High-voltage gas-blast circuit-breaker
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United States of America Patent
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Sep 15, 1998
Grant Date -
N/A
app pub date -
Jul 22, 1997
filing date -
Jul 23, 1996
priority date (Note) -
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Abstract
A gas-blast gas-insulated high-voltage circuit-breaker comprises a fixed main contact, a fixed arc contact and a mobile assembly comprising a main contact, an arc contact and a compression volume cooperating with a fixed piston and communicating with a blast volume leading to a blast nozzle. The compression volume is provided with a valve preventing the gas passing from the blast volume to the compression volume. The piston comprises openings for evacuating the gas from the compression volume during tripping, these openings being closed between the start of compression of the compression volume and the closure of the valve and open upon closure of the valve.
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