AS/NZS 60079.18:2005

1 - AS/NZS 60079.18:2005 Electrical apparatus for explosive gas - Part 18: Construction, test and marking of type of protection encapsulation ‘m’ electrical apparatus
4 - PREFACE
5 - CONTENTS
7 - 1 Scope
7 - 2 Normative references
8 - 3 Definitions
9 - 4 General
9 - 4.1 Apparatus group and temperature classification
9 - 4.2 Level of protection
10 - 4.3 Level of protection “ma”
10 - 4.4 Level of protection “mb”
10 - 4.5 Supply specifications
10 - 5 Requirements for compounds
10 - 5.1 General
10 - 5.2 Specification
11 - 6 Temperatures
11 - 6.1 General
11 - 6.2 Temperature limitation
11 - 6.3 Determination of the limiting temperature
12 - 7 Constructional requirements
12 - 7.1 General
12 - 7.2 Determination of faults
14 - 7.3 Free space in the encapsulation
15 - 7.4 Thickness of the compound
20 - 7.5 Switching contacts
20 - 7.6 External connections
20 - 7.7 Protection of bare live parts
21 - 7.8 Cells and batteries
23 - 7.9 Protective devices
24 - 8 Type tests
24 - 8.1 Tests on the compound – water absorption test
24 - 8.2 Tests on the apparatus
28 - 9 Routine verifications and tests
28 - 9.1 Visual inspections
28 - 9.2 Dielectric strength test
28 - 10 Marking
29 - Annex A (informative) Basic requirements for compounds for “m” apparatus
30 - Annex B (normative) Allocation of test samples
31 - Annex C (normative) Test procedure during thermal cycling test

Specifies requirements for the construction, testing and marking of electrical apparatus, parts of electrical apparatus and Ex components with the type of protection encapsulation ‘m’. This part of AS/NZS 60079 only applies for encapsulated electrical apparatus, encapsulated parts of electrical apparatus and encapsulated Ex components where the rated voltage does not exceed 10 kV with a relative tolerance of +10 percent. This Standard supplements the general requirements in AS/NZS 60079.0. It is identical with and has been reproduced from IEC 60079-18:2004.

Originated as AS 2431-1981.
Jointly revised and redesignated as AS/NZS 60079.18:2005.