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:
Jul. 05, 2016
Filed:
Oct. 01, 2013
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Lixiang Wei, Whitefish Bay, WI (US);
Jiangang Hu, Grafton, WI (US);
Jeffrey D. McGuire, Franklin, WI (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
A HRG ground fault detector and method for detecting a ground fault in a High Resistance Ground (HRG) system are provided. The HRG ground fault detector in one example embodiment includes a first input A coupled to a first phase PHof the HRG system, a second input B coupled to a second phase PH, and a third input C coupled to a third phase PH, with the HRG ground fault detector generating a simulated neutral voltage Vfrom the first phase PH, the second phase PH, and the third phase PH. The simulated neutral voltage Vhas a zero voltage potential when the first phase PH, the second phase PH, and the third phase PHare equal. The HRG ground fault detector further compares the simulated neutral voltage Vto a predetermined fault voltage threshold, and detects a HRG ground fault if the simulated neutral voltage Vexceeds the threshold.