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Ground Fault Detection and Insulation Monitoring Figures

Last Update: October 15, 2026

Figures created by Norbert Doerry for the Ground Fault Detection and Insulation Monitoring paper and presentation



Solidly Grounded System - GFCI - Ground Fault on L

Image (C) Copyright 2026 by Norbert Doerry – licensed via CC BY 4.0



Solidly Grounded System - GFCI - Ground Fault on N

Image (C) Copyright 2026 by Norbert Doerry – licensed via CC BY 4.0



Ground fault on ungrounded power system

Image (C) Copyright 2026 by Norbert Doerry – licensed via CC BY 4.0



Ground fault on ungrounded power system

Image (C) Copyright 2026 by Norbert Doerry – licensed via CC BY 4.0



Ground fault on ungrounded power system

Image (C) Copyright 2026 by Norbert Doerry – licensed via CC BY 4.0



Ground fault on high resistance grounded power system

Image (C) Copyright 2026 by Norbert Doerry – licensed via CC BY 4.0



Ground fault on solidly grounded power system

Image (C) Copyright 2026 by Norbert Doerry – licensed via CC BY 4.0



Ground fault on ungrounded power system - Low Resistance Ground Resistor Fault Clearing

Image (C) Copyright 2026 by Norbert Doerry – licensed via CC BY 4.0



Ground fault on high resistance grounded power system - pulsing grounding resistor

Image (C) Copyright 2026 by Norbert Doerry – licensed via CC BY 4.0



Ground fault on high resistance grounded power system - High frequency current injection

Image (C) Copyright 2026 by Norbert Doerry – licensed via CC BY 4.0



Amp Meter

Image (C) Copyright 2026 by Norbert Doerry – licensed via CC BY 4.0



GFCI Outlet

Image (C) Copyright 2022 by Norbert Doerry – licensed via CC BY 4.0


CorelDraw source file


(C) Copyright 2026 Norbert Doerry

This work by Norbert Doerry is licensed under CC BY 4.0

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