To understand the working principle of double power automatic switch before we look first to understand the structure of double power automatic switch part, dual power automatic switch is more common in the market are generally by the switch body and a controller: the two combined switch body, and there is a whole circuit breaker is divided into double power supply automatic switch key factor to judge the quality of the function of the controller is mainly used for working condition detection of power supply, when the detected power failure or accident, the controller will send a command, the switch body from a power conversion to another power fast.

The working principle of double power automatic switch is used for power supply when the power failure or failure, unable to recover in a period of time under the condition of power supply, electric resection of each circuit breaker opened double throw switch to the prevention of back power supply side, keep the dual power switch box owned electricity for the circuit breaker is in off state. When the power supply unit is in operation, the circuit breakers of the generator and the circuit breakers in the power supply control cabinet shall be closed in sequence. One by one, the standby power supply circuit breaker is closed.                 

Double power automatic switch in design with a cross connecting mechanism, dual composite contact, micro motor pre storage, micro electronic control technology, reliable mechanical interlock and electrical interlock technology technology to realize the isolation between power supply and load, the safety can be greatly improved, the service life of up to 8000 times more than one design, electromechanical switch flexible, accurate, safe and reliable, small volume, light weight and other advantages.           In the dual power automatic switching switch on the installation and use of some necessary conditions, the temperature limit is: the upper limit of 40 degrees, -5 degrees off the line, the ambient air temperature in the average of 24 hours can not be more than 35 degrees. Installation elevation must not exceed 2000m. Relative humidity in the ambient air temperature of +40 DEG C can not exceed 50%, at the bottom of the temperature can have a higher relative humidity, but the maximum relative humidity can not exceed 90%, the temperature can not be less than 25 degrees C.                

Double power automatic switch in relation to the safe use of electricity, when in use must comply with the relevant regulations, when there is a breakdown or emergency situations in the commonly used power, standby power during the operation, the operation duty shall not leave the generator site, at the same time according to the change of load voltage to adjust the voltage and the frequency, which can deal with abnormal accident case. In the city to restore power supply, the power should be done in a timely manner between the conversion, cut off the standby power supply, restore power supply.