| 摘要 |
<p>The interrupting chamber comprises two arcing contacts (1) and (3) separating from each other on opening of the circuit breaker and subsequent to prior separation of the main contacts (2, 4). The interrupting chamber further comprises a blast nozzle (5) having a generally cylindrical shape and including a neck (12) and defining a volume of revolution including an upstream portion and a downstream portion (14). The downstream portion of the blast nozzle includes a single conical portion. The arcing contact (3), situated downstream from the neck of the nozzle in the direction of the gas flow, is hollow. The length of the neck of the blast nozzle is sufficient for the arcing contact (3) to remain in contact with the neck (12) while the blast nozzle (5) is moving during opening of the circuit breaker.</p> |
