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Client : Date :

Location :

Type of Panel : Siemens WO/SAP no:

Type of MV PANELS & VCB : Rating: No. Of Operation : MV PANELS &VCB Sr No.VCB Sr No.

SR.NO. WORK DESCRIPTION PURPOSE METHOD OF CHECKINGA VACUUM CIRCUIT BREAKER

1 Visual Inspection of Breaker. If any damage Visually2 Thorough Cleaning of the Breaker removing the dust By clean cotton cloth3 Lubrication of all Moving Parts of Mechanism. lubrication With Special ISOPLAX TOPAZ Grease4 Oiling of Closing & Tripping Coil. lubrication With Special RITZOL Oil5 Checking of Gear Box Operation. for smoothness By manually spring charging method6 Checking of Test/Service Aux.Switch Operation. for proper contact By simulating test & service position7 Checking of Triping Mechanism Operation. for correctness by Breaker manual ON/OFF operation8 Breaker Aux. Switch Operatoin. for proper contact by Breaker manual ON/OFF operation9 Spring Charging Limit Switch Operation. for proper contact by Spring charging operation10 Checking of Front Drive Key Operation In Test Position. for smoothness & correctness By Double bit key11 Front Drive Key Operation In Service Position. for smoothness & correctness By Double bit key12 Checking of Triping Coil Resistance. healthiness With Resistance measurement meter13 Checking of Closing Coil Resistance. healthiness With Resistance measurement meter14 Vacuum Checking of Vacuum Interrupter healthiness of Vaccum interrupter as per method explained in O&M manual15 Contact Erosion Checking of vacuum Interrupter healthiness of Vaccum interrupter as per method explained in O&M manual16 Chceking of Stroke length mechnical settings correctness By Puller Guage17 Checking of Damper setting mechnical settings correctness By GO-NOGO & Filler Guage18 Removel of contact arm assembly and complete cleaning of contact surface to improve contact resistance Cleaning with emery paper/3M buffing19 Reconditioning and refurbishment of interconnection joints to improve contact resistance If required Silver plating on cotact surface20 fixing of contact arm assembly and setting as per distance chart for proper alighnment Fixing as per standrd assembly drg.21 Tightness Checking of Power Connection. avoid local heating Thru Torque Wrench22 Checking of all circlips & lock washers of VCB. for correct fixing Phisical checking23 Checking of Breaker ON/OFF Operation manually & electrically for correctness 5x manual & electrical operations24 Checking of pick-up voltage for Closing & tripping coil as per Siemens standard By Timing test kit25 Checking of Closing Time. as per Siemens standard By Timing test kit26 Checking of Triping Time. as per Siemens standard By Timing test kit27 Checking of pole descripency as per Siemens standard By Timing test kit28 Checking of bounce time as per Siemens standard By Timing test kit29 Checking of Contact Resistance. should be within limits By contact resistance meter30 Insulation Resistance Checking of VCB should be within limits By 5KV MeggarB BREAKER CHAMBER

1 Thorough Cleaning of Breaker Chamber. removing the dust By Vacuum Cleaner & Plain Cotton cloth2 Lubrication of Shutter Mechanism. lubrication for smooth operation With Special ISOPLAX TOPAZ Grease3 Checking of Shutter Movement. for smoothness By manually operating the shutter4 Checking of Front Drive Fixing Plates. for proper fixing Operation with Double bit key & Rack in/out handle5 Checking of Door Interlocks With Breaker. for correctness and smooth operationOperation with Double bit key & Rack in/out handle6 Checking of Breaker Interlocks With Panel Door. for correctness and smooth operationOperation with Double bit key & Rack in/out handle7 Checking of Front Drive Interlocks. for correctness and smooth operationOperation with Double bit key & Rack in/out handle

CHECK LIST FOR PERIODIC HEALTH CHECK-UP OF MV PANELS & VCB

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SR.NO. WORK DESCRIPTION PURPOSE METHOD OF CHECKING8 Cleaning of Top & Bottom bushings ( Shutdown is must) removing the dust By plain cotton cloth9 Cleaning of Top & Bottom fixed contacts and checking of smooth contact surfacefor healthiness By plain cotton cloth & Reconditioning if required10 Checking of thermostate wiring and its fixing for healthiness wiring continuty11 Checking the complete sealing of the breaker chamber for vermin proofing Phisical inspection and correction wherever reqd.12 Checking of Breaker Rack IN/OUT Inside the Panel. for proper alignment by Insertion & removal of breaker inside the panelC BUS BAR CHAMBER (SHUTDOWN IS MUST)

1 Thorough Cleaning of Bas Bar Chamber removing the dust By Vacuum Cleaner & Plain Cotton cloth2 Removal of busbar shrouds & checking of Bus Bar Joining Bolts Tightness tightning as per torque tightness chartBusbar tightness checking thru Torque wrench3 Tightness of Bus Bar Support Insulator. for proper fixing by Ring & Flat spanner4 Fixing of Busbar shrouds for insulation of joints By hand5 Checking the complete sealing of the busbar chamber for vermin proofing Phisical inspection and correction wherever reqd.6 Insulation Resistance Checking ( 5 KV Megger ) for insulation of joints By 5KV Magger7 Rear cover fixng for proper fixing Each bolt to be tightned with spannerD CT / CABLE CHAMBER (SHUTDOWN OF FEEDER IS MUST)

1 Thorough Cleaning of CT/ Cable chamber removing the dust By Vacuum Cleaner & Plain Cotton cloth2 Reconditioning and refurbishment of interconnection joints to improve contact resistance If required Silver plating on cotact surface3 Tightness checking of all the power connection joints including CT primary terminalfor proper connection by Ring & Flat spanner with proper care4 Checking of CT secondary wiring tightness for proper connection Thru Screw driver5 Checking the complete sealing of the CT chamber for vermin proofing Phisical inspection and correction wherever reqd.6 Rear cover fixng for proper fixing By 5KV Magger

LIST OF DOCUMENTS TO BE CARRIED1 PANEL & VCB Operating Manual2 Standard Test Chart for Timing & contact resistance3 Standard test chart for stroke length, damper settings, contact arm distance chart

LIST OF TOOLS TO BE CARRIED1 Timing test kit2 Contact resistance test kit3 Portable silver plating test kit4 Puller guage for stroke length checking5 GO-NOGO guage for damper settings6 filler guage 7 Standard tools includes flat, ring & box spaner set8 Portable grinder with birla 3M Pads

Consumables to be carried1 Special Grease & Oil2 Emery Paper ( Sze:)3 CRC Bottels4 Circlips & Lock washers5 Cleaning cloths

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