Transformer core with time - limited current quick - break protection device
2016/11/13 view:
Transformer core can be used as main protection or back-up protection of this line and back-up protection of adjacent lines. It is in accordance with the maximum load current setting, the action time limit according to stage selection. Transformer core quick-break protection: There are no time limit and time limit. The non-time-limiting current-limiting protection device of the transformer core is set according to the fault current. When the line is faulty, it can operate instantaneously. The protection range can not exceed the end of the line. Therefore, only part of the line can be protected.
When the line is protected with no time limit, there is no protection range. In order to achieve fast protection for the whole length of the line, it is often adopted that the current-time breaking with the time limit is matched with the lower-level non-time current quick-break protection. , The protection scope includes not only the whole line but also the first level protection zone of the adjacent line, but does not protect the whole adjacent line, and its action time is longer than that of the adjacent line without time-limit quick-break protection.
The high-voltage side and low voltage side of the current transformer secondary winding, near the transformer side of the terminals together, we call the CT side of the transformer.
When the line is protected with no time limit, there is no protection range. In order to achieve fast protection for the whole length of the line, it is often adopted that the current-time breaking with the time limit is matched with the lower-level non-time current quick-break protection. , The protection scope includes not only the whole line but also the first level protection zone of the adjacent line, but does not protect the whole adjacent line, and its action time is longer than that of the adjacent line without time-limit quick-break protection.
The high-voltage side and low voltage side of the current transformer secondary winding, near the transformer side of the terminals together, we call the CT side of the transformer.
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