CWE/CHD-86/2020-21 REPAIR AND MAINT OF TRANSFORMERS HT VCBs/OCBs, HT UG CABLE AND ALLIED WORKS AT K AREA UNDER GE CHANDIGARH

Amount

Excavation in trenches in any type of soil not exceeding 1.5 metre deep and not exceeding 1.5 mtr width and getting out soil including forming bottom surface to required slope/gradient for laying cables/pipes etc. all as specified and directed by Engineer-in-Charge including removing cable protection PCC covers/ bricks & stacking serviceable covers / bricks for reuse and disposal of unserviceable covers within 50 m all as directed. Note : (i) Excavation shall be made carefully in order to avoid damage of existing cables and protection covers.(ii) The excavation work may be carried out in short lengths for locating fault in under ground cables at different locations.

All as per item no 1 above but exceeding 1.5 mtr depth and not exceeding 3 mtr depth complete all as specified and directed.

Returning, filling in (soils) including spreading, leveling, watering and well ramming in layers of 25 cm thick after the cables etc. are laid, jointed and tested complete all as specified and directed by Engineer-in-Charge.

Removal of surplus excavated spoil (Soils) not exceeding 50 Mtr distance and depositing where directed by Engineer-in-Charge at a level not exceeding 1.5 mtr above the starting point complete all as specified and directed.

Material & labour for sand filling with clean dry fine sand unwashed including gently punning around cables in trenches/ducts for cable protection complete all as specified and directed by Engineer-in-Charge.

Supplying & Laying un-reinforced pre cast flat concrete cable protection cover of class HV, type I, size 300mm x 180mm x 40mm, factory made, complete all as specified and directed by the Engineer-in-Charge.

Disconnecting and taking out old existing unserviceable/ corroded GI tubing 100mm bore of any description and Supplying, laying & jointing GI tubing, 100 mm bore, Light grade as in sleeving etc laid in trenches / ducts / horizontal bore hole/ along pole complete all as specified and directed by Engineer-in-Charge.

Disconnecting and taking out old existing unserviceable/ corroded GI tubing 80mm bore of any description and Supplying, laying & jointing GI tubing, 80 mm bore, light grade as in sleeving etc laid in trenches / ducts / horizontal bore hole/along pole complete all as specified and directed by Engineer-in-Charge.

Taking out existing damage/unservisable PVC\Pilca insulated, armoured, aluminium conductor 11000V grade cable of any size and core from trenches, pipes, walls and/or poles, complete all as specified and directed.

Supply ,laying, jointing and testing 11 KV (Earthed), aluminum conductor, screened, XLPE insulated, armoured shielded and PVC sheathed cables conforming to IS 7098 (Part-II) amended upto date having cross sectional area 120 Sqmm 3 core complete all as specified and directed by the Engineer-in-Charge. Note :- Earth work, sand cushioning, pipe and PCC cable protection cover shall be measured and paid separately).

All as per Item No. 10 above but cable of size 95 Sqmm 3 core complete all as specified and directed.

M& L for Boring of holes under road, pavement, hard standing by trenchless technology using ultra sounding technique and necessary machine including HDPE pipe of 150 mm dia suitable for 0.4 mpa working pressure complete all as specified and directed.

M&L for Cement concrete 1:4:8 type D-2 using 40 mm graded crushed stone aggregate in foundation filling & mass concrete for poles/struts/stays assembly including provision of necessary form work complete all as specified and directed.

M&L for Cement concrete 1:3:6 type C-1 using 20 mm graded crushed stone aggregate in coping/padestal to poles including provision of necessary form work finishing the exposed surface even and smooth in cement mortar 1:3 and applying two coats of white wash complete all as specified and directed.

M&L for HT cold shrinkable type straight through cable jointing kit with jointing material and accessories suitable for 11000 volt (Earthed) grade XLPE cable of size 95 Sqmm, 3 core complete all as specified and directed.

M&L for HT cold shrinkable type straight through cable jointing kit with jointing material and accessories suitable for 11000 volt (Earthed) grade XLPE cable of size 120 Sqmm, 3 core complete all as specified and directed.

