Design of a the multi-function experiments platform for the researches of circuit breakers

With the requirements of circuit breaker's insulation and arc-interruption characteristics tests, a modular multi-function experimental platform is designed. The designed experimental platform takes the insulation and arc-interruption characteristics of the dielectrics in vacuum chamber and gas chamber as the experimental subjects; taking impulse generator, DC voltage source, current source, and frequency pulse source as the peripheral circuit. Each parts of peripheral circuit are connected with master control desk by sub-control module. The master control desk detects the temperature, humidity, the moving contacts operation moments and movements in the chamber at real-time with the sensors. And then, the tested parameters will be revision timely with the controlled relays and IGBTs. Based on the platform, the dynamic dielectric strength recovery characteristics in hybrid circuit breaker, the characteristics of switches with different working voltage and structures, the dielectric strength recovery characteristics of CO₂ gas with different gas pressures and temperatures are tested. The test results prove that the platform is stable and efficient in the experiments, and the temperature error is within 1 °C, the operating precisions of actuators is controlled within ± 500us.