Spl Repairs for Upgradation of Transformer from 160 KVA to 300 KVA in TA Bn at Palma under AGE I CIF R

Amount

Supply installation testing and commissioning of outdoor transformer 300 KVA AN, oil type transformer with corrugated off circuit tap links of rating +7.5% to -7.5% @ 2.5% by means of hand operated off load tap changing gear 300 KVA capacity transformer copper wound step down outdoor type 11000/433 Volt (at no load) double wound oil immersed naturally cooled with external cool tubes core type delta connected on primary side (HV) and star connected on secondary side (LV) in accordence with vector symbel Dy-II (vector group) with neutral brought on secondery side (LV side) and having tappining with at +/- 2.5%/5.0% and 7.5% to be changed to maximum temperature rise should not exceed 40 degree centigrade in oil and 50 degree centigrade in HV/LV winding when measured by resistance method after continues full load run in ambient temparature of 40 degree centigrade and the transformer shall be comprised with the following standard fittings. (a) Pressure release valve (b) Themometer pocket on tank cover (c) Oil temparature indicator (d) rating plate with terminal marking (e) Two earthing terminals on tank and cover to facilitate fixing of GI earth strip (f) Conservator with oil guage (g) Oil drain filter valve (h) Lifting lugs (j) Oil filter hole with cap/plug including connection complete (k) Four plain solid cast steel detachable rollers. (l) First fill of transformer oil confirming to relevant IS and testing up to 60 KV dielectric strength.

Supply and laying GI tubing 80mm dia light grade laid in trenches/floor/fixing on pole / wall / in tarmac including necessary fittings etc.complete& all as specified and directed.

Supply, laying, testing and comissionong HT XLPE insulated, screened, PVC bedded, galvonised steel strip or wire armoured, electric power cable (heavy duty) with aluminium stranded conductor, 11000 volts, grade cross sectional area 3 core 95 sqmm complete all as specified and directed.

Supply, laying, testing and comissionong LT XLPE insulated, screened, PVC bedded, galvonised steel strip or wire armoured, electric power cable (heavy duty) with aluminium stranded conductor, 1100 volts, grade cross sectional area 3.5 core 240 sqmm along with cable glands and aluminiun lugs at LT panel and transformer etc complete all as specified and directed.

All as per Item No 4.00 here-in-before but 120 sqmm 3.5 core -ditto-.

All as per Item No 4.00 here-in-before but 95 sqmm 3.5 core -ditto-.

All as per Item No 4.00 here-in-before but 50 sqmm 3.5 core -ditto-.

Cable jointing kit for 11 KV (earthed) grade cable for outdoor termination heat shrink type joint compelete with jointing material and accessories suitable for 3 core XLPE armoured conductor cable of size 95 Sqmm.

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

Excavation in trenches not exceeding 1.5 m wide and exceeding 1.5 m in depth and getting out in hard / dense soil for foundation of pole, stay, laying of cable and pipe etc complete all as specified and directed.

Returning and filling in including ,spreading and well ramming in layers not exceeding 25 cm complete all as specified and directed.

Removing excavated material to a distance not exceeding 50 m & deposited where directed at a level not exceeding 1.50 m above the starting point.

Sand cushioning to UG cable laid in trenches with clean dry river sand complete all as specified.

Supply and laying common building bricks sub class 'B' designation 75 in trenches for laying of cable complete alll as specified and directed.

Lightning arresters expulsion type complete with all fittings, transmission class, disharge class, discharge capacity 65 kilo amp suitable for 11000 volts camplete all as specified and directed.

Air break switch gang operated, triple pole mechanically operated out door type with all fitting/accessories mounted on and including 11 KV HT porcelain insulator and steel channel frame GI operating rod 25 mm dia of suitable length with operating mechainsum worked from ground level vertically operated including locking arrangement for operating handle suitable for current rating of 200 Amps for operating handle suitable for current rating of 200 Amps HT 11 KV working pressure all as specified and directed.

Dismantling of unserviceable air break gang operated switches vertical/horizontal mounted including insulators and operating mechanism and Lightning arresters expulsion type from 2/4 pole structure complete all as specified and directed.

Earthing with GI earth plate electrode 600 X 600 X 6mm buried directly in ground (earth pit not less than 2.25M deep below ground level ) with top edge of the earth plate not less than 1.5M below ground level connected to GI strip 25 x 4mm thick for earthing lead fixed by means of nuts,bolt,washers etc.of copper / brass connected to earth test point complete all as specified in electrical plate NO 5 of SSR1996 part 1 ,including necessary excavation and earth work in any strata of soil,GI water pipe with 20mm dia.funnel &wire mesh PCC pit with CI cover and frame etc all as specified and directed by Engineer-in-charge. Note:- All the joints shall be made with welding to get proper conductivity.

Jiwan Singh

Kalsi Engineers and contractors

shivom builders

M/S NARAYAN CONSTRUCTION