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Micrologic Trip Unit Temporarily Loses Communications After Tripping
Powerpact P and R, Compact NS, and Masterpact NT and NW, Micrologic Trip Unit (see table for designations).
|Trip Unit||Trip Function||Type|
|2.0A (IEC Only)||LSO||Standard|
Application using breaker communication.
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 below link or attached document for the data bulletin regarding this behavior.
Micrologic Trip Unit: Communication After Tripping 0600DB1304