SPECIAL REPAIR/REPLACEMENT OF TRANSFORMER AGAINST DECLARED BER AND CONNECTED WORKS AT AF STN PALAM UNDER GE (AF) PALAM, DELHI CANTT-10

Amount

Excavation in trenches in soft/loose soil not exceeding 1.50 Mtrs wide and not exc. 1.5 Mtrs deep and getting out for taking out/laying cable, poles &stay etc. complete all as specified and directed by Engr-in-Charge.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exc. 25 cm thick after the cable have been laid, tested complete all as specified and directed by Engineer-in-Charge

Removal of excavated surplus soil to a distance not exc. 50 Mtrs and depositing where directed at a level not exc 1.5 Mtr above the starting point complete all as specified and directed by Engr-in-charge

M&L for sand cushioning to underground cable provided with layer of sand (8cm deep before laying the cable and 15 cm deep after laying the cable i.e. total 23 cm) complete all as specified and directed by Engr-in-charge.

Supplying and laying un-reinforced precast concrete cable cover of class HVP, type 1 with peak, flat size 300 mm x 180 mm x 40 mm, complete all as specified and directed.

Taking down existing Transformer of any capacity in position and transporting to MES store yard or as directed by Engr-in-Charge.

Taking down existing RMU/OCBs any type in position and transporting to MES store yard or as directed by Engr-in-Charge.

Supply, Installation, testing and commissioning of Transformer Outdoor type step down transformer, 11KV/433 Volts (at no load) AC 3 phase 50 Hz, 400 KVA capacity, core type copper wound, on HV & LV coil immerse, naturally cooled, Oil natural-air natural (ONAN) with external cooling tubes, delta connected on primary side (HV) and star connected on secondary side (LV side) in accordance with vector group DYN-11 with neutral brought out on secondary side (LV side ) and having 7 step tappings at +/- 2.5 % of each step (+5% to 10% ) on HV side to be changed by means of hand 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 measured by resistance method after continuous full load run on and ambient temp of 40 degree celsius the transformer shall be in accordance with latest IS -1180 (Part-I) (Level 2) (against BER) (Location : O Mess S/S and CPRU AF S/S ) and comprise of the following:- Note: Transformer must be BIS Marked and BEE 2 star label

Ser item no. 8.00 contd... (a) Three porcelain bushing suitable for 11 KV on HV side, and including and termination box complete with copper rods, nuts and washers. (b) One cable end termination box on LT side ( secondary side) consisting of four no.s porcelain bushing with copper rods, complete with nuts and washers. (c) Oil conservator with filter type drain valve and oil level gauge (d) De-hydrating breather with first fill of dehydrating agent (silica gel) . (e) Explosive vent, thermometer pocket on tank cover, oil level gauge, oil drain filter valve, lifting lugs/hooks, oil filling hole with cap/plug with connection plate complete, air release valve plug and four nos plain solid cast steel detachable rollers. (f) 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-testing device.

Ser item no. 8.00 contd... (g) Two earthing terminals on tank cover to facilitate fixing of 50x6mm galvanized iron earth strip for earthing of body. (h) Rating plate and terminal marking plate. (j) Extra bushing for neutral, in the LT cable box for providing independent set of earthing for neutral. (k) First filling of new transformer oil, IS-335 marked and tested up to 60 KV dielectric strength at 2.5 mm air gap between testing electrodes. Note: (i) Transformer shall be placed on PCC platform of size 2.5x2.5x 1.0 Mtr. (ii) Cost for Excavation, earth work, PCC and brick work etc shall be included in the quoted rate by the contractor.

Supply, Installation, testing and commissioning of Transformer Outdoor type step down transformer, 11KV/433 Volts (at no load) AC 3 phase 50 Hz, 315 KVA capacity, core type copper wound, on HV & LV coil immerse, naturally cooled, Oil natural-air natural (ONAN) with external cooling tubes, delta connected on primary side (HV) and star connected on secondary side (LV side) in accordance with vector group DYN-11 with neutral brought out on secondary side (LV side ) and having 7 step tappings at +/- 2.5 % of each step (+5% to 10% ) on HV side to be changed by means of hand 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 measured by resistance method after continuous full load run on and ambient temp of 40 degree celsius the transformer shall be in accordance with latest IS -1180 (Part-I) (Level 2) (Against BER)(location : New Tech area S/S) and comprise of the following:- Note: Transformer must be BIS Marked and BEE 2 star label

Ser item no. 9.00 contd... (a) Three porcelain bushing suitable for 11 KV on HV side, and including and termination box complete with copper rods, nuts and washers. (b) One cable end termination box on LT side ( secondary side) consisting of four nos porcelain bushing with copper rods, complete with nuts and washers. (c) Oil conservator with filter type drain valve and oil level gauge. (d) De-hydrating breather with first fill of dehydrating agent (silica gel) . (e) Explosive vent, thermometer pocket on tank cover, oil level gauge, oil drain filter valve, lifting lugs/hooks, oil filling hole with cap/plug with connection plate complete, air release valve plug and four nos plain solid cast steel detachable rollers. (f) 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-testing device.

