Title:
GROUND FAULT PROTECTION IN A HIGH RESISTANCE GROUNDING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/029498
Kind Code:
A8
Abstract:
Systems, methods, techniques and apparatuses of ground fault protection are disclosed. One exemplary embodiment is a power switch being structured to receive a load current from a power source at a source-side and selectively output the load current from a load-side to a load; a first voltage measuring device structured to measure a first voltage of the source-side while the power switch is conducting the load current; a second voltage measuring device structured to measure a second voltage of the load-side while the first voltage measuring device is measuring the first voltage; and a controller structured to determine a source-side-to-ground voltage based on the first voltage, determine a load-side- to-ground voltage based on the second voltage, determine a ground fault is occurring, and determine a direction of the ground fault relative to the power switch by comparing the source-side-to-ground voltage and the load-side-to-ground voltage.
Inventors:
KENDZIA III THOMAS (US)
BOSE VEERAKUMAR (US)
BOSE VEERAKUMAR (US)
Application Number:
PCT/IB2021/000546
Publication Date:
February 02, 2023
Filing Date:
August 05, 2021
Export Citation:
Assignee:
ABB SCHWEIZ AG (CH)
International Classes:
H02H3/16; H02H3/38; H02H9/08
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