... 5, According to overload release type: Magnetic release (only instantaneous) the modynamicmagnetic type (dual), electronical release; 6, According to number of ... release on N pole, which is making at the time; Not closing and openingwith the other three poles. 9, Type B: No ... D: With overload release on N pole, which making all time; Not closing and opening withthe other three poles. Main ...