Zone based protection for low voltage systems; zone selective interlocking, bus differential and the single processor concept

Time based coordination and protection is the normal basis for coordinating low voltage power distribution systems. Enhancements, such as zone selective interlocking and bus differential protection, may be used to accelerate protective devices. However, these improvements may be costly, difficult to...

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Bibliographic Details
Published in2008 IEEE/IAS Industrial and Commercial Power Systems Technical Conference pp. 1 - 10
Main Authors Valdes, M., Hamer, P., Papallo, T., Narel, R., Premerlani, B.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2008
Subjects
bus differential
Circuit breakers
Circuit faults
coordination
Current transformers
Delay
Delay effects
directional overcurrent protection
Fault currents
Impedance
motor contribution
Selectivity
Single-Processor-Concept
zone-selective-interlocking
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Summary:Time based coordination and protection is the normal basis for coordinating low voltage power distribution systems. Enhancements, such as zone selective interlocking and bus differential protection, may be used to accelerate protective devices. However, these improvements may be costly, difficult to implement, and may not function as expected using commonly available technology. Nevertheless, the potential benefit of fault clearing speed and selectivity are more valued in todaypsilas arc-flash and reliability conscious environment than ever before. The writers shall discuss some issues associated with these traditional improvements, pitfalls to avoid and, more effective ways to implement zone-based protection to achieve fast fault protection while maintaining complete selectivity for a broad range of fault magnitudes, system configurations and load types.
ISBN:1424420938
9781424420933
ISSN:2158-4893
2158-4907
DOI:10.1109/ICPS.2008.4606296