NDLI: Arc-fault protection of branch circuits, cords and connected equipment

Content Provider	IEEE Xplore Digital Library
Author	Parise, G. Martirano, L. Nabours, R.E.
Copyright Year	2003
Description	Author affiliation: Dipt. di Energia Elettrica, Rome Univ., Italy (Parise, G.; Martirano, L.)
Abstract	In electrical power systems, the fault frequently involves arcing and burning for all the wiring exposed to mechanical damage and other insulation stresses including wiring not fixed and connected by flexible cords and cables. The IEC Standard 60364 stops the design of electric power systems at the outlets of branch circuits or at the fixed equipment. A complete design instead should take care of the connections of the portable equipment and of extension cords (as requested by NFPA 70) that are exposed to arc-faults and may cause fire and/or electric shock hazard. The cords supplying the Class II equipment are without a grounding protection conductor, so the failure of the double insulation, caused by external damage, can't be expected to be easily detected as a ground fault. A protection must be provided to prevent the fault from extinguishing itself without being detected and remaining energized, thus presenting an electric shock hazard by direct contact with a live part, rendered accessible after local insulation failure. The authors highlight this worst case and suggest the protection achieved by wiring the circuits, particularly extension cords, with special power cables. Ground-fault-forced cables, GFFCs convert a line-to-line fault into a line to ground fault, that will be detected and protected by ordinary ground fault protective devices (GFPDs). By adopting the GFFC type of cables internally to Class II equipment, the disconnecting supplying measure could be extended to equipment also.
Sponsorship	IEEE Ind. Appl. Soc. Ind. & Commerical Power Syst. Dept. IEEE Region 5 IEEE St. Louis Sect
Starting Page	85
Ending Page	88
File Size	314507
Page Count	4
File Format	PDF
ISBN	0780377710
DOI	10.1109/ICPS.2003.1201492
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-05-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Circuit faults Wiring Electrical fault detection Power system protection Dielectrics and electrical insulation Electric shock Hazards Power system faults Cable insulation Stress
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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