1. There is an abnormal noise or over-temperature of the iron core
Cause of failure: When the current transformer is in operation, if there is an open circuit or overload in the secondary circuit, it will lead to abnormal sound and over-temperature of the core.
Solution: Interrupt the operation of the equipment, reduce the load to the rated load requirements, or replace the current transformer with a new one.
2. Abnormal operation.
The cause of the fault is that the open circuit and the anchor bolt are loose, which will lead to abnormal phenomena in the operation of the current transformer.
Solution: In view of this situation, the repair personnel need to think carefully and judge, and can use the temperature test wax sheet to carry out the test when inspecting, and when checking the secondary open circuit, the ammeter can be marked as "0".
3. The secondary circuit is opened.
Cause of failure: The magnetic flux in the iron core is rounded, resulting in spark discharge, hot iron core, and scorched and smelly insulation layer.
Solution: Immediately interrupt the operation of the equipment, if the power cannot be cut off immediately, it is necessary to reduce the amount of primary load current, and use special tools to connect the line at the open circuit point, so that it is in a short-circuit state, and then disassemble the line after the problem is solved.
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