A typical operation and maintenance case of converter transformer is introduced.Firstly,the conventional test,withstand voltage test,induced voltage test,long-time no-load test and overcurrent test are analyzed after the converter transformer being returned to the manufacturer,and it is determined that there exists overheating fault inside the converter transformer.And through the disassembly of hanging core,it is found that the core of converter transformer is short circuited between pieces and the winding is burnt,which confirms the previous test judgment.Finally,some suggestions are put forward for the following process improvement and factory test of this series of products.
converter transformerinduced voltage testlong-time no-load testovercurrent testdisassembly inspection
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