Ser item no. 9.00 contd... (g) Two earthing terminals on tank cover to facilitate fixing of 50x6mm galvanized iron earth strip for earthing of body. (h) Rating plate and terminal marking plate. (j) Extra bushing for neutral, in the LT cable box for providing independent set of earthing for neutral. (k) First filling of new transformer oil, IS-335 marked and tested up to 60 KV dielectric strength at 2.5 mm air gap between testing electrodes. Note: (i) Transformer shall be placed on PCC platform of size 2.5x2.5x 1.0 Mtr. (ii) Cost for Excavation, earth work, PCC and brick work etc shall be included in the quoted rate by the contractor.

Supply, Installation, testing and commissioning of Transformer Out door type step down transformer, 11KV/433 Volts (at no load) AC 3 phase 50 Hz, 200 KVA capacity, core type copper wound, on HV & LV coil immerse, naturally cooled, Oil natural-air natural (ONAN) with external cooling tubes, delta connected on primary side (HV) and star connected on secondary side (LV side) in accordance with vector group DYN-11 with neutral brought out on secondary side (LV side ) and having 7 step tappings at +/- 2.5 % of each step (+5% to 10% ) on HV side to be changed by means of hand 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 measured by resistance method after continuous full load run on and ambient temp of 40 degree celsius the transformer shall be in accordance with latest IS -1180 (Part-I) (Level 2) (Against BER)(location : CPRU S/S) and comprise of the following:- Note: Transformer must be BIS Marked and BEE 2 star label

Ser item no. 10.00 contd... (a) Three porcelain bushing suitable for 11 KV on HV side, and including and termination box complete with copper rods, nuts and washers. (b) One cable end termination box on LT side ( secondary side) consisting of four nos porcelain bushing with copper rods, complete with nuts and washers. (c) Oil conservator with filter type drain valve and oil level gauge. (d) De-hydrating breather with first fill of dehydrating agent (silica gel) . (e) Explosive vent, thermometer pocket on tank cover, oil level gauge, oil drain filter valve, lifting lugs/hooks, oil filling hole with cap/plug with connection plate complete, air release valve plug and four nos plain solid cast steel detachable rollers. (f) 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-testing device.

Ser item no. 10.00 contd... (g) Two earthing terminals on tank cover to facilitate fixing of 50x6mm galvanized iron earth strip for earthing of body. (h) Rating plate and terminal marking plate. (j) Extra bushing for neutral, in the LT cable box for providing independent set of earthing for neutral. (k) First filling of new transformer oil, IS-335 marked and tested up to 60 KV dielectric strength at 2.5 mm air gap between testing electrodes. Note: (i) Transformer shall be placed on PCC platform of size 2.5x2.5x 1.0 Mtr. (ii) Cost for Excavation, earth work, PCC and brick work etc shall be included in the quoted rate by the contractor.

Supply, Installation, testing and commissioning of Transformer Outdoor type step down transformer, 11KV/433 Volts (at no load) AC 3 phase 50 Hz, 160 KVA capacity, core type copper wound, on HV & LV coil immerse, naturally cooled, Oil natural-air natural (ONAN) with external cooling tubes, delta connected on primary side (HV) and star connected on secondary side (LV side) in accordance with vector group DYN-11 with neutral brought out on secondary side (LV side ) and having 7 step tappings at +/- 2.5 % of each step (+5% to 10% ) on HV side to be changed by means of hand 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 measured by resistance method after continuous full load run on and ambient temp of 40 degree celsius the transformer shall be in accordance with latest IS -1180 (Part-I) (Level 2) (Against BER)(location : DSI S/S, O Mess RV Pump House S/S and RV Pump House S/S) and comprise of the following:- Note: Transformer must be BIS Marked and BEE 2 star label

Ser item no. 11.00 contd... (a) Three porcelain bushing suitable for 11 KV on HV side, and including and termination box complete with copper rods, nuts and washers. (b) One cable end termination box on LT side ( secondary side) consisting of four nos porcelain bushing with copper rods, complete with nuts and washers. (c) Oil conservator with filter type drain valve and oil level gauge. (d) De-hydrating breather with first fill of dehydrating agent (silica gel) . (e) Explosive vent, thermometer pocket on tank cover, oil level gauge, oil drain filter valve, lifting lugs/hooks, oil filling hole with cap/plug with connection plate complete, air release valve plug and four nos plain solid cast steel detachable rollers. (f) 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-testing device.

