| 摘要 |
A gas blast interrupter has two hollow contact assemblies enclosed in a housing which can be filled with compressed air. A main exhaust valve, when opened, discharges compressed air from the interior of one contact assembly and thereby brings about separation of its contact making part from the contact making part of the second contact assembly. A further exhaust valve, when opened, discharges compressed air from the housing through the second contact assembly. The interrupter has a control valve having a first operative position in which compressed air is utilized to bring about the sequential opening of the main exhaust valve and the further exhaust valve and to close those valves after their contact making parts have separated, and having a second operative position in which compressed air is utilized to cause the contact making parts to engage and the contact assemblies and the housing to be filled with compressed air.
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