M&L for HTcold shrinkable type indoor type joint end termination cable jointing kit with jointing material and accessories suitable for 11000 volt (Earthed) grade XLPE cable of size 95 Sqmm, 3 core complete all as specified and directed.

M&L for HT cold shrinkable type indoor type joint end termination cable jointing kit with jointing material and accessories suitable for 11000 volt (Earthed) grade XLPE cable of size 120Sqmm, 3 core complete all as specified and directed.

M&L for HT cold shrinkable type outdoor type joint end termination cable jointing kit with jointing material and accessories suitable for 11000 volt (Earthed) grade XLPE cable of size 95 Sqmm, 3 core complete all as specified and directed.

M&L for HT cold shrinkable type outdoor type joint end termination cable jointing kit with jointing material and accessories suitable for 11000 volt (Earthed) grade XLPE cable of size 120 Sqmm, 3 core complete all as specified and directed.

Dismantling and taking down carefully any type of pole complete all as spcified and directed.

Supply and erecting 11 metre long ,Steel tubular swaged poles complete with and including cast iron/mild steel base plate, finial taper plug, bolts, nuts & washers etc as specified type 410 SP-55 conforming to IS 2713 including drilling of necessary holes including painting to poles up to 1200 mm height (from top of PCC coping) with two coats of synthetic enamel paint in alternate strips 300 mm high each in yellow and black paint and rest exposed surface of pole with two coats aluminium paint over a coat of red oxide zinc crome primer and black bituminous paint on embeded portion of pole including numbering on poles complete all as specified. Note : Excavation & earthwork, foundation concrete will be meaured & paid for separately under respective item(s) of schedule A.

Dismantling cross-arms of M.S. channel or angle sections etc. complete all as specified and directed.

M&L for Cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending (cold or hot), drilling holes for bolts, bent to any shape or size as directed and inclusive of one primer coat of red oxide, one under coat of zinc oxide and one finishing coat of aluminium paint complete all as specified.

Supply and fix Disc type insulator, porcelain, vitreous 145mm high and 255mm dia ball and socket type, white, brown or green: ‘single disc' assembly for tension with tension clamps for conductors, working pressure 11000 volts IN REPAIR complete all as specified.

Supply and fix Pin type insulator, porcelain, vitreous 150mm high and 150mm dia ball and socket type, white, brown or green: ‘single disc' assembly for tension with tension clamps for conductors, working pressure 11000 volts IN REPAIR complete all as specified and directed.

Supply and fix in repair Switches air break gang operated,(GO & DO complete assembly) , mechanically operated, mounted on 12 insulator and steel frame, with operating mechanism worked from ground level, for current rating upto 400 amp, 11000 volt and testing on completion complete all as specified and directed.

Danger notice plate of 1.6mm thick mild steel sheet, vitreous enamelled white, with letters, figures and conventional skull and bones in signal red colour and fixed with M.S. clamps, bolts and nuts of approved size, for HT, 25x20cm size,complete all as specified and directed.

Supply and fix in repair Lightning arrester single pole zinc oxide (Gap less) surge type suitable for use in effectively earthed system with nominal voltage 12 KV and shall comply with IS : 3070 (part -3) 1993 complete all as specified and directed.

Locating of HT 11 KV under ground cable fault by using/providing fault locating machine (hiring of machines) at K Area complete all as specified and directed.

Supply and fix 25mm bore Gun-metal, globe or gate valves, with iron wheel head, ISI marked, screwed both ends for iron pipe, IN REPAIR, complete all as specified and directed.

S&F 32mm bore Gun-metal, globe or gate valves, with iron wheel head, ISI marked, screwed both ends for iron pipe, IN REPAIR, complete all as specified and directed.

S&F 40mm bore Gun-metal, globe or gate valves, with iron wheel head, ISI marked, screwed both ends for iron pipe, IN REPAIR, complete all as specified and directed.

Testing of Earth resistance with a caliberated earth megger after disconnecting the same from the equipment in presence of MES rep for all electrical equipments at sub stations and writing the result on the earth cover with black paint and in a separate earth test register including connecting the same after testing complete all as directed.

