变压器无激磁分接开关故障分析

Analysis on Transformer No-exciting Magnetism Tap Changer Fault

煤矿变电所主变压器由于长期三相直流电阻不平衡,导致分接开关严重积炭,绝缘油闪点降低,危胁主变压器安全运行。运行的主变压器由于分接开关定位螺丝及接触不良,造成变压器保护装置动作。文章总结了主变分接开关发生故障的原因及注意事项。

The long-term unbalance of the three-phase direct-current electric resistance of the coal mine substation host transformer,has led to grave product of tap changer charcoal,insulation oil flash point reduces,threatens the safe operation.The screw and bad contact of the top changer of the working host transformer,has brought about a transformer protecting device action.The fault reasons for the tap changer of the host transformer,and matters needing attention are summed up.