Device for measuring the alternating current flowing in a...

Details Device for measuring the alternating current flowing in a... Device for measuring the alternating current flowing in a...

G - Physics

01

R

324/29

G01R 15/22 (2006.01)

Patent

CA 1069977

ABSTRACT OF THE DISCLOSURE Shunt means supply a diode bridge with an alternating cur- rent proportional to the AC to be measured. The bridge has at least two electroluminescent diodes which emit two al- ternating streams of half-wave light pulses which are supplied to two fibre optic systems. These convey the light signals to a safe distance from the high tension line where two light receptors receive the respective streams of half- wave light pulses and apply electrical signals proportional thereto to opposite inputs of a differential amplifier. The output of the amplifier is a readily measurable AC. Balanc- ing means may be provided to compensate for any differences in the overall transmission paths for the two half-wave pulse streams. A resistive load may be provided adjacent the line to sink the current flowing through the diode bridge.

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