润色1 绕组及其引出线的相间短路； 2 中性点直接接地侧的单相接地短路；3 绕组匝间短路；4 铁芯局部发热和烧损；5 油面下降。

Revisions: (1) Phase-to-phase short circuit of windings and their lead-out wires; (2) Single-phase ground fault on the neutral point directly connected to the ground side; (3) Inter-turn short circuit of windings; (4) Local heating and burning of the iron core; (5) Decrease in oil level.