| 摘要 |
A gas-tube arrester includes an arrester body containing an inert gas and having first and second electrodes positioned in spaced, facing relationship to each other and separated by an insulator. An insulating, heat-resistant film is in contact with the first electrode and has an opening and a plurality of small holes. A metal plate layered on the insulating film has an opening communicating with the opening of the insulating film. A low-melting point metal plate layered on the metal plate to cover the openings has a melting point lower than a softening temperature of the insulating film. A conductive leaf spring is electrically connected to the second electrode and presses the low-melting point metal plate toward the metal plate, so that, when a high voltage is applied between the first and second electrodes, an electrical discharge occurs between the first and second electrodes through the small holes of the insulating films, and whereby when the low-melting point metal plate is fused by heat of the arrester body, the fused metal will flow through the openings to electrically connect the leaf spring to the first electrode.
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