Requirements for SF6 densitometer in the operation regulations of the State Grid, DL/T596-1996 Preventive Test Procedures for Electric Power Equipment implemented by the Ministry of Electric Power on January 1, 1997: "SF6 gas densitometer (including setting value) inspection" item is included in the No. 13 of the "switchgear" section, and the test time required in the regulations is 1-3 years, after major repair or when necessary, the specific calibration time is formulated by the pilot plants in each province, Generally, it is appropriate to check at least once every three years, which is applicable to high-voltage circuit breakers and combined circuit breaker GIS of ABB, Siemens, Schneider, Areva and other brands.

Overhaul, maintenance and transformation of disconnector: overhaul of conductive circuit, overhaul of transmission part, overhaul of grounding switch, overhaul of operating mechanism, overhaul characteristic adjustment

Requirements for SF6 densitometer in the operation regulations of the State Grid, DL/T596-1996 Preventive Test Procedures for Electric Power Equipment implemented by the Ministry of Electric Power on January 1, 1997: "SF6 gas densitometer (including setting value) inspection" item is included in the No. 13 of the "switchgear" section, and the test time required in the regulations is 1-3 years, after major repair or when necessary, the specific calibration time is formulated by the pilot plants in each province, Generally, it is appropriate to check at least once every three years, which is applicable to high-voltage circuit breakers and combined circuit breaker GIS of ABB, Siemens, Schneider, Areva and other brands.

Repair and insulation transformation of PIS&KYN12kV-40.5kV switchgear. The main content of the maintenance of the switch cabinet: insulation transformation of the switch cabinet. Five prevention locking of switch cabinet and repair and transformation of circuit breaker. Inspection, test and operation diagnosis of switchgear. High voltage circuit breaker vacuum degree or SF6 gas tightness detection, diagnosis or gas circuit transformation. Infrared imaging detection of SF6 gas leakage of circuit breaker pole. Maintenance of circuit breaker operating mechanism. Switch characteristic test and travel curve analysis. Circuit resistance detection and analysis. Vacuum degree detection of circuit breaker pole. Detection, analysis and treatment of SF6 gas micro water composition.