Fault detection using phase comparison
First Claim
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1. A system for indicating a fault on an electric power distribution system, comprising:
- a first detection device in electrical communication with a phase conductor, adapted to obtain a first current signal therefrom, and including;
a first current signal modulator for modulating the first current signal; and
a transmit module for communicating the first modulated current signal to a second monitoring device;
a second detection device in electrical communication with the phase conductor at a different location, adapted to obtain a second current signal therefrom, and including;
a second current signal modulator for modulating the second current signal;
a receive module for receiving the first modulated current signal; and
a compare module for comparing the first modulated current signal and the second current signal and determining whether the first current signal is in phase with the second current signal.
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Abstract
A system for communicating information between a detection device and a wireless device is provided. The system generally includes a detection device adapted to monitor a condition related to a power system. A radio interface unit is in communication with the detection device via a communication member. A wireless device is further provided which is in radio communication with the radio interface unit such that the detection device communicates information to the wireless device through a radio interface unit. The system'"'"'s components are further adapted to endure harsh conditions (e.g., prolonged exposure to water).
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Citations
27 Claims
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1. A system for indicating a fault on an electric power distribution system, comprising:
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a first detection device in electrical communication with a phase conductor, adapted to obtain a first current signal therefrom, and including; a first current signal modulator for modulating the first current signal; and a transmit module for communicating the first modulated current signal to a second monitoring device; a second detection device in electrical communication with the phase conductor at a different location, adapted to obtain a second current signal therefrom, and including; a second current signal modulator for modulating the second current signal; a receive module for receiving the first modulated current signal; and a compare module for comparing the first modulated current signal and the second current signal and determining whether the first current signal is in phase with the second current signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for communicating information between a detection device and a wireless device, comprising:
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a detection device adapted to measure a current signal from an electrical conductor and compare the current signal with another current signal received from another detection device, said detection device further adapted to determine whether the current signal is in phase with the other current signal; a communication member coupled to the detection device, a radio interface unit in communication with said communication member, and a wireless device in radio communication with said radio interface unit, such that said detection device communicates information between the wireless device via the radio interface unit. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification