What is the TA disconnection criterion for line protection?

June 12, 2020 2:20 am

* Question

* Answer

① The difference between the self-produced zero-sequence current and the external zero-sequence current is greater than a certain value, and the TA abnormal signal is sent out after a delay;
② There is a self-produced zero-sequence current and no zero-sequence voltage, and the TA abnormal signal is delayed.