BS EN 60255-149:2013
Current
The latest, up-to-date edition.
Measuring relays and protection equipment Functional requirements for thermal electrical relays
Hardcopy , PDF
English
31-10-2013
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
Describes minimum requirements for thermal protection relays and includes specification of the protection function, measurement characteristics and test methodologies.
| Committee |
PEL/95
|
| DevelopmentNote |
Supersedes BS EN 60255-8 & 11/30244275 DC. (10/2013)
|
| DocumentType |
Standard
|
| Pages |
50
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
IEC 60255-149:2013 specifies minimum requirements for thermal protection relays. This standard includes specification of the protection function, measurement characteristics and test methodologies. The object is to establish 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. Complementary input energizing quantities such as ambient, coolant, top oil and winding temperature may be applicable for the thermal protection specification set forth in this standard. This standard covers protection relays based on a thermal model with memory function.
| Standards | Relationship |
| IEC 60255-149:2013 | Identical |
| EN 60255-149:2013 | Identical |
| I.S. EN 60255-149:2013 | Equivalent |
| UNE-EN 60255-149:2013 | Equivalent |
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