Public Works Department-PWD has published Tender For Maintenance Of Water Supply System Repair Servicing Overhauling Of Jyoti Make Vacuum Circuit Breakers And Vacuum Contactors Of Gogal Pumping Station Margao. Submission Date for this Tender is 31-03-2023. Water Supply Project Tenders in margao Goa. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Repairs, Servicing , Overhauling of indoor3.3KV, 630AJyoti make , Type: VK10J25 Vacuum Circuit Breaker andoutdoor 33KV 1250Amps Type : VY30M25D ,Vacuum circuit breakerbyJyoti servicetechnicians / experiencedtechnician . The scope of work isdetailed below : a) Visualinspectionand Cleaning ofBreaker ,b)Lubrication of moving partsof mechanism, c)Checkingthe operation of closing andtripping coil , d) Checking of testservice aux.switch operation, e) Checking of tripping mechanism operation. , f) Checking of Breaker Aux. switch operation , g)Checking ofspringcharginglimitswitch operation , h) checking of damper setting,i) Measurement of stoke gapsfor VIcontacts in VCBand adjustment if required. |
| 2 | j) Tightness checkingof power connection of VCB and electrical wiring in breakers.k) Checkingand tightening of nuts/Bolts and other fasteners in VCB , l)Checking of all circlipsand lockwashers ofVCB, m) CheckingofBreaker ON/Off operation manually and electrically,n) Measurement of contact resistance , HV test , closing & tripping timingo) Cleaning of U-barrier ,p) Cleaning of Jaw Contacts , q) Checking alignment of breaker with the male contacts ofpanel., r) Checking anti-pumping operation in VCB ,s)Replacingofdefective partsifany Complete, as directed by Engineer in charge. |
| 3 | Servicingandoverhauling of 3.3KV, 400A Jyotimake Type: JVE-604 Vacuum Contactor byJyoti servicetechnicians /experiencedtechnician. The Scope of work isas detailed below :a) Cleaning and checking of all parts and replacement of wear out components. b) Greasing at required place c) Replacement of any defective parts if found ( spare shall be arraged by PWD) , d) Checking and tightening of electrical wiring in VC , e) Checking of ON/OFF operation in VC f) Measurement of opening and closing time of VC , g) Checking the healthiness of VC JAW thorough cleaning of VC , h) Checking of healthiness of closing & tripping coils in VC, i) Checking of Vacuum interrupter of VCby Hi-Pot ( HV AC testing kit), j) Checking & record of contact resistances of VC , k) Checking the shutter operation of the VC panels , l) Checking the operation of the test & Service limit Switch., m) IR measurement test of VC , n) Measurement of timing test of VC , o) Rack -in & Rack out of VC in Switchgear panel , p) Replacingofdefective partsifany ,Complete as directed by Engineer-in-charge. |
| 4 | Repairs , Servicing& Overhauling of 3.3KV, 400A loadbreakSwitch makeA-Bond-Strands Pvt. Ltd by experiencedtechnicianas detailed below : a) Cleaningand checkingof all parts. b)Greasingby usingMolykotegreaseatrequiredplaces and checkingofspring operating mechanism for itsperfect working condition.c) Checking of ON/OFFoperationof breaker.d) Rectifying andadjustingfree movement ofbreaker andtesting . |
| 5 | Supply and Replacement ofSpares for 33KV, 1250ATypeVY30M25D outdoor Vacuum citcuit breaker& 3.3KV, 630A Jyoti make , Type: VK10J25 , C -9386 , Vacuum Circuit Breaker . |
| 6 | i) Closing Coil assembly , 30V DC,make Jyoti. |
| 7 | ii) Tripping Coil assembly, 30V DC, make Jyoti. |
| 8 | iii) Bridge rectifier ,240V AC/ 220V DC .( with RC filter) make MIC/Sheetal or equivalent |
| 9 | iv) Auxiliary relay, RE300, 220V DC with LED and base for spring charging motor,make: jyoti or equivalent. |
| 10 | v) Auxiliary relayRE-300 , 30V DC with LED and base for Anti pumping, make: jyoti or equivalent |
| 11 | vi) Spur gear assembly ( 4VC49-0018) of approved make. |
| 12 | vii) Pinion gear assembly ( 4VC49-0091) of approved make. |
| 13 | viii) TNC Switch 25Amps , make Jyoti or equivalent in ABB |
| 14 | ix) Closing Spring of approved make |
| 15 | x) Opening Spring of approved make |
| 16 | Supply and Replacement ofspares for 3.3KV, 400A Jyotimak Type: JVE-604 Vacuum Contactor. |
| 17 | i) Contactor 110V DC , 4NO + 4 NC make Siemens /JSL or equivalent. |
| 18 | ii) Auxiliary relay RE300, 110V DC with LED and base,make Jyoti. |
| 19 | iii) Auxiliary relay RE300 , 110V AC with LED and base,make Jyoti. |
| 20 | iv) Limit Switch for Service position ( 75S )/ test position (75 T) 2 pole, make Jyoti or equivalent. |
| 21 | v) Closing coil for Vacuum contactor 110V DC , (CC1 & CC2) , make Jyoti. |
| 22 | vi) 3.3KVHRC Fuse , 250A, make GE / Power (GEC)/ S&S. |
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