1. 沒有進行適當?shù)木S護。

1. Not properly maintained.

2.濕氣:如遇水淹、漏水、屋頂漏水、油箱及絕緣油有濕氣，如水沿外殼或附件侵入。

2. Moisture: In case of water flooding, leakage, roof leakage, or moisture in the fuel tank and insulation oil, such as water invading along the shell or accessories.

3. 過載。變壓器的過載是指變壓器在多種運行條件下的超長時間。在電廠經(jīng)常發(fā)生超載的情況下繼續(xù)緩慢增加負荷，冷卻裝置不正常工作，變壓器內部故障等，導致變壓器超載運行。溫度過高會導致絕緣老化，紙張強度降低后絕緣，變壓器絕緣板過早老化。因此，外部故障的影響可能導致絕緣損壞，從而導致故障。

3. Overload. Overload of transformers refers to the prolonged operation of transformers under various operating conditions. Under the frequent occurrence of overloading in power plants, slow increase in load, abnormal operation of cooling devices, internal faults in transformers, etc., lead to transformer overload operation. Excessive temperature can cause insulation aging, resulting in a decrease in paper strength and premature aging of transformer insulation boards. Therefore, the impact of external faults may lead to insulation damage, resulting in faults.

4. 線的干擾。線路干擾是造成變壓器事故的主要因素。主要包括過電壓、低負荷時的峰值電壓、線路故障、閃絡等異常現(xiàn)象。這種故障在變壓器故障中占很大比例。因此，應定期進行沖擊保護試驗，檢測變壓器的抗勵磁電流強度。

4. Interference from wires. Line interference is the main factor causing transformer accidents. This mainly includes abnormal phenomena such as overvoltage, peak voltage at low loads, line faults, and flashover. This type of fault accounts for a large proportion of transformer failures. Therefore, regular impact protection tests should be conducted to detect the anti excitation current intensity of the transformer.