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. 12, 2026
Filed:
May. 28, 2024
Pepperl+fuchs SE, Mannheim, DE;
Martin Jung, Mannheim, DE;
Pepperl+Fuchs SE, Mannheim, DE;
Abstract
A crowbar circuit for a voltage transformer, comprising: a triggering device for triggering a short circuit via input terminals depending on control voltage; a comparator configured to trigger the triggering device depending on a comparator voltage at a comparator input and a reference voltage threshold value, a Zener diode with a breakdown voltage in series with a fifth resistor, connected between an input terminal and the comparator input, such that when the input voltage exceeds the breakdown voltage, the comparator voltage triggers the short circuit; a series connection of a seventh resistor, an eighth resistor, the fifth resistor and a sixth resistor, wherein load current at an output flows through the seventh and sixth resistors and wherein the comparator input is connected to a node between the fifth and eighth resistors, and the series connection is connected between the input terminals, such that upon exceeding a predetermined threshold current, the comparator voltage triggers the short-circuit.