This MicroLogic 6.3 E (Energy) 4-pole 4d electronic trip unit is an electronic trip unit used on ComPacT NSX 400/630 circuit breakers. This 400A rated electronic trip unit is the best choice for all standard and special applications. It has customizable long-term protection against overloads. It also offers customizable short-time delayed short-circuit protection and instantaneous short-circuit protection. It has additional and adjustable ground fault protection. MicroLogic 6.3 E indicates overloads with alarm LEDs. The green Ready LED flashes when the circuit breaker is ready to trip. MicroLogic 6.3 E 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.