 x 115 x 75 mm laid in trenches for cable protection all as specified and directed.

Supply and spread graded coarse aggreagate 20mm graded loose staking inside the chain fencing area of transformer.

Supply and spread graded coarse aggreagate 40mm graded loose staking inside the chain fencing area of transformer.

PCC 1:3:6 type C1 using 20mm graded stone aggregate for coping of poles/plinth blocks of HT poles etc including fair finishing the exposed surfaces even and smooth without using extra cement including necessary form work complete all as specified and as directed.

Taking down existing 11 KV grade cable and supply and laying new XLPE insulated, screened, bedded galvanised steel strip/wire armoured heavy duty with aluminium conductor of cross sectional area 185 Sqmm 3 core with cable protection works (as aplicable) laid in trenches/ducts/fixed on pole/wall/laid under road /path/culvert/drains/encased in pipe, including necessary lugs,joiniting and tesing complete all as specified and directed.

All as per item No 10 here in above but 95 Sqmm x 3.core all as speicified

Taking out old UNSV joint kit and Supplying, jointing & testing for 11 KV (Earthed) grade cable for indoor end termination heat shrink type joint complete with joining material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 185 sqmm complete all as directed

All as per item No 12 here in above but outdoor type 185 Sqmm all as speicified

All as per item No 12 here in above but indoor type 95 Sqmm all as speicified

All as per item No 12 here in above but outdoor type 50 to 95 Sqmm all as speicified

Taking out old unseviceable joints including supplying, jointing and testing Straight through cable jointing suitable for 1100 V, LT UG XLPE cable of size3.5core upto to 50 Sqmm complete all as specified and as directed

All as per above item no 16 here in above but 3.5 core 70 to 185sqmm Sqmm

Taking down existing 1100 Volts grade cable and laying only XLPE insulated, screened, bedded galvanised steel strip/wire armoured heavy duty with aluminium conductor of cross sectional area 50 Sqmm 3.5 core with cable protection works (as aplicable) laid in trenches/ducts/fixed on pole/wall/laid under road /path/culvert/drains/encased in pipe, including necessary lugs,joiniting and tesing complete all as specified and directed.

All as per item No 18 here in above but 3.5 core 120 to150 Sqmm

All as per item No 18 here in above but 3.5 core 70 to 95 Sqmm

All as per item No 18 here in above but 3.5 core up to 35 Sqmm. Notes:- for Sl item No 19 to 22 Cables shall be issued by dept under sch 'B' Free for fixing or from item sl no 22 to 25

Supply only , with PVC insulated aluminium conductor stranded conductor served with an inner sheathing of PVC tape armoured with galvanised steel wire or tape and overall PVC sheathed 16sq. mm 4 Core nominal cross section in service connection complete all as spd and directed by Engr - In - Charge.

All as per item No 22 here in above but 35 Sqmm x 3.5core all as speicified

All as per item No 22 here in above but 70 Sqmm x 3.5core all as speicified

All as per item No 22 here in above but 50 Sqmm x 3.5core all as speicified

Supply and laying GI tubing light grade 40 mm bore for cable protection fixed on wall/pole/laid in trenches complete all as specified and as directed

Supply and laying GI tubing light grade 50 mm bore for cable protection fixed on wall/pole/laid in trenches complete all as specified and as directed

Supply and laying GI tubing light grade 100 mm bore for cable protection fixed on wall/pole/laid in trenches including taking out old ones complete all as specified and as directed

Supply and fixing MCCB 4 pole 415 Volts, 400 Amps, adjustable type with breaking capacity 36 KA including taking out old unserviceable MCCB complete all as specified and as directed. Make : Indo Asian /L&T/Standard

Supply and fixing MCCB 4 pole 415 Volts, 250 Amps with breaking capacity 36 KA including taking out old unserviceable MCCB complete all as specified and as directed Make : Indo Asian /L&T/Standard

Supply and fixing MCCB 4 pole 415 Volts, 200 Amps with breaking capacity 36 KA including taking out old unserviceable MCCB complete all as specified and as directed Make : Indo Asian /L&T/Standard

Supply and fixing MCCB 4 pole 415 Volts, 160 Amps with breaking capacity 16 KA including taking out old unserviceable MCCB complete all as specified and as directedMake : Indo Asian /L&T/Standard

Supply and fixing MCCB 4 pole 415 Volts, 25 to 100 Amps with breaking capacity 16 KA including taking out old unserviceable MCCB complete all as specified and as directedMake : Indo Asian /L&T/Standard

Servicing and repairing of LT Air Circuit Breaker by drawing out mechanically ACB from cabinet clearing entire parts greasing, oiling tightening of nuts/bolts and replacing following unserviceable spare parts and reassembling the same. complete all as specified and as directed (a) Supply only under voltage release coil 230 Volts (b) Supply only Shunt release coil 230 Volts (c) Supply only closing coil 230 Volts

