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Selection of AC contactor
(1)According to the contactor is control object, the number of operation and the use category, the contactor of the corresponding category is selected.(2)Select the rated voltage of the line at the position of use.
The selection method of fuse
(1) The protection characteristics of the fuse and the overload ability of the object to be protected should be matched so that the protected object can be reliably protected in the whole range.