Molded Case Circuit Breakers (M Frame)

Square D by Schneider Electric’s PowerPact Multistandard circuit breakers are equipped with dual-break rotating contacts that reduce the amount of peak current during a short-circuit fault. They feature an over-center toggle mechanism providing quick-make, quick-break operation. Internal cross-bars provide common opening and closing of all poles with a single handle. The circuit breaker handle can assume any of three positions, ON, tripped or OFF. The center tripped position provides positive visual indication that the circuit breaker has tripped.

PowerPact M-frame circuit breakers are designed to protect electrical systems from damage caused by short-circuits and overloads. They are equipped with an electronic trip unit which simulates the function of a thermal magnetic trip unit, but provides precise tripping and is not sensitive to temperature changes. They are available in an adjustable amperage trip unit capable of 300 to 800 A settings, or a fixed amperage device rated at 400 or 600 A. PowerPact M-frame circuit breakers come in 2 and 3 pole designs with unit-mount and I-line constructions.