Current Transformer
Current Transformer
(OP)
Hello I'm new to this board. My question is:
1)Is there any PM(Preventive maint) to be carried out on current transformers?
2)Why CT explode? Possible reasons?
Appreaciate your inputs. Thanks
1)Is there any PM(Preventive maint) to be carried out on current transformers?
2)Why CT explode? Possible reasons?
Appreaciate your inputs. Thanks





RE: Current Transformer
Conducting the knee point voltage test for PS class CTs, occassionally, is another one.
When it comes to the question, why CTs explode, I think the most likely cause is open circuiting of CT secondary wiring. This can give rise to high voltage spikes across the CT secondary winding.
I have also seen failure of CTs (24kV class) with solid insulation and a shield (as part of insulation coordination). The suspected cause was loose wiring in connection shield - to - the primary conductor.
RE: Current Transformer
RE: Current Transformer
To be honest, I don't know how an open circuit on the CT leads could cause a CT to explode either. Sure the insulation breaks down and causes a short somewhere in the CT but this should not cause a CT to come apart.