The LMM3Z series electronic molded case circuit breaker is a new generation product with high breaking capacity newly developed by our company. It has Ics=100%Icu short-circuit breaking capacity. This series has 6 structural segment levels, namely LMM3Z-125, LMM3Z-160, LMM3Z-250, LMM3Z-400, LMM3Z-630, and LMM3Z-800. The rated current ranges from 100A to 800A, rated insulation voltage is 1000V, can work at AC50Hz, TN TT and IT power distribution systems with rated voltage below 690V. It is mainly used to protect distribution lines and motors from overload, short circuit, grounding and other fault hazards.
This series of circuit breakers has a variety of intelligent protection functions (such as: overload long delay, short circuit short delay, short circuit instantaneous, ground fault, blocked rotor blocking fault and phase unbalance fault, etc.). Users can set the protection parameters according to the actual load conditions. The protection is flexible, the action is precise, and the reliability of power supply is improved. This series of high-performance circuit breakers also have communication functions and can realize the “four remote functions” over long distances: remote signaling, telemetry, remote adjustment and remote control, which facilitates users’ intelligent digital management of the power grid.