Circuit Breakers Servicing,Testing & Commissioning

Product Description

Circuit Breakers Servicing,Testing & Commissioning

Offline Testing

•  Insulation Resistance Measurement
•  Dynamic Contact Resistance Measurement (DCRM)
•  State Contact Resistance Measurement (CRM)
• Timing Measurement
•  SF6 Gas Dew Point Measurement
•   SF6 Gas Leakage Test
•   Vacuum Interrupter Test ( VIDAR-only for VCB)
•   Functional Check (Remote Trial)

Online Testing 

Partial Discharge Measurement (For all Switchyard Equipment)

Thermography ( For All MV/EHV Equipments) 

Circuit Breakers Servicing : 

• Cleaning of breaker with CRC
• Removal of old grease and re-greasing the same with recommended grease.
• Check condition of arcing contact and gap between fixed and moving arcing contacts shall be checked.
• Checking the reset mechanism, tripping of breaker through push button
• Checking tripping of ACB through protection release
• Tripping of ACB manually through volt metric release.
• Checking and adjust freeness of DN and volt metric release trip rod
• Checking presence and proper tightening of hardware.
• Checking presence of all circlips
• Checking condition and alignment of jaw contact with cradle terminals
• Checking condition of ACB wiring and replace if required
• Checking and adjusting gap between hylam sheet and side plate
• Checking proper closing of all poles together
• Checking working of anti pumping device in case of EDO ACB
• Checking alignment of SIC and its operation
• Checking scrapping earth alignment
• Checking condition of arc chutes
• Checking U/V release pick up and drop off
• Checking ACB tripping through shunt release
• Checking motor operation in case of EDO ACB
• Checking closing coil operation in case of EDO ACB
• Checking continuity and proper changeover of aux contact block
• Checking of release by secondary injection for O/L, S/C, E/F
• Setting of release as per the load
• Checking the healthiness of CTs
• The spare parts, accessories would have to be provided by the customer.