The BKM5 series molded case circuit breakers are suitable for AC 50Hz power distribution networks with a rated insulation voltage of 1000V, a rated operating voltage up to 690V, and a rated current from 12.5A to 1600A. They are used to distribute electrical energy and protect lines and power equipment from damage caused by overload, short circuit, and undervoltage. They can also be used for infrequent starting of motors and for overload, short circuit, and undervoltage protection. Circuit breakers equipped with Vigi residual current protection modules can only have top-inlet wiring. The MIC5.0E intelligent circuit breaker can only have top-inlet wiring. Other specifications of circuit breakers can have either top or bottom-inlet wiring. This series of circuit breakers has an isolation function. This series of circuit breakers can be installed vertically (i.e., vertical mounting) or horizontally (i.e., horizontal mounting). This series of circuit breakers conforms to the following stand