OVERHAULING AND PREVENTIVE MAINTENANCE OF HT VCBs AT OLD DOCK AREA SUBSTATIONS AT NAVAL DOCKYARD VISAKHAPATNAM UNDER GE (I) (DM) VISAKHAPATNAM

Amount

Taking down HT Switchgear Vaccum Circuit breaker of capacity 630 Amps to 2500 Amps, 12KV / 11KV, Schneider make HWX model for carrying out following Repairs, Overhauling, Servicing, Preventive Maintenance and refixing the same after carrying out rapairs / overhauling complete all as specified and as directed : (a) Tripping off the breaker, rackout out the breaker complete from the panel along with the trolley for servicing/ inspection/ overhauling. (b) Servicing/ Inspecting /checking Automatic Safety Shutter operation for serviceability and replacement of spares if required. (c) Servicing/ Inspecting / checking of busbar spout and circuit spout connections for RYB Phases and replacement of spares if required. (d) Checking of breaker main mechanism Assembly, fixed contacts and current carrying parts of the breaker, trolley, insulated assembly etc. (e) Setting, reassembling, cleaning, adjustment of fixed contacts, main contact, acring contacts and moving contact for proper setting of auxiliary contacts operating mechanism.

(f) Servicing/ Inspecting / checking of Secondary Socketd / Busbar Earthing Plugs/ Earthing Sockets and replacement of spares if required. (g) Checking, setting and adjustment of rackin and rackout operation of the Breaker Trolley (h) Decarbonising of Busbar and connected items. (j) Lubrication and greasing of all moving parts of the trolley, stopper bolt for proper operating. (K) Overhauling on VCBs includes following:- (Before & After) (i) IR test (5KV) (ii) Timing test. (Opening and Closing) (iii) CRM test (CB close) Note: (a) The rate quoted shall be deemed to be include for necessary T&P, nuts, bolts , washers, gasket, insulation tape,HT sleeve, monoplast compound to put in to the VCBs and Panles in serviceable condition, testing and commissioning. [b] Replacement of defective parts of the VCB shall be measured and paid separately

Supply and fix including dismantling taking out unserviceable 11KV Buffer (For Opening Spring ) For 800A to 1600A, 11 KV VCB complete all as specified and as directed. Make:- Schneider, Part No- MVIJ00098-01 or equivalent.

Supply and fix including dismantling taking out unserviceable Buffer (For Closing Spring ) For 800A to 1600A, 11 KV VCB complete all as specified and as directed. Make:-Schneider only, Part No- MVIJ00056-01 or equivalent.

Supply and fix including dismantling taking out unserviceable single (Read-Blue) phase busbar spout suitable for 800 Amps to 1250 Amps VCB complete all as specified and as directed. Make :- Schneider Part No MEP-39-32185 or equivalent.

Supply and fix including dismantling taking out unserviceable single (Y) phase busbar spout for 800 Amps to 1250 Amps VCB complete all as specified and as directed. Make :-Schneider Part No MEP-39-32186 or equivalent.

Supply and fix including dismantling taking out unserviceable CT Spout suitable for VCB 800 to 2500 Amps complete all as specified and as directed. Make :- Schneider Part No MEP-39-32187 or equivalent.

Supply & fixing closing coil assembly 110 V DC to Schneider make 11KV VCB incl necessary connection testing complete incl dismantling taking down unsv one complete all as specified and as directed.. Make:- Schneider, Part No- ECO39SN134900FN

Supply and fixing tripping coil 110 V DC to Schneider make 11KV VCB incl necessary connection testing complete incl dismantling taking down unsv one complete all as specified and as directed.. Make:- Schneider, Part No- ECO39SN134100FN or equivalent.

Supply and fix including dismantling taking out unserviceable Breaker Wheel - CAST IRON, For 800A to 2500A,11 KV VCB complete all as specified and as directed.. Make:-Schneider, Part No-MVIA00025-01 or equivalent.

Supply and fix including dismantling taking out unserviceable spring charging Universal motor with gear box 220V AC For 800A to 2500A 11 KV VCB complete all as specified and as directed. Make:-Schneider, Part No-MVIJOO157-02 or equivalent.

Supply and fix including dismantling taking out unserviceable busbar supporting insulator For 800A to 1600A 11 KV VCB complete all as specified and as directed. Make:-Schneider only , Part No- MEP-39-A0147901 or equivalent.

Supply and fix including dismantling taking out unserviceable Rectifier unit (Monoblock) for spring charging motor For 800A to 1600A, 11 KV VCB complete all as specified and as directed. Make:-Schneider, Part No- ERC-A-A00DC-001or equivalent.

Supply and fix including dismantling taking out unserviceable Drive Beam suitable for 11 KV VCB 800 to 2000 Amps complete all as specified and as directed. Make:-Schneider Model No MSM3950118600FN or equivalent.

