... 1.Metal-plastic shell dust-proof,water-proof 2.soft-start,soft-stop 3.220v,380v,440v,660v,110v are ... 's existing system,saving expenses for restructuring of system.5.Motor protectionMultiple motor protection functions such as over-current,imput ... of thyristor and overheat protection can guarantee motor soft starter not to be damaged in case of fault or incorrect operation. soft starter for motor