Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With coupling means
Patent
1984-01-12
1986-10-07
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With coupling means
174 35R, 336 82, 336 84C, G01R 120, H01F 1504
Patent
active
046161767
ABSTRACT:
The current transducer is of the type comprising a Rogowski coil extending around a first conducting element in which a current to be detected flows. The first conducting element is provided at one end with a first terminal connector. A second conducting element is mounted on the first one so as to cover and preferably embed the external periphery of the coil. The second conducting element is electrically connected to the first conducting element at the end thereof which is opposite to the one end provided with the first terminal connector. A second terminal connector is provided on the second conducting element on the same side of the plane of the coil as the first terminal connector. This arrangement forces the current flowing between the first and second terminal connectors via the first and second conducting elements to flow around the periphery of the coil and thus to shield the coil.
REFERENCES:
patent: 1213174 (1917-01-01), Faszler
patent: 1278234 (1918-09-01), Sessions
patent: 1478262 (1923-12-01), Snodgrass et al.
patent: 4070572 (1978-01-01), Summerhayes
patent: 4374359 (1983-02-01), Missout
Lebeda et al, "Bobines de Rogowski Pour la Mesure Precise due Courant" pp. 387-389.
IEEE, "Transient Response of Current Transformers" Power Systems Relaying Committee of the IEEE Power Engineering Society, pp. 1-12, (Jan., 1976).
Hortopan et al, "Etude, Realisation et Performances de Shunts Coaxiaux Pour la Mesure Precise de Courants de Courts-Circuits Eleves" pp. 332-343.
Pearson Electronics, Inc., "Application Notes for Current Transformers Manufactured by Pearson Electronics, Inc." pp. 1-7.
Beaudet et al, "Technique, Applicable to Circuit Breakers, for the Measurement of the Spatial Distribution . . . " pp. 1054-1062.
Pellinen et al, "Rogowski Coil for Measuring Fast, High-Level Pulsed Currents" Rev. Sci. Instrum. 51(11), Nov. 1980, pp. 1535-1540.
M. Murano et al, "Current Zero Measurement for Circuit Breaking Phenomena" IEEE, pp. 1-8.
Drouet Michel G.
Mercure Hubert P.
Hydro - Quebec
Karlsen Ernest F.
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