TSXDSZ32T2
8故障排除
下表显示了异常情况下的一些症状、可能的原因和补救措施
情况：–
异常工作条件
故障原因补救
过压改变电路电压或变压器
避免过励磁的连接。
过电流，过电流
如果可能，减少负载。加热可以减少
通过提高负载功率因数。检查平行线
循环电流电路，可能是
由不正确的比率或阻抗引起的。
高环境温度可改善通风或重新安置变压器
在较低的环境温度下。
冷却不足如果机组人为冷却，请确保冷却
充足的
机油油位低，请将机油加满至适当的油位。
变质/污泥
油的形成。
使用压滤机冲洗铁芯和线圈。
过滤机油以去除污泥。
短路铁芯
测试励磁电流和空载损耗。如果高
检查芯并修理。参见电气故障，
在下面
电气故障/
绕组故障
雷电、短路、，
低过载油
介电强度。
通常，当变压器绕组发生故障时
变压器自动从
断路器的电路。
高绕组/
机油温度

8 TROUBLE SHOOTING Following table shows some of the symptoms, possible causes and remedies in case of abnormal situations: – ABNORMAL OPERATING CONDITIONS TROUBLE CAUSE REMEDY Over voltage Change the circuit voltage or transformer connections to avoid over excitation. Over current If possible, reduce load. Heating can be reduced by improving power factor of load. Check parallel circuits for circulating currents, which may be caused by improper ratios or impedances. High ambient temperature Either improve ventilation or relocate transformer in lower ambient temperature. Insufficient cooling If unit is artificially cooled, make sure cooling is adequate. Low oil level Top up oil to proper level. Deterioration/Sludge formation of oil. Use filter press to wash off core and coils. Filter oil to remove sludge. Short circuited core Test for exciting current and no-load loss. If high inspect core and repair. See Electrical Troubles, below. Electrical Troubles/ Winding Failure Lightning, short circuit, Overload Oil of low dielectric strength. Usually, when a transformer winding fails, the transformer is automatically disconnected from the circuit by the circuit breaker. High Winding/ Oil Temperature