SPECIAL REPAIR/REPLACEMENT OF DISTRIBUTION TRANSFORMERS AGAINST BER UNDER GE PANAGARH

Amount

Supply and install, testing and commissioning of step down outdoor type copper wound, Oil immersed transformer of capacity 400 KVA (Level-2) complete (Platform mounted) with standard, fitting HT 11KV, 3 Phase, LT 433 volts, 3 phase 4 wire (Dyn11) with off load changer with range +7.5 to -7.5% in steps of 2.5% on HT side to vary secondary voltage all as per IS 1180 ,complete all as specified and as directed by Engrs-in-Charge. (1) Technical Details : (a) No load Voltage Ratio (Normal Tap) - 11000/433 V (b) Number of phases : Three (c) Frequency : 50 Hz (d) Type of Cooling : ONAN (e) Winding connections : The primary winding (HV) shall be connected in delta and secondary winding ( LV) shall be connected in star. (f) Vector Group : Windings shall be connected as per Vector symbol : Dyn11 (g) Neutral Earthing : The neutral point of Secondary (LV) winding shall be brought out to a separate insulated terminal and shall be solidly earthed. (h) Off Load Tap Changer of the transformer : Voltage tapping range on H.V. side will be (+7.5%) to (-7.5%) insteps of 2.5%. The tap changing switch shall be located in a convenient position so that it can be operated from ground level. The switch handle shall be provided with a locking arrangement along with tap position, enabling the switch to be locked in position. The tap position marking should increase in clockwise direction and there should be a back stopper in between tap position 1(+7.5%) & 7(-7.5%). (j) The percentage impedance at 75 °C & 50 Hz refer to the (normal) principal Tapping shall be 4.5%. (k) Losses : Minimum losses as per manufacturer.

Item No 1 contd.... (2) Structural Details : The transformer shall be comprising of the following items :- (a) Externally hand operated off-circuit Tap Changer switch with position indicator and locking device. (b) Conservator with Oil gauge, filling Hole with plug and drain hole with plug. (c) undercarriage with four plain rollers. (d) Oil filling hole cum air release plug. (e) Drain Valve cum sampling valve. (f) Filter valve with Plug. (g) Lifting Lugs for Transformers. (h) Lifting lugs for Lid. (j) Earthing Terminals. (k) Thermometer Pocket (l) Silicagel Breather (m) Inspection Cover. (n) Explosion Vent. (o) 6 inches Dial type Thermometer with alarm, trip contacts and maximum temperature indicator with Metal Guard. (p) Rating Plate and Diagram Plate.

Supply and install, testing and commissioning of step down outdoor type copper wound, Oil immersed transformer of capacity 315 KVA (Level-2) complete (Platform mounted) with standard, fitting HT 11KV, 3 Phase, LT 433 volts, 3 phase 4 wire (Dyn11) with off load changer with range +7.5 to -7.5% in steps of 2.5% on HT side to vary secondary voltage all as per IS 1180 ,complete all as specified and as directed by Engrs-in-Charge. (1) Technical Details : (a) No load Voltage Ratio (Normal Tap) - 11000/433 V (b) Number of phases : Three (c) Frequency : 50 Hz (d) Type of Cooling : ONAN (e) Winding connections : The primary winding (HV) shall be connected in delta and secondary winding ( LV) shall be connected in star. (f) Vector Group : Windings shall be connected as per Vector symbol : Dyn11 (g) Neutral Earthing : The neutral point of Secondary (LV) winding shall be brought out to a separate insulated terminal and shall be solidly earthed. (h) Off Load Tap Changer of the transformer : Voltage tapping range on H.V. side will be (+7.5%) to (-7.5%) insteps of 2.5%. The tap changing switch shall be located in a convenient position so that it can be operated from ground level. The switch handle shall be provided with a locking arrangement along with tap position, enabling the switch to be locked in position. The tap position marking should increase in clockwise direction and there should be a back stopper in between tap position 1(+7.5%) & 7(-7.5%). (j) The percentage impedance at 75 °C & 50 Hz refer to the (normal) principal Tapping shall be 4.5%. (k) Losses : Minimum losses as per manufacturer.

