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A transient recovery voltage for high-voltage circuit breakers is the voltage that appears across the terminals after current interruption. It is a critical parameter for fault interruption by a high-voltage circuit breaker, its characteristics can lead either to a successful current interruption or to a failure.
The TRV is dependent on the characteristics of the system connected on both terminals of the circuit-breaker, and on the type of fault that this circuit breaker has to interrupt.
Characteristics of the system include:
The most severe TRV is applied on the first pole of a circuit-breaker that interrupts current. The parameters of TRVs are defined in international standards such as IEC and IEEE.
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