PURPOSE: To obtain a method of measuring a transient recovery voltage which enables the measuring of a proper waveform of the transient recovery voltage without being affected by an arc voltage and the interruption of current.
CONSTITUTION: A sample switch gear 5 is connected to a short-circuit dynamotor 1 through a closer 4. In the circuitry, transient recovery voltage adjusting circuits 6a-6c and 7a-7c are connected between the closer 4 and the sample switch gear 5 and respective phases and the ground separately while not being connected to a short-circuited point confined to a contact 5a of one phase (A phase) corresponding to a first phase breaking phase of the sample switch gear 5 to measure the proper waveform of a transient recovery voltage.
ONOMOTO SHIYUUJI
CHIYOU TERUMICHI
