1 Scope
This part of GB 12476 specifies requirements for the construction and testing of intrinsically safe apparatus intended for use in potentially explosive dust cloud or dust layer environments and for associated apparatus that is intended for connection to intrinsically safe circuits which enter such environments.
This part supplements the general requirements of IEC 61 241-0:2004 except as indicated in Table 1.
Apparatus utilized in systems will meet the requirements of GB 3836.18-2010 Explosive Atmospheres — Part 18: Intrinsically Safe Systems.
If associated apparatus is protected by a type of protection listed in IEC 61241-0:2004 or GB 3836.1-2000 then the requirements of that method of protection together with the relevant parts of IEC 61241:2004 or GB 3836.1-2000 also apply to the associated apparatus. The list of exclusions in Table 1 is directly applicable to associated apparatus intended for use in situations where there is no potentially hazardous atmosphere and in other circumstances should be used in combination with the requirements of the other methods of protection.
Foreword II
Introduction IV
1 Scope
2 Normative References
3 Terms and Definitions
4 Grouping and Classification of Intrinsically Safe Apparatus and Associated Apparatus
5 Categories of Electrical Apparatus
6 Apparatus Construction
7 Components on which intrinsic safety depends
8 Infallible Components, Infallible Assemblies of Components and Infallible Connections
9 Diode Safety Barriers
10 Type Tests
11 Routine Verifications and Tests
12 Marking
13 Documentation
Annex A (Normative)
Annex B (Informative)
Annex C (Normative)
Table 1 Specific applicable clauses of IEC 61241-0:2004
Table 2 Permitted dissipation within a component
