CWE/AF AMB/SAR-T-66/2025-26 REPAIR MAINT AND SERVICING OF HT UG CABLES TRANSFORMERS VCBS AND OTHER MISC WORKS AT 1 AFSB DEHRADUN UNDER GE AF SARSAWA

Supply, laying, jointing, testing & commissioning in replacement of HT XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 volts (earthed), ISI marked with IS-7098 Part II with amendments upto date, size of cross sectional area 95 Sqmm, 3 core, laid as in trenches or fixed along the wall/pole or passing through pipes/ducts etc, complete all as specified & directed. Notes : (i) Cable shall be of manufacturing date not earlier than Oct 2025. All the cable shall be embossed with year of manufacturing, meterage at every metre, in addition to its own standard markings as per IS i.e. Size, voltage etc. (ii) Excavation & earth work, sand cushioning, protection pipes, end termination joints & protection covers shall be measured and paid separately.

Excavation in trenches, not exceeding 1.5mtr wide & not exceeding 1.5mtr in depth; for foundation, laying/taking out pipes/cables etc. or for shafts, wells, cesspits, manholes, pier holes, etc. not exceeding 10sqm on plan & not exceeding 1.5mtr in depth and getting out, in soft/loose type soil complete all as specified & directed.

Material and labour sand cushioning to cable with a layer of sand 8 cm deep before laying the cable and 15 cm deep after laying the cable (punned down to 18 cm depth after laying and stretching of cable ) complete all as specified & directed.

Supply & laying un-reinforced precast concrete cable cover , Class HV type-1 flat, size 300mm x 180mm x 40mm, laid flat for protection of cable , adjacent to each other, perpendicular to central axis of electric cable complete including taking out old bricks all as specified & directed.

Returning filling in including spreading leveling watering and well ramming in layers not exceeding 25cm thick each in soft/loose type soil complete all as specified & directed.

Removal of excavated surplus soil to a distance not exceeding 50 mtr & depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified & directed.

Material and labour for plain cement concrete (PCC) 1:3:6, type C-1, using 20 mm graded mechanically crushed stone aggregates as in coping to pole etc. including necessary formwork to exposed surface finished even & smooth complete all as specified & directed.

Material and labour for cutting of road/ hard standing up to a size not exceeding 20cm width and not exceeding 60cm in depth for laying of cable protection pipe including making good the disturbed road/hard standing by providing PCC (1:2:4) type B1 to much the existing surface level complete all as directed.

Material and labour for fault finding on HT cables of any size and any length with fault detective machine by thumbing method and suitable high voltage complete all as specified and directed.

All as per item No 9.00 here in before but search for an additional fault all as specified and directed.

Supply and fix cable jointing STRAIGHT THROUGH JOINT for 11KV grade cable for straight through joint complete with Jointing material (Heat shrinkable)and accessories suitable for 3 core XLPE armoured, alluminum conductor cable of size upto 95 sq mm and all as directed by Engineer-In-Charge.

Supply and fix cable jointing END TERMINATION JOINT for 11KV grade cable for End termination joint complete with Jointing material (Heat shrinkable)and accessories suitable for 3 core XLPE armoured, alluminum conductor cable of size upto 95 sq mm and all as directed by Engineer-In-Charge.

Supplying and laying in replacement of GI pipe, 100mm dia, Light grade for cable protection at pole/road crossing etc including necessary road cutting and making good with PCC 1:2:4, Type B-1, using 20mm graded stone aggregate, 100mm thick or fixing on wall / poles of any type, secured with clamps complete all as specified and as directed by the Engineer - in - Charge.

Dismantling the Potential Transformer (PT) 11 KV Oil Cooled from installed position on steel structure after disconnecting electric supply from both sides for necessary repairs like as replacement of washer, replacement of corcksheet, refilling of oil etc after checking and make functional of Potential Transformer (PT) and installing in its original position and making all electric connections and testing complete all as specified and as directed by Engineer-in-charge.

Dismantling the Current Transformer (CT) 11 KV Oil Cooled from installed position on steel structure after disconnecting electric supply from both sides for necessary repairs like as replacement of washer, replacement of corcksheet, refilling of oil etc after checking and make functional of Current Transformer (CT) and installing in its original position and making all electric connections and testing complete all as specified and as directed by Engineer-in-charge. Notes for srl No-14 & 15 : (i) Labour component required for the repalcement of unserviceable parts shall be deemed to be included in the unit rate quoted against this item (ii) Transformer oil shall be measured & paid separately under relevant item. (iii) T&P and minor parts will be arranged by the contractor and the cost thereof shall be deemed to be included in the unit rate quoted against this item.

Dismantling of existing Potential Transformer (PT), Current Transformer (CT) 11 KV, metering unit alongwith connected items from four/two pole structure after disconnecting incoming & out going connections and shifted/installed on existing plateform carefully where as directed including connecting up electrically on both side to the same complete and testing all as specified and directed by Engr-in-charge.

