Considerations of Transient Recovery Voltages in Connection with the Modern Circuit Breaker Testing

Technology is always facing to the increasing requirements from industry in the field of testing power circuit breakers. In order to cope with the growing capability of breakers required and to meet the accumulation of more precise knowledge of modern age, continuing review on the basic process of testing is always of essential importance. In the paper some fundamental problems concerning transient recovery voltage are discussed in connection with the short circuit testing of modern power circuit breakers. The validity and usefulness of combined application of unit test and synthetic test are demonstrated based on some recent studies in the laboratory authors are associated with.