Description of the function of varistor protection (I)

     Isolation function. This function keeps the varistor in a sealed box, separated from other circuits, to prevent the extension of the varistor fog and combustion.

     Current fuse function. This function wraps the varistor and the current fuse in series and uses heat conduction to fuse the leakage current on the heat transfer current fuse formed on the varistor. When the temperature is raised to the setting temperature of the current fuse, the current fuse fuses. Remove the varistor from the circuit.