Ground fault circuit interrupter and method
First Claim
1. A method for determining an operating condition of a sub-module within a ground fault circuit indicator module, comprising:
- generating a current in a device;
measuring a rate at which a mains voltage level decreases in response to the current generated in the device; and
generating an operating condition signal in accordance with the rate at which the mains voltage level decreases.
7 Assignments
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Accused Products
Abstract
A method and circuit for determining a circuit element parameter in a ground fault circuit interrupter circuit. An electrical signal provided to a first node is used to generate another electrical signal at a second node. The electrical signal at the second node is multiplexed with a modulation signal to generate a modulated signal that is then filtered and converted into a digital representation of a portion of the circuit element parameter. The electrical signal at the second node is multiplexed with the modulation signal after it has been phase shifted to produce a modulated signal that is filter and converted into a digital representation of another portion of the circuit element parameter. In another aspect, a slope based solenoid self-test method is used for self-testing in a GFCI circuit. Alternatively, a method for determining a wiring fault is provided using a digital filter.
32 Citations
7 Claims
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1. A method for determining an operating condition of a sub-module within a ground fault circuit indicator module, comprising:
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generating a current in a device; measuring a rate at which a mains voltage level decreases in response to the current generated in the device; and generating an operating condition signal in accordance with the rate at which the mains voltage level decreases. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification