BS 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Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Electrical apparatus for use in the presence of combustible dust Type of protection \'pD\'
Hardcopy , PDF
28-02-2007
English
06-09-2001
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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
Specifies 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 |
EXL/31
|
| DevelopmentNote |
Also numbered as IEC 61241-4. (09/2001) Supersedes 97/206188 DC (05/2005)
|
| DocumentType |
Standard
|
| Pages |
26
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
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.
| 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 61241-4:2001 | Electrical apparatus for use in the presence of combustible dust - Part 4: Type of protection "pD" |
| 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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