SIST EN 61302:1998

SLOVENSKI STANDARD
SIST EN 61302:1998
01-junij-1998
Electrical insulating materials - Method to evaluate the resistance to tracking and
erosion - Rotating wheel dip test (IEC 61302:1995)
Electrical insulating materials - Method to evaluate the resistance to tracking and erosion
- Rotating wheel dip test
Elektroisolierstoffe - Prüfverfahren zur Beurteilung des Widerstandes gegen
Kriechwegbildung und Aushöhlung - Zyklische Prüfung
Matériaux isolants électriques - Méthode d'évaluation de la résistance au cheminement
et à l'érosion - Essai au volant rotatif à immersion
Ta slovenski standard je istoveten z: EN 61302:1995
ICS:
29.035.01 Izolacijski materiali na Insulating materials in
splošno general
SIST EN 61302:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61302:1998

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SIST EN 61302:1998

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SIST EN 61302:1998

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SIST EN 61302:1998

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SIST EN 61302:1998

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SIST EN 61302:1998
NORME CEI
INTERNATIONALE IEC
1302
INTERNATIONAL
Première édition
STANDARD
First edition
1995-04
Matériaux isolants électriques —
Méthode d'évaluation de la résistance
au cheminement et à l'érosion —
Essai au volant rotatif à immersion
Electrical insulating materials —
Method to evaluate the resistance
to tracking and erosion —
Rotating wheel dip test
© CEI 1995 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 pro- any form or by any means, electronic or mechanical,
cédé, électronique ou mécanique, y compris la photocopie et including photocopying and microfilm, without permission
les microfilms, sans raccord écrit de l'éditeur. in writing from the publisher.
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For price, see current catalogue

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SIST EN 61302:1998
CEI IEC Publication 1302
Publication 1302 de la
(First edition - 1995)
(Première édition - 1995)
Electrical insulating materials –
Matériaux isolants électriques –
Method to evaluate the resistance
Méthode d’évaluation de la résistance
au cheminement et à l’érosion – to tracking and erosion –
Rotating wheel dip test
Essai au volant rotatif à immersion
During the meeting of SC 15B in June 1995,
Lors de la réunion du SC 15B en juin 1995, il
a été mis en évidence qu’une grave erreur a serious technical error, that had been made
when the draft international standard was
technique avait été commise lors de la
préparation du projet de norme internationale prepared, came to light. It was decided to
publish the present corrigendum.
et que le corrigendum suivant devait être
publié.
C O R R I G E N D U M 1
Page 7
Page 6
1 Scope and object
1 Domaine d’application et objet
Veuillez remplacer Replace the existing first sentence of the
la première phrase exis-
fourth paragraph by the following:
tante du quatrième alinéa par la nouvelle
phrase suivante:
The test conditions described in this
Les conditions de test décrites dans cette
international standard lead to longer failure
norme internationale conduisent à des
times than obtained from other tracking and
temps de défaillance plus longs que ceux
cheminement erosion tests.
obtenus par d’autres tests au
et à l’érosion.
September 1995
Septembre 1995

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SIST EN 61302:1998

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SIST EN 61302:1998
1302 ©IEC:1995 — 3 —
CONTENTS
Page
FOREWORD 5
Clause
1 Scope and object 7
2 Normative reference 9
3 Definitions 9
4 Test specimen 9
11
5 Test apparatus
15
6 Test procedure
15
7 Test results
15
8 Test report
Annexes
Examples of test specimens (figure A.1) and a test apparatus (figures A.2 to A.6)
A
17 that meet the requirements of this standard
25
B Bibliography

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SIST EN 61302:1998
1302 ©IEC:1995 - 5 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
ELECTRICAL INSULATING MATERIALS —
Method to evaluate the resistance to tracking
and erosion — Rotating wheel dip test
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
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.
2) The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
3) They have the form of recommendations for international use published in the form of standards, technical
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 1302 has been prepared by sub-committee 15B: Endurance
tests, of IEC technical committee 15: Insulating materials.
The text of this standard is based on the following documents:
DIS Report on voting
15B(CO)92 15B/ 162/RV D
Full information on the voting for the approval of this standard can be found in the repo rt
on voting indicated in the above table.
Annexes A and B are for information only.

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SIST EN 61302:1998
1302 ©
IEC:1995 - 7 -
ELECTRICAL INSULATING MATERIALS —
Method to evaluate the resistance to tracking
and erosion — Rotating wheel dip test
1 Scope and object
This International Standard describes a method of test for comparing the performance of
insulating materials, when they are exposed intermittently to a liquid contaminant and then
to an a.c. electric stress along their su rface. It should be realized that the test was
developed to compare the resistance to tracking and erosion of materials belonging to one
specific family, so that comparisons between results in different families may not be fully
valid.
The test apparatus uses a rotating wheel on which standard' ) rod- or tube-shaped
specimens, fitted with electrodes at each end, are located around the periphery of the
wheel. The wheel, mounted at a small angle to the horizontal, is rotated slowly so that
the test specimens are repeatedly dipped in a specified salt-water solution (contaminant)
and then withdrawn.
After withdrawal, the solution is allowed to drain or drip from the surface of the test
specimen for a short time before a specified voltage is applied. The voltage causes electri-
cal discharges (tiny arcs, scintillations) across dry areas which develop on the su rface of
the specimens. These discharges may cause surface degradation to progress; until
flashover occurs, or the leakage current exceeds a specified value 2). The time to flash-
over, or to exceed the specified leakage current, and observation of the nature and
severity of degradation are the criteria used to compare materials.
The test conditions are such that materials suitable for use out of doors normally fail within
a few thousand hours. IEC 112 and IEC 587 (see annex B) describe tests of much shorter
duration, on smaller samples, to assess the ability of materials to withstand electric stress
when exposed to liquid contamination on one surface. These tests may rate materials
differently from tests of longer duration. Salt-fog tests (not yet standardized by IEC) are
also in use. Such tests permit comparison of materials in the form in which they will
be
used in service. The test results are then dependent both on the materials used and the
design of the test specimens. Such tests may also evaluate materials differently.
1) Different specimen shapes, dimensions and electrode spacings may be needed in special cases. Results
with such non-standard test specimens shall be used only for comparison with similar specimens.
2) In order to obtain a sufficient acceleration of the degradation process, the test conditions described in this
standard are such as to cause su rface discharges on all insulating materials. Under less severe conditions,
materials show a different ability to resist the formation of surface discharges. An assessment of this ability
would be of considerable practical interest, but no standardized test for this purpose is available at the
present time.

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SIST EN 61302:1998
1302 ©IEC:1995 - 9 -
As the test conditions cause surface discharges on all insulating materials, it is only
necessary to clean the surface of specimens before tests. If specimens are subjected to
any conditioning prior to the test, such as exposure to UV radiation, or to high humidity,
the conditioning procedures should be described in detail.
2 Normative reference
The following normative document contains provisions which, through reference in this
text, constitute provisions of this International Standard. At the time of publication, the edi-
rt
tion indicated was valid. All normative documents are subject to revision, and pa ies to
agreements based on this International Standard are encouraged to investig
...