NBN EN 61241-18 : 2005

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

Applies 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.