Item No 2 contd.... (2) Structural Details : The transformer shall be comprising of the following items :- (a) Externally hand operated off-circuit Tap Changer switch with position indicator and locking device. (b) Conservator with Oil gauge, filling Hole with plug and drain hole with plug. (c) undercarriage with four plain rollers. (d) Oil filling hole cum air release plug. (e) Drain Valve cum sampling valve. (f) Filter valve with Plug. (g) Lifting Lugs for Transformers. (h) Lifting lugs for Lid. (j) Earthing Terminals. (k) Thermometer Pocket (l) Silicagel Breather (m) Inspection Cover. (n) Explosion Vent. (o) 6 inches Dial type Thermometer with alarm, trip contacts and maximum temperature indicator with Metal Guard. (p) Rating Plate and Diagram Plate.

Supply and install, testing and commissioning of step down outdoor type copper wound, Oil immersed transformer of capacity 200 KVA (Level-2) complete (Platform mounted) with standard, fitting HT 11KV, 3 Phase, LT 433 volts, 3 phase 4 wire (Dyn11) with off load changer with range +7.5 to -7.5% in steps of 2.5% on HT side to vary secondary voltage all as per IS 1180 ,complete all as specified and as directed by Engrs-in-Charge. (1) Technical Details : (a) No load Voltage Ratio (Normal Tap) - 11000/433 V (b) Number of phases : Three (c) Frequency : 50 Hz (d) Type of Cooling : ONAN (e) Winding connections : The primary winding (HV) shall be connected in delta and secondary winding ( LV) shall be connected in star. (f) Vector Group : Windings shall be connected as per Vector symbol : Dyn11 (g) Neutral Earthing : The neutral point of Secondary (LV) winding shall be brought out to a separate insulated terminal and shall be solidly earthed. (h) Off Load Tap Changer of the transformer : Voltage tapping range on H.V. side will be (+7.5%) to (-7.5%) insteps of 2.5%. The tap changing switch shall be located in a convenient position so that it can be operated from ground level. The switch handle shall be provided with a locking arrangement along with tap position, enabling the switch to be locked in position. The tap position marking should increase in clockwise direction and there should be a back stopper in between tap position 1(+7.5%) & 7(-7.5%). (j) The percentage impedance at 75 °C & 50 Hz refer to the (normal) principal Tapping shall be 4.5%. (k) Losses : Minimum losses as per manufacturer.

Item No 3 contd.... (2) Structural Details : The transformer shall be comprising of the following items :- (a) Externally hand operated off-circuit Tap Changer switch with position indicator and locking device. (b) Conservator with Oil gauge, filling Hole with plug and drain hole with plug. (c) undercarriage with four plain rollers. (d) Oil filling hole cum air release plug. (e) Drain Valve cum sampling valve. (f) Filter valve with Plug. (g) Lifting Lugs for Transformers. (h) Lifting lugs for Lid. (j) Earthing Terminals. (k) Thermometer Pocket (l) Silicagel Breather (m) Inspection Cover. (n) Explosion Vent. (o) 6 inches Dial type Thermometer with alarm, trip contacts and maximum temperature indicator with Metal Guard. (p) Rating Plate and Diagram Plate.

Supply and install, testing and commissioning of step down outdoor type copper wound, Oil immersed transformer of capacity 160 KVA (Level-2) complete (Platform mounted) with standard, fitting HT 11KV, 3 Phase, LT 433 volts, 3 phase 4 wire (Dyn11) with off load changer with range +7.5 to -7.5% in steps of 2.5% on HT side to vary secondary voltage all as per IS 1180 ,complete all as specified and as directed by Engrs-in-Charge. (1) Technical Details : (a) No load Voltage Ratio (Normal Tap) - 11000/433 V (b) Number of phases : Three (c) Frequency : 50 Hz (d) Type of Cooling : ONAN (e) Winding connections : The primary winding (HV) shall be connected in delta and secondary winding ( LV) shall be connected in star. (f) Vector Group : Windings shall be connected as per Vector symbol : Dyn11 (g) Neutral Earthing : The neutral point of Secondary (LV) winding shall be brought out to a separate insulated terminal and shall be solidly earthed. (h) Off Load Tap Changer of the transformer : Voltage tapping range on H.V. side will be (+7.5%) to (-7.5%) insteps of 2.5%. The tap changing switch shall be located in a convenient position so that it can be operated from ground level. The switch handle shall be provided with a locking arrangement along with tap position, enabling the switch to be locked in position. The tap position marking should increase in clockwise direction and there should be a back stopper in between tap position 1(+7.5%) & 7(-7.5%). (j) The percentage impedance at 75 °C & 50 Hz refer to the (normal) principal Tapping shall be 4.5%. (k) Losses : Minimum losses as per manufacturer.

