Why would a Micrologic trip unit temporarily lose communications after tripping?
Product Line:
Powerpact P and R, Compact NS, and Masterpact NT and NW, Micrologic Trip Unit
Resolution:
The Micrologic trip unit is designed so that when it trips the circuit breaker, it communicates the cause of trip to the breaker communications module (BCM) and then temporarily breaks communications to the BCM. It takes up to three seconds for communication to be restored between the trip unit and the BCM. During this time, if there are any communication requests from the supervisory software, a communication loss might be observed.
After this communication break, the trip unit automatically restores communications to the BCM. See the attached document for the data bulletin regarding this behavior.
Publisert for: Schneider Electric Norway
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