Thank you all for the quick responses
I was referring to the EF protection against EFs also in the associated system components. I’m not very familiar with the protection relaying but I read in some book that the pick-up current of the EF relay should be in the range of 10-25% of full load...
Hi to all,
I have a power transformer MV/LV with its secondary solidly grounded. What would be the ration of the CT used in the grounding circuit for the grounding protection? Should this CT match the CT’s used in the secondary phase o/c protection?
As an example 2MVA, 13,8/0,48kV, solidly...