| 摘要 |
<p>A hybrid circuit breaker is formed with a vacuum interrupter (SR), a breaking resistor (R) connected in parallel to the vacuum interrupter (SR), an SF6 gas interrupter (SX) connected in series to the breaking resistor (R) and a spring mechanism (16) for actuating the vacuum interrupter (SR) so that a circuit current (io) to be interrupted is commutated to the breaking resistor (R). A plurality of the above hybrid circuit breakers are connected in series in an EHV/UHV electric power system. The spring mechanism (16) is provided exclusively for the commutation action of the vacuum interrupter (SR). The output power from a breaker driver (100) is fully used to circuit-open the gas interrupter (SX), thereby shortening the maximum current feeding period (TQ) of the breaking resistor (R).</p> |
