Annual Maintenance Work Including Periodic And Preventive Maintenance Of Equipments And Testing Of Grid Equipments As Per Standard Operating Procedure At 220 / 132 Kv Grid Sub Station Ramchandrapur ( Adp-2 ) For F.Y. 2023-24 From 16.05.2023 To 31.03.2024--1 Checking & Observation (1. clamp, connectors & jumpers/2.Air & Gas Pressure/3.Batterries & Battery system/4. control & Relay Panels 5. Transformers Oil & winding Temp, Fans, Oil Level, silica gel etc. 6. Oil Leakage & Equipment noise). Highly skilled-1 person, Skilled-1 person & Unskilled-2 persons. 2 Preventive/Routine Maintenance of Grid Substation as per schedule provided by Engineer Incharge a 220 KV Bay/132 KV Bay-Nut bolt tightening, Adjustment of Contacts (male/female) Cleaning, greasing, mobilization, & jelly putting in Clamp & connectors ,Earthing Flat, Jumpers and other equipments related with Insulators, Isolators, CT,PT, CB, LA, dropping, and panel of a Bay b 132 KV Half Main Bus-Nut bolt tightening, Adjustment, Cleaning, greasing, mobilization, & jelly putting in Clamp & connectors, Earthing Flat, Jumpers and other equipments related with Insulators, Isolators, PT. c 132 KV Transfer Bus-Nut bolt tightening, Adjustment, Cleaning, greasing, mobilization, & jelly putting in Clamp & connectors, Earthing Flat, Jumpers and other equipments related with Insulators, Isolators, PT. d 220 KV Half Main Bus-I&II ,Nut bolt tightening, Adjustment, Cleaning, greasing, mobilization, & jelly putting in Clamp & connectors, Earthing Flat, Jumpers and other equipments related with Insulators, Isolators, PT. e 220 KV Transfer Bus-Nut bolt tightening, Adjustment, Cleaning, greasing, mobilization, & jelly putting in Clamp & connectors, Earthing Flat, Jumpers and other equipments related with Insulators, Isolators, PT. f Transformer-Nut bolt tightening,Cleaning, in Clamp & connectors, Earthing Flat, Jumpers, silica gel filling, and other equipments related with transformer body. g SST-Nut bolt tightening,Adjustment, Cleaning, Clamp & connectors ,Earthing Flat, Jumpers and other equipments related with SST body. h Transformer- IR value measurement, i Transformer- BDV measurement, j Circuit Breaker- IR value measurement, k CT[of a bay]- IR value measurement, (quarterly basis) l CT Ratio test quarterly, knee point, secondary resistance & tanδ & capacitance yearly basis. m LA [of a bay]- IR value measurement (yearly basis) n PT /CVT[Set]- IR value measurement (yearly basis) o PT/CVT tanδ & capacitance yearly basis (yearly basis) p Measurement & Testing of Transmision Line- Using Fault Locator or any other Device q Measurement & Testing of CB and relay- Using CT Injection Kit or any other Device ( timing test and tanδ & capacitance yearly basis and CRM half yearly basis). r Measurement & Testing of Any Grid Equipment- Using Any Kit available in JUSNL or Grid s Thermography vision report of all grid equiopments. 3 Maintenance/Emergency Maintenance of Grid Substation as per schedule and JOB provided by Engineer Incharge a Replacement of Nut-Bolts b Replacement of Jumper (conductor/ strip) c Replacement of Clamp & connectors/PG/jumper conia d Replacement of Female contact e Replacement of Female contact base f Replacement of Isolator Blade g Replacement of Isolator Blade base h Replacement of Female contact at High level i Replacement of Isolator Blade at High level j Replacement of Insulators k Replacement of 220 KV or 132KV CT/PT Junction Box including cable terminationn& connection l Replacement of 132KV CB pole m Replacement of 220 KV CB pole n Minor Repairing of Trasformer- Meggering with opening of bushing connectors , checking of PRV, vent pipe & Buchholz relay, oil top-up etc….. including all or any. o Minor Repairing of CT- Meggering,Opening top cover, replacement of Gasket & CT Stud , oil topup etc..including all