7SR18 Description Of Operation
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Figure 4.8-1 Logic Diagram: Circuit Breaker Status
Trip Time Alarm
The CB Trip Time meter displays the measured time between the trip being issued and the CB auxiliary contacts
changing state. If this measured time exceeds the Trip Time Alarm time, a Trip Time Alarm output is issued.
Trip Time Adjust
This allows for the internal delays caused by the relay – especially the delay before a binary input operates – to
be subtracted from the measured CB trip time. This gives a more accurate measurement of the time it took for the
CB to actually trip.
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