COMPLETION OF INCOMPLETION WORK OF REPAIR/MAINTENANCE OF DC 110V SUPPLY FOR RELAYS OF VCBs AND CALIBRATION OF RELAYS AT VARIOUS MARINE SUBSTATIONS AT NAVAL DOCKYARD VISAKHAPATNAM UNDER GE (I) (DM) VISAKHAPATNAM

Amount

M&L for collecting necessary required data & peak load details from IED’s of any type/ make of 11 KV HT panel alongwith Transformer full load details during peak hours, Relay setting calculations & Co-ordination study to be done for unit protection setting of individual transformers and all incoming/outgoing feeders and Firm Recommendations has to be furnished in report for complete down stream power distribution system (Complete 11 KV system) and overall co-ordinations of time need to be achieved by adjustment in setting to plug and time multiplier of IED’s and complete co-ordinations of time need to be submitted in Graphs to Engineer-in- Charge.

M&L for on site programming, testing and calibration of 11 KV HT panel intlegant electronic device, for testing of all BI, BO, trip functions/ tripping logics of the IED after final current settings by simulating fault current in the secondary side by using automatic 3-ph secondary injection test set, for proper tripping of CB during actual system fault conduction through master trip relay to VCB tripping coil and recording test results and submitted to Engineer in -charge to keep on record duly signed by all concerned complete all as specified and as directed.

Materials & Labours for 11 KV HT panel, on line calibration of multifunctional meter at site, for testing/ confirming proper measurement readings of KW, KVAR, KVA, PF, HZ, & Energy KWH, KVARH & KVAH after configuring proper system parameters like CT ratio & PT ratio and Calibration should be carried out by using standard master instrument which is higher class of accuracy that the meter under test and Recording Test Results and submitted to Engineer-in-charge to keep on record duly singed by all concerned complete all as specified and as directed by Engineer-in-Charge.

Materials & Labours for 11 KV HT panel, calibration of voltmeter at site, after configuring proper system parameters like PT ratio. Calibration should be carried out by using standard master instrument which is higher class of accuracy than the meter under test and recording test results and submitted to Engineer in-charge to keep on record duly signed by all concerned complete all as specified and as directed by Engineer-in-Charge.

Materials & Labours for 11 KV HT panel, calibration of current transformer by using primary injection test set at site from panel backside after taking shutdown/ during panel shutdown. CT primary current valve must be calibrate in all measuring & Protection devices for proper readings and recordings test results and submitted to Engineer in-Charge to keep on record duly singed by all concerned complete all as specified and as directed by Engineer-in-Charge.

Materials & Labours for 11 KV HT panel, Calibration of Ammeter at site, by using secondary injection test set after configuring proper system parameters like CT ratio. Standard master instrument should be higher class of accuracy than the meter under test and Recording test results and submitted to Engineer in-charge to keep on record duly singed by all concerned complete all as specified and as directed by Engineer-in-Charge.

Supply and fixing of multifunctional meter with LED display, accuracy class-1, including dismantling taking down unserviceable one an connection, programming, testing complete all as specified and directed by Engineer-in-Charge. Make: Elemesure, L&T, Schneider

Materials & Labours for rectification of control circuit faults and retrofit of control circuit of 11 KV VCB by replacement of defective components & wiring with FRLSH multi- stranded PVC insulated copper conductor 1100 volts grade as per existing size of wire complete all as specified and directed by Engineer-in-Charge. Note: Required new components will be measured and paid separately under relevant items

Supply and fixing the following for CONTROL SWITCHES including dismantling taking down unserviceable one and connection, programming, testing complete all as specified and directed by Engineer-in-Charge.

T-N-C Switch (Breaker Control Switch) Make: Schneider, L&T & Kaycee

VAX 31 Trip Circuit and Trip Coil Supervision Relay Make: Schneider, L&T, ABB & Siemens

110 V DC, Aux Relays type VAA-33 Make: Schneider, L&T, ABB & Siemens

2 Pole/ Single pole, 2A/6A, DC MCB from control Circuit Make: L&T, Schneider, ABB, Siemens & Legrand

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