With the gradual improvement of voltage levels in domestic substations, the usage of SF ₆ high-voltage circuit breakers in the power sector is currently growing at a rate of about 15% per year. In the fields of high voltage, ultra-high voltage, and extra high voltage switches, SF ₆ gas has almost become the only insulation and arc extinguishing medium. However, SF ₆ high-voltage switches are mostly installed indoors, and the air flow is relatively slow. Once SF ₆ gas leaks, it is easy to cause local oxygen deficiency, resulting in suffocation of workers due to oxygen...

With the gradual improvement of voltage levels in domestic substations, the usage of SF ₆ high-voltage circuit breakers in the power sector is currently growing at a rate of about 15% per year. In the fields of high voltage, ultra-high voltage, and extra high voltage switches, SF ₆ gas has almost become the only insulation and arc extinguishing medium. However, SF ₆ high-voltage switches are mostly installed indoors, and the air flow is relatively slow. Once SF ₆ gas leaks, it is easy to cause local oxygen deficiency, resulting in suffocation of workers due to oxygen...

SF6  switch is a widely used high-voltage electrical appliance in the power system, and the reliable operation of SF switch has become one of the most concerned issues for the power supply and consumption departments. SF6  gas density relay is an important component used to monitor the changes in SF6  gas density in theSF6   switch body during operation, and its performance directly affects the safety of SF6   switch operation. The SF6   gas density relay running on site often experiences inflexibility and poor contact of contacts after a period of time due to infrequent operation. Some density relays may also have...