MAINTENANCE AND REPAIR TO HT 11 KV SUPPLY NETWORK AT 2AFSB UNDER AGE (I) (AF) CHIMNEY HILLS

Amount

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m deep and getting out in hard/dense soil for laying/repair of cable, complete all as specified and directed.

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

Removing excavated materials to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point, complete all as specified and directed..

Material & Labour for sand cushioning in trenches spreading and consolidation 8cm thick before laying the cable & 15 cm of sand after laying the cable, complete all as specified and directed.

Supply and lay HT under ground cable XLPE insulated PVC bedded galvanised steel strip or wire armoured electrc power cable (heavyduty) with aluminiun coductor, 11000 V earthed grade with cross sectional area 95 Sq.mm 3 core including taking out old unserviceable cable, complete all as specified and directed.

Supply and lay LT under ground cable XLPE insulated armoured heavy duty 1100V grade with multistranded/solid aluminium conductor confirming to relevant IS in trenches, ducts, through pipes fixed to wall etc all as directed including cable gland, terminal socket and connecting up of size 240 sqmm 3.5 core including dismantling of old unserviceable cable, complete all as specified and directed.

Supply and lay reinforced precast concrete cable cover class HV type 1 flat size 300X180X40 mm complete all as specified and directed.

Supply and layreinforced precast concrete cable cover class LV type 1 flat size 250X150X40 mm complete all as specified and directed.

Supply and lay in repair GI tubing light grade, 80 mm dia in trenches for road crossing/laid in floors etc complete all as specified and directed.

Material & Labour in repair for cable jointing kit for 11KV (Earthed) grade cable for outdoor end termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 to 185 Sqmm and testing after jointing including taking out unserviceable joint kit complete all as specified and as directed.

Material & Labour in repair for cable jointing kit for 11KV (Earthed) grade cable for indoor end termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm and testing after jointing including taking out unserviceable joint kit complete all as specified and as directed.

Supply, jointing and testing out door type HT cable end termination joint "straight through" heat shrinkable suitable for aluminum conductor XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, and over all PVC sheathed cable 11000 volts grade 3 core 95 sqmm nominal size, all as specified & directed.

Material & Labour for lightning arresters for outdoor use expulsion type suitable for 11000 volts (HT) complete with all fittings, transmission class, discharge capacity 65 KA including taking down existing lightening arresters of any type and size, complete all as specified and as directed.

Material & Labour in repair for fixing barrel fuse including fuse element suitable for HT 11 KV drop out fuse carrier up to 15 Amp rating all as directed after dismantling the exisiting out lived fuse barrel complete all as specified and as directed.

Material & Labour for Dismantling insulators of any type and size complete all as specified and as directed.

Material & Labour for pin type, porcelain vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut 150mm height, 150mm dia for 11000 volts grade complete all as specified and directed.

Material & Labour in repair Danger notice plate of 1.6mm thick mild steel sheet with vitreouse name lled with letter figures and conventional skull and bones insignal red colour and fixed with MS clamps, bolts and nuts of approved size for HT, 25 x 20 cm complete all as specified and directed.

Material & Labour in repair Earth continuity conductor or main earthing lead fixed to pole on batten or recess or chases or buried inground or drawn in conduit/pipe or fixed to poles or any other indicatedsituation for loop earthing etc. as required 20 X 3mm copper strip complete all as specified and directed.

Material & Labour for replacement of the HT porcelain bushings complete of Transformer from 100 KVA to 315 KVA capacity distribution transformers of existing transformer make/ size/ type including dismantling old one complete all as specified and directed.

Material & Labour for replacement of the LT bushing rod made out of gun metal with threading & of suitable length/ size all as per existing including metal rings/ bolts/ washers/ rubber rings etc. complete from 100 KVA to 160 KVA capacity distribution transformers of any make/ size/ type including dismantling old one all as specified and as directed

Material & Labour in repair providing earthing complete with copper s earth plate electrode 60 CM x 60 CM X 3 mm thick buried directly in ground earth pit not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 Mtr below normal ground level ,Alternate layers of back filling compound(BFC) & common salt Crystal and connected to copper earth strip 20 x3 mm by means of bolts, nuts, check nuts & washers of copper and connecting to earth dolly all as shown in electrical plate No. 5 of SSR Part I of 1991 & testing complete including 40mm dia light grade GI pipe upto 7.5mtr long, excavation in any type of strata, PCC ( 1:3:6 ) type C1 earthing chamber, pre cast slab 50 mm thick in cement concrete ( 1: 2 : 4 ) type B 1 , test box , including 20 mm bore water pipe medium grade GI protection pipe. including GI Funnel , wire mesh, including earth work etc complete all as specified and directed.. Note1 :- Earth continuity conductor and GI protection pipe beyond 7.5m shall be measured and paid under the respective items ).

Material & Labour for Repair / service / overhauling of gang operating devices 11000 volts upto 400 Amps including greasing all the moving parts and applying white petroleum jelly at the contact points, tightening all nuts and bolts and providing PG clamps, additional nut and bolts, commissioning and testing complete including dismantling and replacing all the unserviceable parts / spares complete all as specified and directed. Note: Supply only of all the spares replaced shall be measured and paid separately.

Supply & Fixing moving contact blades suitable for 11 KV complete all as specified and directed.

Supply & Fixing contact jaw copper suitable for 11 KV complete all as specified and directed.

