EN 61234-1:1994

SLOVENSKI STANDARD
01-junij-1998
Method of test for the hydrolytic stability of electrical insulating materials - Part 1:
Plastic films (IEC 61234-1:1994)
Method of test for the hydrolitic stability of electrical insulating materials -- Part 1: Plastic
films
Prüfverfahren für die Hydrolysebeständigkeit von Elektroisolierstoffen -- Teil 1:
Kunstoffolien
Méthode d'essai pour la stabilité hydrolytique des matériaux isolants électriques -- Partie
1: Films en matière plastique
Ta slovenski standard je istoveten z: EN 61234-1:1994
ICS:
29.035.20 3ODVWLþQLLQJXPHQLL]RODFLMVNL Plastics and rubber insulating
PDWHULDOL materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
















CEI
NORME
IEC
INTERNATIONALE
1234-1
INTERNATIONAL
Première édition
STANDARD First edition
1994-03
Méthode d'essai pour la stabilité hydrolytique
des matériaux isolants électriques
Partie 1:
Films en matière plastique
Method of test for the hydrolytic stability
of electrical insulating materials
Part 1:
Plastic films
de reproduction réservés — Copyright — all rights reserved
© CEI 1994 Droits
No part of this publication may be reproduced or utilized in
Aucune partie de cette publication ne peut être reproduite ni
any form or by any means, electronic or mechanical,
utilisée sous quelque forme que ce soit et par aucun pro-
including photocopying and microfilm, without permission
cédé, électronique ou mécanique, y compris la photocopie et
in writing from the publisher.
les microfilms, sans l'accord écrit de l'éditeur.
Genève, Suisse
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembè
CODE PRIX
Commission Electrotechnique Internationale
International Electrotechnical Commission H
PRICE CODE
IEC McNNutyHapoAHae 3neKTpoTe%HN4ecKaa HOMHCCNN
catalogue en vigueur
Pour prix, voir •
•
For price, see current catalogue

- 3 -
1234-1 ©IEC:1994
INTERNATIONAL ELECTROTECHNICAL COMMISSION
METHOD OF TEST FOR THE HYDROLYTIC STABILITY
OF ELECTRICAL INSULATING MATERIALS
Part 1: Plastic films
FOREWORD
The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
1)
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
Their preparation is entrusted to technical committees; any IEC National Committee interested in
the subject dealt with may participate in this preparatory work. International, governmental and
non -governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations.
The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on
2)
special interest therein are represented, express, as nearly as
which all the National Committees having a
possible, an international consensus of opinion on the subjects dealt with.
They have the form of recommendations for international use published in the form of standards, technical
3)
reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
International Standard IEC 1234-1 has been prepared by sub-committee 15A: Short-time
tests, of IEC technical committee 15: Insulating materials.
The text of this standard is based on the following documents:
Report on Voting
DIS
15A(CO)67 15A(CO)69
Full information on the voting for the approval of this standard can be found in the report
on voting indicated in the above table.
IEC 1234 consists of the following parts, under the general title: Method of test for the
hydrolytic stability of electrical insulating materials:
Part 1: Plastic films.
Other parts are under consideration.

1234-1 © I EC:1994 - 5 -
INTRODUCTION
This part of IEC 1234 is one of a series which deals with tests for the determination of
hydrolytic stability of solid insulating materials. Part 1 describes the method of test for
plastic films. This test method investigates the combined effect of water and elevated
temperature in appropriate vessels, but does not impose any mechanical stress on the test
specimens during their immersion in water. A test for assessing the effect of mechanical
stress during immersion in water at high temperature will be recommended later.
In addition, it is intended to publish other parts in this series, detailing methods of test for
rigid materials, laminates and varnishes.

1234-1 © I EC:1994 - 7 -
METHOD OF TEST FOR THE HYDROLYTIC STABILITY
OF ELECTRICAL INSULATING MATERIALS
Part 1: Plastic films
1 Scope
rt of IEC 1234 describes the method of test for the determination of the hydrolytic
This pa
stability of plastic films subjected to the simultaneous influence of water and temperature.
With this test method, the irreversible changes of the mechanical and electrical properties
are measured. The test method is applicable to films up to 250 p.m thick.
Although this method was developed for electrically insulating plastic films, as specified,
for example, in the series of IEC 674, it may be appropriate for other types of plastic films.
2 Normative references
The following normative documents contain provisions which, through reference in this
of IEC 1234. At the time of publication, the edition
text, constitute provisions of this pa rt
rties to
indicated was valid. All normative documents are subject to revision, and pa
of IEC 1234 are encouraged to investigate the possibility of
agreement based on this part
applying the most recent editions of the normative documents indicated below. Members
of IEC and ISO maintain registers of currently valid International Standards.
rt 1:
Methods of test for electric strength of solid insulating materials - Pa
IEC 243-1: 1988,
Tests at power frequencies
Specification for unused mineral insulating oils for transformers and
IEC 296: 1982,
switchgear
Amendment 1 (1986)
IEC
...