Method for insulation fault monitoring with dynamic response characteristic

US9164140B2 · kind B2 · utility

Assignee

• Bender GmbH & Co. KG · DE

Inventors

• Winfried Moell · Laubach, DE
• Karl Schepp · Kreuztal, DE
• Carsten Wiess · Laubach, DE

Key dates

• Filing date: Sep 26, 2012
• Grant date: Oct 20, 2015
• Expiry date: Oct 16, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R35/005
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and device for insulation fault monitoring in ungrounded electrical networks. The method includes the following steps: measuring an insulation resistance, determining a responding value for the insulation resistance, and triggering a warning signal if the measured insulation resistance falls below the responding value, wherein the responding value is determined dynamically as a momentary responding value in a warning value establishment process downstream of the insulation resistance measurement.