系统的工作电压应不大于系统额定电压的1.5倍。
Not be more than the rated voltage of the system by 1.5 times.
基于误差分析理论，提出校验通道的误差应不大于被试通道误差限的五分之一。
Based on error analysis theory, it is deduced that the error of calibrating channel should be no more than one fifth of the tested channel error limitation.
当电缆使用地直流系统时，该系统的额定电压应不大于电缆额定电压的1.5倍。
When the cables use in direct current system, rated voltage should be not greater than 1.5 times of the rated voltage of the cables.
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