| 摘要 |
An electrical switch arrangement as illustrated in Fig. 1 and Fig. 9, comprising a first, series, mechanical switch (4), a second, parallel, mechanical switch (6), and a PTC device (2), with the PTC device and second switch connected in parallel and the parallel combination connected in series with the first switch, or the PTC device and first switch connected in series and the series combination connected in parallel with the second switch. The arrangement can interrupt a current and voltage higher than the rated currents and voltages of each of the switches and the PTC devices. The parallel switch can be rated to interrupt the rated interrupt current of the electrical switch arrangement at a voltage below the rated voltage of the electrical switch arrangement, and the series switch can be rated to interrupt a current below the rated interrupt current of the electrical switch arrangement at the rated voltage of the electrical switch arrangement.
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