This MicroLogic 6.3 EM (Energy) 3-pole 3d electronic trip unit is an electronic trip unit used with ComPacT NSX 630 circuit breakers. This 500A rated electronic trip unit is the best choice for motor protection applications. It features customizable long-term overload protection. It also offers customizable short-term protection and fixed instantaneous short-circuit protection. It offers phase unbalance or phase loss protection and additional and customizable ground fault protection. MicroLogic 6.3 EM indicates overloads with alarm LEDs. The green Ready LED flashes when the circuit breaker is ready to trip. MicroLogic 6.3 EM is equipped with a display module that provides energy measurements and allows fine adjustment. This product is part of our EcoStruxure Power architecture when combined with the PowerTag NSX and ComPacT NSX basic switch.