N. Ground-Fault Protection Systems

1. Properties and Types

Identify properties, types, and applications ^{2, 3, 4}

• The Trouble with Ground Fault Testing
• Monitoring a Grounded System
• Examples of modified differential ground fault protection systems
• Modified Differential Ground Fault Protection
• Ground Fault Protection Requirements at Health Care Facilities
• Which Scheme For Sensing Ground Faults To Choose
• 4 essential ground-fault protective schemes
• Ground-Fault Protection Systems for Services

2. Inspection and Test Procedures

Apply visual and mechanical inspections ^{2, 3, 4}

• NFPA 70 2017: Article 230.95 Ground-Fault Protection of Equipment ^2 3 4
• NFPA 70B: Chapter 13 Ground-Fault Protection ^2 3 4
• Ground Fault Protection Guide
• Inspection of Ground-Fault Protection Systems

Employ methods and procedures for electrical tests ^{2, 3, 4}

• Ground Fault Protection Systems: Performance Testing Basics
• GEI-48907 GE ground fault protection systems performance testing ^2 3 4
• Field Test Procedure for Modified Differential Ground Fault Protection Systems
• Performance Testing of Ground-Fault Protective Devices
• Ground Faults in Photovoltaic Systems
• Generator Stator Ground Fault Protection

3. Interpretation of Test Results

Evaluate results of electrical tests ^{2, 3, 4}

• NETA-ATS 2017: Section 7.14 Ground-Fault Protection Systems ^2 3 4
• NETA-MTS 2019: Section 7.14 Ground-Fault Protection Systems ^2 3 4

Last Update: Feb 02, 2025