Transient Recovery Voltages in Three-phase Asymmetrical Current Interruption

Abstract

Using the current injection method, how to calculate the transient recovery voltages in three-phase asymmetrical current interruption in analysis has been devised. This calculation is applicable to both effectively earthed neutral system and non-effectively earthed neutral system. Since the transient recovery voltages of three-phase test duty T100a are calculated, the performance of the circuit breaker in three-phase asymmetrical current interruption can be estimated more correctly in synthetic testing.