Insufficient Implementation Of Measures Behind Dry-type Transformer Winding Short Circuit Accidents

Short circuits in windings dry transformer often occur between winding layers or turns. Due to aging of insulation materials, changes in electrical stress, or accumulation of manufacturing defects during long-term operation, if the voltage and thermal stress of the internal insulation exceed the set tolerance range, partial short circuits may occur in dry type transformer manufacturers. In actual testing, abnormal DC resistance or turns ratio test results often indicate internal problems.

Furthermore, improper installation methods, inconsistent fastener torque, and poor cable terminal contact can all cause localized arcing or heat accumulation in the winding of winding 750 kva dry type transformer. If these micro-faults are not identified in time, they can develop into obvious short circuit events. Before and during operation of winding 75 kva dry type transformer, infrared thermal imaging and electrical tests should be conducted according to specifications to detect winding abnormalities as early as possible.