介绍了普通反时限特性，并提供了缺乏反时限特性段或电压互感器断线时的电流、时间整定原则。

The general inverse time characteristic is introduced, and the setting principles of current and time when inverse time characteristic is scarce or voltage transformer breaks are provided.

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提出了一种利用标准化死区时间整定PID参数的新方法，并利用曲线拟合最小二乘法求得控制器的整定公式。

A new method tuning the PID parameters is presented by the normalized dead time of process. The tuning formulae are obtained from the curve fitting in the least-squares sense.

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该断路器通过拨码开关完成整定电流、脱扣时间、瞬动倍数等参数的设定。

Through dial switches the circuit breaker can set rated current, tripping time, instantaneous multiple and so on.

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