REPAIR / REPLACEMENT AND MAINTENANCE OF 11 KV UG CABLES, VCBs, RMU PANELs, OCBs, 3 POLE / 4 POLE / HT STRUCTURE, MAINTAINANCE OF TRANSFORMERS AND CONNECTED WORKS UNDER GE CHILKA

Amount

Excavation in trenches not exc 1.50 m wide and not exc. 1.50 m depth for laying of UG cable / pole / stays etc, getting out in soft / loose soil complete all as specified and directed.

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

Removing surplus soil to a distance not exc. 50 m away and depositing where directed at a level not exc. 1.50 m above the starting point complete all as specified and directed.

Taking down all electric connection to insulator, PG clamp, jumpers (means tighed in nuts and bolts each accessories for smooth functioning of HT supply) in 2 / 3 / 4 / 6 pole HT 11 KV structures, overhauling of GOD switch and DO fuse assembly on 2 / 3 / 4 pole HT 11 KV structures and including replacing fuse wire, binding wire, greasing after applying CRC, replacing worn out nuts / bolts, burnout jumpers, PG clamps and reconnecting all accessoris in existing position and greasing after applying CRC for smooth operation complete all as specified and directed.

Supply and replacement of insulator pin type porcelain, vitreous, white, brown or green and including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150 mm height, 150 mm dia for 11 KV grade complete all as specified and directed

Supply and replacement of disc type insulator, porcelain, vitreous,145 mm high and 255 mm dia ball and socket type white, brown or green insulator single disc assembly for tension with tension clamps for conductors working pressure 11000 Volts complete all as specified and directed.

Supply and replacement of danger notice plate of 1.6 mm thick mild steel sheet, vitreous enamelled white, with letters, figures and conventional skull and bones in signal red colour and fixed with necessary MS clamps, bolt and nuts for HT of size 25 x 20 cm complete all as specified and directed .

Supply and replacement of expulsion fuse, single pole, channel type / drop out type suitable as per site requirement with working pressure 11 KV grade of capacity 50 to 100 Amps complete all as specified and directed.

Supply and replacement of lightning arrester expulsion type complete with all fittings, transmission class discharge capacity 65 KA suitable for working pressure 11000 Volts and including connection to earth with GI 32 x 6 mm strip complete all as specified and directed.

Supply and replacement of switch air break gang operated for 11 KV grade, triple pole vertically mounted on insulator and fitted on steel frame, current rating 200 Amps, mechanically operated mechanism from ground level consisting of operating rod of GI Pipe 25 mm bore light grade of suitable length with locking arrangement, mild steel flat iron clamp 50 x 6 mm complete all as specified and as directed

All as per Sl. item No. 10 above but current rating 400 Amps

Dismantling of air break gang operated switches HT 11 KV 3 Phase, 200 / 400 amps, vertical / horizontal mounted and including insulators and operating mechanism for repair / replacement of broken / worn out components and insulators etc. with or without taking down from pole complete all as specified and directed. Note :- (a) Spares needed to be replaced shall be measured and paid seperately as 'supply only' against respective items of schedule. The unit rate shall deemed to be included for labour component involved in replacement and handling of serviceable materials for reuse to site. (b) Any minor repairs involved to make the GOD functional even if notified by Engineer-in-Charge shall be carried out by the contractor without any extra cost to the department.

Supply only male contact/ moving contact blade suitable for air break gang operated switches, 11KV

Supply only female contact/ fix contact jaw suitable for air break gang operated switches, 11KV

Supply only tinned copper flexible jumper 200/400 Amps, suitable for air break gang operated switches, 11KV

Supply only MS jumper carrier, suitable for air break gang operated switches, 11KV

Supply only back connector plate, suitable for air break gang operated switches, 11KV

Supply & laying HT XLPE cable, insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electic power cable (heavy duty) with aluminium conductor, conforming to IS:7098 (Part II), 11 KV, ‘earthed grade, with following cross-sectional area laid in pipe/ ducts/ trenches/ under floor/under road and including testing, complete all as specified and directed. Note : Earthworks, sand cushioning, bricks, GI pipe, etc. will be measured and paid seperately under respective Items.

