Treatment of abnormal operation of current transformer core

Treatment of abnormal operation of current transformer core


1. The operating sound of the current transformer is abnormal:

1) The reasons for the abnormal sound of the current transformer during operation are:

① The iron core is loose, making a "buzzing" sound that does not change with the primary load; in addition, the unevenness of the semiconductor paint is applied

The internal corona and the loosening of the iron clamp screw will also cause the current transformer to produce a louder noise.

② Certain silicon steel sheets that leave the stack will have a certain "humming" sound when there is no load or light load.

③ The secondary circuit is open.
2) Handling of abnormal operating sound of current transformer:

① During operation, if abnormal sound is found in the current transformer, it can be judged from the sound, meter indication and protection abnormality whether the secondary circuit is open; if so, it can be dealt with according to the treatment method of secondary circuit open.

② If it is not an open circuit fault of the secondary circuit, but a fault of the main body, the load should be transferred and the power outage treatment should be applied.

③ If the sound is abnormally low, the power supply may not be cut off immediately; however, monitoring must be strengthened, and at the same time, it must be reported to the superior dispatcher and supervisor to arrange for the treatment of the power cut.
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