简述变压器有哪几种常见故障？
["\uff081\uff09\u7ed5\u7ec4\u6545\u969c\u3002\n\uff082\uff09\u5957\u7ba1\u6545\u969c\u3002\n\uff083\uff09\u5206\u63a5\u5f00\u5173\u6545\u969c\u3002\n\uff084\uff09\u94c1\u82af\u6545\u969c\u3002"]
简述变压器有哪几种常见故障？
["\uff081\uff09\u7ed5\u7ec4\u6545\u969c\u3002\n\uff082\uff09\u5957\u7ba1\u6545\u969c\u3002\n\uff083\uff09\u5206\u63a5\u5f00\u5173\u6545\u969c\u3002\n\uff084\uff09\u94c1\u82af\u6545\u969c\u3002"]