An AC Current Transformer Standard Measuring System for Power Frequencies

被引：29

作者：

Mohns, Enrico ^{[1
]}

Roeissle, Gunter ^{[1
]}

Fricke, Soeren ^{[1
]}

Pauling, Florian ^{[1
]}

机构：

[1] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2017年 / 66卷 / 06期

关键词：

Bridge; current comparator (CC); current transformer (CT); phase displacement; ratio error; voltage ratio;

D O I：

10.1109/TIM.2017.2648918

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper describes the design and setup of the new ac current transformer (CT) calibration system at Physikalisch-Technische Bundesanstalt, which uses enhanced, actively compensated current comparators (CCs) for rated primary currents from 5 A up to 60 kA, and a new CT bridge based on the differential method. The bridge makes use of modern, high-resolution analogto-digital converters, and makes it possible to connect traditional CTs as well as two-stage CTs with rated secondary currents from 100 mA to 5 A. The lower current ranges are integrated to enable a calibration of CTs of the highest available precision for national power standards. The current transducers and the two-channel sampling system of the bridge allow a resolution of approximately 10(-9), while the estimated Type B uncertainty of the bridge is around 10(-8).

引用

页码：1433 / 1440

页数：8