EXPLOSIVE ATMOSPHERES - PART 11: EQUIPMENT PROTECTION BY INTRINSIC SAFETY 'I'
International Electrotechnical Committee
FOREWORD
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 Supplementary requirements for specific apparatus
10 Type verifications and type tests
11 Routine verifications and tests
12 Marking
13 Documentation
Annex A (normative) - Assessment of intrinsically safe
circuits
Annex B (normative) - Spark test apparatus for intrinsically
safe circuits
Annex C (informative) - Measurement of creepage distances,
clearances and separation distances through casting
compound and through solid insulation
Annex D (normative) - Encapsulation
Annex E (informative) - Transient energy test
Annex F (normative) - Alternative separation distances for
assembled printed circuit boards and separation
of components
Annex G (normative) - Fieldbus intrinsically safe concept
(FISCO) - Apparatus requirements
Annex H (informative) - Ignition testing of semiconductor
limiting power supply circuits
Bibliography
Describes the construction and testing of intrinsically safe apparatus intended for use in an explosive atmosphere and for associated apparatus, which is intended for connection to intrinsically safe circuits which enter such atmospheres.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 31 |
