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DGUV Information 203-078 - Thermal hazards from electric fau...
DGUV Information 203-078 - Thermal hazards from electric fault arc Guide to the selection of personal protective equipment for electrical work (bisher: BGI/GUV-I 5188 E)
Titel: Thermal hazards from electric fault arc Guide to the selection of personal protective equipment for electrical work (bisher: BGI/GUV-I 5188 E)
Normgeber: Bund
Amtliche Abkürzung: DGUV Information 203-078
Gliederungs-Nr.: [keine Angabe]
Normtyp: Satzung

Thermal hazards from electric fault arc
Guide to the selection of personal protective equipment for electrical work
(bisher: BGI/GUV-I 5188 E)

Information

string DGUV
Deutsche Gesetzliche Unfallversicherung Spitzenverband

Published in October 2012

 

Table of Contents Abschnitt
  
Preliminary remarks  
Scope 1
Definitions 2
Procedures for selecting PPEgS 3
Overview of the evaluation process3.1
Work environment parameters3.2
Determination of system electric arc energy in the event of a fault3.3
Determination of equivalent arc energy3.4
Selection of PPE3.5
Instructions for practical application with practical examples 4
Instructions for practical application4.1
Examples4.2
Examples of work locations for determining transmission factor k T 4.3
  
Directives, regulations, literature Annex 1
Standardisation of PPE against the thermal effects of electric fault arcing Annex 2
Standards for protective clothing in Europe A 2.1
Standards for protective clothing outside the EU A 2.2
Standards for other types of PPE A 2.3
Specification standards for product approval and selection A 2.4
Parameters and risk analysis of thermal hazards to persons related to electric arcing Annex 3
Energy parameters for thermal hazards to persons related to electric arcing A 3.1
Process of risk analysis A 3.2
Work steps A 3.3
Alternative test methods A 3.4
PPE selection support form Annex 4

 

Preliminary remarks

Persons working on or in the vicinity of live electrical equipment are, in principle, exposed to hazards associated with electric fault arc. While an electric arc flash is rare in the normal working environment, its occurrence cannot be ruled out completely. For this reason, persons working in this environment will require reliable protection, especially because incorrectly performed work tasks can cause such arcing. Electric arcs are not only induced by short circuiting, but can also occur between two current-carrying components, when they are separated from each other (e. g. installation/removal of circuit protectors while under load).

The information contained herein is intended to support employers in their selection of suitable equipment (e. g. protective clothing or face shields for electrical work, etc.) for protection against the thermal effects of electric fault arcs. In so doing, a methodology has been adopted based on standardised Box test procedures according to VDE 0682-306-1-2 (see Annex 1).

Depending on the electrical network and equipment configuration, electric arcing can be extremely hazardous:

  • High levels of thermal energy.

  • Shockwaves and associated fragments released by the explosive propagation of an arc flash.

  • High intensity electromagnetic radiation, particularly in the ultraviolet (UV) and infrared (IR) radiation bands, but also in the visible light band, which can lead to irreversible damage to the eyes and skin.

  • High levels of acoustic shock (bang).

  • Toxic gases and particles produced by melting and vaporised materials in the vicinity of the arc flash (including electrodes).

Each consequence, in itself, can endanger the health and even the life of a person in proximity of the occurrence. The most serious personal risks are associated with the thermal effects of electric fault arcs.

NOTE:
Methodologies based on a selection criteria where PPE is tested according to VDE 0682-306-1-1 (see Annex 1) are already described in NFPA 70e (Standard for Electrical Safety in the Workplace) and IEEE 1584-2002 (Guide for performing arc-flash hazard calculations), among others, and, for this reason, are not presented directly in this guide.

NOTE:
Moreover, an overview of PPE selection is included in the ISSA (International Social Security Association) Guideline for the selection of personal protective equipment when exposed to the thermal effects of an electric fault arc (2nd edition 2011).

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Insurance e.V. (DGUV)

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10117 Berlin
Tel.: 030 288763800
Fax: 030 288763808
E-Mail: info@dguv.de
Website: www.dguv.de

Subcommittee "Electrical and precision engineering", Expert Committee "Energy, textile electrical and media products sectors" the DGUV.

Design
German Social Accident Insurance e.V. (DGUV), Media Production

English translation of the German edition from October 2012

BGI/GUV-I 5188 E available from the competent German social accident insurance institution or on www.dguv.de/publikationen