Repair / servicing to HT pannel of having vacuum circuit breaker 11 KV rating of capacity current rating up to 800 A by replacing defective/wornout part, adjustment of gaps for smooth operation all as detailed below:- (a) Cleaning of VCB with air blower and removing dust particals (b) Cleaning of insulating places of VCB by using CTC/CRC/Thinner as required and recommended by the manufacturer. (c) Checking the acring contact gap of vaccum intrupter if gap exceeds the permissible limis, readjust as recommended (d) Cleaning the main contacts to remove carbon or any other unwanted particals if visible. (e) Dismentling and cleaning the insulated surfaces and arc barrier with CTC and CRC. (f) Checking/repair replacement of all electrical wiring for electrical/manual operation of panel including measuring IR values. (g) Checking of all nuts/bolts, springs, levers, latches, connnectors etc and adjustments as required and recommended by the manufacturer. (h) Recording IR values of CTs and PTs. (j) Cleaning of bus bar spout. (k) Checking of all moving parts for proper functioning of VCB and adjustment as per manufacturer recommendations.

Program the existing numerical relay any model and type for over load and earth fault settings with respect to trip settings of HT panels sub station or other sub stn in such a way that faults are arrested locally including arranging or cracking of existing password all as required for smooth functioning of the HT panels complete all as specified and directed.

Supply and fix in replacement of U/S relay any type and make with Numerical relay microprocesser based model including retrofiting to the existing panels and programming the relays for overlaod and earthfault setting with respect to trip settings of HT panels Sub station or other sub station insuch a way that fault are arrested locally the tip testing carry over suitable with 66KV sub station/other complete all as specified and 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 earthling etc. as required 25 x 4 mm dia galvanised iron strip.

Supply and Fixing Lightning arrester Expulsion type of capacity HT 11KV 65(KA) station class complete with fixing clamps, bolts, nuts and washers fixed in repairs complete all as specified and directed by Eng-in-charge.

Repair and rplacement of 01 nos shock absorber of door assy of RMU unit any type /capacity including servicing, dusting, cleaning , greasing , tighting the nut /bolt of moveable and unmovable parts of the complete RMU unit , checking loader/charging assy all as specified and directed.

CT coils of ratio of 600/05 Amps of 230 Volts (set of 3)complete all as specified and as directed

CT coils of ratio of 400/05 Amps of 230 Volts (set of 3)complete all as specified and as directed

Repair / replacement of Indicator lamps 3 phase with RYB colours (set of 3)complete all as specified and as directed.

Supply only in aluminium lugs of size 70 Sqmm to 240 sq.mm complete all as specified and as directed.

Repairing and Replacement of potential transformer (PT) 11 KV/110 V with drawable type with automatic shutters by disconnecting PT from main power supply of VCB panel / Meter Cubical, separating fixed and moving chambers opening of covers, cleaning, meggering the windings etc., & commissioning after replacement of required unserviceable spare parts complete all as specified and directed. (i) Component / accessories to be replaced shall be inspected and approved by Engineer-in-Charge. (ii) Replacement of unserviceable spare parts/accessories for the equipment shall be measured and paid separately as supply only rates under relevant items of this schedule 'A'. (iv) Replacement of screws, nuts, bolts and consumables shall be deemed to be included in the rate quoted and no extra payment shall be allowed.

Repair / replacement of to voltage transformer indoor epoxy cast 11KV of capacity between 200 KVA to 1500 KVA to stop the oil leakage by draining out transformer oil complete in moisture proof drum, dismantling the top cover along with conservator tank, marshaling box, breather etc., replacing the gasket, washers , oil seals etc., reassembling transformer, refilling oil after filtration by high vacuum oil filtration plant and testing the leakage on completion of repairs all as specified and a directed.

Disconnecting the GOD of any capacity and make from main power supply after taking proper shut down and carrying out repairing of unserviceable GOD by taking down, dismantling & removing dust, carbon deposits or any other substance and replacing worn out parts like fixed contacts-03 Nos, moving contacts-03 Nos, reasssembling complete GOD, re installing in position after applying petroleum jelly on moving and fixed contacts complete all as specified and as directed.

Supply and fixing switch air brake gang operated11 KV HT Triple pole, mechanically operated, mounted on insulator and steel frame, with operating mechanism worked from ground level, for current rating upto 200 amps including taking down the old UNSV one complete all as directed.

Supply and replacement of rubber mate 25 mm thick as approved by Engr in charge size as per site all as speicified and directed.

Material and labour for preparation of old painted surfaces of electrical HT VCB / LT ACB/ LT Distribution panels/cable tray/ladders etc of any description over 10cm in width or girth and spray painting of one coat of synthetic enamel paint of exisitng shade and sign writing the description as directed.

Supply and replacement of plain Electrical Insulation Safety Floor mattings are specific kinds of rubber and non-conductive flooring options for operators working on live equipment 3mm thick as approved by Engr in charge size as per site all as speicified and directed.

Material and labour for Cold Rolled Rectangular 4 mm Mild Steel Chequered Plate, Material Grade: E 350 including cutting, grinding , cable gland type hole on the same plate icluding taking out old plate any type all as speicified and directed .

