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EN 61241-4:2006

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Electrical apparatus for use in the presence of combustible dust - Part 4: Type of protection "pD"
Superseded date

12-01-2014

Published date

12-19-2006

FOREWORD
1 Scope
2 Normative references
3 Definitions
4 Pressurization principle
   4.1 Protective gas
   4.2 Automatic disconnection
   4.3 Cleaning
   4.4 Discharge of protective gas
5 General constructional requirements
   5.1 Electrical performance of apparatus
   5.2 Mechanical strength
   5.3 Apertures
   5.4 Electrical connections to enclosures
   5.5 Doors and covers
6 Temperature limits
7 Safety provisions and safety devices (except for static
   pressurization)
   7.1 General
   7.2 Pressure- or flow-activated devices
   7.3 Electrical supply
   7.4 Switching off electrical supply
   7.5 Failure of pressurization
   7.6 Level of overpressure
   7.7 Possible sources of ignition
   7.8 Enclosed components
   7.9 Separate enclosures
8 Safety provisions and safety devices for static pressurization
9 Supply of protective gas
   9.1 Type of gas
   9.2 Second source of supply
   9.3 Temperature
10 Verification and tests
   10.1 General
   10.2 Type verification and tests
   10.3 Overpressure test
   10.4 Minimum overpressure test
   10.5 Leakage test
   10.6 Impact test
   10.7 Routine tests
11 Marking
   11.1 Pressurized enclosure
   11.2 Additional marking
   11.3 Pressurized enclosures protected by static pressurization
   11.4 Any other marking required
Annex A (normative) Ducts for protective gas supply
Annex B (normative) Installation requirements for pressurization
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Annex ZZ (informative) Coverage of Essential Requirements of
         EC Directives

Gives requirements on the design, construction, testing and marking of electrical apparatus for use in combustible dust atmospheres in which a protective gas (air or inert gas), maintained at a pressure above that of the external atmosphere, is used to prevent the entry of dust which might otherwise lead to the formation of a combustible mixture within enclosures which do not contain a source of combustible dust.

Committee
CLC/TC 31
DevelopmentNote
To be read in conjunction with EN 61241-0. (02/2007)
DocumentType
Standard
PublisherName
European Committee for Standards - Electrical
Status
Superseded
SupersededBy

UNE-EN 60079-17:2014 Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
I.S. EN 60079-0:2012 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS (IEC 60079-0:2011 (MOD))
12/30270980 DC : 0 BS EN 1127-2 - EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
BS EN 60079-19 : 2011 EXPLOSIVE ATMOSPHERES - PART 19: EQUIPMENT REPAIR, OVERHAUL AND RECLAMATION
EN 60079-19:2011/A1:2015 EXPLOSIVE ATMOSPHERES - PART 19: EQUIPMENT REPAIR, OVERHAUL AND RECLAMATION (IEC 60079-19:2010)
UNE-EN 1127-1:2012 Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology
BS EN 60079-17:2014 Explosive atmospheres Electrical installations inspection and maintenance
BS EN 60079-0 : 2012 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS
BS EN 1127-1:2011 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology
DIN EN 1127-1:2011-10 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
CEI EN 60079-17 : 2015 EXPLOSIVE ATMOSPHERES - PART 17: ELECTRICAL INSTALLATIONS INSPECTION AND MAINTENANCE
UNI EN 1127-1 : 2011 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
I.S. EN 60079-17:2014 EXPLOSIVE ATMOSPHERES - PART 17: ELECTRICAL INSTALLATIONS INSPECTION AND MAINTENANCE
BS EN 1127-1:2019 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology
UNE-EN 60079-14:2016 Explosive atmospheres - Part 14: Electrical installations design, selection and erection
UNE-EN 60079-0:2013 Explosive atmospheres - Part 0: Equipment - General requirements
PREN 1127-2 : DRAFT 2012 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
I.S. EN 1127-1:2011 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
UNE-EN 60079-19:2011 Explosive atmospheres - Part 19: Equipment repair, overhaul and reclamation
EN 60079-0:2012/A11:2013 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS (IEC 60079-0:2011, MODIFIED)
EN 60079-17:2014 Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
EN 1127-1:2011 Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology

EN 60034-1:2010/corrigendum Oct. 2010 ROTATING ELECTRICAL MACHINES - PART 1: RATING AND PERFORMANCE
IEC 61241-1-1:1999 Electrical apparatus for use in the presence of combustible dust - Part 1-1: Electrical apparatus protected by enclosures and surface temperature limitation - Specification for apparatus
IEC 61241-3:1997 Electrical apparatus for use in the presence of combustible dust - Part 3: Classification of areas where combustible dust are or may be present
IEC 60034-1:2017 Rotating electrical machines - Part 1: Rating and performance
IEC 61241-1-2:1999 Electrical apparatus for use in the presence of combustible dust - Part 1-2: Electrical apparatus protected by enclosures and surface temperature limitation - Selection, installation and maintenance
1994/9/EC : 1994 DIRECTIVE 94/9/EC OF THE EUROPEAN PARLIAMENT AND THE COUNCIL OF 23 MARCH 1994 ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES CONCERNING EQUIPMENT AND PROTECTIVE SYSTEMS INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES

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