Detection of unbalanced power feed conditions
First Claim
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1. A method of detecting unbalanced currents in power feeder conductors comprising the steps of:
- clamping a Hall effect device around a pair of balanced feeder conductors;
connecting an output of said Hall effect device to an alarm controller.
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Abstract
This invention relates to a method and apparatus for detecting and alarming unbalanced power feed conditions. A Hall effect device is clamped around a pair of power feed conductors. If the currents in the two power feeder conductors are unequal, i.e., unbalanced, this indicates a trouble condition and is alarmed. Advantageously, Hall effect devices are inexpensive and sensitive. Advantageously, this provides a continuous, inexpensive and sensitive arrangement for detecting unbalanced currents in a feeder pair during and after installation of a system.
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12 Claims
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1. A method of detecting unbalanced currents in power feeder conductors comprising the steps of:
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clamping a Hall effect device around a pair of balanced feeder conductors;
connecting an output of said Hall effect device to an alarm controller. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Apparatus for detecting unbalanced currents in power feeder conductors comprising:
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a Hall effect device clamped around a pair of balanced feeder conductors; and
an output of said Hall effect device connected to an alarm controller. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification