87660 SPECIAL REPAIRS FOR REPLACEMENT OF BER DECLARED AVR AT MRS UNDER GE (M) NAS ARAKKONAM

Amount

Disconnecting 11KV HT/LT cable connections and earthing connections of AVR and transformer carefully and taking down the existing BER declared HT AVR and unserviceable HT AVR indoor type including transformers of rating 1000 KVA 11 KV HT from the existing position carefully, including transporting, labour, use of crane as applicable for loading and unloading and shifting including removing old unserviceable HT cable and depositing to MES store yard and removing old unserviceable interconnecting LT cables and earthing material as specified and directed and making good the disturbed surfaces floor/duct/wall etc to match with the existing adjacent surfaces complete all as specified and as directed.

Supply, Installation, Testing and Commissioning of HT 11 KV, 3 Phase, 50 Cycles Outdoor type, Copper wound with Class ‘A’ insulation. On load step less rolling contact type voltage regulator, auto wound delta connected booster transformer double wound open/open automatic control gear consist of one electronic relay design AVR 2000 KVA, oil cooled with input 9 KV to 12 KV and output 11 KV + 1% with lifting lugs. Swivel type rollers. Two Nos earthing terminals, rating plates indicating details, Buck holz relay, first fill of oil, oil and winding temperature gauge, Alarm and LED lamp indicating Input Voltage exceeding specified range complete and including necessary interconnection LT UG Cable of AVR & Booster Transformer with necessary PCC M-15 type B1 platform of standard size for Installation as per manufacturer instruction all as specified and as directed with following specification :-

Motor Control Raise / lower push button control by means of small single phase reversible geared motor of the permanent capacitor type shall be provided. The limit switches shall be provided to restrict the travel at extreme position with this arrangement, it wound also be possible to provide remote control of the Regulating unit. The reversible geared motor wound of ‘STEP-SYN’ type. Automatic Control Automatic correction of fluctuating supply voltage are shall provide electronic relay which will sense the output voltage and provide signal to the driving motor for necessary corrections.

Supply, laying and testing XLPE insulated screened PVC bedded, galvanized steel strip or wire armoured, electric power cables (Heavy duty) with aluminium conductor, 11000 volts grade (HT) earthed of cross sectional area 185 sqmm 3 core conforming to IS-7098 (Part-II) with latest amendments, in trenches or fixed on wall in position, complete all as specified and as directed.

Supply, laying and testing XLPE insulated screened PVC bedded, galvanized steel strip or wire armoured, electric power cables (Heavy duty) with aluminium conductor, 1100 volts grade (LT) earthed of cross sectional area 300 sqmm 3.5 core, in trenches, or fixed on wall in position, complete all as specified and as directed.

Supply, laying and testing XLPE insulated screened PVC bedded, galvanized steel strip or wire armoured, electric power cables (Heavy duty) with aluminium conductor, 1100 volts grade (LT) earthed of cross sectional area 120 sqmm 3.5 core, in trenches, or fixed on wall in position, complete all as specified and as directed.

Supply and fix cable jointing kit for 11 KV grade cable for indoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured AI conductor cable of size 185 Sqmm complete all as specified and as directed

Supply and fix cable jointing kit for 11 KV grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 185 Sqmm complete all as specified and as directed

Supply and fix 20X3mm copper strip on pole/buried into ground complete all as specified and as directed

Material and labour for Earthing complete with using copper earth plate electrode of size 600mm x 600mm x 3.15 mm thick buried directly underground vertically (earth pit not less than 2.25m deep below normal ground level) with top edge of the plate at a depth not less than 1.5m below ground level connected with and incl copper strip 20x3 mm including 40 mm dia GI pipe light grade by means of nuts bolts, washers and copper earth strip protected by GI pipe light grade 40 mm bore up to 7.5 mtr and connecting to AVR / VCB's / transformer etc, as per site requirement necessary earth work in any type of soil PCC (1:3:6) type C1 chamber and RCC (1:2:4) type B-1 cover and watering pipe 20 mm dia medium grade with funnel complete with mesh, refilling with soil all as specified complete all as specified and as directed