or any p Minor Repairing of PT- Meggering,Opening top cover, replacement of Gasket & PT Stud , oil top up etc..including all or any q Minor Repairing of CB-Meggering,Gas filling, checking of MCB, contactors, motor, spring and tripping or closing coils, SF6 gas filling etc… including all or any. r Minor Repairing of Isolator-Adjustment of contacts & moving part etc… s Minor Repairing of Panel- looping & wiring of cabels, loose contact rectification, replacement of lugs,ferrules etc… t Filling of SF6 Gas u Fixing and replacement of Earthing copper bond/Flat v Fixing and replacement of Energy Meter/ MW Meter/ Voltmeter/ Ammeter/ Relay 4 MISC Work of Grid Substation as per schedule and JOB provided by Engineer Incharge a Battery system cleaning b Cleaning of panels( including all 132KV panel, 220 KV panel ,ACDB, DCDB,etc) c Rectification of Lighting and auxiliary power supply in Grid premises & Colony d Material/ equipment manual shifting & movement in Grid Premises e Measurement of earth footing resistance of all earth pits. f Laying of Control Cable 5 Break down Maintenance a Mobilization/Demobilization of Labour Gang b Supply of Emergency Gang with T&P for work like Conductor snapping of main bus 6 Supply of Hydra / Crane(upto 8MT Capacity ) as per requirement 7 Complete Overhauling with painting of 150 MVA Transformer Cooling Fans with supply of all materials if required 8 Transportation of materilas & equipments through Truck/Pickup upto 3MT including loading,unloading of the materials (i)Upto First 50kM (ii)50kM<Distance<100kM 9 Repair and Overhauling of 3ph Sub-mersible pump including materials, lifting & lay down of Sub-mersible pump from Borewell , repair of water supply pipe all complete job & Transporation cost. 10 Repair of 220 KV SF6 Breaker Air Compressor motor if required 11 Repair of 220 KV SF6 Breaker 3Φ Phase motor if required 12 Repair of 220 KV SF6 Breaker 1Φ spring charged motor if required 13 Repair of 132 KV VCB 1Φ spring charged motor if required 14 Testing transformer oil by recognized laboratory including supply of sampling bottle a BDV b DGA c Water content PPM d FURAN Analysis e Interfacial Tension IFT f Total Acidity g Contingency (To&Fro Charges including fooding & lodging) 15 Testing of 220/132 KV 150 MVA Power Transformers of GSS a TAN Delta test of 220 KV(HV) & 132KV(LV) bushing b Winding Resistance test c Turn Ratio test d Magnetic Balance test e Short Circuit impedance test f IR test including PI 16 Erection of following equipments with Crane/derrick at site including handling the material/equipments carefully at site including labour charges for all incidental and operational items of work ( Excluding Cost of Transportation Charges from Store to Site.) a 220 KV Current Transformer, Potential Transformer & CVT including Cable Terminal. b 220 KV Lighting Arrestors c 132 KV Current Transformer, Potential Transformer & CVT including Cable Terminal. d 132 KV Lighting Arrestors 17 Dismantling of following equipments with Crane/derrick at site including handling the material/equipments carefully at site including labour charges for all incidental and operational items of work ( Excluding Cost of Transportation Charges from Store to Site.) a 220 KV Current Transformer, Potential Transformer & CVT including Cable Terminal. b 220 KV Lighting Arrestors c 132 KV Current Transformer, Potential Transformer & CVT including Cable Terminal. d 132 KV Lighting Arrestors 18 Supply of Consumables viz. Markin cloth, Distilled water, Grease, Mobil, Nuts & Bolts, Cotton waste, Joute, Paterollium Jelly, Kerosine, mobil, WD-40 rust remover etc. required time to time for O&M works of GSS. 19 Air Condition Service Charge (Indoor and outdoor) Gas Filling Charge Annual Maintenance with all spares 20 Filtration of transformer oil (if m/c supplied by JUSNL).
