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    • 5. 发明授权
    • Method and apparatus for comparing load current in an electrical circuit
with the capacity of its supply source
    • 将电路中的负载电流与其电源的容量进行比较的方法和装置
    • US5644238A
    • 1997-07-01
    • US472437
    • 1995-06-07
    • Gregory J. SeifertPeter G. Seifert
    • Gregory J. SeifertPeter G. Seifert
    • G01R1/40G01R19/30G01R31/02G01R31/327
    • G01R19/30G01R1/40
    • A method and apparatus for measuring and recording peak RMS electrical current over multiple moving-average time periods provides current-flow information in the same units used to characterize electrical system distribution components--primarily overcurrent protective devices such as fuses and circuit breakers. Rather than reporting current-flow information based on a series of brief observations of a few line cycles or seconds, short duration RMS current-flow information in multiple geometrically increasing time intervals is calculated and accumulated to form longer duration RMS values of current. The resulting set of peak RMS current-flow values properly characterizes both the long and short term heating effects of the electrical current in the circuit under inspection, and is used in direct side-by-side comparisons with manufacturer provided data for specific distribution components in the evaluation of usage versus capacity and other functions relevant to distribution system design.
    • 用于在多个移动平均时间周期内测量和记录峰值RMS电流的方法和装置在用于表征电气系统分布组件的相同单元中提供电流信息,主要是过电流保护装置,例如保险丝和断路器。 基于几行循环或秒的一系列简短的观察结果报告电流信息而不是计算并累积多个几何增长时间间隔内的短持续时间RMS电流信息,以形成电流的较长持续时间RMS值。 所得到的峰值RMS电流流量值正好表征了在检查电路中的电流的长期和短期加热效应,并且与制造商直接并行比较用于特定分配组件的数据 与配电系统设计相关的使用与容量等功能的评估。