What is C.T, why it is used and what care should be taken
for that while connecting?

Answer Posted / pankaj desai

CT is Current Transformer which can be used for both
options either for measurement of Current or for Protection
system.

Secondary of CT should be shorted all times as high voltage
will be generated which may be harmful for the person
working on system as well as to the system where CT is in
use & damage insulation.

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