Residual current monitor

US12360176B2 · kind B2 · utility

Assignee

• Legrand DPC, LLC · US

Inventors

• Swen Anderson · Burgstädt, DE
• William H. Avery, Jr. · Reno, US
• Thomas Hsueh · Taipei, TW
• Thomas Lauer · Cleveland, US
• Alex Lee · Mountain View, US
• Stefan Oebser · Zwickau, DE
• Michael Suchoff · Chapel Hill, US

Key dates

• Filing date: Sep 13, 2023
• Grant date: Jul 15, 2025
• Expiry date: Sep 13, 2043

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01R13/6683
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Disclosed are power distribution systems and methods in which a power distribution unit (PDU) includes a residual current monitor (RCM) to detect the presence of downstream leakage current in the PDU. The RCM can include a current sensor with a core that has power conductors passing through the core and drive windings about the core. Drive circuitry of the RCM produce alternating drive signals through the drive windings to drive the core into and out of positive and negative saturation. Sensing circuitry of the RCM produce a response signal that is filtered by a high-order current signal filter to isolate characteristics of the downstream leakage current.