... also be used for infrequently switch and starting of motor and for motor overload, short circuit and under-voltage protections. MM1 ... 14048.2 Low voltage breakers. IEC 60947-4 and GB/T 14048.4 Contactors and motor starters. IEC 60947-5.1 and GB ... electricity, including ac contactor, air pressure switch, magnetic starter, motor protector, starter delta starter, oil level controller etc. We mainly ...