Device for detecting electrical currents on or near electrical conductors

US11162984B2 · kind B2 · utility

Assignee

• DEHN SE + CO KG · DE

Inventors

• Peter Zahlmann · Dresden, DE
• Josef Birkl · Berching, DE
• Thomas Böhm · Zorneding, DE
• Klaus Bühler · Endingen am Kaiserstuhl, DE
• Johannes Maget · Parsberg, DE
• Arnd Ehrhardt · Dresden, DE
• Eduard Shulzhenko · Ilmenau, DE

Key dates

• Filing date: May 22, 2018
• Grant date: Nov 2, 2021
• Expiry date: Aug 16, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/52
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a method for detecting electrical currents on or near electrical conductors with at least one reed switch as a magnetically responsive switch, which is arranged near the electrical conductor such that when there is a significant current flow through the conductor, the magnetic field created triggers the switch and initiates evaluation electronics connected to the switch. For the detection of surge current variables and differentiation between long-term pulsed currents and short-term pulsed currents, a plurality of reed switches is arranged at pre-determined, different, increasing distances from the electrical switch, the evaluation electronics determining the response and the switching times of the respective reed switches. The surge current variables are determined from the association of the determined values with the respective reed switch and the pulse shape from the switching time.