SIST EN 60252-2:2003
(Main)AC motor capacitors -- Part 2: Motor start capacitors
AC motor capacitors -- Part 2: Motor start capacitors
Applies to motor start capacitors intended for connection to windings of asynchronous motors supplied from a single-phase system having the frequency of the mains. Covers impregnated or unimpregnated metallized motor start capacitors having a dielectric of paper or plastic film, or a combination of both and electrolytic motor start capacitors with non-solid electrolyte, with rated voltages up to and including 660 V.
Wechselspannungsmotorkondensatoren -- Teil 2: Motoranlaufkondensatoren
Condensateurs des moteurs à courant alternatif -- Partie 2: Condensateurs de démarrage de moteurs
S'applique aux condensateurs de démarrage destinés à être raccordés aux enroulements des moteurs asynchrones alimentés par un réseau monophasé dont la fréquence est celle du réseau. Couvre les condensateurs de démarrage métallisés imprégnés ou non, ayant un diélectrique en papier, film plastique ou une combinaison des deux, et les condensateurs électrolytiques de démarrage à électrolyte non solide, pour une tension assignée n'excédant pas 660 V.
AC motor capacitors - Part 2: Motor start capacitors
General Information
Relations
Standards Content (Sample)
SLOVENSKI SIST EN 60252-2:2003
STANDARD
oktober 2003
AC motor capacitors - Part 2: Motor start capacitors
ICS 31.060.70 Referenčna številka
SIST EN 60252-2:2003(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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EUROPEAN STANDARD EN 60252-2
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2003
ICS 31.060.30;31.060.70
English version
AC motor capacitors
Part 2: Motor start capacitors
(IEC 60252-2:2003)
Condensateurs des moteurs Wechselspannungsmotorkondensatoren
à courant alternatif Teil 2: Motoranlaufkondensatoren
Partie 2: Condensateurs de démarrage (IEC 60252-2:2003)
de moteurs
(CEI 60252-2:2003)
This European Standard was approved by CENELEC on 2003-06-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60252-2:2003 E
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EN 60252-2:2003 - 2 -
Foreword
The text of document 33/389/FDIS, future edition 1 of IEC 60252-2, prepared by IEC TC 33, Power
capacitors, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 60252-2 on 2003-06-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2004-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2006-06-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annexes A and ZA are normative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60252-2:2003 was approved by CENELEC as a European
Standard without any modification.
__________
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- 3 - EN 60252-2:2003
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60068-2-6 1995 Environmental testing
+ corr. March 1995 Part 2: Tests - Test Fc: Vibration EN 60068-2-6 1995
(sinusoidal)
1)
IEC 60068-2-14 1984 Part 2: Tests - Test N: Change of EN 60068-2-14 1999
temperature
2)
IEC 60068-2-20 1979 Part 2: Tests - Test T: Soldering HD 323.2.20 S3 1988
IEC 60068-2-21 1999 Part 2-21: Tests - Test U: Robustness EN 60068-2-21 1999
of terminations and integral mounting
devices
IEC 60068-2-78 2001 Part 2-78: Tests - Test Cab: Damp EN 60068-2-78 2001
heat, steady state
3)
IEC 60112 1979 Method for determining the HD 214 S2 1980
comparative and the proof tracking
indices of solid insulating materials
under moist conditions
IEC 60309-1 1999 Plugs, socket-outlets and couplers for EN 60309-1 1999
industrial purposes
Part 1: General requirements
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code) + corr. May 1993
IEC 60695-2-10 2000 Fire hazard testing EN 60695-2-10 2001
Part 2-10: Glowing/hot-wire based test
methods - Glow-wire apparatus and
common test procedure
1)
EN 60068-2-14 includes A1:1986 to IEC 60068-2-14.
2)
HD 323.2.20 S3 includes A2:1987 to IEC 60068-2-20.
3)
HD 214.S2 is superseded by EN 60112:2003, which is based on IEC 60112:2003.
