I.S. EN 61241-4:2007
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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ELECTRICAL APPARATUS FOR USE IN THE PRESENCE OF COMBUSTIBLE DUST - PART 4: TYPE OF PROTECTION 'PD'
Hardcopy , PDF
21-01-2015
English
01-01-2007
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
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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
Presents 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.
| DocumentType |
Standard
|
| Pages |
60
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| NF EN 61241-4 : 2007 | Identical |
| BS EN 61241-4:2006 | Identical |
| UNE-EN 61241-4:2007 | Identical |
| EN 61241-4:2006 | Identical |
| DIN EN 61241-4 : 2007 | Identical |
| IEC 61241-4:2001 | Identical |
| NBN EN 61241-4 : 2007 | Identical |
| 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 |
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