The permanent magnet actuator, as the new operation system of vacuum circuit breakers, is the key to the transformation from mechanical actuation to electronic actuation.

永磁操动机构是新一代真空断路器的操作系统，是由机械操动向电子操动转变的关键。

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The appendix published is the one to the 3rd edition, it is the newest standard with its contents stressed on the additional tests for circuit breakers with electronic over-current protection.

该附录经过3次修订，现刊出的为第三版中的附录，是最新标准。其内容着重带电子过电流保护断路器的附加试验要求。

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These circuit breakers should be placed on the orders coming into the markets from each electronic trader, not on the markets themselves.

FORBES: After the Knight Capital Catastrophe, Throttle the Traders, Not the Markets