Ground Monitor
AssigneeLear Corporation
InventorsDavid A. Hein, Aftab Ali Khan
Life of this patent
Estimating the term…
Abstract
A ground monitor is disclosed. The ground monitor may be configured to conduct a ground continuity test based on a determined ground resistance. The ground monitor may be operable to determine the ground resistance as a function of a voltage differential detected during application of a test current.
Claims9
1-9. (canceled)
A ground monitor being operably coupled to a three-pronged outlet having a hot plug, a neutral plug, and a ground plug of an AC power network to detect a ground resistance of the network based on a voltage differential between the neutral plug and the ground plug of the outlet, the ground monitor comprising:
- a signal generator operable to apply a test current to the neutral plug at a first frequency, wherein the hot plug of the outlet receives a current flowing therethrough at a second frequency and the first frequency is different from the second frequency;
- a filter being operable to remove signals having the second frequency and to output a filtered signal;
- and
- a voltage sensor operable to measure a voltage differential between the neutral and ground plugs based on the filtered signal, the voltage differential representing the ground resistance during application of the test current.
17-20. (canceled)
Dependencies are inferred from the claim text.