How many types of Differential protection are there? and what the special arran

How many types of Differential protection are there?
and what the special arrangement are made at the time of
charging of a transformer on the Differential protection?

Question Posted / gopal.mewara

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How many types of Differential protection are there? and what the special arrangement are made at t..

Answer / nur.asidik

in fact, there are two.
-lowZ
-Hiz

2nd harmonic blocking should be employeed to prevent relay trip during Tr stating up,

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