automatic change-over switch

The functions of automation, electric control and hand control. Delay-time 0.5s,detection signal,to prevent error action. Remote control "0" position. The key switch to select control modes. The switch can all be provided with RS-485 communication interface .This can be provided according to the requriements of theuser. Suitable in the two cricuit of main and prepare electrical power,self-switch and self-reset. External connection carries on the function expansion. Suitable in the two circuit of main and perpare electrical power.