GB 3836.4-2010 Electrical apparatus for explosive gas atmospheres--Part 4:Intrinsic safety (Text of Document is in English) - Beijing translation compay

Contents
1 Scope
2 Normative References
3 Terms and Definitions
4 Grouping and Classification of Intrinsically Safe Apparatus and Associated Apparatus
5 Levels of Protection and Ignition Compliance Requirements of Electrical Apparatus
6 Apparatus Construction
7 Components on Which Intrinsic Safety Depends
8 Infallible Components, Infallible Assemblies of Components and Infallible Connections on Which
Intrinsic Safety Depends
9 Diode Safety Barriers
10 Type Verification and Tests
11 Routine Verifications and Tests
12 Marking
13 Documentation
Appendix A (Normative) Assessment of Intrinsically Safe Circuits
Appendix B (Normative) Spark Test Apparatus for Intrinsically Safe Circuits
Appendix C (Informative) Measurement of Creepage Distances, Clearances and Separation Distances Through Casting Compound and Through Solid Insulation
Appendix D (Informative) Encapsulation
Appendix E (Informative) Transient Energy Test
Appendix F (Normative) Alternative Separation Distances for Assembled Printed Circuit Boards and Separation of Components