Differential arc fault detection
First Claim
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1. An apparatus for detecting arc faults, said apparatus comprising:
- a master node for digitally detecting a current signal and a voltage signal at a first point in a wiring system;
a slave node for digitally detecting a current signal and a voltage signal at a second point in said wiring system; and
a detection unit for detecting an arc fault in said wiring system by comparing said current signals from said master node and from said slave node, and comparing said voltage signals from said master node and from said slave node.
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Abstract
A method and apparatuses detect arc faults. The apparatus according to one embodiment comprises: a master node (111) for digitally detecting a current signal and a voltage signal at a first point in a wiring system (131); a slave node (122) for digitally detecting a current signal and a voltage signal at a second point in the wiring system (131); and a detection unit for detecting an arc fault in the wiring system (131) by comparing the current signals from the master node (111) and from the slave node (122), and comparing the voltage signals from the master node (111) and from the slave node (122).
40 Citations
20 Claims
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1. An apparatus for detecting arc faults, said apparatus comprising:
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a master node for digitally detecting a current signal and a voltage signal at a first point in a wiring system; a slave node for digitally detecting a current signal and a voltage signal at a second point in said wiring system; and a detection unit for detecting an arc fault in said wiring system by comparing said current signals from said master node and from said slave node, and comparing said voltage signals from said master node and from said slave node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for detecting arc faults, said apparatus comprising:
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a master node for detecting a current signal and a voltage signal at a first point in a wiring system; a slave node for detecting a current signal and a voltage signal at a second point in said wiring system, wherein an arc fault is detected in said wiring system by comparing said current signals from said master node and from said slave node, and comparing said voltage signals from said master node and from said slave node; and a communication pathway for data and timing communication between said master node and said slave node. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of detecting arc faults, said method comprising:
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detecting a current signal and a voltage signal at a first point in a wiring system; detecting a current signal and a voltage signal at a second point in said wiring system; detecting an arc fault in said wiring system by comparing said current signals at said first and second points, and comparing said voltage signals at said first and second points; and communicating data and timing information between said first point and said second point. - View Dependent Claims (18, 19, 20)
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Specification