The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2017
Filed:
Aug. 11, 2015
Intermountain Electronics, Inc., Price, UT (US);
Dale Curtis, Castle Dale, UT (US);
INTERMOUNTAIN ELECTRONICS, INC., Price, UT (US);
Abstract
An apparatus includes a signal generation module that injects a signal in a pilot conductor. The signal includes two or more AC components. Current in the pilot conductor is injected in a grounding conductor of power cables connecting a power source to a load, and the grounding conductor is connected to a ground return. A current monitor module monitors current in the pilot conductor or ground return, an AC detection module determines an AC current corresponding to each of the two or more AC components present in the monitored current, and an AC threshold module determines if one or more of the AC currents is below an AC threshold. A trip module opens a contact in response to determining that at least one of the AC currents is below an AC threshold for longer than an AC current time threshold. The contact disconnects the power source from the power cables.