Device for detecting electrical currents on or in the vicinity of electrical conductors

US11454653B2 · 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 23, 2018
• Grant date: Sep 27, 2022
• Expiry date: May 23, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R29/0842
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a device for detecting electrical currents on or in the vicinity of electrical conductors with at least one Reed switch as a magnetically responsive switch, which is arranged in the vicinity of the electrical conductor such that, when there is a significant current flow through the conductor, the magnetic field created triggers the switch and initiates an evaluation electronics connected to the switch. For the detection of surge current variables and the differentiation between long-term pulsed currents and short-term pulsed currents, a plurality of Reed switches are arranged at a predetermined distance from the electrical conductor, wherein the evaluation electronics determines the response and the switching times of the respective Reed switches, determines die surge current variable from the allocation of the determined values to the respective Reed switch and the pulse form from the switching time, wherein, for the purpose of adjusting the response behavior, at least one of the Reed switches comprises a shielding for influencing the magnetic field acting on the respective Reed switch.