| 摘要 |
A surge voltage arrester, such as a lightning arrester, is provided with a sparkgap assembly having a plurality of matched pairs of arc-confining chambers that are operable to regulate movement of arcs formed within the chambers of the assembly to prevent the assembly from developing undesirably high peak voltages when a surge voltage is discharged through it, and also to maintain the arc-quenching voltage rating of the assembly at a substantially constant value following repeated surge current discharges. A narrow passageway is provided between each of the matched pairs of arc-confining chambers in order to allow small-current arcs to move between the two chambers while confining large-current arcs to a single one of the chambers, thus, one of the chambers is protected from exposure to destructive erosion and contamination by large-current arcs.
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