G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 15/24 (2006.01) G01R 15/07 (1990.01)
Patent
CA 2128735
2128735 9315410 PCTABS00024 A device (10) for sensing electrical current in a conductor (11) utilises a material (22) exhibiting the Faraday magneto-optic effect as the sensitive element. The material (22) is located between two polarisers (23, 24) to receive via a graded index collimator lens (25) an optical signal from a source (18) and to deliver via a graded index collimator lens (26) an optical signal to a detector (20). The optical signals are guided by multi mode optical fibres (14, 16). The change in rotation of the polarisation is a measure of the electrical current in the conductor (11). Errors in the measure may arise due to the effects of temperature, vibration or cross-talk and specific arrangements for compensating against these errors are disclosed both individually and cumulatively.
Allan Kenneth
Andonovic Ivan
Cruden Andrew John
Mcdonald James Rufus
Porrelli Raymond Andonovic
Instrument Transformers Limited
Sim & Mcburney
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