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EN 61241-18:2004

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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 18: Protection by encapsulation "mD"
Superseded date

12-01-2009

Published date

11-10-2004

Publisher

European Committee for Standards - Electrical

INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 General
   4.1 Temperature classification
   4.2 Level of protection
   4.3 Level of protection "maD"
   4.4 Level of protection "mbD"
   4.5 Supply specifications
5 Requirements for compounds
   5.1 General
   5.2 Specification
6 Temperatures
   6.1 General
   6.2 Temperature limitation
   6.3 Determination of the limiting temperature values
7 Constructional requirements
   7.1 General
   7.2 Determination of possible faults
   7.3 Switching contacts
   7.4 External connections
   7.5 Protection of bare live parts
   7.6 Cells and batteries
   7.7 Protective devices
8 Type tests
   8.1 Tests on the compound - water absorption test
   8.2 Tests on the apparatus
9 Routine verifications and tests
   9.1 Visual inspections
   9.2 Dielectric strength test
10 Marking
Annex A (informative) Basic requirements for compounds
                       for encapsulation "mD" apparatus
Annex B (normative) Allocation of test samples
Annex C (normative) Test procedure during thermal cycling test
Annex ZA (normative) Normative references to international
                       publications with their corresponding
                       European publications
Annex ZZ (informative) Coverage of Essential Requirements of
                       EC Directives

Applicable to electrical apparatus protected by encapsulation type of protection mD and surface temperature limitation for use in areas where combustible dust may be present in quantities which could lead to a fire or explosion hazard. Specifies requirements for design, construction and testing of electrical apparatus, parts of electrical apparatus and Ex components where the rated voltage does not exceed 10 kV. The application of electrical apparatus in atmospheres which may contain explosive gas as well as combustible dust, whether simultaneously or separately, requires additional protective measures.

Committee
CLC/TC 31
DevelopmentNote
To be read in conjunction with EN 61241-0. (12/2004)
DocumentType
Standard
PublisherName
European Committee for Standards - Electrical
Status
Superseded
SupersededBy

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