Material and labour for dismantling and removal of HT Steel tubular four pole structure of 11.00 mtr long alongwith base plate and pole cap including 11 KV GODs and Lightening arrestor after breaking PCC plinth block, coping including making good disturbed surface with PCC 1:4:8 complete all as specified & directed.

Material and labour for dismantling and removal of HT Steel tubular two pole structure of 11.00 mtr long alongwith base plate and pole cap including 11 KV GODs and Lightening arrestor after breaking PCC plinth block, coping including making good disturbed surface with PCC 1:4:8 complete all as specified & directed.

Supply and filling of transformer oil as per IS 335-1993 in company sealed barrels for transformers installed at various site for topping up after dehydration to achieve the dielectric strength 60 KV at 4 mm gap complete complete all as specified and directed. Note:- Empty container shall be returned to contractor after use of oil

Supply and fixing in repair of breather assembly with 500 Grams silica gel blue in crystal for outdoor type transformers of any capacity upto 315 KVA complete all as specified and directed by Engineer-in-Charge.

Supply and fix in replacement Silica Gel blue in crystal complete all as specified and as directed by Engineer-in-charge.

Supply and fixing cork sheet gasket, 6 mm thick, superior quality, on top cover plate of the transformer upto 315 KVA after taking down/out gasket as existing at site complete all as specified and as directed.

Preparation of external surface of distribution transformer up 100 to 315 KVA capacity and applying one coat of synthetic enamel paint (grey) Ist quality as approved by GE/EIC with gun sprayer including marking of MES No/Transformer No etc., with enamel paint (white) complete all as specified and directed by Engineer in charge.

Supply and fixing in repair of thermometer (oil temperature gauge) for outdoor type transformer of any capacity upto 315 KVA, all as specified and directed by Engineer -in -Charge.

Supply and fixing in replacement 433 volt procelain bushing insulators for LT side of out door/ indoor type transformer of capacity capacity upto 315 KVA complete all as specified and as directed.

Supply and fixing in replacement 11 KV procelain bushing insulators for HT side of out door/ indoor type transformer of capacity capacity upto 315 KVA complete all as specified and as directed

Supply and fixing in replacement of worn out LT bush assembly made out of brass with heavy duty brass complete with brass spindle, nuts, bolts, washers etc without bushing insulators all as per existing size, shape and length, suitable for capacity upto 315 KVA capacity transformers complete all as specified and as directed.

Supply and fixing in replacement of worn out HT bush assembly made out of brass with heavy duty brass complete with brass spindle, nuts, bolts, washers etc without bushing insulators all as per existing size, shape and length, suitable for capacity upto 315 KVA capacity transformers complete all as specified and as directed.

Supply, fixing, testing and commissioning in replacement of air break gang operated device, triple pole mechanically operated outdoor type, mounted on and including 11 KV H.T. porcelain insulators and steel channel frame, GI operating rod, 25mm dia of suitable length with operating mechanism working from ground level, vertically operated including locking arrangement for operating handle, suitable for current rating upto 200 Amp, 11000 Volts working pressure all as specified and directed by Engr-in -Charge.

Material and labour for Polymer Disc type insulator, porcelain, vitreous145 mm high and 255mm dia ball and socket type, white, brown or green,suitable for 11000 Volt,and as directed by engineer in charge.

Supply and fixing HT lightning arresters 11 KV, expulsion type complete with all fittings, transmission class, discharge capacity 65 Kiloampere complete all as specified & directed.

Preparing surfaces of Two pole structure including cross arms, channels, clamps etc by scrapping old paints and applying two coats of aluminium paint and writing "HT" and Pole No in black paint etc complete all as specified and directed by Engr- in -Charge.all as directed by Engineer-in-Charge.

Supply & fixing outdoor type HT feeder pillar box made of CRCA sheet 3.15 mm thick, CPRI tested and angle iron frame of size 40mm x 40mm x 6mm, dust and vermin proof with front and rear opening, including provision for 03 Nos. aluminum busbar size 40mm x 10mm fixed on HT bushing and having suitable provision for connecting cable upto 120 sqmm 3 core complete with required foundation work, including painting with one coat of red oxide paint and two coat of exterior weather proof paint and making cable connection with appropriate size cable glands complete all as specified & directed.

Supply only Capacitor bank 3 KVAR, Heavy duty type,415Volts,50Hz AC supply in existing panel complete as specified and directed by Engr-in-charge.

Supply only Capacitor bank 5 KVAR, Heavy duty type,415Volts,50Hz AC supply in existing panel complete as specified and directed by Engr-in-charge.

Supply only Capacitor bank 7.5 KVAR, Heavy duty type,415Volts,50Hz AC supply in existing panel complete as specified and directed by Engr-in-charge.

Supply only Capacitor bank 10 KVAR, Heavy duty type,415Volts,50Hz AC supply in existing panel complete as specified and directed by Engr-in-charge.

