US 11,789,060 B2
Grounded socket and method for insulation fault location in an ungrounded power supply system including insulation monitoring
Pascal Becker, Gruenberg (DE); and Karl Schepp, Reiskirchen (DE)
Assigned to BENDER GMBH & CO. KG, Gruenberg (DE)
Filed by Bender GmbH & Co. KG, Gruenberg (DE)
Filed on Jun. 4, 2021, as Appl. No. 17/338,770.
Claims priority of application No. 10 2020 114 906.9 (DE), filed on Jun. 4, 2020.
Prior Publication US 2021/0382104 A1, Dec. 9, 2021
Int. Cl. G01R 31/08 (2020.01); H01R 13/652 (2006.01); H01R 13/66 (2006.01); H01R 13/717 (2006.01)
CPC G01R 31/086 (2013.01) [H01R 13/652 (2013.01); H01R 13/6683 (2013.01); H01R 13/7175 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A grounded socket for locating an insulation fault in an ungrounded power supply system including insulation monitoring by a standard insulation monitoring device according to standard IEC61557-8 superimposing a measuring voltage on the ungrounded power supply system for determining an insulation resistance of the ungrounded power supply system, the grounded socket comprising:
a housing having electrical contacts;
a signaling device for signaling an insulation state; and
a current measuring device for detecting and evaluating a differential current, the current measuring device having a measuring current transformer and evaluating electronics,
wherein the current measuring device is configured for high-resolution detection in a μA range and evaluating the differential current by evaluating a measuring current driven by the measuring voltage as a differential measuring current, and wherein the evaluating electronics are configured to assess differential measuring current curve to establish synchronous insulating fault signaling between the standard insulation monitoring device and the grounded socket.