Guidelines For Safe Operation And Risk Prevention Of High Voltage Drop Fuses

drop out fuse cut out relies on the heat of the arc when it is melted, and the gas generated in the fuse tube is ejected to blow out the arc. When the short-circuit current is too large, the arc is too strong and the gas cannot blow out the arc, so the upper limit of the breaking capacity is specified; when the short-circuit current is too small, the gas generated is too small and the arc cannot be blown out, so the lower limit is specified. When the fault current is greater than the upper limit, or less than the lower limit, drop out fuse element cannot reliably extinguish the arc, which will cause an arc short circuit, causing drop out fuse in transformer to burn or even explode, expanding the accident.