I.S. EN 60255-149:2013
Current
The latest, up-to-date edition.
MEASURING RELAYS AND PROTECTION EQUIPMENT - PART 149: FUNCTIONAL REQUIREMENTS FOR THERMAL ELECTRICAL RELAYS (IEC 60255-149:2013 (EQV))
Hardcopy , PDF
English
01-01-2013
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Specification of the function
5 Performance specification
6 Functional test methodology
7 Documentation requirements
Annex A (informative) - Simple first-order thermal
model of electrical equipment
Annex B (informative) - Thermal electrical relays
which use temperature as setting parameters
Bibliography
Annex ZA (normative) - Normative references to
international publications with their
corresponding European publications
Defines a common and reproducible reference for evaluating dependent time relays which protect equipment from thermal damage by measuring a.c. current flowing through the equipment.
| DevelopmentNote |
Supersedes I.S. EN 60255-8. (10/2013) For CENELEC adoptions of IEC publications, please check www.iec.ch to be sure that you have any corrigenda that may apply. (01/2017)
|
| DocumentType |
Standard
|
| Pages |
52
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| IEC 60255-149:2013 | Equivalent |
| BS EN 60255-149:2013 | Equivalent |
| EN 60255-149:2013 | Identical |
| UNE-EN 60255-149:2013 | Equivalent |
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