SPECIAL REPAIR /REPLACEMENT OF BER TRANSFORMER AND ALLIED WORKS AT RAMGARH CANTT UNDER GE RAMGARH

Amount

Supply, installation, testing and commissioning outdoor type, pole mounted/plinth mounted stepdown transformer of capacity 100 KVA, 11 KV/415 volts (at full load) AC 3 phase 50 HZ, core type, double copper wound complete with first filling of IS : 335 ISI marked filtered & dehydrated transformer oi, Oil Natural Air Natural (ON AN) with external cooling tubes, delta connected on primary side (HV) and star connected on secondary side (LV) with neutral brought out on secondary side (LV side) and having 7 position off circuit tap changer (tapping range +7.5% in steps of 2.5% each) in accordance with vector group DYN-11 on HV side to be charged by means of hands operated off load tap changer gear. The maximum temperature rise should not exceed 45 degree celsius in oil and 55 degree celsius in HV/LV winding when measurement by resistance method after continous full load run on an ambient temp of 40 degree celsius. The transformer shall be EEL 2 of IS-1180-2014 with amd. no. 1,2,3 & 4 with the following components : a) Three nos porcelain bushing suitable for 11 KV on HV side, complete with copper rods nuts and washers. (b) One cable box on LT side (Secondary side) consisting of four nos porcelain bushing with copper rods, complete with nuts and washers with cable glands suitable for reception/ taking out cable on LT side suitable for 1100 Volts grade, PVC/ XLPE insulated and PVC sheathed heavy duty armourd cable including jointing material complete. (c) De-hydration breather with first fill of dehydrating agent (silica gel) (d) Explosive vent, Thermometer pocket on tank cover, oil level gauge, Oil drain filter valve, lifting lugs, oil filling hole with cap/ plug with connection plate complete, air release valve plug and four nos plain solid cast steel detachable rollers. (e) One No. 100 mm dia dial type thermometer, vapour pressure type, having range 0-120 degree celsius with metal guard having maximum perimeter temperature reading indicator with re-setting device. (f) Two earthing terminals on tank cover to facilitate fixing of 32 X 6 mm galvanised iron earth strip for earthing of body. (g) Rating plate and terminal marking plate. (h) Extra bushing for neutral in the LT cable box for providing independent set of earthing for neutral. (j) First fill of new and unused transformer oil, IS-335 filtered and testing upto 40 KV dielectric strength at 2.5 mm air gap between testing electrodes. (k) Providing adequate size and nos of channel embedded in floor for movement of transformer.

Supply, installation, testing and commissioning outdoor type, pole mounted/plinth mounted stepdown transformer of capacity 250 KVA, 11 KV/415 volts (at full load) AC 3 phase 50 HZ, core type, double copper wound complete with first filling of IS : 335 ISI marked filtered & dehydrated transformer oi, Oil Natural Air Natural (ON AN) with external cooling tubes, delta connected on primary side (HV) and star connected on secondary side (LV) with neutral brought out on secondary side (LV side) and having 7 position off circuit tap changer (tapping range +7.5% in steps of 2.5% each) in accordance with vector group DYN-11 on HV side to be charged by means of hands operated off load tap changer gear. The maximum temperature rise should not exceed 45 degree celsius in oil and 55 degree celsius in HV/LV winding when measurement by resistance method after continous full load run on an ambient temp of 40 degree celsius. The transformer shall be EEL 2 of IS-1180-2014 with amd. no. 1,2,3 & 4 with the following components :- (a) Three nos porcelain bushing suitable for 11 KV on HV side, complete with copper rods nuts and washers. (b) One cable box on LT side (Secondary side) consisting of four nos porcelain bushing with copper rods, complete with nuts and washers with cable glands suitable for reception/ taking out cable on LT side suitable for 1100 Volts grade, PVC/ XLPE insulated and PVC sheathed heavy duty armourd cable including jointing material complete. (c) De-hydration breather with first fill of dehydrating agent (silica gel) (d) Explosive vent, Thermometer pocket on tank cover, oil level gauge, Oil drain filter valve, lifting lugs, oil filling hole with cap/ plug with connection plate complete, air release valve plug and four nos plain solid cast steel detachable rollers. (e) One No. 100 mm dia dial type thermometer, vapour pressure type, having range 0-120 degree celsius with metal guard having maximum perimeter temperature reading indicator with re-setting device. (f) Two earthing terminals on tank cover to facilitate fixing of 32 X 6 mm galvanised iron earth strip for earthing of body. (g) Rating plate and terminal marking plate. (h) Extra bushing for neutral in the LT cable box for providing independent set of earthing for neutral. (j) First fill of new and unused transformer oil, IS-335 filtered and testing upto 40 KV dielectric strength at 2.5 mm air gap between testing electrodes. (k) Providing adequate size and nos of channel embedded in floor for movement of transformer.

Supply and laying of HT UG cable XLPE insulated armoured heavy duty electric cable with stranded aluminium conductor 11000 volts grade cross section area 95 Sqmm 3 core laid in trenches or fixing on panels/ walls/poles or passing through pipe including connecting with suitable lugs, glands, nuts and bolts testing and including taking down complete all as specified and directed.

Earthing complete with galvanised steel earth plate electrode of size 60cms x 60cms x 6.0 mm thick , buried directly in to the ground (earthpit not less than 2.25 m deep below the ground level) with top edge of the plate not less than 1.5 meters below normal ground level, connected to the galvanised earth lead by means of bolts , nuts check nuts and washers of galnanised iron or steel using GI strip 32 x 6 mm as earthing lead as shown in electric plate No-3 of SSR- Part-1 connected to earth strip all as specifed and necessary excavation and earth work in soft/loose soil, returning filling, disposal of surplus soil, earth pit in PCC 1 :3:6 type C-1 using 20 mm graded stone aggregate, pit, funnel, 15 mm diia meduim grade watering pipe, 40 mm dia GI light grade earth lead protection pipe,50 mm thick RCC 1:2:4 type B-1 cover slab of size 300x300x50mm as aearth pit cover Reinforced wth 8mm dia TMT bars@ c/c both ways and handle made out of 10mm dia bars funnel ,strainer, Charcoal including testing on completion complete all as specified and directed .

M/S Akash Enterprises

Roy and Sons Infrastructers

PIONEER TRADING

MONA GENERATOR SEVICES PVT. LTD.