Post-arc Current Measurement in Mechanical Circuit Breakers for Hvdc Applications
Keywords:post-arc current, mechanical circuit breaker, small current measurement system
AbstractPost-arc currents contain valuable information on the breaker’s performance. In this paper, the dimensioning procedure for a measurement system for such currents, based on a diode clamped shunt resistor is presented. Based on synthetic low and high power tests, the performance of a mock-up is evaluated. Finally, the post-arc current of a model gas circuit breaker, designed for use in DC applications, is measured.
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