A wide-band active current transformer and shunt

Author

Tong, Guang-qiu ; Xu, Xiu-ye

Author_Institution

Nat. Inst. of Stand. & Technol, Gaithersburg, MD, USA

Volume

40

Issue

6

fYear

1991

fDate

12/1/1991 12:00:00 AM

Firstpage

908

Lastpage

912

Abstract

An active current transformer and shunt with high accuracy and wide frequency range is described. The transformer, which uses two three-stage core transformers with two two-stage feedback amplifiers, can be used in the audio frequency band. It has a wide range of current ratio (0.01-1) and can dissipate 10 W in the external burden. If the external burden of the transformer is an AC standard resistor, it becomes an AC current to voltage transducer that can be used in many electrical measurements. The relative uncertainty (3σ) in the current ratio of the new transformer is between (1+j1) p.p.m. to (8+j8) p.p.m. over the frequency range from 40 Hz to 10 kHz

Keywords

current transformers; instrument transformers; transducers; 40 Hz to 10 kHz; AC current to voltage transducer; audio frequency; current ratio; electrical measurements; low frequency error; shunt; three-stage core transformers; two-stage feedback amplifiers; wide-band active current transformer; Current measurement; Current transformers; Electric variables measurement; Feedback amplifiers; Frequency; Measurement standards; Resistors; Transducers; Transformer cores; Wideband;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.119766

Filename

119766