The products are used as protection devices for power, lighting and control circuits of single-phase two-wire, three-phase three-wire, three-phase four-wire and three-phase five-wire below 50~60Hz, 500V, and are suitable for power distribution and control devices of modern buildings, such as industrial and civil buildings, industrial and mining enterprises, high-rise buildings, railway stations, hospitals, schools, organs and residences, and so on.
The working power and standby power in the dual power supply box are automatically switched, with electrical and mechanical double interlocking, and the action is sensitive and reliable.
It is suitable for starting and controlling air-conditioning fans and fire exhaust (sending) fans in industrial and mining enterprises, scientific research equipment and civil buildings, with automatic, remote and manual selection and overload alarm function, and can be linked with fire control.
Fan control box