8370 REPAIRS/ REPLACEMENT OF 11KV HT GODS, HT CABLES/ JOINTS, SWITCH GEARS INCLUDING FILTRATIONOF 11 KV TRANSFORMERS, SERVICING OF VCBS AND CONNECTED EXTERNAL ELECTRICAL WORKS AT DRDL KALINGA UNDER AGE (I) RnD NSTL, VISAKHAPATNAM.

Amount

Dis-connecting the HT 11KV VCB panel indoor / outdoor capacity ranging from 630 to 1600 Amp, Over hauling of complete panel by taking out the trolley of the breaker, opening the total mechanism of breaker checking its contact, baffle plates and other minor parts, cleaning the complete accessories carefully. Minor repairs shall be rectified, Parts/accessories shall be cleaned, the tank, baffle plates, rotating contact, upper supports, lower supports, drive assembies and all other spare parts. re-assembled after repair / replacement of the spare parts including calibration, testing of existing IDTM relay as per load parameter complete all as directed by Engineer-in-Charge. Notes:-(i) Repair work shall be carried out only by the authorised technician for VCB. (ii) Spare parts as required for replacement of existing worn out parts shall be measured and paid separately under supply only items.of existing make .(iii) Labour for fixing of the supply only items shall be deemed to be included in the unit rate quoted .

Supply only Spout bushing for Indoor 11 KV 1200 Amps assembly for upper side VCB. Make: Crompton greaves/ ABB/ Siemens

Supply only Spout bushing for Indoor 11 KV 1200 Amps assembly for lower side VCB. Make: Crompton greaves/ ABB/ Siemens

Supply only 800 amps. Contact plugs (upper)

Supply only 800 amps. Contact plugs (lower)

Supply only 800 Amps Finger Contact assebly

Supply only Spring charging motor assly. 110/230 v ac/dc for 11 KV Indoor / Outdoor VCB

Supply only Ratcet handle

Supply only closing coil assembly 110 v DC for VCB all as specified & directed. Make :- Amara Raja/schneider

Supply only fix tripping coil 110 V DC for VCB all as specified & directed. Make :- Amara Raja/schneider

Supply only closing buffer for 11KV VCB Make: Amara Raja/schneider

Supply only motor cut-off switch (micro switch) 2NO+2NC. Make: Amara Raja/schneider

Supply only Service/ test position limit switch(1NO+1NC). Make: Amara Raja/schneider

Supply only 11 Kv PT HV Back up fuse as per OEM Recommendation. Make: Schnider/Bussmann

Repairs to Spring Charging motors of capacity 230 V AC/DC Universal with gear box for VCB of 11/ 433 KV of suitable size and capacity for existing VCB as recommended by OEM complete all as specified and as directed by Engineer-in-charge.

Supply and fix in repairst of Breaker control switch of capacity 25A, 3-position (Trip/ Neutral/ Close) Suttable for 11Kv/33kv VCB/SF6 brakears

Supply and fix LED Indication lamps for VCB of 11KV and 433 KV, of Universal voltage AC/DC 110/230 Volts of colour Red, Yellow, Blue, Green, Amber, White as required at site complete all as specified and as directed.

Supply, fixing, testing and commissioning of resin current transformer suitable for 11 KV, 100/50/1-1A of primary wound type with adjustable VA burden and accuracy in cleaning the CT wiring with primary and secondary injection kit incl identification to the base and connecting links to HT VCB to match with the existing system incl taking down unserviceable transformer. Make : Kappa/CG/Alstom/Jyothi

Supply and fix in repairs single core 2.5 sqmm cable with copper conductor PVC round sheathed (flexible) industrial control for connections from CTs to relay control panel of capacity 11 KV and 433 KV including all necessary connections required, testing of relay after completing for proper functioning complete all as specified and as directed.

Supply and fix in repairs single core 1.5 sqmm cable with copper conductor PVC round sheathed (flexible) industrial control for connections from PTs to relay control panel of capacity 11 KV and 433 KV including all necessary connections required, testing of relay after completing for proper functioning complete all as specified and as directed.

Filteration of transformer oil of step down 11 KV / 0.433 KV indoor/outdoor type Transformer installed at different sub stations/locations using filtration and heating equipment at site by re-circulating transformer oil heating, dehydration and improving di-electric strength of the oil to withstand 60 KV for one minute including testing of oil as specified and directed. Notes : (a) The contractor will take shut down orders in working before commencement of the work from Engineer-in-charge. (b) The contractor shall ensure no wastage transformer oil. (c) The Contractor is solely responsible for any damage to the transformer during filetration operations. He is responsible for making good any damage to the transformer at his own cost without any extra cost to the department. (d) The contractor shall ensure that the conservator tanks are full to its level before starting the dehydration. (e) The di-electric strength of oil shall be tested before & after filtration. Test results shall be submitted to Engineer-in-charge

Material and labour for Spray painting with Silicon Acrylic heat resistant paint of approved quality & colour to indoor/outdoor type, step up/ down transformer of capacity up to 750 KVA, installed at different locations at DRDL Kalinga after thoroughly scrapping the existing corroded paint/ rust, filling of cavities complete without disturbing/ damaging the electrical network system including writing the details such as SM/ MES No, Capacity/ Rating/ Incoming and outgoing details all as specified and directed.

Supply and fix in repair silica gel breather assembly transparent type with first fill of silica gel suitable for 1 kg breather Transformers complete including connecting with proper rubberized gasket complete including necessary GI fitting complete all as specified and directed. Make : As recommende by OEM.

