SPECIAL REPAIR/REPLACEMENT TO OLD TRANSFORMER AT SUBSTATION NO 1 AND 2 AT SITE P AT AF STN THANE UNDER GE (AF) THANE

Amount

Supplyy and fixing, testing and commissioning of step down transformer 250 KVA (IS-1180: 2016), 22000V/433V, 3 Phase, 50 C/S oil immersed, naturally cooled outdoor type transformer having no load voltage ratio 22000/433V, Vector group Dyn 11 with 21/2+5+71/2% tapping as under taken out on the HT side and connected to externaly hand operated 22 KV OFF circuit tap changing switch, HT winding connected in delta and LT winding connected in star and neutral brought out and connected to a separate terminal for earthing with outdoor open porcelain bushing on HV side and cable box on LV side with the tempreature rise not exceeding 40oC by thermo meter in oil and 45oC with first filing of oil with following (copper wound) complete with all connections complete all as specified and directed by Engr-in-charge. (a) 22 KV Externally hand operated OFF Circuit Tap Changing Switch locking device. (b) Oil conservator tank with drain plug and filling Cap (c) Silica gel dehidrating breather cahrged with silica gel (d) Oil level gauge (e) Oil filter valve (f) Oil Drain valve (g) Thermometer pocket (h) Diagram and rating plate (j) Two earthing arrangement (k) Lifting lugs (l) Four bidirectional plane roller (m) Air Vent Plug (n) Explosion Vent (o) Bare bushings on HV side (p) Cable box on LV side (q) Additional neutral terminal brought outside the LV cable box for earthing

Supplyy and fixing, testing and commissioning of step down transformer 315 KVA, (IS-1180:2016), 22000V/433V, 3 Phase, 50 C/S oil immersed, naturally cooled outdoor type transformer having no load voltage ratio 22000/433V, Vector group Dyn 11 with 21/2+5+71/2% tapping as under taken out on the HT side and connected to externaly hand operated 22 KV OFF circuit tap changing switch, HT winding connected in delta and LT winding connected in star and neutral brought out and connected to a separate terminal for earthing with outdoor open porcelain bushing on HV side and cable box on LV side with the tempreature rise not exceeding 40oC by thermo meter in oil and 45oC with first filing of oil with following (copper wound) complete with all connections complete all as specified and directed by Engr-in-charge. (a) 22 KV Externally hand operated OFF Circuit Tap Changing Switch locking device. (b) Oil conservator tank with drain plug and filling Cap (c) Silica gel dehidrating breather cahrged with silica gel (d) Oil level gauge (e) Oil filter valve (f) Oil Drain valve (g) Thermometer pocket (h) Diagram and rating plate (j) Two earthing arrangement (k) Lifting lugs (l) Four bidirectional plane roller (m) Air Vent Plug (n) Explosion Vent (o) Bare bushings on HV side (p) Cable box on LV side (q) Additional neutral terminal brought outside the LV cable box for earthing

M&L for earthing complete with copper earth plate electrode 600x3.15mm buried directly in ground with top edge of the plate not less than 1.5 mtrs below normal ground level and connected to earth test point by means of copper strip of size 20x3 mm all as specified and shown electric plate no 3 of MES SSR Part-I 2009 including earthowrk, PCC chamber, PCC chamber, CI cover, protection and watering pipe, funnel, mesh etc all as required at site complete all as specified and directed by Engr-in-charge . Note:- (i) 7.5 RM Copper strip in deemed to be included in quoted rates beyond 7.5 RM strip shall be measured and paid separately. (ii) Earth resistance of earth pit should be less than 0.5 Ohms. On testing after completion if the desired earth resistance is not obtained the earthing will be redone at no extra cost. (iii) Rate quoted by the tenderer is deemed to include slat & charcoal upto & above 450mm top of Copper Plate.

M&L Copper Strip 32x6mm burried in ground complete all as specified and directed by Engr-in-charge

Supplying, jointing and commissioning indoor/outdoor type cable end termination jointing kit heat shrinkable type suitable for under ground XLPE cable size 3 core 95 Sqmm HT Cable complete all as specified and directed by Engr-in-charge

Supplying, jointing and commissioning outdoor type cable end termination jointing kit heat shrinkable type suitable for under ground XLPE cable size 3 core 150 Sqmm LT Cable complete all as specified and directed by Engr-in-charge

M&L test point terminal block made of gun metal or phosphorus bronze size 5x75x25mm drilled and screwed including 3 Nos 8mm dia 25mm long hex. Head screw complete complete all as specified and directed by Engr-in-charge

Veer High Tech Solution