Servicing And Preventive Maintenance Of Various Electrical And Mechanical Equipments Installed At Lis Marval Stages 1St- 1 Complete Checking, Servicing And Preventive Maintenance Of 400 H.P Auto Transformer Starters ( Unit Nos. 1 To 6 ) After Disconne, Srinagar-Jammu And Kashmir
TDR : 30929414
Tender Notice
Corrigendum Details
BOQ
Expired
Srinagar
Jammu And Kashmir
Corrigendum : Servicing And Preventive Maintenance Of Various Electrical And Mechanical Equipments Installed At Lis Marval Stages 1St- 1 Complete Checking, Servicing And Preventive Maintenance Of 400 H.P Auto Transformer Starters ( Unit Nos. 1 To 6 ) After Disconne
Name of Work: Servicing and preventive maintenance of various electrical and mechanical equipments installed at LIS Marval Stages 1st.
Sl. No.
Item Description
1
Complete checking, servicing and preventive maintenance of 400 H.P auto transformer starters (unit nos. 1 to 6) after disconnecting of all incoming and outgoing connections. The job comprised of dismantling of point sets of star and deltacontactors of the starter, removing of accumulated carbon from the contact surfaces by applying carbon tetra chloride, making the surface smooth and carbon free and adjustment of point gaps to prevent flashing/ arcing as per requirement. Checking and adjustment of protection devices, timing relay and single phase preventer. The job included lubricating/ tightening of contactor bus-bar/ cabling connection joints, complete checking and servicing of control wiring and and replacement of damaged/burnt 400amp. Alunimum terminals (03) numbers of reputed make reconnecting of all incoming and out going leads. Removing of dirt, dust, etc with the help of high power electric air blower. Reassembling of various components, reconnecting cables of the starter and finally full load testing at site.
2
Complete checking, servicing and preventive maintenance of Main control panel which included 2000A - 03 nos. incomers and 1000/800 A 06 nos. outgoing motor feeders by way of isolating and unmounting of ACBs from main circuit, removing of carbon deposits from contact points by applying carbon tetra chloride. The job included setting/ adjustments to ACBs to prevent flashing, lubrication and tightening of bus bar joints, removing of dirt, dust and other substances with the help of high power electric air blower. Refitting of ACBs and insulation/ tapping as per requirement on outgoing feeder terminals. The panel with individual feeders was tested on full load.
3
Providing and fitting of 19/083 copper conductor (14.6Meters)of reputed make for connecting of auto transformer coil assembly both star and delta circuit (five feet and three feet long) respectivelly 06numbers each forUnit No.6th.The cable shall be provided with both ended terminals of95mm copper terminals dully crimped by hyduralic crimping tool.Also the job comprises ofreplacement oftimer relay 10amp.and timer coil one number each.Providing and fitting of 75mm sq.digital single phase voltmeter two numbers for 10KVA automatic voltage stabilizer of control supply for 425 HP Pannels.
4
Rewinding of burnt-out transformer coil assembly of 400HP Auto-transformer starter of unit No.1st at Marval LIS Stage 1st .The job comprises of dismantling of Auto-transformer coil assembly from the container after disconnecting of all incoming and out-going terminals/leads. Taking out transformer oil from the container.Complete rewinding of burnt-out/damaged coil assembly. Tapping of leads by Teflon coated cotton tape and then impregnation of coil by standard quality varnish. Refilling of transformer oil after proper filtration, refitting back of rewinded coil assembly, reconnecting of all incoming and out-going circuits.The job includes topping of auto transformer starter with fresh T-Oil of required grade and specification as per IS (Approx. (25) liters). The job includes carriage, shifting loading ,unloading from site of work to workshop and back to its re-installation at site and the job includes testing of the starter on full load at site.
5
Fabrication providing and fitting of Heavy duty 175mm long Hinge for 900mm dia flap valve of unit No,03,04,05 and 06.The job involves removing of damagedhinges from the flap valve.Providing and fitting ofSS hinge ,adjustment of flap valve upon delivery pipe to ensure hassle free operation of flat valves.All tools and plants required for the job shall be responsibility of execuating agency
6
Replacement of burnt/damaged ML-12 Contactor assembly of unit No.4th.The job comprises ofremoving of burnt out ML-12 Contactor assembly from the 425 HP automatic transformerstarter.Providing and fitting of new ML-12 contactor assembly or its equivellent ofreputed make
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