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US 2011/0032646 A1Published application
Methods and apparatus to manage ground fault conditions with a single coil
AssigneeTexas Instruments Incorporated
InventorsArtur J. Lewinski, Ross Teggatz, Thomas Edward Cosby
Life of this patent
Estimating the term…
Abstract
A ground fault detection device includes a sense coil including a primary winding and a secondary winding to detect current in a line conductor and a neutral conductor. It also includes a capacitor in parallel with the secondary winding and a virtual inductor to form a resonance circuit having a signal proportional to the current and being indicative of a ground fault condition
Claims15
A method of detecting a ground fault comprising:
- driving a first capacitor with an inductor to generate a resonance signal component;
- monitoring an inductor signal to determine at least one of a neutral-to-ground fault, a line-to-ground fault, or a non-fault condition;
- and
- generating a fault signal when at least one of the line-to-ground fault or the neutral-to-ground fault is detected.
1 more element
An article of manufacture storing machine accessible instructions which, when executed, cause a machine to:
- drive a first capacitor with an inductor to generate a resonance signal component;
- monitor an inductor signal to determine at least one of a neutral-to-ground fault, a line-to-ground fault, or a non-fault condition;
- and
- generate a fault signal when at least one of the line-to-ground fault or the neutral-to-ground fault is detected.
1 more element
Dependencies are inferred from the claim text.