Sensitive Ground-Fault Relaying

Interest has been generated in recent years about sensitive ground-fault relaying on the utilization portions of industrial power systems. Sensitive ground-fault protection refers to the concept of detecting low levels of ground-fault current that might cause an electrocution in any human that could...

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Bibliographic Details
Main Authors: Morley, L. A., Novak, T., Trutt, F. C.
Format: Conference Proceeding
Language:English
Subjects:
Conductors
Current transformers
Fibrillation
Relays
Saturation magnetization
Transformer cores
Windings
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Summary:Interest has been generated in recent years about sensitive ground-fault relaying on the utilization portions of industrial power systems. Sensitive ground-fault protection refers to the concept of detecting low levels of ground-fault current that might cause an electrocution in any human that could be part of the ground-current path. Research under U.S. Bureau of Mines Contracts JO 100096 and JO 113009 has provided a background into the needs and requirements for this kind of protection. Subsequent work on Bureau of Mines Contract JO134025 hes resulted in zero-sequence devices for three-phase industrial utilization systems and a saturable-transformer concept for dc utilization. This paper provides a review of the importance and requirements for sensitive ground-fault protection. Relaying schemes for both ac and dc systems are also presented. The paper contents are projected at mine power systems, but the material is likely applicable to any portable low-voltage portion of industrial power systems that involve personnel handling.
ISSN:2576-702X
2576-702X