8350 MAINTENANCE AND FILTERATION TO 33 KV POWER TRANSFORMERS AND 11 KV DISTRIBUTION TRANSFORMERS AND REPLACEMENT TO SWITCH GEARS ALONGWITH ALLIED WORKS AT TEACHNICAL AND RESIDENTIAL AREA AT NSTL UNDER AGE (I) RnD NSTL, VISAKHAPATNAM

Amount

M&L for online centrifuging (filtration/ dehydration) of transformer oil including checking di-electric strength of oil before and after filtration for 33KV/ 11KV indoor/out door transformers located at NSTL area with suitable machine having filtration, heating and pumping facility to improve the dielectric strength/ insulation value of oil. Notes :- (i) Di-electric strength of oil after filtration/ dehydration shall not be less than 90 KV/min. (ii) The contactor shall take shut down orders in writing from Engineer-in-charge before commencement of the work. (iii) The contractor shall ensure no wastage of transformer oil. (iv) The di-electric strength of oil shall be tested before & after filtration and test results shall be submitted to Engineer-in-Charge.

All as per Item No. 1 herein before but for 11KV/ 433V indoor/out door transformers located at NSTL area with suitable machine having filtration, heating and pumping facility to improve the dielectric strength/ insulation value of oil. Notes :- (i) Di-electric strength of oil after filtration/ dehydration shall not be less than 60 KV/min. (ii) The contactor shall take shut down orders in writing from Engineer-in-charge before commencement of the work. (iii) The contractor shall ensure no wastage of transformer oil. (iv) The di-electric strength of oil shall be tested before & after filtration and test results shall be submitted to Engineer-in-Charge.

M&L for spray painting with Silicon acrylic heat resistant paint of approved quality & colour to indoor/outdoor type, step up/step down transformer of 100 KVA to 500 KVA capacity, installed at different locations at NSTL after thoroughly scraping the existing corroded paint/rust, filling of cavities complete without disturbing/damaging the electrical net work system including writing the details such as SM/MES No., capacity/ rating/ incoming & outgoing details all as specified and as directed.

All as per item No 3 herein before but transformer of rating from 750 KVA to. 1600 KVA

All as per item No 3 herein before but transformer of rating 2000 KVA to 5000 KVA

S&F in repair silica gel breather assembly transparent type with first fill of silica gel suitable for 1000 KVA transformers complete including connecting with proper rubberized gasket complete including necessary GI fittings all as specified and directed.

Supply and fill silica gel in breathers of transformers all as specified. [Note: The silica gel shall be brought in air tight container]

Supply and filling new transformer oil for topping up the transformers duly filtered with filtration plant having dielectric strength not less than 60 KV complete all as specified and as directed. [Make : Poweroil/ Electrol/ Savitha/ Tashol/ Servo]. Note :- (a) The transformer oil shall be type EHV confirming to IS - 335/1983. (b) Mineral oil grade shall be used. (c) The IR value of transformer oil shall not be less than 60KV/min. (d) The unit rate shall be deemed to include the cost of filtration to achieve desired di-electric strength.

S&F gun metal gate valve of 32mm dia bore [Class-II, 1.6 Mpa] with ISI mark and iron wheel head, screwed both ends to GI pipes including taking down old unserviceable valve all as specified. [Make: Leader/ Bir/ Zoloto]

Supply and Fix in replacement of LV Porcelain bushing of rating 1.1 KV, 400 to 100 Amps complete suitable for indoor/ outdoor type, step up/ step down transformers of any make/ model complete all as specifieed and as directed.

Supply and Fix in replacement of HV Porcelain bushing of rating 12 KV, 250 to 630 Amps complete suitable for indoor/ outdoor type, step up/ step down transformers of any make/ model complete all as specifieed and as directed.

Taking down unserviceable sheet gasket (Cork sheet), Supply and fix synthetic rubberized cork sheet gasket 6mm thick for top cover HT/LT bushes at places existing and tighting all the bushings and top cover to avoid any oil leakages of capacity 100 KVA to 500 KVA complete all as specified and directed

All as per Item No. 12 herein before but for transformer of capacity 750 to 1600 KVA

M&L for Earthing complete with galvanized steel earth plate electrode 60cm x 60cm x 6mm thick, buried directly in ground (earth pit not less than 2.25m deep below ground level) with top edge of earth plate not less than 1.5m below normal ground level, connected to galvanized earth strip of 32X6mm size by means of bolts, nuts, check nuts and washers of galvanized iron or steel and connected from earth plate electrode to main switch board/ earthing test point including watering arrangement with PCC 1:3:6 type C1 chamber, MS funnel, wire gauge, 50mm thick precast RCC cover in Type B1, including necessary excavation in any type of soil, returning, filling in, removal of surplus soil to a distance n.exc 50m, charcoal and salt complete all as shown in electrical plate No. 3 of Schedule Part-I 2009 and connected to earthing test point all as specified or indicated and testing on completion

S&F earth continuity conductor or main earth lead of GI strip of size 32 x 6mm complete fixed to wall/ poles on battens or recess including 40mm height saddle type epoxy insulator or buried in ground including screws etc. and connections with existing earth test point complete all as specified and as directed by Engineer-in-charge including taking down existing strip.