Servicing of transformer any type ,11000 Volt / 433 Volts and 433 / 380 volt, step down/Step up, indoor/out door,type of capacity upto 315 KVA comprising following work services :- (a) Disconnection of cable termination of HT & LT ends. (b) Opening of top cover by removing nuts, bolts and all mounting accessories and conservator tanks for visual inspection. (c) checking of HT/LT insulators including internal inspection (d) Replacement of corroded nuts/bolts with double washers, burned lugs, etc by new one (e) Servicing of tap changing gears by cleaning and polishing tapping contact points.(f) Removing, cleaning, polishing of bushings and studs of both HT/LT side by using soft cotton cloth including checking for cracking and refixing the same. (g) Refixing all cable terminals HV & LV sides and transformer top cover, conservator tank and other fitments in position. (h) replacing of oil level indicator glass. . (k) Connecting HT & LT side with existing incoming and outgoing cables including re-connection of earth strip/lead. (l) HT side cable connection shall be made with new HT tape & M Seal Monoplast as required at site. (m) All marshalling boxes to be cleaned. (n) All the terminal connection of control and relay wiring to be checked and tighten. (o) Examine the rollers carefully includes greasing them properly.

Servicing of Automatic Power Factor Correction (APFC) panel Quarterly of the capacity 50 kVAr complete comprising MDXL type heavy duty capacitor having low watt loss, APFC relay, MCCB, Cooling fan, Voltmeter, Ammeter, CTs with all other connected accessories, checking of serviceability of each component, cleaning all contact points, tightening of all connections including replacement of unserviceable components, thimbles, nut bolt and washers, etc if necessary, cleaning the entire panel by using hot blower complete all as directed by Engineer-in-Charge.

Supply and fixing in repairs of Heavy duty capacitors 3 to 25 kVAr, voltage 440 volt, 3 Phase, cylindrical, having operating losses 0.35 W/kVAr of Make L&T / MEHAR/Havells/C&S/ABB or equivalent make approved by Engineer-in-Charge..

Supply and fix in repair ACB, for pole,415 V, Manually drawn out type micro processor release of capacity 630 Amps

Material & Labour for in repair GOD / Switches air break ,Triple pole, mechanically operated, mounted on insulator and steel frame, with operating mechanism worked from ground level, for current rating upto 200 amps including dismantling old all as per directed by Engineer in charge.

Material & Labour for defect rectification in HT 11 KV cable laid in trenches by locating fault with the help of electronic fault locator machine comprising of surge generator pulse ECHP fault location with high frequency distance calculator etc. including excavation in any type of soil strata exposing the cable fault removal of deteriorated position of cable treating of cable and keeping the same ready for jointing work for cables of size upto 300 Sqmm 3 core complete complete all as specified and directed.

Notes for Srl. Item No.30 : (i) The contractor shall bring the fault locating equipment at site with in 02 hours of instructions received from Engineer -in- charge and he shall ensure that the fault is rectified with in 24 hours of receipt of intimation from Engineer-in-charge failing which recovery of Rs. 500.00 per hour shall be recovered from the contractors dues w.e.f the time immediately after the expiry of 24 hours duration. (ii) For the purpose of payment one unit of “Each job” shall comprise of detection of faults in a particular stretch of cable which are identified in that particular stretch, irrespective of number of defects / faults in that particular stretch which are detected during fault detection and the contractors unit rate quoted shall be deemed to include for the same and all such defects / faults which are detected in that particular stretch shall be considered as one unit. (iii.) Joints, jointing materials and cable required shall be measured and paid for separately.

Material and labour for servicing of HT VCB 11 KV alongwith CTs/PTs of current rating upto 800 A of any make and type by drawing out breaker assembly from panel and carry out the following work:- (i) Cleaning/decarbonizing of all fixed and moving contacts, levers, springs using suitable cleaning agent and tightening of screws, nuts, bolts, spring etc, (ii) Adjust the trolley in and out mechanism , (iii) Lubricating/greasing of all operating mechanism and moving parts, switching & tripping mechanism, automatic shuttering system, necessary brazing, turnig, polishing of main and auxiliary contact, demoisturing of insulators, etc to be done (iv) Testing of tripping performance of HT VCB by primary & secondary high current injection, testing of CT ratio and polarity, (vi) Checking of tripping relay including interlocking if any.(viii) Checking of operating mechanism adjustments, measurements of the mechanical clearances of the operating mechanism, internal wiring circuit etc, tightening of all connections, replacement of HRC fuse, fuze carrier base (if any found u/s) including removing moisture deposit inside the VCB. (ix) Checking all end terminals, tightening the nut bolt and washers, replace the unserviceable nut, bolt & washers, draw-in the breaker, put in position, engage the VCB with the supply system and testing for smooth functioning complete all as specified and directed.

NOTE for Srl. Item No.31: (i) The cost of cleaning materials, HT Tape, thinner, cotton waste, monoplast, steel nut, bolt with double washers, HRC fuses, MCB SP upto 6 Amp, fuse carrier base, replacement of complete HT packing/gasket shall deemed to be included in the quoted rate. (ii) Contractor shall isolate and earth the breaker before start the work. (iii) Servicing of HT VCBs should be carried out as per the schedule of shutdown prepared by the Engineer-in-charge. No exemption to postpone or cancel the work is permitted unless due to administrative reasons accepted by the Engineer-in-chrge. Failure of doing the work as per schedule shall be levied a penalty of 5000.00 Rs per job.

M/S - KRUPA ELECTRICALS (BID ID -3496616)