I have an existing 11/3.3kV transformer, rated at 12MVA, which has one CT in the secondary star/neutral connection. The CT is located in the transformer 3.3kV cable box and is rated at 50/5A, 25VA, Class 3. Neutral earthing of 3.3kV is by 20A NER.
We will have new switchgears at 11kV and...