E DIN EN IEC 62146-2 VDE 0560-51:2024-07

This part of the IEC 62146 series is applicable to TRV capacitors used on high-voltage alternating current circuit-breakers with rated voltages above 100 kV with 50 Hz or 60 Hz.
TRV capacitors are installed phase to earth, either in parallel to the bushing on dead tank circuit-breakers, or immersed inside the circuit-breaker, or freestanding close to the circuit-breaker. Their function is to limit the transient recovery voltage (TRV) and the rate of rise of recovery voltage (RRRV) on the circuit-breaker. Capacitors in compliance with this standard can be used as TRV capacitor.
This standard applies to TRV capacitors falling into one or both of the following categories for:
– mounting on or close to air insulated switchgear (AIS) dead tank and live tank circuit-breakers, or
– mounting on gas insulated switchgear (GIS) circuit-breakers.
The testing for each of the above applications is in some cases different.
This standard does not apply to grading capacitors installed in parallel to the chambers of the circuit-breaker, which are specified in IEC 62146-1.
This standard does not apply to capacitors not directly associated with high-voltage alternating current circuit-breakers.
The object of this standard is:
– to define uniform rules regarding performances, testing and rating;
– to define specific safety rules;
– to provide a guidance for installation and operation.