Shifting of standby Transformer of any capacity from New/ Old MRS to various sub stations/ transformer locations at NSTL area by road, disconnecting and removing the existing faulty transformer and installation of standby transformer, making necessary HT/LT cable connections, earth connections and restoration of power supply including necessary T&P like hydraulic crane, truck, slings etc. all as specified and as directed

Supply and replace danger notice plate of 1.6mm thick mild steel sheet, vitreous enameled white, with letters, figures and conventional skull and bones in signal red colour and fixed with MS clamps, bolts and nuts of approved size, for LT 20x15cm size all as directed.

Supply and replace danger notice plate of 1.6mm thick mild steel sheet, vitreous enameled white, with letters, figures and conventional skull and bones in signal red colour and fixed with MS clamps, bolts and nuts of approved size, for HT 25x20cm size all as directed.

Supply, jointing and testing cable termination kit for 11KV (earthed) grade cable for out door end termination cold shrink type complete with jointing material and accessories suitable for XLPE armoured aluminium conductor cable of size 120/185 Sqmm all as specified. [Make: Raychem/ 3M/ Densons/ CCI]

All as per Item No. 31 herein before but for cable of size 3 core, 240/300 Sqmm

Supply, jointing and testing cable jointing kit for 11 KV (earthed) grade cable for straight through cold shrink type joint complete with jointing material and accessories suitable for XLPE armoured aluminium conductor cable of size 3 core 185 to 300sq.mm all as specified. [Make: Raychem/ 3M/ Densons/ CCI]

Supply, lay, testing of HT UG cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) with stranded Aluminium conductor 11000 Volts (earthed) grade of size 3 core 185sq.mm including disconnecting and taking out the existing unserviceable HT cable from trenches all specified and as directed. Note: (i) Necessary test results like continuity test, megger tests, shall be submitted to Engineer-in-Charge before the cable is laid. (ii) Excavation earth work will be measured and paid separately. [Make: CCI/ Havells/ Universal/ Gloster/ Asian]

All as per Item No 21 here-in-before but of size 3 core 120 sqmm

M&L for carrying out repairs to LT/ HT pillar box by taking down the doors, removing dents/ bends, cutting and removing rusted portions and welding new CRCA sheet of existing thickness, renewal of door gasket and refixing the doors with new hinges duly welded complete including applying two coats of synthetic enamel paint over a coat of zinc chrome primer on new steel surfaces all as specified and as directed.

Preparation of old painted surface of HT/ LT Panel boards, Cable duct of any size by scrapping including hinges, doors and applying two coats of synthetic enamel paint over a coat of zinc chrome primer complete all as specified and directed.

Excavating in trenches n. exc. 1.5m wide and n. exc. 1.5m in depth for foundation etc. or for shafts, wells, cesspits, manholes, pier holes etc. n. exc. 10sq.m. on plan and n. exc. 1.5m in depth and getting out in soft/ loose soil.

Returning, filling in including spreading leveling watering and well ramming in layers not exc 25cm in any type of soil.

Removing excavated materials to a distance not exc. 50m and depositing where directed at a level n.exc 1.50m above the starting point.

Supply and spread river sand as in cushioning for UG cable all as specified in clause 19.75 of SSR Part I. [Note: Punned down thickness shall be considered for payment]

Supply & lay Un-reinforced precast concrete cable cover class HV, type 1, flat of size 300mmx180mmx40mm for cable protection all as specified

Taking down unserviceable indication lamp and supply, fix and testing indication lamp (LED type) with showing red, yellow and green in colour of 22.5mm dia monitor on LT panel board suitable for 240V AC supply all as specified and directed. Make :- L&T / Binay

Disconnection and removing the LT cable connection from the Air Circuit breakers of capacity up to 1600 Amps AC 440 volts from existing LT panel including checking for faults, Complete Servicing & overhauling of ACB for smooth functioning and operation with repair/replacement of worn out parts such as Switches, Arcing contacts, Main contacts, Jaw contacts, triping coil, charging motor, relays etc with new spare parts suitable for the existing ACB's make, specifications complete including programming of relay to be done at the requisite settigs detaileed by Engr-in-charge and refixing the same in original position, testing complete all as specified and as directed by Engineer in charge. Make of existing ACB's : C & S /L & T/ ABB/GE. Note: (i) Required Spares for replacement are measured and paid seperately under relevent items as '' Supply only. '' (ii) Spares should be suitable for the existing LT ACB's

Supply only Isolating contacts 800A/1600A suitable for LT ACB's

Supply only shunt trip coil 230/440Volts suitable for LT ACB's

Supply only UV Coil 230/440Volts suitable for LT ACB's

Supply only Rack-in-Rack out mechanism suitable for LT ACB's

LEOENTERPRISES

LAKSHMI SAI CONSTRUCTIONS

SRIESWARI ENTERPRISES