Ser item no. 11.00 contd... (g) Two earthing terminals on tank cover to facilitate fixing of 50x6mm galvanized iron earth strip for earthing of body. (h) Rating plate and terminal marking plate. (j) Extra bushing for neutral, in the LT cable box for providing independent set of earthing for neutral. (k) First filling of new transformer oil, IS-335 marked and tested up to 60 KV dielectric strength at 2.5 mm air gap between testing electrodes. Note: (i) Transformer shall be placed on PCC platform of size 2.5x2.5x 1.0 Mtr. (ii) Cost for Excavation, earth work, PCC and brick work etc shall be included in the quoted rate by the contractor.

Supply, installation, testing and commissioning Ring Main unit outdoor type suitable for one incoming and 02 outgoing 11 KV, 3 phase, 50 Hz 3 wire SF6 gas insulated confirming to IEC 6733/IEC 60694 outdoor type earthed neutral, extensible breaking capacity 350MVA ,IP 54 degree protection, outdoor, free standing metal clad SF6 Ring Main Unit compressing of :- (a) 01 Nos 630A load break SF6 ring switches incoming tee off spring assisted rotating arc type. (b) 02 Nos Outgoing SF6 circuit breaker unit with self-actuating electronic over current relay live cable indicator, emergency trip, push button and internal fault passage indicator with remote indication contacts, external flashers and current reading facility with LCD display. Note : - (i) The Ring Main Unit must be with three position device (ON/OFF/EARTH) (b) The cable doors must be interlocked with earth switch to ensure the cable compartment can be accessed only when switch is in earthed position.

Supply, laying testing and commissioning in replacement trenches/passing through pipes/on poles etc. cable XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor, 11000 volts, grade of size of cable 120 Sqmm 3 core suitable for earthed system including taking out unserviceable cable complete all as specified and directed by Engineer-in-Charge.

Supply, laying testing and commissioning in replacement trenches/passing through pipes/on poles etc. cable XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor, 11000 volts, grade of size of cable 95 Sqmm 3 core suitable for earthed system including taking out unserviceable cable complete all as specified and directed by Engineer-in-Charge.

Supply & jointing in replacement heat shrinkable straight through joint kit suitable for HT 11 KV XLPE cable of size 120 Sqmm 3 core complete all as specified and as directed by Engineer-in-Charge.

Supply & jointing in replacement heat shrinkable straight through joint kit suitable for HT 11 KV XLPE cable of size 95 Sqmm 3 core complete all as specified and as directed by Engineer-in-Charge.

Supply & jointing in replacement heat shrinkable end termination outdoor joint with jointing material suitable for HT 11 KV XLPE cable of size 120 to 185 Sqmm 3 core complete all as specified and as directed by Engineer-in-Charge.

Supply & jointing in replacement heat shrinkable end termination outdoor joint with jointing material suitable for HT 11 KV XLPE cable of size 50 to 95 Sqmm 3 core complete all as specified and as directed by Engineer-in-Charge.

Supply & jointing in replacement heat shrinkable end termination indoor joint with jointing material suitable for HT 11 KV XLPE cable of size 120 to 185 Sqmm 3 core complete all as specified and as directed by Engineer-in-Charge.

Supply & jointing in replacement heat shrinkable end termination indoor joint with jointing material suitable for HT 11 KV XLPE cable of size 50 to 95 Sqmm 3 core complete all as specified and as directed by Engineer-in-Charge.

M&L for earthing in replacement with galvanized mild steel earth plate electrode 60cm x 60cm x 6mm thick buried directly in ground (earth pit not less than 2.25 Mtr below ground level) with top edge of earth plate not less than 1.5 Mtrs below ground level connected to GI strip 25x6mm as earth lead by means of nuts, bolts, thimbles, check nuts, washers of GI or steel, including PCC (concrete chamber) shall be PCC 1:3:6 type C-1 using 20mm graded stone aggregate, with fair finish internal surface of concrete chamber shall be given 15mm thick plaster in CM 1:4, funnel with wire gauge mesh, 80 mm thick RCC pit cover 320 mm x 320 mm of RCC 1:2:4 type B-1 using 20 mm graded stone aggregate reinforced with XPM, JALLI and charcoal dust and common salt all as shown in electrical plate No 3 of MES SSR Part-I (2009) and specified including provision of GI strip protected by 40 mm dia medium grade pipe and watering pipe shall be 20mm bore medium grade, and including all excavation and earth work & connecting the earthing to an earthing test point complete all as specified & directed by Engr-in-Charge.

RAVINDRA BROTHERS

MV Engineers And Contractors

M/s JAIMAA ASSOCIATES

M P TYAGI ENGINEERS AND CONTRACTORS

M/s VINOD KUMAR SHARMA