Automatic Transfer Switch Working Principle

The working principle of Automatioc changover switch is to realize the automatic conversion of dual power supplies based on real-time monitoring of the power circuit status.

Specifically, the automatic transfer switch has two power inputs: the normal power supply A and the backup power supply B. When the normal power supply A is working normally, the load is powered by it. Once the A power supply fails, such as voltage fluctuations, power outages, etc., the automatic transfer switch will quickly detect this state change and immediately start the switching mechanism to automatically switch the load from the faulty power supply to the backup power supply B to ensure that the load will not be powered off. This switching speed is very fast, usually within 50 milliseconds, thus ensuring the continuity and stability of the power supply.

In addition, according to the operation mode, the automatic transfer switch is also divided into PC level and CB level. The switching element of the PC level is a load switch, which has a faster switching speed and is suitable for occasions with high switching speed requirements; while the CB level is a circuit breaker, which is suitable for occasions that need to handle high current faults due to the arc extinguishing device.

In general, the automatic transfer switch ensures the continuous power supply and power safety of the circuit by real-time monitoring of the power supply status and fast switching of the power supply.