| 摘要 |
The present invention teaches an overvoltage protection device that includes at least one non-linear resistance element and a single cut-off device coupled with the at least one non-linear resistance element to disable the at least one non-linear resistance element when the at least one non-linear resistance element reaches a pre-determined temperature. The single cut-off device may include stranded wire, a first solder having a first melting point connecting the stranded wire to the at least one non-linear resistance element, and a second solder having a second melting point, higher than the first melting point, connecting the stranded wire to the at least one non-linear resistance element. The single cut-off device may further include a shifting part that shifts when the at least one non-linear resistance element heats the first solder to the first melting point. In other particular embodiments, the overvoltage protection device may further include a status indicator configured to be moved by the single cut-off device to indicate one of at least two conditions of the at least one non-linear resistance element. The status indicator may include a lever, and the single cut-off device moves the lever to indicate the one of at least two conditions of the at least one non-linear resistance element.
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