In this paper, new traceable measurement systems for automatic calibration of high current sources have been established at the National Institute of Standards (NIS), Egypt. These systems can be used in laboratories mainly depending on calibrators with current coils, in case of unavailability of current transformers. Traceability of high current has been achieved to the primary standards of low voltages. NIS primary standards of DC and AC low voltages were used to realize the traceability to the International System of Units (SI) for DC and AC high currents up to 1000 A at 50 Hz. A traceable AC/DC clamp probe with calibrated nominal ratio of 1 mV/A has been used in the calibration system to realize high currents in terms of low voltages. Measurements have been automatically performed and controlled using the Laboratory Virtual Instrument Engineering Workbench (LabVIEW). Evaluations of results are presented and discussed. Normalized error (E_n) statistical method as well as error bar graphical representations are presented to prove that the new measurement systems are reliable and dependable for high current measurements.

在本文中，埃及国家标准研究院 (NIS) 建立了用于自动校准高电流源的新型可追溯测量系统。在没有电流互感器的情况下，这些系统可用于实验室，主要取决于带有电流线圈的校准器。高电流的可追溯性已达到低电压的主要标准。直流和交流低压的 NIS 主要标准用于实现对高达 1000 A 在 50 Hz 的直流和交流大电流的国际单位制 (SI) 的可追溯性。校准系统中使用了校准标称比为 1 mV/A 的可追踪 AC/DC 钳形探头，以实现低电压下的高电流。使用实验室虚拟仪器工程工作台 (LabVIEW) 自动执行和控制测量。对结果的评估进行了介绍和讨论。归一化误差（E _n ) 统计方法以及误差条图形表示，以证明新的测量系统对于大电流测量是可靠和可靠的。