EN IEC 61125:2018

Insulating liquids - Test methods for oxidation stability - Test method for evaluating the oxidation stability of insulating liquids in the delivered state

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.

Isolierflüssigkeiten - Prüfverfahren für die Oxidationsbeständigkeit - Prüfverfahren zur Evaluierung der Oxidationsbeständigkeit von Isolierflüssigkeiten im Anlieferungszustand

Isolants liquides - Méthodes d’essai de la stabilité à l’oxydation - Méthode d’essai pour évaluer la stabilité à l’oxydation des isolants liquides tels que livrés

L'IEC 61125:2018 spécifie une méthode d’essai permettant d’évaluer dans des conditions accélérées la stabilité à l’oxydation des isolants liquides tels que livrés, que des additifs antioxydants soient présents ou non. La durée de l’essai peut différer selon les types d’isolants liquides, et elle est définie dans les normes correspondantes (par exemple, dans l’IEC 60296, l’IEC 61099, l’IEC 62770). La méthode peut être utilisée pour mesurer la période d’induction, l’essai se poursuivant jusqu’à ce que l’acidité volatile dépasse significativement 0,10 mg KOH/g dans le cas des huiles minérales. Cette valeur peut être nettement plus élevée dans le cas des esters liquides. Des méthodes d’essai complémentaires, par exemple celles basées sur l’analyse calorimétrique différentielle par balayage décrites dans l’IEC TR 62036, peuvent également être utilisées comme test de dépistage, mais elles ne font toutefois pas partie du domaine d’application du présent document. Cette deuxième édition annule et remplace la première édition parue en 1992 et l’Amendement 1: 2004. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) modification du titre afin d’inclure les isolants liquides différents des huiles minérales isolantes (hydrocarbures); b) application de la méthode aux isolants liquides tels que livrés; c) l’ancienne méthode C est dorénavant la méthode normative principale; d) actualisation des données de fidélité de la méthode normative principale concernant le facteur de dissipation; e) suppression de l’ancienne méthode A; f) transfert de l’ancienne méthode B dans l’Annexe B; g) une nouvelle méthode d'évaluation de la stabilité à l’oxydation thermique des esters est proposée dans l’Annexe C.

Izolacijske tekočine - Metode za preskušanje oksidacijske stabilnosti - Preskusna metoda za vrednotenje oksidacijske stabilnosti dobavljenih izolacijskih tekočin

V tem dokumentu je opisan način preskušanja za namen vrednotenja oksidacijske stabilnosti izolacijskih tekočin v dostavljenem stanju pod stopnjevanimi pogoji, ne glede na to, ali so prisotni antioksidativni dodatki ali ne. Trajanja preskusa se lahko razlikuje glede na vrsto izolacijske tekočine in je opredeljeno v ustreznih standardih (npr. v standardih IEC 60296, IEC 61099, IEC 62770). Metodo je mogoče uporabljati za merjenje indukcijskega časa, pri čemer se preskus izvaja, dokler v primeru mineralnih olj hlapna kislina ne preseže bistveno 0,10 mg KOH/g. Ta vrednost je lahko bistveno višja v primeru tekočih estrov.
Vzorec izolacijske tekočine se hrani pri 120 °C ob prisotnosti bakrovega katalizatorja v trdnem stanju med prepihovanjem pri stalnem pretoku. Stopnja oksidacijske stabilnosti je ocenjena z merjenjem hlapne kisline, topne kisline, usedlin, faktorja dielektričnega razsipanja ali od časa, potrebnega za nastanek dane količine hlapne kisline (indukcijski čas z zrakom).
V informativnem Dodatku B je opisana metoda preskusa za vrednotenje oksidacijske stabilnosti inhibiranih mineralnih izolacijskih olj v dostavljenem stanju na podlagi merjenja indukcijskega časa s kisikom. Ta metoda je predvidena le za preverjanje kakovosti. Ni nujno, da rezultati zagotovijo informacije o vedenju med delovanjem. Vzorec olja se hrani pri 120 °C ob prisotnosti bakrovega katalizatorja v trdnem stanju med prepihovanjem pri stalnem toku kisika. Stopnja oksidacijske stabilnosti je ocenjena na podlagi časa, ki ga olje porabi za tvorjenje določene količine hlapne kisline (indukcijski čas s kisikom). Dodatne kriterije, kot so topne in hlapne kisline, usedline in faktor dielektričnega razsipanja, je tudi mogoče ugotoviti po določenem trajanju.
V informativnem Dodatku C je opisana metoda preskusa, predvidena za simulacijo termo-oksidativnega vedenja estrskih izolacijskih tekočin (plinska faza zraka pri 150 °C za 164 h).
Dodatne preskusne metode, kot so metode, opisane v standardu IEC TR 62036, ki temeljijo na diferenčni dinamični kalorimetriji, je tudi mogoče uporabiti kot presejalne preskuse, a so zunaj obsega tega dokumenta.

