NDLI: Shock Hazard in the Presence of Protective Residual Current Devices

Content Provider	IEEE Xplore Digital Library
Author	Mitolo, M.
Copyright Year	2007
Description	Author affiliation: Chu & Gassman, Middlesex (Mitolo, M.)
Abstract	The application of the residual current principle, as carried out by zero sequence current protective devices, is one of the most efficient ways to reduce the hazard of electric shock in case of the failure of equipment's basic insulation-to-ground. Highly sensitive, and regularly tested, residual current operated circuit-breakers without integral overcurrent protection devices (RCCBs) are rightfully recognized worldwide by standards and codes, as an effective means to protect persons against direct and indirect contact with energized parts by disconnecting the supply in a timely fashion. These devices are also referred to as ground fault circuit interrupters (GFCIs). The protective action of the RCCBs, though, can be nullified not only due to internal malfunctions of the device, but also due to particular ground-fault conditions. In these dangerous situations for persons, for example accidental direct contact with two parts at different potentials, the residual current flowing through the RCCB is below its residual operating value, and, therefore, it cannot trip. This hazardous circumstance exposes persons to dangerous touch voltages despite the presence of an efficient protective device, which cannot be blamed for not intervening. This paper seeks to clarify these particular fault conditions, occurring in the presence of healthy RCCBs.
Starting Page	1
Ending Page	6
File Size	1283837
Page Count	6
File Format	PDF
ISBN	1424412900
DOI	10.1109/ICPS.2007.4292108
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-05-06
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electric shock Hazards Grounding Circuit faults Power system protection Immune system Conducting materials Circuit testing Interrupters Contacts TT systems Direct contact Indirect Contact Earth Exposed-conductive-part (ECPs) Ground Ground Potential Rise Neutral IT systems Single-phase line-to-ground fault Residual Current Operated Circuit-Breakers without integral overcurrent protection (RCCBs) TN systems
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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