@RRaghunath ,sorry to bother you can you give me more explanation on the design ground fault current or do you have any material you can refer me to?
thank you in advance
@RRaghunath thank you ,your assumption is right.just to be sure when you mean the rated ground fault current are you talking about rating of the grounding transformer?
To give more detail on the issue the Transformer is a 132/15 kv Ynd11 the LV side is earthed through an earthing transformer.the question is how to decide the ratio for the neutral CT of the earthing transformer and main transformer.
can i get a guide on how i can select the ratio of C.T.’s employed in grounding transformer protection schemes?the plan is to use this neutral CT for REF protection i want to know how to decide on the ratio for the neutral CT of the earthing transformer.
