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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?



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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