| 1 | 1 | Repairing of 60KV/1600mA TR-Set: Common job of T-R Set\n1. Complete draining out of oil & dismantling and lifting of core & coil assemblies\n2. Dismantling of Rectifier banks from Transformer.\n3. Primary testing for detection of fault.\n4. Joint Inspection by WBPDCL representative and the party at works will be made to witness the faults & further action towards rectification to be discussed & settled for due rectification of faults.\n5. Cleaning of core, coil & tank and associated clamps etc.\n6. Reassemble the core & coils, reconnection of coils and cleaning of residual sludge from core, tank etc.\n7. The tank to be cleaned thoroughly and painted with insulation paint.\n8. Heat varnishing of coils, checking, testing and due rectification including spares, if required. Fitting & fixing of rectifier assembly (checking of individual rectifier if required to be done)\n9. Changing of all gaskets by new one with chetak, cortica, dog brand RC- 70C neoprene rubberized cork-sheet gaskets.\n10. Tanking of core & coil assembly.\n11. Oil filling- Transformer oil of proper grade to be supplied by WBPDCL i.e. BDV of oil tested at 2.5mm gap should be able to withstand 40KV for 01 min.\n12. Painting of outer surface tank with best quality of paint (like ICI/ Berger make smoke grey paints)\n13. Supply of nuts, bolts and other spare items.\n14. Final testing in presence of WBPDCL representative. Relevant Test Certificate has to be submitted by the party.\n | item1 | 4 | Number |
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| 2 | 2 | Rewinding of LT/HT Coil\nRewinding of LT/ HT coils, if found defective after testing, the same will be replaced/ repaired by the party.\nNB:-\nThe price should be Scrap Copper adjusted price.\n | item2 | 4 | Number |
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| 3 | 3 | Installation of new bridge rectifier\nBridge rectifier, if found defective after testing, the same will have to be replaced by the party.\nNB:\n1. The Bridge Rectifier must have RC Filter against each Power Diodes.\n2. The Bridge Rectifier must be Imported.\n | item3 | 4 | Number |
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| 4 | 4 | Installation of new high Freq. Choke\nHigh frequency choke, Linear Reactor, if found absent or defective after testing, the same will have to be replaced by the party.\nNB: The Resistance value should be 8 ohm to 12 ohm\n | item4 | 4 | Number |
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| 5 | 5 | Installation of HVR\nHigh Voltage Resistance (HVR), if found defective after testing, the same will have to be replaced by the party.\nNB:\n1. The Resistance value should be 250 Mega ohm.\n2. The HVR must be Imported.\n | item5 | 4 | Number |
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| 6 | 6 | Repairing of 72KV/1400Ma TR-Set:Common job of T-R Set\n1. Complete draining out of oil & dismantling and lifting of core & coil assemblies\n2. Dismantling of Rectifier banks from Transformer.\n3. Primary testing for detection of fault.\n4. Joint Inspection by WBPDCL representative and the party at works will be made to witness the faults & further action towards rectification to be discussed & settled for due rectification of faults.\n5. Cleaning of core, coil & tank and associated clamps etc.\n6. Reassemble the core & coils, reconnection of coils and cleaning of residual sludge from core, tank etc.\n7. The tank to be cleaned thoroughly and painted with insulation paint.\n8. Heat varnishing of coils, checking, testing and due rectification including spares, if required. Fitting & fixing of rectifier assembly (checking of individual rectifier if required to be done)\n9. Changing of all gaskets by new one with chetak, cortica, dog brand RC- 70C neoprene rubberized cork-sheet gaskets.\n10. Tanking of core & coil assembly.\n11. Oil filling- Transformer oil of proper grade to be supplied by WBPDCL i.e. BDV of oil tested at 2.5mm gap should be able to withstand 40KV for 01 min.\n12. Painting of outer surface tank with best quality of paint (like ICI/ Berger make smoke grey paints)\n13. Supply of nuts, bolts and other spare items.\n14. Final testing in presence of WBPDCL representative. Relevant Test Certificate has to be submitted by the party.\n | item6 | 2 | Number |
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| 7 | 7 | Rewinding of LT/HT Coil\nRewinding of LT/ HT coils, if found defective after testing, the same will be replaced/ repaired by the party.\nNB:-\nThe price should be Scrap Copper adjusted price.\n | item7 | 2 | Number |
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| 8 | 8 | Installation of new bridge rectifier\nBridge rectifier, if found defective after testing, the same will have to be replaced by the party.\nNB:\n1. The Bridge Rectifier must have RC Filter against each Power Diodes.\n2. The Bridge Rectifier must be Imported.\n | item8 | 2 | Number |
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| 9 | 9 | Installation of new high Freq. Choke\nHigh frequency choke, Linear Reactor, if found absent or defective after testing, the same will have to be replaced by the party.\nNB: The Resistance value should be 8 ohm to 12 ohm\n | item9 | 2 | Number |
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| 10 | 10 | Installation of HVR\nHigh Voltage Resistance (HVR), if found defective after testing, the same will have to be replaced by the party.\nNB:\n1. The Resistance value should be 250 Mega ohm.\n2. The HVR must be Imported.\n | item10 | 2 | Number |
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