Synthetic equivalent test circuit of circuit breaker

Details Synthetic equivalent test circuit of circuit breaker Synthetic equivalent test circuit of circuit breaker

G - Physics

01

R

324/21

G01R 31/333 (2006.01)

Patent

CA 2025757

ABSTRACT OF THE DISCLOSURE The invention relates to a synthetic equivalent test circuit that can generate a 4-parameter TRV, for verifying a large current breaking performance of a power circuit breaker. An inherent current source current is supplied to the testing circuit breaker to be tested and an auxiliary circuit breaker. A small current, relative to the current source current is supplied to the first and second auxiliary switches from a power source. In a state in which the small current from the current source or the resonance circuit flows, the first auxiliary switch is opened almost simultaneously with the auxiliary circuit breaker, the testing circuit breaker, and the like and operates so as to break the current at the time point of the final zero point of the current source current. Therefore, the connection of the voltage source circuit just before the final zero point of the current source current, that is, the current supply of the voltage source current and the breaking of a capacitor circuit current by the first auxiliary switch to generate a 4-parameter TRV after that can be also easily accomplished. Since a large current is not supplied to the first auxiliary switch, its electrodes and the like are consumed at a reduced rate. Thus, the extremely stable operation can be continued for a long time without any inspection and maintenance.

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