Fully automatic AC voltage regulator is a commonly used power equipment, which is mainly used to regulate voltage stable output to protect electrical equipment from voltage fluctuations. However, there are times when a fully automatic AC regulator fails or is damaged due to overvoltage, which needs to be addressed in a timely manner. The following is a detailed introduction to the solution of overvoltage protection for fully automatic AC voltage regulators. 
Overvoltage protection is an important function of the automatic AC voltage regulator, which is used to disconnect the output circuit in time when the input voltage exceeds the set range to prevent equipment damage. Over-voltage protection is usually achieved through the voltage detection circuit at the input terminal, and when the voltage is detected to exceed the set value, the controller will send a signal to trigger the over-voltage protection function. Here are a few ways to solve the problem of overvoltage protection for fully automatic AC regulators:
1.Check the input voltage: First of all, confirm whether the input voltage really exceeds the set range, sometimes the voltage detection circuit may be faulty and falsely overvoltage. The input voltage can be measured using a tool such as a digital voltmeter to ensure that it is within the normal range.
2.Adjust the overvoltage protection parameters: In other cases where the input voltage is confirmed to be normal, you can try to adjust the overvoltage protection parameters and increase the set value to adapt to the actual voltage fluctuation range. Generally speaking, fully automatic AC voltage regulators have certain overvoltage protection parameters that can be adjusted.
3.Check the overvoltage relay: The overvoltage protection is usually realized by the overvoltage relay, check whether the relay is working properly, whether there is damage or poor contact and other problems. Relays need to be replaced or repaired in a timely manner to restore normal function.
4.Check the controller and circuit board: Sometimes the overvoltage protection function is realized by the controller or circuit board, check whether the circuit board has poor soldering, damaged components, etc., and needs to be repaired or replaced in time to resume normal operation.
5.Replace the bench: If the above methods do not solve the problem, it may be because there is a problem with the bench itself of the entire automatic AC voltage regulator, resulting in the overvoltage protection function not working properly. At this time, it is necessary to replace the new bench to ensure the normal operation of the equipment.
When solving the problem of overvoltage protection of fully automatic AC voltage regulators, it is necessary to operate with caution to avoid affecting the stability and safety of the equipment. If you can't solve the problem by yourself, it is recommended to contact the best business or professional and technical personnel for maintenance in time. At the same time, regular maintenance of the automatic AC voltage regulator can effectively reduce the occurrence of failures and prolong the life of the equipment.