Measurement of the current flow in an electric power transmissio

Details Measurement of the current flow in an electric power transmissio Measurement of the current flow in an electric power transmissio

1983-10-03

1986-04-22

Levy, Stewart J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

324105, 324106, G01R 3100

Patent

active

045845239

ABSTRACT:
Passage of current through a power transmission line causes infrared radiation therefrom. The construction of a high-tension (HT) line with counterwound helical conductors for current around a supporting core minimizes the surrounding magnetic field, reducing the skin resistance of the line per unit length as compared to its bulk resistance per unit length. Infrared radiation from the I.sup.2 R losses in the line is thus linearized, and the current in the line can be indirectly measured by sensing the infrared radiation from the line itself using infrared detectors.

REFERENCES:
patent: 3312895 (1967-04-01), Garbuny
patent: 3411069 (1968-11-01), Kubler et al.
Leslie, J. et al., "Detection of Overhead Transmission Line Joints by Means of a Bolometer", AIEE Technical Paper 49-9, Dec. 1948.
Davis, M., "A New Thermal Rating Approach . . . ", IEEE Transactions on Power Apparatus and Systems, vol. PAS 96, No. 3, May/Jun. 1977, pp. 803-809.
Vanzetti, R., "Infrared Radiation: A New Dimension for Production Reliability and Maintainability", Reliability and Maintainability Conference, Washington, D.C., May 1963, pp. 239-251.
Klass, P., "Use of Infrared Testing Technique Grows", Aviation Week & Space Technology, May 4, 1964, pp. 82-90.
S. Isawa, D. Lamb and D. Paffel of Honeywell, "Mosaic CCD Multiplexer for Pyroelectric Hybrid Focal Plane", paper presented in Sep. 1979 at the University of Edinburgh, pp. 33-39.

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