All,
Thank you for your inputs to my subject. All was very helpful indeed. The only question still needs an answer is; are there any rules, regulations and/or standards for the implementation of this verification?
We have a 16kV switchgear fed from mains and stand-by generator (16kV). We want them to have the same phase sequence. We want to verify the sequence at secondaries of VT's. Is there a regulation that they have to be verified from primary side, or secondary side is acceptable as well?