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EN 60252-2:2003 - 4 -
Publication Year Title EN/HD Year
IEC 60695-2-11 2000 Part 2-11: Glowing/hot-wire based test EN 60695-2-11 2001
methods - Glow-wire flammability test
method for end-products
4)
ISO 4046 - Paper, board, pulp and related terms - - -
Vocabulary
4)
Undated reference.
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NORME CEI
INTERNATIONALE IEC
60252-2
INTERNATIONAL
Première édition
STANDARD
First edition
2003-05
Condensateurs des moteurs
à courant alternatif –
Partie 2:
Condensateurs de démarrage
de moteurs
AC motor capacitors –
Part 2:
Motor start capacitors
IEC 2003 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 any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
X
Commission Electrotechnique Internationale PRICE CODE
International Electrotechnical Commission
Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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60252-2 IEC:2003 – 3 –
CONTENTS
FOREWORD . 5
1 General . 9
1.1 Scope and object. 9
1.2 Normative references . 9
1.3 Definitions .11
1.4 Service conditions .15
1.5 Preferred tolerances on capacitance.17
2 Self-healing motor start capacitors.17
2.1 Quality requirements and tests .17
2.2 Overloads .43
2.3 Safety requirements.45
2.4 Marking .49
3 Electrolytic motor start capacitors .49
3.1 Quality requirements and tests .49
3.2 Overloads .71
3.3 Safety requirements.73
3.4 Marking .77
4 Guidance for installation and operation.77
4.1 General .77
4.2 Choice of rated voltage.79
4.3 Checking capacitor temperature .79
4.4 Checking transients .81
4.5 Storage of electrolytic capacitors .81
Annex A (normative) Test voltage .83
Figure 1 – Test apparatus for d.c. conditioning.37
Figure 2 – Test apparatus for a.c. destruction test.37
Figure 3 – Arrangement to produce the variable inductor L in Figure 2 .39
Figure 4 – Test circuit for measurement of capacitance and power factor.57
Table 1 – Type test schedule .21
Table 2 – Test voltages.25
Table 3 – Torque.27
Table 4 – Minimum creepage distances and clearances .47
Table 5 – Type test schedule .53
Table 6 – Test voltages.57
Table 7 – Torque.61
Table 8 – Minimum creepage distances and clearances .75
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60252-2 IEC:2003 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AC MOTOR CAPACITORS –
Part 2: Motor start capacitors
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 co-operation 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 specifications, 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.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60252-2 has been prepared by IEC technical committee 33: Power
capacitors.
The text of this standard is based on the following documents:
FDIS Report on voting
33/389/FDIS 33/391/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 60252 consists of the following parts, under the general title AC motor capacitors:
Part 1: General − Performance, testing and rating − Safety requirements − Guide for
installation and operation
Part 2: Motor start capacitors
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60252-2 IEC:2003 – 7 –
The committee has decided that the contents of this publication will remain unchanged
until 2007. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
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60252-2 IEC:2003 – 9 –
AC MOTOR CAPACITORS –
Part 2: Motor start capacitors
1 General
1.1 Scope and object
This International Standard applies to motor start capacitors intended for connection to
windings of asynchronous motors supplied from a single-phase system having the frequency
of the mains.
This standard covers impregnated or unimpregnated metallized motor start capacitors having
a dielectric of paper or plastic film, or a combination of both and electrolytic motor start
capacitors with non-solid electrolyte, with rated voltages up to and including 660 V.
1.2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60068-2-6:1995, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-14:1984, Environmental testing – Part 2: Tests – Test N: Change of temperature
IEC 60068-2-20:1979, Environmental testing – Part 2: Tests – Test T: Soldering
IEC 60068-2-21:1999, Environmental testing – Part 2-21: Tests – Test U: Robustness of
terminations and integral mounting devices
IEC 60068-2-78:2001, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat,
steady state
IEC 60112:1979, Method for determining the comparative and the proof tracking indices of
solid insulating materials under moist conditions
IEC 60309-1:1999, Plugs, socket-outlets and couplers for industrial purposes – Part 1:
General requirements
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60695-2-10:2000, Fire hazard testing – Part 2-10: Glowing/hot-wire based test methods
– Glow-wire apparatus and common test procedure
IEC 60695-2-11:2000, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products
ISO 4046: Paper, board, pulps and related terms – Vocabulary
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60252-2 IEC:2003 – 11 –
1.3 Definitions
For the purposes of this document, the following definitions apply.