Supply only Capacitor bank 25 KVAR, Heavy duty type,415Volts,50Hz AC supply in existing panel complete as specified and directed by Engr-in-charge.

Supply only Capacitor bank 50 KVAR, Heavy duty type,415Volts,50Hz AC supply in existing panel complete as specified and directed by Engr-in-charge.

Taking down old/unserviceable multi function power factor meter from existing APFC Panel and supply, fixing, commissioning multi function digital panel meter as existing & complete testing all as specilfied and directed.

Supply and fix in repair of following Spare parts suitble for ABB make RMU, 11 KV , 630 amps indoor type complete all as specified and directed by Engineer-in-Charge :-

Bushing 400 series bolted type

Shaft for operating handle

2 PA mechanism w/o hex rod

Push button red with label "O"

Push button red with label "I"

Capacitor unit, VPIS,9-15 KV without cord

Fuse holder assembly

Trip coil Only Y1 Control volt 24 VDC

Trip coil Only Y2 Control volt 24 VDC

O Ring 65 x 5 for LBS Mech Bushing

Spring charging motor with Gear 24 VDC

Electronic motor kit for C module - MGVL

Standard motorised kit for V module

Door interlocking assembly

WIKA Make manometer + Gas density switch

Taking down old/unserviceable multi function meter from existing ABB RMU panel and supply, fixing, commissioning multi function digital panel meter as existing & complete testing all as specilfied and directed.

Supply and fix ceiling mounted ABC powder based fire extinguiser with automatic detection and activation feature to prevent fire of capacity 5 Kgs complete all as specified and directed.

Supplying and laying synthetic Rubber insulated mats 2.5 mm thick for voltage upto 11 kv for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m complete all as specified and directed.

Supply and fix in replacement of HT route indicator duly painted with two coat of grey colour synthetic enamel paint duly pain over one coat of red oxide primer, oval shape of size 200mm x 150mm x 6mm thick cast iron disc with letters HT/LT ( as required on site, HT - Red colour) embosed and fixed on 25mm x 25mm x 5mm thick MS angle 50cm long including necessary PCC in 1:3:6 type C1 cement concrete and 15 cm thick plastering all around upto below ground level of size 650mm x 300mm x 250mm complete all as specified and directed.

Material and labour for earthing complete with galvanized steel earth plate electrode 60cm X 60cm X 6mm thick buried directly vertically in ground to depth not less than 2.25 mtr below ground level, with top edge of earth plate not less than 1.5 mtr below ground level surrounded from all sides by 15cm thick packed layer of Charcoal dust & common salt filled in alternate layers and electrode connected to galvanised iron strip 32×6 mm upto 7.5mtr long by means of bolts, nuts, check nuts and washers of galvanized iron and connection to earthing test point & earth dolly and including watering pipe medium grade GI 20mm bore & protection pipe light grade GI 15mm bore, including wire mesh, funnel, lugs, salt, charcoal dust, excavation in any type of soil, returning filling & removal of surplus soil upto 50 mtr, pit chamber shall be of PCC 1:2:4 type B1 using 20 mm graded mechnically crushed stone aggregates and pit cover slab 40mm thick shall be of Precast RCC 1:2:4 type B-1 using 20 mm graded mechnically crushed stone aggregates reinforced with XPM weighing not less than 4Kg/sqm including necessary form work complete all as shown in electrical plate No 3 of SSR part-I, including testing on completion at site complete all as specified and directed. Notes:- (i) On testing if the desired earth resistance is not obtained, earthing will be generated at no extra cost , till the desired earth resistance is obtained. (ii) The chamber shall be constructed atleast 1.5 mtr away from the earth electrode.

M&L installation, testing & commissioning in replacement of maintenance free UL approved copper bonded earth rod of 10 feet length (set of three), each 17.2 mm dia, made of high tensile low carbon steel rod, molecularly bonded with 99.9% electrolytic grade copper on outer surface (minimum copper bonding thickness - 250 microns) with exothermally jointed copper busbar of 50mm x 6mm x 200mm for connection. The rod and exothermic joint together successfully tested at 25 KA fault current by CPRI with 50 Kg Eco-friendly earth enhancing compound with each earth rod. The earth pit cover made of heavy duty poly plastic of high grade polypropylene with top dia not less than 250mm, bottom dia not less than 330mm and height not less than 260mm for each electrode pit. The compound should comply to IEC:62561-7 having passed leaching, corrossion, sulphur & resistivity test as per IEC: 62561-7 by NABL accredited Lab with FRP earth pit cover of top size lockable Lid. It includes GI Protection pipe light grade 40 mm bore with Copper strip of size 20mm x 3mm upto test point complete all as specified & directed. Make : OBO bettermen / Ennov /JMV

For Credit Schedule refer tender documents. The amount of credit schedule shall be deducted from total quoted amount of BOQ to arrive contract sum.

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