This MicroLogic 1.3 M is a 4-pole 3d 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 offers adjustable short-time protection and fixed instantaneous short-circuit protection. The green Ready LED flashes when the circuit breaker is ready to trip. This product is part of our EcoStruxure Power architecture when combined with the PowerTag NSX and ComPacT NSX basic switch.