1.3.1
motor running capacitor
power capacitor which, when used in conjunction with an auxiliary winding of a motor, assists
the motor to start and improves the torque under running conditions
NOTE The running capacitor is usually connected permanently to the motor winding and remains in circuit
throughout the running period of the motor. During the starting period, if it is in parallel with the starting capacitor,
it helps to start the motor.
1.3.2
motor starting capacitor
power capacitor which provides a leading current to an auxiliary winding of a motor and which
is switched out of circuit once the motor is running
1.3.3
metal foil capacitor
capacitor, the electrodes of which consist of metal foils or strips separated by a dielectric
1.3.4
metallized capacitor
capacitor, in which the electrodes consist of a metallic deposit on the dielectric
1.3.5
self-healing capacitor
capacitor, the electrical properties of which, after local breakdown of the dielectric, are rapidly
and essentially self-restored
1.3.6
discharge device of a capacitor
device which may be incorporated in a capacitor, capable of reducing the voltage between the
terminals effectively to zero, within a given time, after the capacitor has been disconnected
from a network
1.3.7
continuous operation
operation with no time limit within the normal life of the capacitor
1.3.8
intermittent operation
operation in which periods with the capacitor energized are followed by intervals during which
the capacitor is unenergized
1.3.9
starting operation
special type of intermittent operation in which the capacitor is energized for only a very short
period while the motor is accelerating to rated speed
1.3.10
rated duty cycle
rated value indicating the rate of intermittent or starting duty for which a capacitor is suitable.
It is specified by the duty cycle duration, in minutes, and the percentage of the time during
which the capacitor is energized
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60252-2 IEC:2003 – 13 –
1.3.11
duty cycle duration
total time of one energized and one unenergized interval during the intermittent operation
1.3.12
relative operation time
percentage of the cycle duration in which the capacitor is energized
1.3.13
capacitor for continuous and starting operation
capacitor designed to operate at one voltage when in continuous operation and at a different
(usually higher) voltage when in starting operation
1.3.14
minimum permissible capacitor operating temperature
minimum permissible temperature on the outside of the case at the moment of switching on
the capacitor
1.3.15
maximum permissible capacitor operating temperature (t )
c
maximum permissible temperature of the hottest area of the outside of the capacitor case
during operation
1.3.16
rated voltage of a capacitor (U )
N
r.m.s. value of the alternating voltage for which the capacitor has been designed
1.3.17
maximum voltage
maximum r.m.s. voltage permissible at the starting capacitor terminals between the point of
starting and the instant at which the capacitor is disconnected
1.3.18
rated frequency of a capacitor (f )
N
highest frequency for which the capacitor has been designed
1.3.19
rated capacitance of a capacitor (C )
N
capacitance value for which the capacitor has been designed
1.3.20
rated current of a capacitor (I )
N
r.m.s. value of the alternating current at the rated voltage and frequency
1.3.21
rated output of a capacitor (Q )
N
reactive power derived from the rated values of capacitance, frequency and voltage
(or current)
1.3.22
capacitor losses
active power dissipated by a capacitor
NOTE Unless otherwise stated, the capacitor losses will be understood to include losses in fuses and discharge
resistors forming an integral part of the capacitor.
