The Current Comparator and Its Application to the Absolute Calibration of Current Transformers
- 1 April 1961
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems
- Vol. 80 (3) , 94-103
- https://doi.org/10.1109/AIEEPAS.1961.4500986
Abstract
The current comparator is a passive magnetic current-ratio device of exceptionally high inherent stability and proportionately high sensitivity. Methods are presented for calibration of such devices to an accuracy of 0.1 ppm (part per million). The design and construction of a multiratio comparator, which covers various ratios from 1 to 1 to 12 to 1, and which has errors of less than 1 ppm, is given. The use of the comparator, whose error is independent of current magnitude, for the absolute calibration of current transformers is described, and its extension to frequencies higher than the usual power frequencies discussed.Keywords
This publication has 2 references indexed in Scilit:
- The Calibration of Current Transformers by Means of Mutual InductancesTransactions of the American Institute of Electrical Engineers, 1915
- Eine einfache Methode zur Prüfung von StromwandlernElectrical Engineering, 1914