| 摘要 |
Electrical switchgear, such as a circuit breaker, must in general provide good dielectric strength in open position in order to avoid discharge. To improve the dielectric strength capacitors are often arranged in parallel between the contacts of the switchgear. For very high voltage applications, for example >500 kV, two circuit breaker are connected in series for switching such high voltages, i.e. the total voltage to be switched needs to be shared equally by the two switches. Because of the required capacitance the capacitor and hence also the switchgear is large, especially of great diameter, and costly. The novel device provides for shields arranged in order to form additional capacitors C 1 '', C 1 ''' and C<SUB>2 </SUB>between the shields and between a connector, connecting the two switches, and the enclosure. The resulting switchgear 1 has increased dielectric strength and the total voltage is substantially equally shared by the two switches in series.
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