Item No 4 contd.... (2) Structural Details : The transformer shall be comprising of the following items :- (a) Externally hand operated off-circuit Tap Changer switch with position indicator and locking device. (b) Conservator with Oil gauge, filling Hole with plug and drain hole with plug. (c) undercarriage with four plain rollers. (d) Oil filling hole cum air release plug. (e) Drain Valve cum sampling valve. (f) Filter valve with Plug. (g) Lifting Lugs for Transformers. (h) Lifting lugs for Lid. (j) Earthing Terminals. (k) Thermometer Pocket (l) Silicagel Breather (m) Inspection Cover. (n) Explosion Vent. (o) 6 inches Dial type Thermometer with alarm, trip contacts and maximum temperature indicator with Metal Guard. (p) Rating Plate and Diagram Plate.

Supply and install, testing and commissioning of step down outdoor type copper wound, Oil immersed transformer of capacity 100 KVA (Level-2) complete (Platform mounted) with standard, fitting HT 11KV, 3 Phase, LT 433 volts, 3 phase 4 wire (Dyn11) with off load changer with range +7.5 to -7.5% in steps of 2.5% on HT side to vary secondary voltage all as per IS 1180 ,complete all as specified and as directed by Engrs-in-Charge. (1) Technical Details : (a) No load Voltage Ratio (Normal Tap) - 11000/433 V (b) Number of phases : Three (c) Frequency : 50 Hz (d) Type of Cooling : ONAN (e) Winding connections : The primary winding (HV) shall be connected in delta and secondary winding ( LV) shall be connected in star. (f) Vector Group : Windings shall be connected as per Vector symbol : Dyn11 (g) Neutral Earthing : The neutral point of Secondary (LV) winding shall be brought out to a separate insulated terminal and shall be solidly earthed. (h) Off Load Tap Changer of the transformer : Voltage tapping range on H.V. side will be (+7.5%) to (-7.5%) insteps of 2.5%. The tap changing switch shall be located in a convenient position so that it can be operated from ground level. The switch handle shall be provided with a locking arrangement along with tap position, enabling the switch to be locked in position. The tap position marking should increase in clockwise direction and there should be a back stopper in between tap position 1(+7.5%) & 7(-7.5%). (j) The percentage impedance at 75 °C & 50 Hz refer to the (normal) principal Tapping shall be 4.5%. (k) Losses : Minimum losses as per manufacturer.

Item No 5 contd.... (2) Structural Details : The transformer shall be comprising of the following items :- (a) Externally hand operated off-circuit Tap Changer switch with position indicator and locking device. (b) Conservator with Oil gauge, filling Hole with plug and drain hole with plug. (c) undercarriage with four plain rollers. (d) Oil filling hole cum air release plug. (e) Drain Valve cum sampling valve. (f) Filter valve with Plug. (g) Lifting Lugs for Transformers. (h) Lifting lugs for Lid. (j) Earthing Terminals. (k) Thermometer Pocket (l) Silicagel Breather (m) Inspection Cover. (n) Explosion Vent. (o) 6 inches Dial type Thermometer with alarm, trip contacts and maximum temperature indicator with Metal Guard. (p) Rating Plate and Diagram Plate.

Notes for Serial Item No 1 to 5 : Departmental Testing and Commissioning arrangements to be done by Contractor.

BHARAT MULTITECH INDUSTRIES PVT LTD

Prasur Electricals & Engineering Co.

M/S JIWAN KUMAR MITTAL