COMPACT WIDEBAND HIGH-CURRENT (>= 1000 A) MULTISTAGE CURRENT TRANSFORMERS FOR PRECISE MEASUREMENTS OF CURRENT HARMONICS

摘要

An overview of the development and performance of special compact and lightweight wideband high-current multistage current transformers for precise measurements of current harmonics at the National Research Council of Canada (NRC) is described. These include current transformers with ratios of 1000 A/5 A and higher, with ratio errors of less than 5 X 10~(-6) in both magnitude and phase with burdens up to 0.5 OMEGA and at frequencies up to 5 kHz.