Patent ID: 8077442

Claim:
A lightning arrester comprising: a serial unit including a nonlinear voltage resistor block formed with a stack of a plurality of nonlinear voltage resistors, and a compression spring that is arranged at one end of the nonlinear voltage resistor block and that exerts a predetermined reaction force on the nonlinear voltage resistor block in its stacking direction; a pair of electrodes arranged to sandwich the serial unit in its stacking direction; a plurality of insulating rods arranged around the serial unit along its stacking direction to couple the electrodes; a plurality of fastening members that fastens the insulating rods and the electrodes; and an insulating outer covering member that integrates internal elements including the serial unit and the insulating rods by directly covering the internal elements, wherein each of the electrodes has a plurality of insulating-rod inserting holes for inserting end portions of the insulating rods, and a plurality of fastening-member mounting holes each being perpendicular to a corresponding insulating-rod inserting hole, and both end portions of each of the insulating rods have a fastening-member through hole such that the insulating rods and the electrodes are fastened by inserting the fastening members through fastening-member through holes and mounting the fastening members on the fastening-member mounting holes.