This article shows the design of a simple construction two-stage current transformer with ratios from 5 A:5 A to 2000 A:5 A. It can be self-calibrated. Primary windings are separated into sectors to allow series–parallel configurations. Beginning with 5 A:5 A-ratio self-calibration, the higher ranges relate their errors to this first one, considering parasitic effects. Stray capacitances are considered as the major source of error when changing the configuration of the primary winding. New methods to calculate and compensate them are proposed, and electronic devices are used to reduce ratio error and phase displacement to few $\mu \text{A}$ /A and $\mu $ rad. The participation of this transformer as the UTE standard in an international comparison confirmed the calculated performance.

中文翻译：

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具有杂散电容控制的高精度自校准电流互感器

本文展示了变比从 5 A:5 A 到 2000 A:5 A 的简单结构两级电流互感器的设计。它可以进行自校准。初级绕组被分成扇形以允许串并联配置。从 5 A:5 A 比率自校准开始，考虑到寄生效应，较高的范围将它们的误差与第一个相关联。在改变初级绕组的配置时，杂散电容被认为是主要的误差来源。提出了计算和补偿它们的新方法，并使用电子设备将比率误差和相位位移减少到很少 $\mu \text{A}$ /A 和 $\亩 $ 弧度 该变压器作为 UTE 标准参与国际比较证实了计算性能。