toxicity assessment

To solve this problem,introduced to the use of short-circuit test to verify TA polarity and the wiring is correct,and done a practical calculation and analysis.

变压器投运时,当低压侧只有站用变,没有其它负荷或负荷很小,就无法带负荷检查TA极性及接线方式是否符合设计要求。

The basic principles of transformer zero-sequence differential protection and its TA polarity field configuration are introduced,at the same time,the main reason of transformer zero-sequence differential protection malfunction is proposed.

介绍了变压器零序差动保护的基本原理及其TA极性现场配置方法,指出变压器零序差动保护误动的主要原因。