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IEC 61125-ed.2.0
Insulating liquids - Test methods for oxidation stability - Test method for evaluating the oxidation stability of insulating liquids in the delivered state
Translate name
STANDARD published on 12.1.2018
The information about the standard:
Designation standards: IEC 61125-ed.2.0
Publication date standards: 12.1.2018
SKU: NS-805294
The number of pages: 54
Approximate weight : 162 g (0.36 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Annotation of standard text IEC 61125-ed.2.0 :
IEC 61125:2018 describes a test method for evaluating the oxidation stability of insulating liquids in the delivered state under accelerated conditions regardless of whether or not antioxidant additives are present. The duration of the test can be different depending on the insulating liquid type and is defined in the corresponding standards (e.g. in IEC 60296, IEC 61099, IEC 62770). The method can be used for measuring the induction period, the test being continued until the volatile acidity significantly exceeds 0,10 mg KOH/g in the case of mineral oils. This value can be significantly higher in the case of ester liquids. Additional test methods such as those described in IEC TR 62036 based on differential scanning calorimetry can also be used as screening tests, but are out of the scope of this document. This second edition cancels and replaces the first edition published in 1992 and Amendment 1: 2004. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the title has been modified to include insulating liquids different from mineral insulating oils (hydrocarbon); b) the method applies for insulating liquids in the delivered state; c) former Method C is now the main normative method; d) precision data of the main normative method has been updated concerning the dissipation factor; e) former Method A has been deleted; f) former Method B has been transferred to Annex B; g) a new method evaluating the thermo-oxidative behaviour of esters is included in Annex C. LIEC 61125:2018 specifie une methode d’essai permettant d’evaluer dans des conditions accelerees la stabilite a l’oxydation des isolants liquides tels que livres, que des additifs antioxydants soient presents ou non. La duree de l’essai peut differer selon les types d’isolants liquides, et elle est definie dans les normes correspondantes (par exemple, dans l’IEC 60296, l’IEC 61099, l’IEC 62770). La methode peut etre utilisee pour mesurer la periode d’induction, l’essai se poursuivant jusqu’a ce que l’acidite volatile depasse significativement 0,10 mg KOH/g dans le cas des huiles minerales. Cette valeur peut etre nettement plus elevee dans le cas des esters liquides. Des methodes d’essai complementaires, par exemple celles basees sur l’analyse calorimetrique differentielle par balayage decrites dans l’IEC TR 62036, peuvent egalement etre utilisees comme test de depistage, mais elles ne font toutefois pas partie du domaine d’application du present document. Cette deuxieme edition annule et remplace la premiere edition parue en 1992 et l’Amendement 1: 2004. Cette edition constitue une revision technique. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: a) modification du titre afin d’inclure les isolants liquides differents des huiles minerales isolantes (hydrocarbures); b) application de la methode aux isolants liquides tels que livres; c) l’ancienne methode C est dorenavant la methode normative principale; d) actualisation des donnees de fidelite de la methode normative principale concernant le facteur de dissipation; e) suppression de l’ancienne methode A; f) transfert de l’ancienne methode B dans l’Annexe B; g) une nouvelle methode devaluation de la stabilite a l’oxydation thermique des esters est proposee dans l’Annexe C.
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