What are the default Micrologic trip unit settings for Masterpact, Powerpact, and legacy circuit breakers?
Powerpact P frame, Powerpact R frame, and Masterpact circui breakers
Default settings for Masterpact and Powerpact circuit breakers with Micrologic trip units:
The Ir or Long Time dial is set at 1.0.
All other trip unit adjustments (long-time delay, short time pickup and delay, instantaneous, ground fault pickup and delay) are set fully counter-clockwise at their lowest settings.
These settings are typically changed when the circuit breaker is installed; settings for a specific application must be determined by a qualified consultant or plant engineer. A coordination study is recommended to provide coordination between all circuit breakers in the distribution system.