Material and labour for earthing complete with galvanized steel earth plate electrode 600mm X 600mm X 6mm buried directly in ground vertically to a depth not less than 2.25 meter below normal ground level (with top edge of earth plate not less than 1.5 meter below ground level) connected to GI strip 32x6mm main earthing lead by means of galvanized bolts, nuts and washers with connected to earth test point & to main switch board /panel etc. all as specified and testing on completion with and including necessary excavation and earth work in any type of soil, earth electrode, earthing lead from electrode to equipment/substation/panel etc, adequate quantity of charcoal dust and common salt, test point terminal block made out of phoshper bronzein sheet steel box, PCC (1:3:6) type C-1 (using 20mm graded black trap/granite/Basalt stone aggregate) for earth pit with 40 x 40 x 6mm mild steel angle iron frame for cover, pre cast RCC (1:2:4) type B-1 (using 20mm graded black trap/granite/Basalt stone aggregate) 40mm thick cover reinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia round bar handle, GI light grade watering pipe 20 mm dia bore with funnel and wire mesh, and 40 mm dia bore GI light grade earth lead protection pipe, complete all as specified and directed.

Disconnecting defective outdoor/ indoor power distribution transformer of capacity 50 KVA to upto and including 200 KVA from HT/ LT sides draining out complete transformer oil & storing the same in suitable containers ( to be arranged by contractor ) opening the top cover and lifting up the core assembly carefully to check the condition of transformer winding core retanking the same after repair refilling the transformer oil after dehydration and filteration (dehydration and filteration to be paid separately) including checking of leakage of transformer body and welding works required for making transformer body leak proof transportation of transformer to and from site to work shop and re-installation the same at any site complete all as specified and directed.

Disconnecting defective outdoor/ indoor power distribution transformer of capacity 250 KVA to upto and including 500 KVA from HT/ LT sides draining out complete transformer oil & storing the same in suitable containers ( to be arranged by contractor ) opening the top cover and lifting up the core assembly carefully to check the condition of transformer winding core retanking the same after repair refilling the transformer oil after dehydration and filteration (dehydration and filteration to be paid separately) including checking of leakage of transformer body and welding works required for making transformer body leak proof transportation of transformer to and from site to work shop and re-installation the same at any site complete all as specified and directed.

M&L for replacement of burnt /defective HT copper coil with new one made out of super enamelled heavy duty copper wires of size matching to the existing one including varnishing, drying and insulating material in transformer complete all as specified and directed.

M&L for replacement of burnt /defective LT copper coil with new one made out of super enamelled heavy duty copper wires of size matching to the existing one including varnishing, drying and insulating material in transformer complete all as specified and directed.

M&L for Replacement of existing defective HT tap changer of suitable size with tapping arrangement 2.5%to 7.5% and one normal tapping including connecting up with HT coil and testing of transformer capacity up to 200 KVA complete all as specified and directed.

M&L for replacement of existing defective HT tap changer of suitable size with tapping arrangement 2.5%to 7.5% and one normal tapping including connecting up with HT coil and testing of transformer capacity 250 to 500 KVA complete all as specified and directed.

M & L for replacement of synthetic rubberised cork sheet gasket 1/4" thick suitablefor main body top cover of transformer. Capacity up to 200 KVA complete all as specified and directed.

M & L for Replacement of synthetic rubberised cork sheet gasket 1/4" thick suitable for main body top cover of transformer. Capacity 250 to 500 KVA complete all as specified and directed.

M&L for replacement of defective/ cracked HT porcelain bushing (set of three) of suitable size for transformer upto 200 KVA including washers of good quality complete all as specified and directed.

M & L for Replacement of defective/ cracked HT porcelain bushing (set of three) of suitable size for transformer above 250KVA and upto 500 KVA including washers of good quality complete all as specified and directed.

M&L for replacement of defective/ cracked LT porcelain bushing (set of four) of suitable size of transformer upto 200 KVA including washers of good quality complete all as specified and directed.

