Electrical Current Transformer saturation point method and measures to prevent burning

In order to check whether the excessive current of the Electrical Current Transformer will be full and affect the correctness of the maintenance action, the direct experimental method is to carry the practical load on the secondary side and pass the current through the primary side. In addition, the transformer factory can also test the full point of the Electrical Current Transformer through the volt-ampere characteristic experiment.

The full electrical current transformer is because the core magnetic flux density is too large to calculate the full current of the electrical current transformer. The experimental method for the volt-ampere characteristics of the transformer factory is: the original side opens a circuit, and the current is passed in from the secondary side to measure the voltage drop on the secondary side winding. Because the original side of the Electrical Current Transformer is open, there is no demagnetization effect of the original side current, and the iron core is simple and full under the effect of a small current. Therefore, the volt-ampere characteristic experiment does not need to add a large current, and it is relatively simple to complete on site.

There are many reasons for the burning of the Electrical Current Transformer. For example, the Electrical Current Transformer’s secondary open circuit will generate high voltage, which will cause the Electrical Current Transformer to burn out; if the use time is too long, the insulation will be aging, part of the breakdown or discharge will occur, and overvoltage will occur. Current Transformer heats up and burns out; Electrical Current Transformer is too oxidized to the touch surface of the aluminum row at one time, the touch resistance is too big, and the heating causes the Electrical Current Transformer to burn out; the user overloads for a long time, which causes the Electrical Current Transformer to heat and burn out, etc.

To prevent the Electrical Current Transformer from being burned, the first step is to install a circuit breaker to prevent branch faults from power outages involving the entire line, especially to ensure that the branch circuit breakers can be reliably tripped. Then connect the Electrical Current Transformer to the back of the circuit breaker to ensure that the circuit breaker and arrester operate correctly when the transformer is faulty.

It is also necessary to strengthen the user's Electrical Current Transformer and lightning arrester high-voltage insulation experiments, early detection of the insulation aging degree of transformers and arresters, and timely replacement to prevent the occurrence of transformer burns and power outages. It is to clean the user's equipment regularly to reduce pollution and prevent insulation degradation.

When using the Electrical Current Transformer, carefully check whether the secondary circuit is open and whether the touch resistance is too large. It is important not to overload it. In addition, the Electrical Current Transformer must be protected and maintained. If the insulation is found to be aging, it must be replaced in time, and it must be cleaned regularly to reduce pollution. Only in this way can the Electrical Current Transformer be used more safely and has a longer service life.