对一起370MVA主变压器分接开关损坏的原因进行了分析，介绍了处理经过，提出了反事故技术措施。

The Tapping switch damaged of a main transformer which power is 370MVA was analyzed, the handling process the measure of preventing accident were provided.

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在变电站综合自动化工程设计中，对于主变压器分接开关位置的显示，常规方案是需加装档位变送器。

In engineering design of integrated automation of substation, the display of tap changing switch position for main transformer is to add position transducer in the conventional scheme.

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