SELF-TESTING CIRCUIT INTERRUPTING DEVICE
First Claim
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1. A circuit interrupting device comprising:
- a first electrical conductive path having two or more conductors capable of being electrically connected to a source of electricity;
a second electrical conductive path having two or more conductors capable of conducting current to a load when electrical continuity between said first and second electrical conductive paths is made;
a fault detector coupled to monitor voltage and/or current in the first and/or second electrical conductive paths and produce a fault signal when a fault is detected;
a first relay interposed between said first and second conductive paths; and
a second relay interposed between said first and second conductive paths having its current carrying path coupled in parallel with the current carrying path of said first relay.
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Abstract
There is disclosed a self-testing circuit interrupting device which provides uninterrupted power to a load during a complete electronic and electromechanical components self test to allow autonomous periodic automated self testing without damaging or resetting connected load equipment.
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Citations
48 Claims
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1. A circuit interrupting device comprising:
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a first electrical conductive path having two or more conductors capable of being electrically connected to a source of electricity;
a second electrical conductive path having two or more conductors capable of conducting current to a load when electrical continuity between said first and second electrical conductive paths is made;
a fault detector coupled to monitor voltage and/or current in the first and/or second electrical conductive paths and produce a fault signal when a fault is detected;
a first relay interposed between said first and second conductive paths; and
a second relay interposed between said first and second conductive paths having its current carrying path coupled in parallel with the current carrying path of said first relay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A circuit interrupting device comprising:
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a first electrical conductive path having two or more conductors capable of being electrically connected to a source of electricity;
a second electrical conductive path having two or more conductors capable of conducting current to a load when electrical continuity between said first and second electrical conductive paths is made;
a fault detector coupled to monitor voltage and/or current in the first and/or second electrical conductive paths and produce a fault signal when a fault is detected; and
a relay interposed between said first and second conductive paths, having a first and a second conducting position and a center off position, said first and second conducting positions having their current carrying paths coupled in parallel. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A circuit interrupting device comprising:
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a first electrical conductive path having two or more conductors capable of being electrically connected to a source of electricity;
a second electrical conductive path having two or more conductors capable of conducting current to a load when electrical continuity between said first and second electrical conductive paths is made;
a fault detector coupled to monitor voltage and/or current in the first and/or second electrical conductive paths and produce a fault signal when a fault is detected; and
a relay interposed between said first and second conductive paths, having a first conducting position and a second non-conducting position;
wherein, to test the operation of said relay said relay is caused to move briefly from said first conducting position to said second non-conducting position and immediately back to said first conducting position. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification