With the development of the electric power industry, electricity now has been accompanied by every detail of our lives, so that the protection for the power industry, began to get more and more attention, because the circuit in the daily work, it is easy because of overvoltage or undervoltage and a certain fault, the fault if not timely be stop or maintenance, very prone to fires and accidents are very serious, serious threat to our living, work safety, the use of over voltage and under voltage protection devices can guarantee the safe use of electricity in our working life.

Overvoltage and undervoltage protection devices is free to close and carrying all the current loop, the corresponding control, if the load current or the fault current, over voltage and under voltage protection devices will be very sensitive to these currents will be cut off, and the composite current can also have connection and compensation effect, so intangibles can to prevent the expansion of the accident, to ensure the safe operation of all circuits, so when all electrical appliances once super young or non normal operation of the case, as long as the failure, over voltage and under voltage protection devices will automatically disconnect switch, play a protective role for the line, and leakage protection, has strong function now, the use is very broad, can make more electricity safety prevention get promoted,

In a circuit, Overvoltage and undervoltage protection devices can be used to distribute electricity, do not need to start asynchronous motor is very frequent, can be very good for the implementation of the protection of the motor power supply line, once the machine overload occurs very serious or short way, in order to prevent the undervoltage fault over-voltage breaker can timely cut off the circuit automatically, the operation is very fast in the process, so that the function of very powerful combination functions as a fuse switch and over-voltage breaker, and analysis of fault current after also need not change parts, in the process of using very simple and convenient.

Overvoltage and undervoltage protection devices is very cheap now, and the installation and use is also very simple, the action time is very fast so that greatly control fault in the shortest possible time, to avoid causing more serious accidents, we all know that once the result of the electrical fire is very serious, so less the significance of using the high-voltage circuit breaker is very powerful, is the most critical can fit any electric monitoring and protection, greatly improve our electrical safety performance, so that electricity is very safe and no hidden state, for the daily work and maintenance, are also great role.