Profile: Hanguang Electron Device Factory manufactures a range of vacuum interrupters. Our product line includes vacuum circuit breaker, operating device and vacuum interrupter test sets. Our vacuum interrupter features is used for circuit breakers, switches, reclosers, rail circuit breakers and contactors. Our AC vacuum interrupter dielectric testing is designed for testing vacuum interrupters. Our contact resistance testing is designed to check and measure ultra low electrical resistance in power circuit breaker, contacts and bus bar joints. We are accredited with ISO 9001 certification.