Supply and filling 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 transformer duly filtered with filtration plant all as specified and as directed. Make : Power Oil/ Electrol/ Servo Notes : (a) The transformer oil shall be type EHV confirming to IS - 3351983 (b) Mineral oil grade shall be used. (c) The transformer oil should have a high dielectric strength not less than 60 KV/Min

Supply & Fix in repairs Gun metal gate valve of 32 mm dia bore [Class-II, 1.6 Mpa] with ISI mark and iron wheel head, screwed both ends to GI pipes complete all as specifeid and as directed.

Supply and Fix in repairs 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 repairs of HV Porcelain bushing of rating 11 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.

Material and labour for earthing complete with galvanised steel earth plate electrode 60 x 60 cm and 6 mm thick burried directly in ground (earth pit not less than 2.25 m deep below ground level) with top edge of plate not less than 1.5 m below ground level connected to galvanised GI earth strip 32 x 6 mm size by means of nuts, bolts, check nuts and washers of the galvanised iron or steel all as shown in electrical plate No 5 connected to earthing test point including watering arrangement with PCC 1:3:6 type C1 chamber, MS Funnel, Wire Guage, 50 mm thick precast RCC Coverin Type B1 including necessary excavation in any type of soil, returning, filling in, removal of surplus soil to a distance n exc 50 m, char coal and salt complete all as shown in electrical Plate No. 3 of SSR Part-1 2009 and conecting to earth test point all as specified and as directed. Note : Contractor should submit test results of earthings.

M &L for carrying out repairs to 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 directed.

Preparation of old painted surface of HT Panel boards, Cable duct of any size by scrapping including hinges, doors and applying two coats of synthetic enamel paint complete all as specified and directed.

M & L for taking down 11 KV grade unserviceable Pin/post insulators from the HT 2 pole/4 pole structure and S&F pin type composite insulation/silicon rubber material including one galvanishing MS spingle, nuts & washers of 150mm height, 150 mm dia for 11000 volt grade and fixing to the structure and binding of conductor all as directed. Make: GK Electricals /Jaipuria / ABI

M & L for taking down HT 11 KV grade triple pole gange operated Air break switch from 4 pole/2 pole structure and S & F NEW gang operated Air break switch (GOD) HT 11 KV of 200 A capacity out door type suitable for vertical/horizantal mounting fixed type complete with 3 no. silicon rubber polymeric insulator per phase all as specified and directed. Make: GK Electricals/ Jaipuria/ ABI

M & L for taking down HT 11 KV drop out fuse from 4 pole/2 pole structure and S & F NEW single phase with silicon rubber polymeric insulator type drop out fuse complete all as specified and directed. Make: GK Electricals /ABB / Areva /BHEL/Jaipuria

M & L for taking down the damaged / un serviceable Lighting arresters expulsion type suitable for 11000 volts complete with all fittings, transmission class, discharge capacity 6.5 Kilo Amps Make: HTSG /JAIPURIA

Supply and lay in replacement Cross linked poly-ethylene (XLPE) insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric earthed power cables ( heavy duty) with aluminium conductor, 11000 volts grade of cross-sectional area 240 Sqmm 3 core conforming to IS-7098 (Part-I) laid in trenches/through pipe in road crossings/ paths /drains /ducts /floors /along poles/walls/ceilings/ equipments etc. complete supply and fixed/ laid all as specified and as directed by Engineer-in-Charge.( Note:-(i) Necessary excavation and earth work, brick protection, sand cushioning and cover and GI pipe shall be measured and paid for separately. )

M&L for isolating, cutting, removing the existing damaged end termination and S&F outdoor end termination Cold shrinkable outdoor type (Earthed) suitable for HT UG cable XLPE insulated 3 Core 240 to 300 Sqmm 11KV grade including preparation complete all as directed.

M&L for cutting, removing the existing damaged joint and S&F straight through joint Cold shrinkable type suitable for HT UG cable XLPE insulalted 3 core 240 sqmm 11000V grade including preparation complete all as directed

Taking down/out old unserviceable burnt/punctured/faulty aluminium cable/ Cross linked poly-ethylene (XLPE) insulated, HT cable 95 sqmm to 240 sqmm x 3 core from pole/ laid in trenches/through pipe in road crossings/ paths /drains /ducts /floors /along poles /walls/ceilings/ equipments etc and relaying the same after removing of defect including cutting making jointing complete all as specified and as directed by Engineer-in-Charge. (Note:- (i) Earth work and cable jointing kit will be measured and paid separetly

M & L for pin pointing fault of faulty 11 KV HT cables by using HT cable fault locator machine,removing the fault and testing HT Cable at 11 KV complete Job all as specified and as directed by the Engineer-in-Charge.

Excavation in trenches in soft/loose soil not exceeding 1.5 metre wide and not exceeding 1.5 metre depth for route of cable and getting out complete all as specified and as directed by the Engineer-in-Charge.

Returning, filling including spreading, leveling, watering and well ramming, in layers not exc 25 cm complete all as specified and as directed by the Engineer-in-Charge.

Removing of surplus soil to a distance not exc. 50 metre and depositing where directed at a level not exc.1.5 metre above the starting point complete all as specified and as directed by the Engineer-in-Charge.

M & L for dry sand cushioning and cover for protection of cable, complete all as specified and as directed by the Engineer-in-Charge.

Supply and laying un-rainforce, precast concrete cable cover class HV, type-I of size 300mm x 180 mm x 40mm all as specified and directed by Engineer-in-Charge

Material and laying crushed stone aggregate for loose filling of gauge not exc 63 mm

MONITOR ENGINEERING WORKS

S A R CONSTRUCTIONS