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:
May. 27, 2025
Filed:
Mar. 02, 2023
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Jeremy William Blair, Jackson, MS (US);
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Abstract
Methods and devices are provided for determining whether a phase is faulted or one or more phases are open in capacitor bank system. Detecting open and faulted phases may include determining a neutral current of the capacitor bank system. An open-phase event and a fault event may be distinguished based on a magnitude of a neutral current within a first or a second predetermined range. According to one embodiment, an IED may calculate an aggregate power phasor for the phases of the capacitor bank system with respect to each rotation. According to another detection method, in response to the magnitude of the neutral current being greater than a threshold value, an IED may calculate an individual power phasor for each of the phases of the capacitor bank system with respect to each rotation. Based on the angles of the power phases, the IED may determine which phases may be faulted.