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Improvement of frequency response for a zero-flux current measuring system
RISE, SP – Sveriges Tekniska Forskningsinstitut.
RISE, SP – Sveriges Tekniska Forskningsinstitut.
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2014 (English)In: CPEM Digest (Conference on Precision Electromagnetic Measurements), 2014, p. 618-619Conference paper, Published paper (Refereed)
Abstract [en]

Magnetic zero-flux current transformers are widely utilized to measure AC and DC electrical currents. To improve the AC characteristics between 10 Hz and 100 kHz, a method is proposed to evaluate adjustments in the circuitry; increase of the amplification in the AC feed-back circuit and introduction of an external coaxial read-out shunt resistor. The method is generally applicable and includes a coaxial current path within the entire reference system and traceability to national standards. The AC working range is extended from about 1 kHz to about 3 kHz. Outside the nominal AC working range, the scale factor variation is reduced from 45 % to 3.5% and the phase angle error offset changes from ca 5.8 μs to below 0.3 μs. © 2014 IEEE.

Place, publisher, year, edition, pages
2014. p. 618-619
Keywords [en]
AC current, current transformer, frequency response, measurement technique, traceability, zero-flux, AC currents, Measurement techniques, Measuring systems, Electric instrument transformers
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:ri:diva-32457DOI: 10.1109/CPEM.2014.6898537Scopus ID: 2-s2.0-84907895873ISBN: 9781479952052 OAI: oai:DiVA.org:ri-32457DiVA, id: diva2:1154720
Conference
29th Conference on Precision Electromagnetic Measurements, CPEM 2014, 24 August 2014 through 29 August 2014
Available from: 2017-11-03 Created: 2017-11-03 Last updated: 2017-11-03Bibliographically approved

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