what is the difference between the 94 lockout relay and 86
lock out relay. I have noticed that the 94 lockout relay is
activated when the distance realy is activated and 86 is
activated when the 87T differential is activated. but why
can't the same lockouts be used for both the protection
schemes
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Answer Posted / k.prakashchandra
94 lockout relay is for line fault only. 86 lockout relay
is master trip relay. It trips both primry and secondary of
the transformer as the fault is of serious nature.
| Is This Answer Correct ? | 2 Yes | 12 No |
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