Monitoring device and method of monitoring an impedance of a protective conductor, and charging control unit

US11486907B2 · kind B2 · utility

Assignees

• TE Connectivity Germany GmbH · DE
• Heidelberger Druckmaschinen AG · DE

Inventors

• Stefan Kipp · Wiesloch, DE
• Gregor Karrasch · Lorsch, DE
• Stefan Stross · Dielheim, DE
• Stefan Engert · Bürstadt, DE

Key dates

• Filing date: Mar 15, 2019
• Grant date: Nov 1, 2022
• Expiry date: Jun 21, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T90/14
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A monitoring device for monitoring an impedance of a protective conductor. The monitoring device has a first voltage divider for connection to a voltage source including a series connection to a first resistor and a second resistor. The second resistor has a resistance value which corresponds to a threshold value for the impedance of the protective conductor. A second voltage divider includes a series connection to a third resistor and a bridge diode and a connection to the first resistor at a first end of the third resistor and connectable to a second end of the third resistor and to the protective conductor. A measuring device is provided for the detection of a bridge voltage between a first node and a second node if the impedance of the protective conductor is greater than the value of the second resistor.