Once the CT is burned down, it will be a great loss for both the user and the power supply company. How to prevent the CT from being burned down?

First of all, let's understand the reasons why the current transformer is burned. The reasons are as follows:

How to prevent the current transformer from being burned?

Because of the secondary open circuit, a high voltage is generated, and the high voltage causes the current transformer to be burned.

If the current transformer has been used for a long time and the insulation is aging, it is easy to have discharge or breakdown and overvoltage, which will also lead to the problem of heating and burning out of the transformer.

After the current transformer is connected to the aluminum bar at the first time, there is a great oxidation on the contact surface, which leads to a great resistance on the contact surface. As a result, the temperature of the current transformer rises and burns down.

In addition, if the current transformer is overused, it will also be burned.

How to prevent the current transformer from being burned? The following measures can be effective prevention, let's take a look:

Install branch circuit breaker, which can well avoid branch fault spread to the whole feeder power failure, when the power side needs single-phase grounding, it can automatically trip.

Use a metering current transformer and connect it to the back of the circuit breaker so that in the event of a fault, the circuit breaker can automatically remove the fault.

The service life of the current sensor is limited, and the general service life is 4 years. Coveted users need to check the high-voltage insulation test of the current transformer frequently. If it is found to have signs of theater aging, then replace it in time.

Clean the equipment regularly to reduce the dust and oil stains on the surface of the product and ensure good insulation.