TEST DEVICE FOR CIRCUIT-BREAKER

PROBLEM TO BE SOLVED: To provide a test device capable of judging the presence or absence of rebreaking after reflash-over and the presence or absence of non-continued electric discharge while suppressing arc current at the time of the reflash-over. SOLUTION: In a single phase direct test circuit, a capacitor 21 is initially charged by a direct current charging device 22 to supply vibration current equal to a short current to a sample circuit-breaker 6 from the capacitor and a reactor 23 due to trigger of a gap 25, and an auxiliary circuit-breaker 5 is opened by breaking operation of the sample circuit-breaker to apply a restoration voltage of a minute current through resistance 17 from the capacitor 15 and detect that reflash-over and non-continued electric discharge occur in the sample circuit-breaker during the application of voltage due to extinction of current by a minute current detector 27. A starter 29 triggers the gap 25 at the time of detection to supply vibration current and judge the occurrence of rebreaking and non-continued electric discharge.