| 1 | 500 KVA Transformer Maintenance | Out side claning, LT HT connection checking, leakage repairing, breather checking and silica gel replacement | 1 | Nos | Rabindra Nath Raul 700108,Indian Statistical Institute Kolkata 203 BT Road Kolkata -700108 | 10 |
| 2 | 750 KVA Transfermer Maintenance | Out side claning, LT HT connection checking, leakage repairing, breather checking and silica gel replacement | 2 | Nos | Rabindra Nath Raul 700108,Indian Statistical Institute Kolkata 203 BT Road Kolkata -700108 | 10 |
| 3 | 750 KVA DRY Transfermer Maintenance | Serving HT LT coil, cleaning by CRC 26 WD 40, Drying by hot blower and fine cotton fabricks, Checking all connection and earth neutral, Tap changer connetion checking | 1 | Nos | Rabindra Nath Raul 700108,Indian Statistical Institute Kolkata 203 BT Road Kolkata -700108 | 10 |
| 4 | | Supply of new transformer oil sealed pack only and filling in proper procedure in our existing transformer | 50 | Ltr | Rabindra Nath Raul 700108,Indian Statistical Institute Kolkata 203 BT Road Kolkata -700108 | 10 |
| 5 | | Filteration of old transformer oil by centrifugal electro static oil filter machine in proper temperature and pressure | 1,910 | Ltr | Rabindra Nath Raul 700108,Indian Statistical Institute Kolkata 203 BT Road Kolkata -700108 | 10 |
| 6 | | Testing of oil from government authorised lab | 3 | Nos | Rabindra Nath Raul 700108,Indian Statistical Institute Kolkata 203 BT Road Kolkata -700108 | 10 |
| 7 | | Earthing with copper earth plate 600 mm by 600 mm by 3 mm thick including accessories, and providing masonry enclosure with with cover plate having locking arrangement and watering pipe of 2.7 metre long etc. with charcoal or coke and salt as required. | 2 | Nos | Rabindra Nath Raul 700108,Indian Statistical Institute Kolkata 203 BT Road Kolkata -700108 | 10 |
| 8 | | Supplying and laying 25 mm by 5 mm copper strip at 0.50 metre below ground as strip earth electrode, including connection or terminating with nut, bolt, spring, washer etc. as required. (Jointing shall be done by overlapping with 2 sets of brass nut bolt & sprinci washer spaced at 50 mm) | 20 | Mtr | Rabindra Nath Raul 700108,Indian Statistical Institute Kolkata 203 BT Road Kolkata -700108 | 10 |