Servicing and Painting of two/four pole structure , and olled steel joists mild steel channels & supports with one coat of aluminium paint and colour paint as per the existing colour of the eqipments including colour code for RYB to indicate the colour code for body earthing & lighting arrestor complete including taking proper shut down & greasing the GOD switch & tightening of all bolts & nuts and replacement of ACSR conductor and PVC sleeves , wornout lugs, PG clamps and HT fuses in the structure as required at site including two coats of white wash for masonary plat form complete one coat of synthetic enamel paint for weld mesh, removing of Weeds / Plants inside the yard and Cleaning and painting of Chain link fence for tranformer area complete all as specified and as directed.

Dismantling insulators of any type, any size all as directed

Fixing of shackle type insulators of 100mm high, 115mm dia porcelain, vitreous, white, brown or green insulators for working pressure 11000 volts complete all as specified, required at site or directed.

Fixing only Pin type/Disc type porcelain, vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150 mm height, 150 mm dia for 11000 volts grade

M&L for shackle type insulators of 100 mm high, 115 mm dia porcelain, vitreous, white, brown or green insulators for working pressure 11000 volts complete all as specified, required at site or directed.

M&L for polimeric Pin type,insulator including and connected acessaries for fittng 11000 volts all as directed.

M&L for polimeric Disc type insulator, porcelain, vitreous 145mm high and 255mm dia any type, white, brown assembly for tension with tension clamps for conductors, working pressure 11000 volts all as directed.

Material and labour for detection of any type of fault in HT underground Line of any size and core. (laid in soil at plane area or forest area) with the help of HT Meggar. Seggregation of faulty span by meggering and making span serviceable by repair of cable or replacement of cable. Note : Item No 64&69 1. Detection of one fault in faulty span will be measured as Each Job. 2. Earth work and taking out will be measured seperately. 3. Material for repair and replacement will be measured saperately.

Supply and fix HT PT fuse of capacity 11 KV - 3 Amps all as specified and as directed.

Supply and fix HT PT of capacity 11 KV - 6 Amps all as specified and as directed.

Supply & fix Contacts of VCB,s all as specified and as directed.

Supply & fix moving contacts VCB,s all as specified and as directed.

M & L for detection /localisation of fault in HT 11 KV UG cable of any size and length , by means of cable fault locator including pinpointing the exact location of fault retrieving the exposing damaged portion carefully for further inspection and repairs complete all as specified and as directed by Engr - in - charge Note :- (i) Charges of cable fault equipment carried out by BESCOM/other agencies are deemed to be included in the item rate quoted (ii) Contractor on demand by dept has to arrange the above equipment without any delay failing which penalty will be levied by the dept.

Opening the transformer cover along with the conservator by removing the nuts bolts then after removing the internal H.T. & L.T. connections by taking them out by removing studs, bushings, taking out the core-winding assembly out of the tank, removing out burnt HV and LV windings from the core assembly, cleaning of core assembly with CTC including necessary repairs for the unserviceable transformers having ratio 11 / 0.433 KV, draining & decanting of burnt transformer oil and cleaning of sludge deposited in the tank with CTC for the transformers. Rewinding of HV and LV coils with suitable size super enamelled copper wire/ strip (As Existing) having suitable class insulation material. Heating of core winding assembly in hot chamber for 48 hours and removing all the moisture present in it, removal of leakage of tank if any by welding, refilling transformer oil to tank, after putting the core-winding assembly into the tank, reassembling making the internal H.T. & L.T. connections by fixing the studs, bushing, fitting the top cover by replacing cork sheet gasket along with conservator, testing the transformer in the workshop duly filled with oil, all as directed by Engineer-in-Charge for various capacities as under:- for upto 500KVA

All per the item No 68 here above but for 750 KVA Note for Item 67&68: Unserviceable items required for repairs such as HT/LT bushes, HT/LT stud and nut , bolt and washers. Transformer oil with die electric strength not less than 40 KV either new or filtered shall be filled and shall be measured and paid seperately under respective item.

Supply replacement of super enamelled copper winding wire/ strip of any size for H.T. coils of transformers all as specified.

Supply replacment copper winding strip of any size for L.T. coils of transformers including providing insulation all as required.

Disconnecting the power distribution transformers of any capacity from main power supply and carrying out oil filtration through high vacuum oil filtration plant, extracting the moisture content, dust, sludge and carbon deposits from oil and bringing to 40 KV/min die electric strength through 2.5 mm gap of testing electrode including carrying out acidity and di-electric strength test before and after oil filtration and submmission of test certificate complete all as specified and as directed by Engineer-in-charge.

Supply and filling up in replacement of Dehydrating agent silica gel superior quality to transformer's breather assy complete all as required and diercted.

S&F in replacement of Transformer breather assembly with silica gel filled breather unit of 500 gm capacity all as directed.

S&F in replacement of Transformer breather assembly with silica gel filled breather unit of 1000 gm capacity all as directed.

Supply only ISI Marked transformer oil in sealed drum and topping up of transformer oil in transformers after filtration with 50 to 60 KV/min of die-electric strength of oil by high vacuum oil filtration plant complete all as specified and as directed.

HT brass spindles with porcelain bush of power distribution transformer of capacity upto to 500 KVA including taking out unserviceable spindle complete all as specified and as directed.

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