Test procedure for thermal endurance of insulating varnishes - Electric strength method

Gives a method for determining the relative thermal endurance of electrical insulating varnishes by means of coating on glass cloth and measuring electric strength before and after heat ageing for establishing temperature indices to assist in determining suitability of electrical insulating varnishes for use in electrical systems.

Prüfverfahren zur Beurteilung des thermischen Langzeitverhaltens von Isolierlacken - Verfahren zur Prüfung der elektrischen Durchschlagfestigkeit

Méthode d'essai pour l'évaluation de la stabilité thermique des vernis isolants par l'abaissement de la rigidité diélectrique

Détermine la stabilité thermique relative des vernis isolants électriques en les recouvrant d'un tissu de verre et en mesurant la rigidité diélectrique avant et après le vieillissement par la chaleur pour déterminer l'aptitude à l'emploi des vernis isolants électriques destinés aux systèmes électriques.

Test procedure for thermal endurance of insulating varnishes - Electric strength method (IEC 60370:1971)

General Information

Status
Withdrawn
Publication Date
17-Jul-1990
Drafting Committee
Parallel Committee
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
04-Nov-2020

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HD 570 S1:1998
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SLOVENSKI STANDARD
SIST HD 570 S1:1998
01-oktober-1998
Test procedure for thermal endurance of insulating varnishes - Electric strength
method (IEC 60370:1971)
Test procedure for thermal endurance of insulating varnishes - Electric strength method
Prüfverfahren zur Beurteilung des thermischen Langzeitverhaltens von Isolierlacken -
Verfahren zur Prüfung der elektrischen Durchschlagfestigkeit
Méthode d'essai pour l'évaluation de la stabilité thermique des vernis isolants par
l'abaissement de la rigidité diélectrique
Ta slovenski standard je istoveten z: HD 570 S1:1990
ICS:
29.035.01 Izolacijski materiali na Insulating materials in
splošno general
SIST HD 570 S1:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST HD 570 S1:1998

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SIST HD 570 S1:1998

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SIST HD 570 S1:1998

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SIST HD 570 S1:1998
NORME
CEI
INTERNATIONALE
IEC
60370
INTERNATIONAL
Première édition
STAN DARD
First edition
1971-01
Méthode d'essai pour l'évaluation de la
stabilité thermique des vernis isolants
par l'abaissement de la rigidité diélectrique
Test procedure for thermal endurance
of insulating varnishes —
Electric strength method
© IEC 1971 Droits de reproduction réservés —
Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni
No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun
any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo-
including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur.
writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
J
PRICE CODE
International Electrotechnical Commission
IEC
Men Pour prix, voir catalogue en vigueur
• •
For price, see current catalogue

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SIST HD 570 S1:1998
—3—
CONTENTS
Page
5
FOREWORD
5
PREFACE
Clause
1. Introduction 7
2. 9
Test specimen
11
Test apparatus
3.
13
4. Ageing temperatures and times
13
5. Testing procedure
15
6. Calculations
15
7. Report

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SIST HD 570 S1:1998
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
TEST PROCEDURE FOR THERMAL ENDURANCE
OF INSULATING VARNISHES - ELECTRIC STRENGTH METHOD
FOREWORD
The formal decisions or agreements of the I E C on technical matters, prepared by Technical Committees on which all the
1)
National Committees having a special interest therein are represented, express, as nearly as possible, an inte rnational
consensus of opinion on the subjects dealt with.
They have the form of recommendations for international use and they are accepted by the National Committees in that
2)
sense.
3) In order to promote this inte rnational unification, the I E C expresses the wish that all National Committees having as
yet no national rules, when preparing such rules, should use the I E C recommendations as the fundamental basis for these
as national conditions will permit.
rules in so far
4) The desirability is recognized of extending international agreement on these matters through an endeavour to harmonize
as national conditions will permit. The National
national standardization rules with these recommendations in so far
Committees pledge their influence towards that end.
PREFACE
This Recommendation has been prepared by Sub-Committee 15B, Endurance Tests, of I EC Technical
Committee No. 15, Insulating Materials.
A first draft was discussed at the meetings held in Tel Aviv in 1966 and in Warsaw in 1967. As a result
of this latter meeting, a final draft was submitted to the National Committees for approval under the
Six Months' Rule in June 1968. Amendments were submitted to the National Committees for approval
under the Two Months' Procedure in August 1970.
The following countries voted explicitly in favour of publication:
Korea (Republic of)
Australia
Belgium Netherlands
Canada South Africa
Czechoslovakia Sweden
Denmark Switzerland
France Turkey
Israel United States
Italy of America
Japan Yugoslavia

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SIST HD 570 S1:1998
—7—
TEST PROCEDURE FOR THERMAL ENDURANCE
OF INSULATING VARNISHES - ELECTRIC STRENGTH METHOD
1. Introduction
1.1 Scope
This procedure covers a method for determining the relative thermal endurance of electrical insu-
lating varnishes by means of coating on glass cloth and measuring electric strength before and after
heat a
...

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