I.S. EN 60255-151:2009
Current
The latest, up-to-date edition.
MEASURING RELAYS AND PROTECTION EQUIPMENT - PART 151: FUNCTIONAL REQUIREMENTS FOR OVER/UNDER CURRENT PROTECTION
Hardcopy , PDF
English
01-01-2009
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 and object
2 Normative references
3 Terms and definitions
4 Specification of the function
5 Performance specification
6 Functional test methodology
7 Documentation requirements
Annex A (normative) - Constants for dependent time operating
and reset characteristics
Annex B (informative) - Reset time determination for relays
with trip output only
Bibliography
Annex ZA (normative) - Normative references to international
publications with their corresponding European
publications
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