Maximum earth grid current
Maximum earth grid current
(OP)
Hi everyone,
We are doing the earthing calculation for 33/6.3kV SS.
There are 2 nos. 33/6.3kV , 30MVA transformer Dyn11.
For calculating the maximum grid current, should we consider
- Maximum switchgear fault current
0r
- Transformer 3 phase fault current at Y side
thanks for helpful replies.
We are doing the earthing calculation for 33/6.3kV SS.
There are 2 nos. 33/6.3kV , 30MVA transformer Dyn11.
For calculating the maximum grid current, should we consider
- Maximum switchgear fault current
0r
- Transformer 3 phase fault current at Y side
thanks for helpful replies.






RE: Maximum earth grid current
If less conservative approach is desired for design purpose this could be a fraction of the maximum available short circuit plus a margin for grow.
This fraction of current is typically called split factor as shown in the link below.
ht
RE: Maximum earth grid current
RE: Maximum earth grid current
Your replies really helped me.