Short circuit excitation

hi,

Understand you are new in Forum. Are you a uG student? if yes, read your text book first and generate a specific query. If not study vendor manuals and come-up what you are not understanding. I hope you need to learn basic principle first.

Hello,

This is not the answer to my question/doubt.

If you dont know please dont harm my prestige

Any way, SCM(short circuit maintenance)CT is responsible to increase the excitation current during fault and to maintain the voltage normal, so that the protective devices operates properly.