• IEC 61241-4:2001

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Superseded date:  21-07-2014

    Language(s):  English, English - French, Spanish, Castilian

    Published date:  07-03-2001

    Publisher:  International Electrotechnical Committee

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    Table of Contents - (Show below) - (Hide below)

    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

    Abstract - (Show below) - (Hide below)

    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.

    General Product Information - (Show below) - (Hide below)

    Committee TC 31
    Development Note Also numbered as BS IEC 61241-4. (09/2001) Stability Date: 2014. (10/2012)
    Document Type Standard
    Publisher International Electrotechnical Committee
    Status Superseded

    Standards Referenced By This Book - (Show below) - (Hide below)

    UNE-EN 60079-17:2014 Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
    BS EN 60079-17:2014 Explosive atmospheres Electrical installations inspection and maintenance
    I.S. EN 60079-0:2012 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS (IEC 60079-0:2011 (MOD))
    BS EN 61241-17:2005 ELECTRICAL APPARATUS FOR USE IN THE PRESENCE OF COMBUSTIBLE DUST - PART 17: INSPECTION AND MAINTENANCE OF ELECTRICAL INSTALLATIONS IN HAZARDOUS AREAS (OTHER THAN MINES)
    12/30270980 DC : 0 BS EN 1127-2 - EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
    CSA C22.2 No. 60079.0 : 2015 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS
    BS EN 60079-19 : 2011 EXPLOSIVE ATMOSPHERES - PART 19: EQUIPMENT REPAIR, OVERHAUL AND RECLAMATION
    BS EN 1127-1:2019 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology
    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
    EN 61241-17:2005 Electrical apparatus for use in the presence of combustible dust - Part 17: Inspection and maintenance of electrical installations in hazardous areas (other than mines)
    NF EN 60079-19 : 2011 AMD 1 2015 EXPLOSIVE ATMOSPHERES - PART 19: EQUIPMENT REPAIR, OVERHAUL AND RECLAMATION
    BS EN 1127-1:2011 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology
    09/30206527 DC : 0 BS EN 60079-0 ED 6.0 - EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS
    BIS IS/IEC 60079-0 : 2011 EXPLOSIVE ATMOSPHERES - PART 0: GENERAL REQUIREMENTS
    DIN EN 1127-1:2011-10 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
    EN 60079-14:2014/AC:2016 EXPLOSIVE ATMOSPHERES - PART 14: ELECTRICAL INSTALLATIONS DESIGN, SELECTION AND ERECTION (IEC 60079-14:2013/COR1:2016)
    CSA C22.4 No. 1 : 2009(R2018) OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE
    CEI EN 60079-17 : 2015 EXPLOSIVE ATMOSPHERES - PART 17: ELECTRICAL INSTALLATIONS INSPECTION AND MAINTENANCE
    BS IEC 61241-4:2001 ELECTRICAL APPARATUS FOR USE IN THE PRESENCE OF COMBUSTIBLE DUST - TYPE OF PROTECTION "PD"
    I.S. EN 60079-17:2014 EXPLOSIVE ATMOSPHERES - PART 17: ELECTRICAL INSTALLATIONS INSPECTION AND MAINTENANCE
    I.S. EN 1127-1:2011 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
    EEMUA 186 : 2016 A PRACTITIONER'S HANDBOOK FOR POTENTIALLY EXPLOSIVE ATMOSPHERES
    UNE-EN 60079-14:2016 Explosive atmospheres - Part 14: Electrical installations design, selection and erection
    BS EN 60079-14:2014 Explosive atmospheres Electrical installations design, selection and erection
    IEC 61241-17:2005 Electrical apparatus for use in the presence of combustible dust - Part 17: Inspection and maintenance of electrical installations in hazardous areas (other than mines)
    C22.10-10 Québec Construction Code, Chapter V - Electricity Canadian Electrical Code, Part I (Twenty-first Edition) with Québec Amendments
    CSA C22.4 PACKAGE : 2009 CONSISTS OF C22.4 NO. 1-09, OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE AND C22.4 NO. 2-09, OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE - SAFETY MANAGEMENT SYSTEM REQUIREMENTS
    12/30268608 DC : 0 BS EN 60079-17/ED 5 - EXPLOSIVE ATMOSPHERES - PART 17: ELECTRICAL INSTALLATIONS INSPECTION AND MAINTENANCE
    I.S. EN 61241-17:2005 ELECTRICAL APPARATUS FOR USE IN THE PRESENCE OF COMBUSTIBLE DUST - PART 17: INSPECTION AND MAINTENANCE OF ELECTRICAL INSTALLATIONS IN HAZARDOUS AREAS (OTHER THAN MINES)
    UNE-EN 60079-0:2013 Explosive atmospheres - Part 0: Equipment - General requirements
    05/30134569 DC : DRAFT JUN 2005 IEC 60079-0. ED. 5.0 - ELECTRICAL APPARATUS FOR EXPLOSIVE ATMOSPHERES - PART 0: GENERAL REQUIREMENTS
    IEC 60079-19:2010+AMD1:2015 CSV Explosive atmospheres - Part 19: Equipment repair, overhaul and reclamation
    BIS IS/IEC 60079-1 : 2007 EXPLOSIVE ATMOSPHERES - PART 1: EQUIPMENT PROTECTION BY FLAMEPROOF ENCLOSURES 'D'
    I.S. EN 60079-14:2014 EXPLOSIVE ATMOSPHERES - PART 14: ELECTRICAL INSTALLATIONS DESIGN, SELECTION AND ERECTION
    11/30247086 DC : 0 BS EN 60079-1 ED. 7.0 - EXPLOSIVE ATMOSPHERES - PART 1: EQUIPMENT PROTECTION BY FLAMEPROOF ENCLOSURES "D"
    UNI EN 1127-1 : 2011 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
    PREN 1127-2 : DRAFT 2012 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
    BS EN 60079-0 : 2012 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS
    UNE-EN 60079-19:2011 Explosive atmospheres - Part 19: Equipment repair, overhaul and reclamation
    IEC 60079-17:2013 Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
    12/30269297 DC : 0 BS EN 60079-14/ED 5 - EXPLOSIVE ATMOSPHERES - PART 14: ELECTRICAL INSTALLATIONS DESIGN, SELECTION AND ERECTION
    13/30286778 DC : 0 BS EN 60079-1 - EXPLOSIVE ATMOSPHERES - PART 1: EQUIPMENT PROTECTION BY FLAMEPROOF ENCLOSURES 'D'
    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

    Standards Referencing This Book - (Show below) - (Hide below)

    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 61241-2-3:1994 Electrical apparatus for use in the presence of combustible dust - Part 2: Test methods - Section 3: Method for determining minimum ignition energy of dust/air mixtures
    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
    IEC 61241-2-1:1994 Electrical apparatus for use in the presence of combustible dust - Part 2: Test methods - Section 1: Methods for determining the minimum ignition temperatures of dust
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