Français
3. Earth-fault protection for impedant neutrals
3.1 Current flow in the event of earth faults
3.1.1 Equivalent zero-sequence diagram
Before discussing protection settings, it's essential to understand the flow of currents that a stable earth fault causes in the network. The diagram at 4 illustrates this flow in the case of an open fault: the voltage of the faulted phase with respect to earth is zero, and the voltages of the healthy phases become equal to the compound voltage....
The Ultimate Scientific and Technical Reference
This article is included in
Electricity networks and applications
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Earth-fault protection for impedant neutrals
Earth-fault protection for compensated neutrals
Bibliography
- (1) - WILLHEM (R.), WATERS (M.) - Neutral grounding in high voltage transmission. - Elsevier publishing company.
Also in our database
Standards and norms
- Technical decree – Technical requirements for electrical power distribution - UTE C11-001 -
- Postes de livraison établis à l'intérieur d'un bâtiment et alimentés par un réseau de distribution publique HTA (jusqu'à 33 kV) - NF C13-100 -
- Effects of current on humans and pets – Part 1: General aspects - CEI 60479-1 -
- Effects of current on humans and pets – Part 5: Contact voltage threshold values...
The Ultimate Scientific and Technical Reference
