灭磁开关合闸线圈烧毁的事故分析及改进

Fault analysis of and improving measures for field breaker closing coil burning

通过对灭磁开关合闸线圈烧毁事故的分析,指出其原因是由于合闸接触器线圈通过跳闸位置继电器线圈自保持所致,提出了相应的预防措施,并在一些水电站上应用效果较好。

Based on an analysis of field breaker closing coil burning faults, it is pointed out that the cause for these faults is the automatic holding of closing contactor coil is carried out by the relay coil at trip position. The author also put forward some prevention measures which had been applied at some hydropower plants rendering relatively good effect.