Industrial fb600e RMS Trip Unit

FB600E RMS Trip Unit is a static trip relay designed to serve as the trip device for compatible low-voltage circuit breakers, delivering RMS-sensed protection for feeders and motors across industrial switchgear. It is used to initiate protection trips based on magnitude of current measured by the CTs, enabling coordination with other protective devices and ensuring consistent trip curves. The unit uses RMS sensing and provides adjustable CT ratio settings from 0.50 to 1.00 times the circuit-breaker CT rating, with a defeat option for testing or special configurations, plus configuration options to tailor pickup and time delays for LT and ST functions. It includes GRD and INST trip features and supports long-time and short-time protections. Frequently cataloged as model FB600E by Carriere Technical Industries (also seen as Carrier Technical), this RMS trip unit is sold as a replacement trip module for FB600E systems and is distributed by multiple suppliers and electronics distributors worldwide.