185 Sqmm, 3 core

M&L cable end jointing kit indoor termination heat shrinkable type complete with jointing materials with all accessories suitable for XLPE 11 KV (earthed), 3 core, armoured aluminium conductor cable of size 120 Sqmm to 185 Sqmm complete all as specified and as directed

M&L cable end jointing kit outdoor termination heat shrinkable type complete with jointing materials with all accessories suitable for XLPE 11 KV (Earthed), 3 Core, armoured aluminium conductor cable of size 120 Sqmm to 185 sqmm complete all as specified and as directed

M&L cable jointing kit straight through termination heat shrink-able type complete with jointing materials with all accessories suitable for XLPE 11 KV (earthed), 3 Core, armoured aluminium conductor cable of size 120 sqmm to 185 sqmm complete all as specified and directed.

S&F pre-cast reinforced cement concrete 1:2:4 (20 mm graded aggregate) of size 900 x 250 x 75 mm cable route indicator and including embossing 'DANGER / 11KV CABLE / MES' on both sides and painted Letters with approved colour, burried in ground for a depth of 45 cm including necessary earth work complete all as specified and directed.

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

S&F unreinforced pre-cast concrete cable cover, class HV type 2, flat of size 450 x180 x 40 mm with minimum average breaking load 350 Kg, as per IS-5820:1970, complete all as specified and directed.

S&F galvanised iron pipe 80 mm bore, light grade as in protection of UG cable laid in trenches, complete all as specified and directed.

Taking out transformer from its position from any location under GE Chilka for repair /servicing/ rewinding of capacity 63 to 400 KVA, 11 / 0.433 volts disconnecting / opening HV, LV electrical connections, earthing connections and including carrying out following works in presence of BOO detailed by GE complete all as specified and directed :- Note:- (a) The Engineer - in - Charge is liable to visit the workshop where the repair action of the transformer is done. (b) The contractor should intimate the date and time of opening of transformer 48 hours in advance and repair shall be completed within 7 days of handing over of Transformer.

(a) Transporation of transformer to workshop and back to site by making necessary arrangements of T&P (crane, recovery, vehicle, tripoid to be arranged by firm). (b) Opening of transformer top cover by extraction, removing of serviceable / unserviceable nuts bolts and washers etc . (c) Draining out of transformer oil and keeping in safe custody for reuse. (d) Lifting primary coil (HT) and secondary coil (LT) , dismantaling of transformer complete part by part carefully and display all the parts without damaging any portion. (e) Refilling topping up of transformer oil after dehyderation and filteration in transformer.

(f). Reassembeling the transformer. (g) Reinstall the transformer at site in position as directed after repair connecting HV, LV electrical connections, earthing connections and testing to entire satisfaction on load. Note:- (i) Replacement of userviceable parts like; bush insulator, brass studs, cork gasket, breather assembly, tap changer, rewinding, reinsulation of primary and secondary coil with copper winding wire, dehyderation and filteration of transformer oil etc shall be measured and paid seperately under respective Item of schedule. (ii) Renewal of adequate size Nut, bolts & washers of transformer top cover etc, shall deemed to be included in the unit rate quoted.

M&L for rewinding HT coil of 11/ 0433 KV transformer of any capacity using proper size DPC copper wire and insulation material, heating coils in heat chamber after rewinding and including taking out carefully burnt unserviceable copper winding of coils complete all as specified and directed.

All as per Sl. item No. 27 above but LT coil of 11/ 0.433 KV transformer

Re-insulation of HT coil of transformer of any capacity using proper size paper insulation material to form DPC copper wire and HT insulation material suitable for HT 11 KV transformer complete all as specified and directed. (Note: Item shall be measured only where re-insulation of copper wire is required.)

All as per Sl. item No. 29 above but LT coil of 11/ 0.433 KV Transformer

Servicing to transformer at site of any capacity installed on plinth / pole mounted structure by opening top cover & replacing unserviceable spares / components of transformer, without lifting core assembely, reassembling after repair & testing complete all as specified and directed. NOTE: Spare shall be measured and paid seperately.

