Starting insurance for starting injection and running out circuit

Published:2011/7/5 10:32:00 Author:John | From:SeekIC

Three-phase motor’s starting current is large, which is generally three times more of the motor’s rated current. If the chosen fuse (also known as fuse) is with a larger rated current, it is rater detrimental to the protection for the motor. The phenomenon of frequent burning of insurance frequently occurs even if it is in the right size. The circuit as shown can be used to resolve this contradiction. As for the figure, FU1 is the motor main fuse with the right size and FU2 is a launching insurance. Rated current of FU1 should be equal to the motor’s rated current. And rated current of FU2 is generally equals to that of the FU1.



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