General Information

• Status: Published
• Publication Date: 22-Mar-2018
• Withdrawal Date: 15-Feb-2021
• ICS: 29.040.10 - Insulating oils
• Technical Committee: CLC/SR 10 - Fluids for electrotechnical applications
• Drafting Committee: IEC/TC 10 - IEC_TC_10
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 23-Mar-2018
• Completion Date: 23-Mar-2018
• Ref Project: SIST EN IEC 61125:2018 - Insulating liquids - Test methods for oxidation stability - Test method for evaluating the oxidation stability of insulating liquids in the delivered state

Relations

• Replaces: EN 61125:1993/A1:2004 - Unused hydrocarbon-based insulating liquids - Test methods for evaluating the oxidation stability
• Effective Date: 26-Jan-2023
• Replaces: EN 61125:1993 - Unused hydrocarbon-based insulating liquids - Test methods for evaluating the oxidation stability
• Effective Date: 21-Mar-2017

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 61125:2018
01-maj-2018
1DGRPHãþD
SIST EN 61125:1997
SIST EN 61125:1997/A1:2005
,]RODFLMVNHWHNRþLQH0HWRGH]DSUHVNXãDQMHRNVLGDFLMVNHVWDELOQRVWL3UHVNXVQD
PHWRGD]DYUHGQRWHQMHRNVLGDFLMVNHVWDELOQRVWLGREDYOMHQLKL]RODFLMVNLKWHNRþLQ
Insulating liquids - Test methods for oxidation stability - Test method for evaluating the
oxidation stability of insulating liquids in the delivered state
Ta slovenski standard je istoveten z: EN IEC 61125:2018
ICS:
29.040.10 Izolacijska olja Insulating oils
SIST EN IEC 61125:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61125:2018

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SIST EN IEC 61125:2018


EUROPEAN STANDARD EN IEC 61125

NORME EUROPÉENNE

EUROPÄISCHE NORM
March 2018
ICS 29.040.10 Supersedes EN 61125:1993
English Version
Insulating liquids - Test methods for oxidation stability - Test
method for evaluating the oxidation stability of insulating liquids
in the delivered state
(IEC 61125:2018)
Isolants liquides - Méthodes d'essai de la stabilité à Isolierflüssigkeiten - Prüfverfahren für die
l'oxydation - Méthode d'essai pour évaluer la stabilité à Oxidationsbeständigkeit - Prüfverfahren zur Evaluierung der
l'oxydation des isolants liquides tels que livrés Oxidationsbeständigkeit von neuen Isolierflüssigkeiten
(IEC 61125:2018) (IEC 61125:2018)
This European Standard was approved by CENELEC on 2018-02-16. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 61125:2018 E

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SIST EN IEC 61125:2018
EN IEC 61125:2018 (E)
European foreword
The text of document 10/1047/FDIS, future edition 2 of IEC 61125, prepared by IEC/TC 10 "Fluids for
electrotechnical applications" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 61125:2018.

The following dates are fixed:
(dop) 2018-11-16
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-02-16
standards conflicting with the
document have to be withdrawn

This document supersedes EN 61125:1993 and EN 61125:1993/A1:2004.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 61125:2018 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60296 NOTE Harmonized as EN 60296.
IEC 60666 NOTE Harmonized as EN 60666.
IEC 61099 NOTE Harmonized as EN 61099.
IEC 62021-1 NOTE Harmonized as EN 62021-1.
IEC 62770 NOTE Harmonized as EN 62770.
2

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SIST EN IEC 61125:2018
EN IEC 61125:2018 (E)

Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the refere
...