Supply only ceramic bush insulators on LT side as per existing size, shape and specification for capacity 63 to 400 KVA, 11/0.433 volts transformers

Supply only brass stud on LT side as per existing size, shape and specification for capacity 63 to 400 KVA, 11/0.433 Volts transformers

Supply only cork sheet gasket (set of four) for ceramic bushing on LT side as per existing size, shape and specification complete for capacity 63 to 400 KVA, 11/0.433 Volts transformers

Supply only Ceramic Bush insulators on HT side as per existing size, shape and specification for capacity 63 to 400 KVA, 11/0.433 Volts transformers

Supply only brass stud on HT side as per existing size, shape and specification for capacity 63 to 400 KVA, 11/0.433 Volts transformers

Supply only top cover gasket set as per existing size, shape and specification complete for capacity 63 to 400 KVA , 11/0.433 Volts transformers

Supply only breather assembly as per existing size, shape and specification complete for capacity 63 to 400 KVA, 11/0.433 Volts transformers

Overhauling, servicing of tap changer and replacement of unserviceable minor parts as ordered and assembling for smooth functioning and operation complete as all specified and as directed

Dehydration and filtration of existing transformer oil of transformers capacity ranging from 63 KVA to 400 KVA, 11 / 0.433 KV on site at different locations without disturbing the power supply system with filtration machine and heating system in order to achieve Di-electric strength of oil 60 KV minimum at 2.5 mm gap complete all as specified and directed.

Supply & filling up of transformer oil conforming to IS -335 of 1993 as in topping up / replacement up to desired level of transformer oil capacity complete all as specified and directed. Note: Dielectric strength of oil should not be less than 60 KV when tested with 2.5 mm Gap electrode.

Supply and replacement of temperature guage as per existing for capacity 200 to 400 KVA, 11/0.433 Volts transformers complete all as specified and directed.

All as per Sl. Item No. 42 above but 63 to 160 KVA

Supply and replacement of pair of arcing horns suitable for transformer capacity 63 to 500 KVA, 11/0.433 Volts complete all as specified and directed.

Supply and replacement of silica gel in crystal form of breather assembly of transformer capacity upto 400 KVA complete all as specified and directed.

Supply and replacement of 25 mm dia gunmetal drain valve of transformer as per existing complete all as specified and directed.

All as per Sl. Item No. 46 above but 20 mm dia

M&L preparation of old painted transformer of 63 to 400 KVA, 11 / 0.433 volts capacity transformers by scrapping with steel wire brush / scrapper emery paper, etc. and applying one coat of synthetic enamel smoke grey paint with spray machine and including writing of SM No, MES No. etc. at prominent place / location of transformer with black synthetic enamel thick paint in white back ground complete all as specified and 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 wire 32 x 6 mm dia 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 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, 20 mm bore medium grade GI watering pipe, 15 mm bore GI light grade earth lead protection pipe, funnel, wire mesh, copper lugs, charcoal and common salt in alternate layer etc.

Supply and replacement of continuity conductor or main earthing lead fixed to wall or batten or reccess or chasses or buried in ground or drawn in conduit / pipe or fixed to poles or any other indicated situation for loop copper strip of size 20 mm x 3 mm connected to test point complete all as specified and directed.

M&L writing lettering on steel tubular / pre-stressed concrete pole (8 cm in height) with synthetic enamel paint (white) on base of black paint in round shape of 15 cm dia complete all as specified and directed.

Servicing, inspecting, checking, cleaning by using of blower, lubrication, greasing and carrying out preventive maintanance of RMU of capacity 11 KV, 250/350 MVA and including calibrating the relay by conducting secondary injection tests and making RMU in serviceable condition, testing and commissioning complete all as specified and as directed. Notes: (i) The rate quoted shall be deemed to be include for labour for supply only spare parts and necessary T&P, nuts, bolts, washers, gasket, insulation tape, compound, painting of RMU panels with approved colour and including lettering details all as per exisitng etc. (ii) Supply only spare parts shall be measured and paid separately.

Supply only self powered relay with O/C , S/C , E/F protection. Relay should have a front USB port for laptop interface, LCD display,10 event records, 5 fault records, min 2 setting group and keypad for setting parameters for the relay.

Supply only CT, Ratio 100-50/1-1A for Class - 1.0, 2.5VA for metering and class 10P10, 2.5VA for protection

Supply only cable termination bushing suitable for upto 1 run 3 core x 185 sq mm, XLPE cable

Supply only cable termination cover boots (push on type)

Supply only three phase (R/Y/B) indicating lamps

Supply only 11KV/230V AC, 1KVA control transformer

Supply only sealed lead acid battery 12 V 7 Ah

Supply only battery charger (I/P-230V AC, O/P - 24V DC, 10 A)

Supply only spring charging motor, 220 VAC/DC Type PMR5, 150 watts.

