Use digitalized RDCPS(KB0) as main switch, integrated the functions of fuse, circuit breaker, contactor, starter, isolator, thermal relay, overload (or over current, phase missing) protection relay, motor protector, intelligent leakage circuit breaker(relay) etc. low voltage appliance together, through combine the mechanical interlock and electrical interlock accessories to form reversible motor control and protection switching device RDCPS(KB0)-N, suitable for motor reversible or two way control and protection, product can install with relevant accessories as per to request, have the advantages of high reliability, high breaking capacity, long working life, small size, small mounting space, less maintenance job etc.