M&L for replacement of defective/ cracked LT porcelain bushing (set of four) of suitable size of transformer above 250KVA and upto 500 KVA including washers of good quality complete all as specified and directed.

Supply and fix in repair HT bush rod made out of copper with brass nuts and washers of required length and dia (as per existing) including connecting up with HT coil of transformer upto 200 KVA complete all as specified and directed.

Supply and fix in repair HT bush rod made out of copper with brass nuts and washers of required length and dia (as per existing) including connecting up with HT coil of transformer above 250KVA and upto 500 KVA complete all as specified and directed.

Supply and fix in repair LT bush rod made out of copper with brass nuts and washers of required length including and dia (as per existing) connecting up with LT coil of transformer upto 200 KVA complete all as specified and directed.

Supply and fix in repair LT bush rod made out of copper with brass nuts and washers of required length including and dia (as per existing) connecting up with LT coil of transformer above 250KVA and upto 500 KVA complete all as specified and directed.

Supply and fix in repair breather with transparent body of suitable size duly filled with fresh silica gel complete for transformers of cap 250 KVA upto 500 KVA complete all as specified and directed.

Supply and fix in repair breather with transparent body of suitable size duly filled with fresh silica gel complete for transformers of cap upto 200 KVA complete all as specified and directed.

M&L taking down silica gel container from transformer and heating the silica gel at sufficient temperature to remove the moisture from it including refiting the same as per position complete all as specified and directed.

Testing of transformer oil of each transformer before and after dehyderation and filteration of transformer oil , installed in different sites for its dielectric strength and other chemical properties and submitting the test report to the department.complete all as specified and as directed. Note : 1. Contractor shall arrange the oil testing machine and install at MES complaint cell of respective area. 2. Oil sample shall be collected from transformer in a air tight container and shall be tested at MES complaint cell of respective area in presence of MES rep.

Dehydration and filteration of existing transformer oil using transformer oil filteration plant to eliminate foreign particles and to improve di-electric strength upto 50 KV at 2.5mm electrode gap and to bring the acidity within the permissible limit complete all as specified and directed.

Supply and filling transformer oil for topping up the level of oil/ new filling, having dielectric strength 40 - 60 KV during filling after initial filteration, conforming to relevent IS-335 (Transformer oil to be supplied in sealed container) complete all as specified and directed.

Painting of transformer upto 200 KVA capacity with good quality synthetic enameled paint using spray gun with compressed air on complete external portion of transformer including preparation of surface by scrubbing, cleaning ,stains greasy spots, dusts etc, The painting of transformer shall be carried out in situ ie. on four pole structure or in sub station at different places including writting SM/MES number complete all as specified and directed.

Painting of transformer above 250KVA and upto 500 KVA capacity with good quality synthetic enameled paint using spray gun with compressed air on complete external portion of transformer including preparation of surface by scrubbing, cleaning ,stains greasy spots, dusts etc, The painting of transformer shall be carried out in situ ie. on four pole structure or in sub station at different places including writting SM/MES number complete all as specified and directed.

Repair to arresting of leakage / replacement of worn out spindle (rod) / bushing/ tap changer etc of any capacity transformer indoor/ outdoor type of any make & model, in position by disconnecting electric connection as required from HT/LT side cable box or bushing or jumper, opening of top cover with the help of mechanical Machine/ men power, drain out tranformer oil up to required level and to replace worn out spare / component with new one including replacement of UNSV gas kit set of top cover and making necesary inetrnal & external connection, refilling drain out oil etc complete all as specified

All as per item No 60 here in before but arresting of oil leakages from body / tubes fins etc. Note for item No 60 & 61any spares required will be measure paid under respective items of this schedule complete all as specified and directed.

M&L PG clamp suitable for upto 50 Sqmm copper conductor in repair complete all as specified.

Disconnecting the exsiting 11 KV outdoor type gang operated air break switch carring out the repairs which includes changing the flexible copper strip of rating 75 Amp capacity, changing the Male/Female contacts, springs, greasing , welding & drilling work etc refixing in position & testing to check the system on full load complete all as specified and directed. Note : - (a) Contractor should visitied the site to assess the repair involved before quoting the rate . (b) Spares / material required in repair will be masured & paid sparely under relvent item as the supply only.

