Aiming at an abnormal event of protection device caused by poor contact of isolation switch under 3/2 connection mode, the characteristics of contact temperature rise caused by the equal circuit under 3/2 connection mode, current distribution, the increase of contact resistance and line load are analyzed. The characteristics are compared with that of temperature rise caused by poor contact of isolation switch under double bus connection mode. The relationship and differences between contact temperature rise caused by poor contact of isolation switch and the change of load and preferred circuit resistance under 3/2 connection mode are obtained.
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王来源,雷昌成.一起3/2接线方式敞开式隔离开关发热故障分析[J].四川电力技术,2023,46(1):90-94. WANG Laiyuan, LEI Changcheng. Heating Fault Analysis of Open-type Isolation Switch under 3/2 Connection Mode[J]. SICHUAN ELECTRIC POWER TECHNOLOGY,2023,46(1):90-94.