Why is the current transformer burnt out during use?

- Oct 07, 2020-

There are many reasons for the current transformer to burn out. The following are the most common reasons. The current transformer is turned on for the second time, generating a high voltage, causing the current transformer to burn out. Due to the long use time and aging of the insulation, local breakdown or discharge will occur, resulting in overvoltage and current transformer heating and burning. The primary contact surface between the current transformer and the aluminum bar is too heavy, and the contact resistance is too large, causing the current transformer to be heated and burned. The user has been overloaded for a long time, causing the current transformer to burn out.

How to prevent the current transformer from burning out? First of all, the circuit breaker is installed to avoid branch circuit faults and power outages of the entire line, especially to ensure that the branch circuit breaker can trip reliably. Connect the current transformer behind the circuit breaker to ensure that the circuit breaker and arrester can work normally when the transformer fails. It is necessary to strengthen the high-voltage insulation test of the current transformer and the arrester, find out the aging degree of the transformer and the arrester as soon as possible, and replace it in time to avoid transformer failure. Finally, equipment should be cleaned regularly to reduce pollution and avoid insulation degradation.

When using ct, carefully check whether the secondary circuit is disconnected and whether the contact resistance is too large. The most important thing is not to run overload. In addition, if the insulation is found to be aging, it should be maintained and replaced in time. It should be cleaned regularly to reduce pollution. Only in this way can current transformers be used more safely and have a longer service life.https://www.ctsensorducer.com/