Supply only HRC fuse un 11 KV, in 3.15 Amp

Supply only multifunction meter model rish master 3428 class 1, 3 Ph, 110V L-L, 5A/1A, 50 HZ with option RS 485 output or its equivalent

Supply only voltage transformer, ratio 11KV / R3 / 110V / R3-110V / 3, burden 50 VA / 50 VA

Disconnect and taking out the IDMT / Numeric / Microprocessor based relay of any type of any make from 11 KV HT panel at 11KV sub stn INS Chilka, cleaning the contacts, calibrating the relay by conducting secondary injection tests, checking of current transformer, rectification of defects in control wiring for proper tripping of circuit breakers through CTs and relay and tripping coils, adjustment / setting to plug and time multiplier settings of the relay to achieve the discrimination in tripping, tune / synchronise upstream breaker relay settings, re-installation of relay, testing & commissioning etc, complete all as specified and directed.

Note: The contractor has to arrange necessary testing kits, testing equipments, tools etc. Testing & tuning shall be carried out in the presence of representative of the GE.

Taking down HT switch gear (Vacuum circuit breaker) at 11KV sub stn INS Chilka site of capacity 11 KV, 250 / 350 MVA comprising of repairs, complete overhauling / servicing, carrying out preventive maintenance alongwith testing of breakers by current injection test and refixing the same after repairs/ overhauling complete all as specified and directed.

Note: (i) The servicing includes for busbar duct chamber, cable alleys and connecting accessories (ii) The rate quoted shall be deemed to be include for necessary T&P, minor parts i.e. nuts, bolts, washers, gasket, insulation tape, compound, painting of VCB/Switch gear panels with approved colour including lettering details all as per existing etc, to put in to the VCBs and panels in serviceable condition.

(iii) Major spares like breaker bushings, vacuum interrupter assly, busbar spout, busbar spout connections, circuit spout / circuit spout connections / buffer fixed contacts, moving contacts, tank assly / barriers, solenoid spares, dependent / spring mechanism / motor mechanism, trip unit etc, will be measured and paid separately under relevant items of BOQ, (iv) The servicing shall be carried out by auhtorised service engineer of OEM and approval of the same shall be taken before commencement.

Supply only spares for the following:-

CTs epoxy cast wound primary CTs with minimum primary current 50 to 100 A, double ratio, double core (Protection core-5P10/10P10 & Metering core- class 1.0), 25 KA for 1 sec of 15 VA minimum burden. (existing size)

1.5 sqmm flexible FRLS PVC insulated multistranded copper conductor cable, unsheathed, 1100 V grade for control wiring.

2.5 sqmm flexible FRLS PVC insulated multistranded copper conductor cable, unsheathed, 1100 V grade for control wiring.

LED indication lamps

Shunt trip coil 110 V DC/220 V DC

Breaker control switch

Busbar spout

Circuit spout

Control circuit fuses 2 A to 63 A

HRC fuse (PT HT side). Un-11KV, In=3.15 Amp

PT plug contact

Single function meter, digital type voltmeter / ammeter class 1.0, 3 phase. Suitable for mounting on existing HT panel.

VCB buffers

110 Volt DC closing coil assembly

Push to trip knob red assembly

Push to trip knob green assembly

Ratchet wheel

Nylon release lever

VCB charging powl

Shutters for racking shaft

Bus bar support insulator for VCB panel

Vaccume Interrupter Bottle 12 KV, 50 HZ Model WL 33379 suitable for VCB 630/800 Amp.

Rectifier

Thermostat for 11 KV VCB heating element with temperature range from 0 to 100 degree centigrade, 15A, 240/250 AC supply suitable for 630/800 Amp VCB complete all as specified and directed.

Master trip relay suitable for working voltage 110 Volt DC and connecting the circuit with existing over current and earth fault relay

Supply and replacement of damaged space heater in HT VCB 11 KV suitable to operate on 15 Amp, 240/250 V AC supply for 630/800 Amp VCB/RMU Panel with necessary wiring and control cable with toggle switch complete all as specified and directed.

Surface dressing n. exc.15 cm deep around and surroundings areas of E/M installations and removing rubbish / debris upto a distance of not less than 50 m complete all as directed.

PABITRA MOHAN PARIDA