Restrike characteristics of vacuum circuit breaker in its opening process under DC voltage

The restrike of vacuum circuit breaker during the breaking process causes overvoltage and intensifies insulation deterioration high-voltage equipment. To solve this problem, aging test method characteristics are researched. A withstand voltage platform 40.5-kV was established to obtain effects contact spacing loop inrush currents on number restrike, wavefront steepness breakdown voltage, duration. decreased duration repeated-breakdown arc increased with breaker. As current system increased, breaker, increased. amplitude closing results provide a theoretical basis data support for preventive optimization test.