The Micrologic 5.0 H (harmonic measurement) is an electronic trip unit used in Masterpact NW circuit breakers. The trip unit is designed to protect circuits and loads. It features an adjustable long-time overload protection, a short-time delayed, and an instantaneous short-circuit protection. The Micrologic indicates an overload condition with an alarm LED. Additional trip causes are displayed via three extra LEDs. The device is equipped with a digital LCD screen that shows the actual effective values for current with an accuracy of 1.5%. This trip unit can be integrated into a Masterpact NW circuit breaker.