EN 60931-2:1996

SLOVENSKI STANDARD
01-julij-1999
Shunt power capacitors of the non-self-healing type for a.c. systems having a
rated voltage up to and including 1 kV -- Part 2: Ageing test and destruction test
(IEC 60931-2:1995)
Shunt power capacitors of the non-self-healing type for a.c. systems having a rated
voltage up to and including 1 kV -- Part 2: Ageing test and destruction test
Nichtselbstheilende Leistungs-Parallelkondensatoren für Wechselstromanlagen mit einer
Nennspannung bis 1 kV -- Teil 2: Alterungs- und Zerstörungsprüfung
Condensateurs shunt de puissance non autorégénérateurs destinés à être utilisés sur
des réseaux à courant alternatif de tension assignée inférieure ou égale à 1 kV -- Partie
2: Essais de vieillissement, et de destruction
Ta slovenski standard je istoveten z: EN 60931-2:1996
ICS:
31.060.70 0RþQRVWQLNRQGHQ]DWRUML Power capacitors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE
IEC
931-2
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
1995-12
Condensateurs shunt de puissance
non autorégénérateurs destinés à être utilisés
sur des réseaux à courant alternatif de
tension assignée inférieure ou égale à 1 000 V –
Partie 2:
vieillissement et de destruction
Essais de
Shunt power capacitors of the non-self-healing
type for a.c. systems having a rated voltage up to
and including 1 000 V –
Part 2:
Ageing test and destruction test
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931-2 ©I EC:1995
CONTENTS
Page
FOREWORD 5
Clause
SECTION 1: GENERAL
1 Scope 7
2 Normative references 7
SECTION 2: QUALITY REQUIREMENTS AND TESTS
17 Ageing test
18 Self-healing test
19 Destruction test
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931-2 ©I EC:1995
INTERNATIONAL ELECTROTECHNICAL COMMISSION
-HEALING TYPE
SHUNT POWER CAPACITORS OF THE NON-SELF
FOR A.C. SYSTEMS HAVING A
RATED VOLTAGE UP TO AND INCLUDING 1 000 V –
Part 2: Ageing test and destruction test
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 1EC 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, express as nearly as possible an
international consensus of opinion on the relevant subjects since each technical committee has
representation from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the
form of standards, technical reports or guides and they are accepted by the National Committees in that
sense.
In order to promote international unification, IEC National Committees undertake to apply IEC International
4)
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.
The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
5)
equipment declared to be in conformity with one of its standards.
Attention is drawn to the possibility that some of the elements of this International Standard may be the
6)
subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 931-2 has been prepared by IEC by technical committee 33:
Power capacitors.
The text of this standard is based on the following documents:
Report on voting
DIS
33/220/RVD
33/207/DIS
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.
This second edition cancels and replaces the first edition which was issued as a technical
repo rt in 1989. It constitutes a technical revision and now has the status of an Inter-
national Standard.
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931-2 ©IEC:1995
SHUNT POWER CAPACITORS OF THE NON-SELF-HEALING TYPE
FOR A.C. SYSTEMS HAVING A
RATED VOLTAGE UP TO AND INCLUDING 1 000 V —
Part 2: Ageing test and destruction test
Section 1: General
1 Scope
This part of IEC 931 applies to capacitors according to IEC 931-1 and gives the require-
ments for the ageing test and destruction test for these capacitors.
NOTE – The numbering of the clauses and subclauses in this part corresponds to that of IEC 931-1.
2 Normative references
The following normative documents contain provisions which, through reference in this
text, constitute provisions of this part of IEC 931. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and parties to
agreements based on this pa rt of IEC 931 are encouraged to investigate the possibility of
applying the most recent editions of the normative documents indicated below. Members
of IEC and ISO maintain registers of currently valid International Standards.
IEC 241: 1968, Fuses for domestic and similar purposes
IEC 593: 1977, Internal fuses and internal overpressure disconnectors for shunt capacitors
IEC 931-1: 1989, Shunt power capacitors of the non-self-healing type for a.c. system
having a rated voltage up to and including 660 V - Pa rt 1: General - Performance, testing
and rating - Safety requirements - Guide for installation and operation
Amendment No. 1 (1991)
Section 2: Quality requirements and tests
17 Ageing test
17.1 Conditioning
The temperature of the case during the ageing test shall be the highest mean temperature
in 24 h (see IEC 931-1, table 1) plus the difference between the measured temperature of
the case and the cooling air temperature recorded at the end of the thermal stability test
carried out on an identical unit.

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931-2 ©I EC:1995
The two test methods indicated below are intended to ensure that the capacitor case
temperature is maintained constant during the test.
The two methods are considered as being equivalent.
The units that are not sealed shall be tested in air, with forced circulation.
17.1.1 Testing in air with forced circulation
The capacitor unit is mounted in an enclosure in which heated air is circulated with an air
velocity such that temperature variations at any point of the enclosure do not exceed
±2 °C. The sensitive element of the thermostat regulating the temperature in the capacitor
enclosure shall be located on the surface of the capacitor container, three-quarters of the
way up.
The capacitor shall be placed in a ve rtical position with the terminals upright.
When many capacitors are tested together, they shall be placed with sufficient clearance
between them in ord
...