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IEC 60255-149-ed.1.0
Measuring relays and protection equipment - Part 149: Functional requirements for thermal electrical relays
STANDARD published on 30.7.2013
The information about the standard:
Designation standards: IEC 60255-149-ed.1.0
Publication date standards: 30.7.2013
SKU: NS-409272
The number of pages: 93
Approximate weight : 310 g (0.68 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Annotation of standard text IEC 60255-149-ed.1.0 :
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. La CEI 60255-149:2013 specifie les exigences minimales relatives aux relais de protection thermique. Cette norme inclut la specification de la fonction de protection, les caracteristiques de mesure et les methodes dessais. Lobjet est detablir une reference commune et reproductible pour des relais a temps dependant qui protegent un dispositif contre les deteriorations thermiques par la mesure du courant alternatif circulant dans le dispositif. Des grandeurs dalimentation dentree complementaire, telles que la mesure de la temperature ambiante, du liquide de refroidissement, de lhuile isolante, des enroulements, peuvent etre applicables pour la specification de protection thermique definie dans la presente norme. La presente norme couvre les relais de protection bases sur un modele thermique a fonction de memoire.
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