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. 1.Self switch and self reset When the main When the main power supply circuit loopbreaks down(lack phase ,over voltage)the switch(to be possible set 0 999S)after tranformation time delay T1 automatically changeover into the spare power supply circuit loop. When the main electrical power supply loop recover normal,switch return time delay T2(may set 0 999S)automatically back to the main power loop. 2.Self switch no self reset Suitable in the two circuit city electricity mutually backup system. When 1 route power circuit failure (lack phase ,over voltage);The switch(may set 0 999S)after transformation time delay T1 automatically changeover into 2 Road power circuit ;When the 1 route power circuit restores and become normal,the switch does not return 1 Road,only then inr route 2 power failure , the switch returns time delay T2 (may set 0 999S)to automatically returns 1 Road power circuit. 3.City electrical generator Is suitable supplies power primarily in the city electricity ,the power set for the spare power supply system.When the city electricity breaks down,the switch controller first sends out the start kerosene engine signal,the switch(i.e. Warm machine time adjustable 0 999S)transfer automatically after transformation time delay T1 into the kerosene engine power supply return route.When the city electricity restores is normal,the switch after returns by time delay T2(may set 0 999S)automatically changeover returns to the city electricity power supply,after then cold machine time delay T3(may set 0 999S)again,the controller sends out the shutting down kerosene enine signal.The city electricity ,the kersene engine have three-phase lack,three-phase low and over voltage examination function etc.