Supply only post top insulator suitable for 11 KV Air brake swicth 11 KV Drop out fuse complete all as specified and directed.

Suppy only Tinned copper flexible strip (Jumper) suitable for 11 KV Air brake Switch complete all as specified and directed.

Supply only male contact for 11 KV Air brake switch complete all as specified and directed.

Supply only female contact for 11 KV Air brake switch complete all as specified and directed.

Supply only MS Strip operating mechanism (Jumper Carrier) for GOD insulator complete all as specified and directed.

Supply only terminal clamp suitable for 11 KV out door AB switch complete all as specified and directed.

Supply and fix MS sheet 5 mm thick for transformer HT/ LT side cable box cover ,including cutting as per site requirement, drilling, welding, painting with two coat good quality synthetic enameled paint over a coat of primer complete all as specified and directed. Note: MS box cover shall be provided with PU gasket and suitable size cable gland to ensure IP 66 protection. Rate quoted deem to be included in item rate.

Supply and fix MS bolt fully threaded with nut and washer off sizes with zinc oxide coated complete all as specified and directed.

Material & labour for supply and fixing of aluminium conductor, steel reinforced (ACSR) of any size/description on HT poles/lines including stringing, tightening, binding to insulators with aluminium wire making and connecting jumpers, connections etc including connecting, commissioning and testing and taking down old unserveiceable complete all as specified & directed by Engineer-in-Charge.

Renewal of old burnt out ACSR jumper at two pole/four pole structures complete all as specified and directed. Note : ACSR required for renewal of jumpers shall be measured and paid separately.

Disconnecting and taking out existing unserviceable current transformer of any description and in any position and Supply, installation, commissioning and testing of indoor epoxy type 11 KV current transformer having ratio of 100-5-/5A having protection core class 1P10, IL-28/75kv burden of 10 VA and breaking cap of 18.4 KA for 1.0 second all as specified and directed.

All as per item ser No 74 here in before but CT ratio 60/1A and 2.5VA complete all as specified and directed.

All as per item ser No 74 here in before but CT ratio 40/1A and 2.5VA complete all as specified and directed.

Disconnecting and taking out old U/S battery charger and Supply ,Installation, Testing and commissioning of 24 Volt DC ,low maintenance type chargeable stationary battery set comprising of 12 cells of 02 volts each having 100 Amp hour capacity batteries including battery charging set of adequte capacity and control equipment in sheet steel cabinet of 2.0 mm Thick floor mounted type suitable for input of 230 volts single phase 50 Hz AC complete with internal & External wiring of all components accessories, all as specified for 11 KV VCB panels, with complete control wiring (for connecting the DC tripping system to HT 11 KV VCB panel board of TOP K AREA complete )wiring shall be of copper conductor single core and size not less than 2.5 Sqmm complete. (control wiring up to VCB panel shall be inclusive in this item).

Taking down the existing relays (Three phase over current and earth fault relays) fixed in 11KV HT panels and replace new (Three phase over current and earth fault relays) model No M 61 A Aux supply 110 volt with (2NO+2NC) CT rating current 1 Amp to 5 Amp complete cat part No MC61AAXX001 of L&T or equivalent make specified in Appx 'B' complete all as specified and directed.

Servicing, caliberation and testing of VCB – 01 Nos indoor type along with control panel and control wiring protection system and relays by primary & secondary injection system all as directed including testing of battery bank/battery charges/ DC system, rectification of fault if any all as specified and directed. at 11 KV TOP (K Area) Make: Seimens/ABB

Disconnecting & taking out non functional VCB of any description and any make of rating 11 KV, 400 Amps/630 Amps dismantling / opening of the VCB for servicing / overhauling, taking out and removing unserviceable/defective parts including cleaning & servicing, greasing, oiling of the parts etc and replacement of unserviceable parts with new one, reassembling the VCB after overhauling / servicing and its testing complete all as specified and directed by Engineer-in-Charge. (Note :- The quoted rates of the contractor includes for fixing the serviceable parts in position and replacement of unserviceable parts with new parts. The new replaced parts shall be measured and paid for separately under appropriate item of Sch `A’ as `supply only)

Supply only Vaccum interrupter (Vacum bottle) type WL -33379 for VCB, 400/630 Amps capacity indoor type of Note :(i) Fixing & testing element of items ser No 82 to 89 is deemed to be included under respective item . (ii) Quantity of these items is tentative and contractor shall have no claim on account of variation of quantity or non execution of any of the item.

