1.1 NCH8- □ M series Manual Modular AC contactor(here inafter referred as contactor)is mainly used in power systems with AC 50Hz/60Hz,rated operating voltage up to 400V and rated operating current up to 63A.It is used as remote or manual switch for circuit control under AC-7b and AC-7a(non-inductive load or low-inductive load/ resistance furmace,domestic appliance and low-inductive load of similar applications)application category.The contactor shall not be used for breaking short-circuit current,therefore it should be used with a proper short-circuit protection device. 1.2 Standard:IEC/EN 61095、IEC/EN60947-4-1