zigzag earthing transformer faults
zigzag earthing transformer faults
(OP)
We use zigzag transformer for grounding purpose. we connect the zigzap earthing transformer in secondary side of power transformer which is delta connected and have 100 MWA power. it is istalled in our transmission substation.
When the fault(when come from close point) is occured in distribution side our earting transformer is tripped with bucholz relay.
Can you tell me what might be the reasons? and what is the solution this type of problems? How can we overcome this problem?
When the fault(when come from close point) is occured in distribution side our earting transformer is tripped with bucholz relay.
Can you tell me what might be the reasons? and what is the solution this type of problems? How can we overcome this problem?






RE: zigzag earthing transformer faults
See thread238-204140: Design of zig zag earthing transformer in an 11kV system
RE: zigzag earthing transformer faults
Check buchholtz relay connection/installation. Are was rainy?
Best Regards.
Slava
RE: zigzag earthing transformer faults
I never saw zig-zag transformer protected by buchholz relay.
We used it usually for power equipment above 1 MVA.
RE: zigzag earthing transformer faults