Supply only flexible connectors Cat No. 531 complete all as specified and directed.

Supply olny Closing coil assembly 30 Volt to 110 Volt complete all as specified and directed.

Supply only Tripping coil assembly 30 Volt to 110 Volt complete all as specified and directed.

Supply only LED Indicator lamp (RYG) 110 Volt complete all as specified and directed.

Supply only LED Indicator lamp (RYG) 30 Volt complete all as specified and directed.

Supply only Heating element with thermostat switch 150Watt compact type complete all as specified and directed.

Supply only Operating handle for trolly, lowering/raising suitable for any capacity of VCB as per sample complete all as specified and directed.

Supply only Gear assembly suitable for VCB 400/630 Amp Make ABB/Scheinder or equivalent complete all as specified and directed.

Material and labour for spreading and levelling stone aggregate 63 mm 150 mm average thickness around transformer, two pole/four pole structure including removing of grass and bushes from roots of the area complete all as specified and directed.

M & L continous brick edging with sub class B bricks of old size laid with width equal to the width of the brick, laid dry on end vertically complete all as specifiecd and as directed.

Supply only tinned copper fuse wire 18/20 SWG complete all as specified and directed.

M&L for anticlimbing devices, spike type fabricated out of MS bars (round square and flat) including nuts, bolts washers and welding in tow halves made to shape to suit the cross section of the HT Pole complete all as specified and directed.

M&L Galvanised steel wire for making craddle , hexagonal/Rectangular, fabricated with 4 mm dia across span complete all as specified and directed.

S&F stay assembley comprising of 7/3.15 mm galvansied MS stranded wire of required length fixed to pole with and including flat iron clamps fabricated out of 50 mm X 6 mm flat iron and nuts , bolts and washers of suitable sizes including painting with two coat of aluminium paint over a coat of red oxide as primer, GI stay rod 20 mm dia 1850 mtr long MS stay plate GI 300 mm x 500 mm and clearnace dia of loop type insulator hole 25.5 mm suitable for HT/LT poles all as specified and directed by Engr- in-Charge. Note :- Excavation earth work and concrete work, clamps stay wire insulator shall be measured and paid separetly undr relevent item of this schedule.

M&L cable route indicator for HT 11 KV cable of size 4" dia Round plate with stand of angle Iron duly marked with HT 11 KV /MES including necessary PCC for fixing complete all as specified and directed.

Material and labour for cleaning and preparation of all existing steel surfaces of straight steel tubular poles 11mtrs long for painting including mild steel cross arms, clamps and street light brackets, MS boxes etc and applying one cost of aluminium paint all round the exposed steel surfaces of existing steel tubular poles of any description and in any position above the height of 1.50 mtr from the plinth of the pole and applying one coat of synthetic enameled paint of different colours in strips of 150mm width upto the height 1.5 mtr from the plinth of pole including writing pole No and other sign works with white paint over black painted base in the pattern and style as approved by the Engineer-in-Charge complete all as specified & directed. Note : Size of black painted base for numbering shall be 100mmx25mm and the size of numbers shall be not exceeding 10cm height.

Cutting & trimming of tree trunks / branches of grith not more than 80 mm falling on or likely to fall on LT over head electrical lines for a clearence of 6 meter on ground from the nearest counductor / pole /earth etc. & desposal of unservicable materials to distance not exc. 50 mtrs. & clearing of site all as directed by Engg.-In- Charge.

LONGIA ENGINEERS

Bharat Enterprises

Ess Ess Engineers