Note for Earthing work:- (i) Quoted rate deemed to include necessary earth work PCC chamber, RCC cover, reinforcement, removal of surplus soil , site clearance etc. (ii) Copper earth strip , GI Pipe 40 mm light grade 7.5 mtr and GI Pipe 20 mm medium grade 1.50 mtr deemed to be included the rate quoted by the contractor. (iii) Beyond 7.5 M the copper earth strip & GI pipe light grade 40 mm dia shall be measured and paid separately under the respective item of the schedule (iv) Quoted rate include testing after completion from test point and the desired earth resistance shall be not more than 2 ohm .If the desired result is not obtained the earthing will be re-done by the contractor at no extra cost.

Excavation in trenches, not exceeding 1.5m wide and not exceeding 1.5m in depth for foundation etc and getting out for soft/loose soil complete all as specified and directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25cm for soft/loose soil complete all as directed.

Removing excavated material not exceeding 50m and depositing where directed at a level not exceeding 1.5 m above the starting point complete all as directed.

Supply and lay standard size common burnt clay building bricks sub class 'B' for cable protection, laid dry complete all as specified and directed.

Supply and spread riddled earth for UG cable cushioning including punning on top and bottom of the cable complete all as specified and directed.

Material and Labour for tubes light grade galvanised iron pipes of 40 mm sizes with all fittings and fixed to wall/ pole / under road / culvert / drain or laid in floors, complete incl taking the corroded all as specified and directed.

Surface excavation strictly manually without damaging any electric LT /HT, route indicators and earthing pits etc not exceeding 30 cm deep and average 18 cm deep and getting out in soft/loose soil including removing green vegetation, roots, bushes in the substation area and near installations fencing area etc. complete all as specified and directed

Excavating in post holes (or similar holes) each not exceeding 0.5 cum, getting out, returning, filling in and ramming earth or broken rubble mixed with earth around, in layers not exceeding 25 cm, in hard/ dense soil complete all as specified and directed .

Material and labour for cement concrete type D2 1:4:8, (Using 40mm graded stone aggregate) in foundations, filling and mass concrete complete all as specified and as directed by Engr-in-charge.

Supply and Fix Steel work in tubular trusses including special shaped washer etc. complete using ERW or induction butt welded tubes conforming to I. S.1161-1979 grade St.-240 complete all as specified and as directed by Engr-in-charge.

Supply and Fix wind ties for roof including securing bolts, posts and struts, including cutting tops to shape as directed, drilling holes, bolting or riveting etc and similar work conforming to Fe-290 Gde E-165 complete all as specified and as directed by Engr-in-charge.

Supply and Fix Pre-painted galvalume aluminium zinc coating GI based corrugated steel sheet 0.50mm thick of an colour having tensile strength of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws complete all as specified and as directed by Engr-in-charge.

Supply and Fix Pre-painted galvalume aluminium zinc coating GI based Plain steel sheet 0.50mm thick of any colour having tensile strength of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws complete all as specified and as directed by Engr-in-charge.

Surface excavation not exceeding 30cm deep and averaging 15cm deep and getting out in hard/dense soil complete all as specified and as directed by Engr-in-charge.

Material and labour for 100mm cement concrete type D-2, 1:4:8 (40mm graded aggregate) complete all as specified and as directed by Engr-in-charge.

Material and labour Hard core of Gauge not exceeding 63 mm filling under floors or in foundations not exceeding 15mm thick including watering and consolidation complete all as specified and as directed by Engr-in-charge.

Material and labour Sand filling under floors or in foundations including watering and consolidation complete all as specified and as directed by Engr-in-charge.

Material and labour for 70 mm thick PCC 1:2:4 type B1 (20 mm graded aggregate) as in flooring complete all as specified and as directed by Engr-in-charge.

Material and labour for two coats of synthetic enamel paint over one coat of red oxide priming including preparation of new steel surfaces over 10 cm in width or girth, not otherwise described complete all as specified and as directed by Engr-in-charge.

Veera Electrical

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