Supply and fix including dismantling taking out unserviceable Epoxy Body suitable for 11 KV VCB up to 1250 Amps complete all as specified and as directed. Make:-Schneider Model No MEP3953022000FN-22 or equivalent.

Supply and fix including dismantling taking out unserviceable Shutter assembly for busbar / circuit spout suitable for 11 KV VCB up to 800A -1250 Amps complete all as specified and as directed. Make Schneider only Model No SPP0009-04 or equivalent

Supply and fix including dismantling taking out unserviceable space heater, 230V, 100 watt inside cable chamber including necessary connection, testing complete all as specified and as directed. Make- Schneider, Part No-EHT-A-AA 000-001or equivalent

Supply and fix including dismantling taking out unserviceable thermostat for space heater For 800A to 1600A Schneider make 11 KV VCB complete all as specified and as directed. Make:-Schneider , Part No- ETH-E-B000-001 or equivalent

Supply and fix including dismantling taking out unserviceable resin cast CT dual core of ratio 100-50/5A-5A/15VA core 1 metering, core 2 protection of breaking capacity 31.5KA with dimension 220x110x230 mm and hole to hole 110 mm for 800 to 1250 A Schneider make 11 KV VCB complete all as specified and as directed. Make : Kappa/Esun/ Pragati/AE/Schneider Note : Contractor should visit the site for brackets size to mounting the CTs in 11 KV VCBs.

All as per item No 18.00 above but 400-200/5A-5A/15VA 5P10

All as per item No 18.00 above but 600-300/5A-5A/15VA 5P10

Supply and fix including dismantling taking out unserviceable resin cast PT dual core of ratio 11KV/root3/110V/root3/100VA core 1 metering, core 2 protection complete all as specified and as directed.. Make : Kappa/Esun/ Pragati/AE/Schneider Note : Contractor should visit the site for brackets size to mounting the PTs in 11 KV VCBs.

Supply and fix including dismantling taking out unserviceable PT Spout suitable for VCB Panel 800 to 2500 Amps , along with connected busbars/cables complete all as specified and as directed.

M&L for THERMOGRAPHIC TESTING of 11kV switch Boards with IMAGE INFRARED CAMERA to detect Hot spots, to avoid electrical failures and increase safety for all current-carrying devices. Visual and Mechanical Inspection to be done when load is applied to the system. Use & follow appropriate caution, safety devices, and personal protective equipment. Provide a report which includes the following: 1. Description of equipment tested. 2. Discrepancies if any.(HOT Spots). 3. Identify load conditions at time of inspection. 4. Provide photographs and/or thermo grams.

M&L for painting of outer surface of multiple section of complete VCB panel 11 KV size upto 2m x 1.8 x 0.8 in one substation using one coat of synthetic zinc paint after preparation of surface, providing protection cover to all metering equipment, panel meters, switchgears, cleaning of all meters and switch gears all as specified and directed.

Decarburizing/Buffering of copper Busbar complete from 11KV HT Bus bar chamber of each VCB panel including connecting Busbar from CT to main Busbar & spout. Servicing of support insulator by clean cloth and hot air blower/ vacuum cleaner, applying Backtol Red solution to the bus bar insulator , checking for any loose contact, refixing of all nuts & bolts by Stainless steel , refixing all covers ,replacement of defective parts, busbar sleeve and ensure proper decarburizing up to proper megger value , checking all the connections all as specified and directed.

Supply and applying Si-COAT 570 RTV Silicone High Voltage Insulator Coating solution using an Sprayer to the 11KV Indoor VCB panel Cable chamber (4.5 Kg coating materials per panel) , testing complete all as specified and directed. Make:- CSL Silicones Inc. Canada

Supply and applying Si-COAT 570 RTV Silicone High Voltage Insulator Coating solution using an Sprayer to the 11KV Indoor VCB panel Bus bar chamber (4 Kg coating materials per panel) , testing complete all as specified and directed. Make:- CSL Silicones Inc. Canada Note for item Nos. 26.00 & 27.00 1.Surface preparation: All insulation surfaces of the equipment to be coated shall be made free from dust, grease, oil and any other foreign material without damaging the surface. The surface of the equipment shall be made dry before application of the RTV coating. 2.All the required materials, tools & tackles, testing equipment, consumables etc. for application of HVIC coating shall be in bidders’ scope

Attending 24 hrs day to day complaints and call on repair of HT Switchgear Vaccum Circuit breaker of capacity 630 Amps to 2500 Amps one electrician and one helper for all days including Holidays & Sundays for the following item of work:- (a) To check rackout out the breaker complete from the panel along with the trolley. (b) To check relay and HT cable joint. (c) To check space heater and thrmostate.

MVV Prasad

B5BUILDING SOLUTIONS

Mavee Syndicate

P NARAYANA RAO

MSN ENGINEERING WORKS