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IEC 60255-149 Ed. 1.0 b:2013

Measuring relays and protection equipment - Part 149: Functional requirements for thermal electrical relays
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IEC 60255-149 Ed. 1.0 b:2013

Measuring relays and protection equipment - Part 149: Functional requirements for thermal electrical relays

PUBLISH DATE 2013
PAGES 98
IEC 60255-149 Ed. 1.0 b:2013
Measuring relays and protection equipment - Part 149: Functional requirements for thermal electrical relays
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.
SDO IEC: International Electrotechnical Commission
Document Number IEC 60255
Publication Date July 1, 2013
Language b - English & French
Page Count 98
Revision Level 1.0
Supercedes
Committee 95
Publish Date Document Id Type View
July 1, 2013 IEC 60255-149 Ed. 1.0 b:2013 Revision
July 1, 2013 Revision