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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?
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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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2. If 8.35%Z means the percentage impedance of 132/11kV transformer self,will like to reconfirm the percentage impedance that is supplied from power company?
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