摘要 |
In a magneto-optic method of measuring an a.c. current in a conductor, the plane of rotation of linearly polarized light is rotated through a measuring angle in a Faraday element surrounding the conductor, the angle being a measure of the current strength. This light is divided into two linearly polarized light signals, with polarization planes directed at right angles to each other, which are converted by opto-electro converters into corresponding electrical signals. The two signals are used to form a functional value that represents the temperature. This value is used, together with the first signal, to determine a temperature-compensated measuring signal for the a.c. current.
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