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IEC 61241-11:2005

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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 11: Protection by intrinsic safety 'iD'
Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Superseded date

06-30-2011

Published date

10-24-2005

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Grouping and classification of intrinsically safe
   apparatus and associated apparatus
5 Categories of electrical apparatus
6 Apparatus construction
   6.1 Enclosures
   6.2 Temperatures of apparatus immersed in dust
   6.3 Facilities for connection of external circuits
   6.4 Separation distances
   6.5 Protection against polarity reversal
   6.6 Earth conductors, connections and terminals
   6.7 Encapsulation used for exclusion of potentially
         explosive atmosphere
7 Components on which intrinsic safety depends
   7.1 Rating of components
   7.2 Connectors for internal connections, plug-in cards
         and components
   7.3 Fuses
   7.4 Primary and secondary cells and batteries
   7.5 Semiconductors
   7.6 Failure of components and connections
   7.7 Piezo-electric devices
8 Infallible components, infallible assemblies of components
   and infallible connections
9 Diode safety barriers
10 Type verifications, assessments and type tests
   10.1 Spark ignition assessment
   10.2 Temperature tests
   10.3 Voltage tests
   10.4 Small component ignition test
   10.5 Determination of parameters of loosely specified
         components
   10.6 Tests for cells and batteries
   10.7 Mechanical test
   10.8 Tests for apparatus containing piezoelectric devices
   10.9 Type tests for diode safety barriers and safety shunts
   10.10 Cable pull test
11 Routine verifications and tests
12 Marking
   12.1 General
   12.2 Marking of connection facilities
13 Documentation
Annex A (normative) See Annex B of IEC 60079-11
Annex B (informative) See Annex C of IEC 60079-11
Annex C (normative) See Annex D of IEC 60079-11

This part of IEC 61241 specifies requirements for the construction and testing of intrinsically safe apparatus intended for use in potentially explosive dust cloud or dust layer environments and for associated apparatus that is intended for connection to intrinsically safe circuits which enter such environments.The contents of the corrigendum of February 2006 have been included in this copy.

DevelopmentNote
To be read in conjunction with IEC 61241-0. (10/2005)
DocumentType
Standard
Pages
33
PublisherName
International Electrotechnical Committee
Status
Superseded
SupersededBy

BS EN 61241-17:2005 Electrical apparatus for use in the presence of combustible dust Inspection and maintenance of electrical installations in hazardous areas (other than mines)
BIS IS/IEC 60079-25 : 2010 EXPLOSIVE ATMOSPHERES - PART 25: INTRINSICALLY SAFE ELECTRICAL SYSTEMS
BS EN 61241-14:2004 Electrical apparatus for use in the presence of combustible dust Selection and installation
CSA C22.2 No. 60079-25 : 2014 EXPLOSIVE ATMOSPHERES - PART 25: INTRINSICALLY SAFE ELECTRICAL SYSTEMS
UNE-EN 1127-1:2012 Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology
BS EN 61241-18:2004 Electrical apparatus for use in the presence of combustible dust Protection by encapsulation \'mD\'
EN 60079-25:2010/AC:2013 EXPLOSIVE ATMOSPHERES - PART 25: INTRINSICALLY SAFE ELECTRICAL SYSTEMS (IEC 60079-25:2010)
EN 61241-14:2004 Electrical apparatus for use in the presence of combustible dust - Part 14: Selection and installation
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)
I.S. EN 60079-25:2010 EXPLOSIVE ATMOSPHERES - PART 25: INTRINSICALLY SAFE ELECTRICAL SYSTEMS (IEC 60079-25:2010 (EQV))
12/30270980 DC : 0 BS EN 1127-2 - EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
I.S. EN 61241-14:2004 ELECTRICAL APPARATUS FOR USE IN THE PRESENCE OF COMBUSTIBLE DUST - PART 14: SELECTION AND INSTALLATION
CEI EN 60079-25 : 2012 EXPLOSIVE ATMOSPHERES - PART 25: INTRINSICALLY SAFE ELECTRICAL SYSTEMS
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
EN 60079-14:2014/AC:2016 EXPLOSIVE ATMOSPHERES - PART 14: ELECTRICAL INSTALLATIONS DESIGN, SELECTION AND ERECTION (IEC 60079-14:2013/COR1:2016)
BIS IS/IEC 60079-18 : 2009 EXPLOSIVE ATMOSPHERES - PART 18: EQUIPMENT PROTECTION BY ENCAPSULATION 'M'
VDI 2263 Blatt 7:2010-07 Dust fires and dust explosions - Hazards - assessment - protective measures - Dust fires and explosion protection in spraying and drying integrated equipment
BIS IS/IEC 60079-1 : 2007 EXPLOSIVE ATMOSPHERES - PART 1: EQUIPMENT PROTECTION BY FLAMEPROOF ENCLOSURES 'D'
02/204779 DC : DRAFT JULY 2002 IEC 61241-17 ED.1 - ELECTRICAL APPARATUS FOR USE IN THE PRESENCE OF COMBUSTIBLE DUST - PART 17: INSPECTION AND MAINTENANCE OF ELECTRICAL INSTALLATIONS IN HAZARDOUS AREAS (OTHER THAN MINES)
CSA C22.4 No. 1 : 2009(R2018) OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE
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)
NF EN 60079-25 : 2011 EXPLOSIVE ATMOSPHERES - PART 25: INTRINSICALLY SAFE ELECTRICAL SYSTEMS
BS EN 1127-1:2019 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology
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
IEC 61241-14:2004 Electrical apparatus for use in the presence of combustible dust - Part 14: Selection and installation
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)
BS EN 60079-14:2014 Explosive atmospheres Electrical installations design, selection and erection
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
UNE-EN 60079-25:2017 Explosive atmospheres -- Part 25: Intrinsically safe electrical systems
UNI EN 1127-1 : 2011 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
IEC 60079-25:2010 Explosive atmospheres - Part 25: Intrinsically safe electrical systems
IEC 61241-18:2004 Electrical apparatus for use in the presence of combustible dust - Part 18: Protection by encapsulation 'mD'
EN 61241-18:2004 Electrical apparatus for use in the presence of combustible dust - Part 18: Protection by encapsulation "mD"
02/205211 DC : DRAFT JULY 2002 IEC 61241-14 ED.1 - ELECTRICAL APPARATUS FOR USE IN THE PRESENCE OF COMBUSTIBLE DUST - PART 14: SELECTION AND INSTALLATION
BS EN 60079-25:2010 Explosive atmospheres Intrinsically safe electrical systems
11/30247086 DC : 0 BS EN 60079-1 ED. 7.0 - 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
PREN 1127-2 : DRAFT 2012 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
12/30269297 DC : 0 BS EN 60079-14/ED 5 - EXPLOSIVE ATMOSPHERES - PART 14: ELECTRICAL INSTALLATIONS DESIGN, SELECTION AND ERECTION
EN 1127-1:2011 Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology

IEC 61241-0:2004 Electrical apparatus for use in the presence of combustible dust - Part 0: General requirements
IEC 60079-11:2011 Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"
IEC 61241-1:2004 Electrical apparatus for use in the presence of combustible dust - Part 1: Protection by enclosures "tD"
IEC 60529:1989+AMD1:1999+AMD2:2013 CSV Degrees of protection provided by enclosures (IP Code)
IEC 60079-25:2010 Explosive atmospheres - Part 25: Intrinsically safe electrical systems
IEC 60079-0:2011 Explosive atmospheres - Part 0: Equipment - General requirements

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