1、the fault and abnormal phenomenon of distribution transformer：
1）The
transformer is always abnormal when the
transformer tranmiss the power after stop or commissioning transmission, for example, two phase high one phase low or the the value is zero; or the voltage of three phase of some commissioning
transformers are all very high and thus some elctrical equipment are burned down for the over high voltage；
2）HV fuse burn down that can not tranmiss the power.
3）the
transformer can not tranmiss the power after thunderstrom.
4）
transformer noise is abnormal, for example,the "zizi" or "pipi" sound, or the frog sound during the operation.
5）The HV post heat burnt down, and there are serious damage or flashover signs in the HV bushing.
6）the oil temperature continuously rise under the normal cooling condition.
7）great change of the oil color, it maybe that there is carbon in the oi.
8）There is abnormal sound, and the oil injects from the pressure-relief vent, oil conservator, the oil tank and the radiating collar distort, leak oil and penetrate and so on.
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