Abstract

This paper represents a multi-part switching test technique for testing Load Break Switches (LBS) using the basic synthetic test circuit (Weil circuit). In order to define the transient recovery voltage (TRV) due to LBS contact opening, a 4-parameter TRV envelope is proposed with an initial time delay parameter. A comparison between IEEE and IEC standard requirements has been made to compare the relative severity of TRV specified by the two standards. Simulation results revealed that it is possible to ensure both dielectric and thermal re-ignition withstand capability by using a two-part synthetic testing technique. Limitations with the method that result in excessive TRV are discussed.

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