ZM-4-PKZ2

Each trip module has a coordinated, independently adjustable, over-current trip (yellow dial) for overload protection (0.6 -1.0 x Iu) and an adjustable, instantaneous, magnetic trip (red dial) for short circuit protection (8.5 – 14 x Iu). Each dial can be set in accordance with the motor full load current and inrush, making it ideal for installations with varying motor efficiencies. All trip modules have temperature compensation from –5° C (23° F) to +40° C (102° F) and include built-in single phase protection.

In the event of an over-current or short-circuit situation, standard ZM trip modules cause the motor protective switch mechanism to open and disconnect power to the load, much like the operation of an inverse time molded case breaker. They make excellent manual motor starters, not only because of their all-in-one design and excellent thermal protection, but because they also provide “close” individual protection from short circuits.