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60252-2 IEC:2003 – 15 –
1.3.23
tangent of loss angle (tan delta) of a capacitor
ratio between the equivalent series resistance and the capacitive reactance of a capacitor
at specified sinusoidal alternating voltage and frequency
1.3.24
power factor
ratio between the active power and the apparent power of a capacitor
1.3.25
capacitive leakage current (only for capacitors with a metal case)
current flowing through a conductor connecting the metallic case to earth, when the capacitor
is energized from an a.c. supply system with an earthed neutral
1.3.26
type of capacitor
capacitors are considered to be of the same type when of similar constructional form, the
same constructional technology, same rated voltage, same climatic category and same kind of
operation. Capacitors of the same type can differ only in rated capacitance and size. Minor
differences between terminations and mounting devices are permitted
NOTE The same construction includes, for example, the same dielectric material, dielectric thickness and type
of case (metal or plastic).
1.3.27
model of capacitor
capacitors are considered to be of the same model when they are of the same construction
and have the same functional and dimensional characteristics within the tolerance limits and
are consequently interchangeable
1.3.28
class of safety protection
degree of safety protection identified by one of three codes to be marked on the capacitor
(P2) indicates that the capacitor type has been designed to fail in the open-circuit mode
only and is protected against fire or shock hazard. Compliance is verified by the test
described in 2.1.16
(P1) indicates that the capacitor type may fail in the open-circuit or short-circuit mode and
is protected against fire or shock hazard. Compliance is verified by the test described
in 2.1.16
(P0) indicates that the capacitor type has no specific failure protection
This subclause does not apply to electrolytic capacitors.
1.4 Service conditions
1.4.1 Normal service conditions
This standard gives requirements for capacitors intended for use under the following
conditions:
a) altitude: not exceeding 2 000 m;
b) residual voltage at energization: shall not exceed 10 % rated voltage (see notes to 2.3.4
and 3.3.4);
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60252-2 IEC:2003 – 17 –
c) pollution: capacitors included in the scope of this standard are designed for operation in
lightly polluted atmospheres;
NOTE The IEC has not yet established a definition for “lightly polluted”. When this definition is established
by the IEC, it will be incorporated in this standard.
d) operating temperature: between –40 °C and +100 °C (see 1.3.14 and 1.3.15).
The preferred minimum and maximum permissible capacitor operating temperatures are
as follows:
– minimum temperatures: –40 °C, –25 °C, –10 °C and 0 °C;
– maximum temperatures: 55 °C, 70 °C, 85 °C and 100 °C.
Capacitors shall be suitable for transport and storage at temperatures down to –25 °C, or
the minimum operating temperature, whichever is the lower, without adverse effect on
their quality;
e) damp heat severity: between 4 days and 56 days. The preferred severity is 21 days.
(The damp heat severity shall be selected from the values indicated by IEC 60068-2-78,
i.e.: 4 days, 10 days, 21 days and 56 days.)
Capacitors are classified in climatic categories defined by the minimum and maximum
permissible capacitor operating temperatures and damp heat severity: i.e. 10/70/21
indicates that the minimum and the maximum permissible capacitor operating temper-
atures are –10 °C and 70 °C and the damp heat severity is 21 days.
1.5 Preferred tolerances on capacitance
Preferred tolerances are as follows: ±5 %, ±10 % and ±15 %.
Asymmetric tolerances are permitted but no tolerance shall exceed 15 %.
2 Self-healing motor start capacitors
2.1 Quality requirements and tests
2.1.1 Test requirements
2.1.1.1 General
This clause gives the test requirements for self-healing motor start capacitors.
2.1.1.2 Test conditions
Unless otherwise specified for a particular test or measurement, the temperature of the
capacitor dielectric shall be in the range +15 °C to +35 °C and shall be recorded.
If corrections are necessary, the reference temperature shall be +20 °C.
NOTE It may be assumed that the dielectric temperature is the same as the ambient temperature, provided that
the capacitor has been left in an unenergized state at this ambient temperature for an adequate period, depending
on the size of the capacitor.
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60252-2 IEC:2003 – 19 –
2.1.2 Nature of tests
The tests specified are of two sorts:
a) type tests;
b) routine tests.
2.1.2.1 Type tests
Type tests are intended to prove the soundness of the design of the capacitor and its
suitability for operation under the conditions detailed in this standard.
Type tests are carried out by the manufacturer and/or the test authority if there is need for
an approval.
These tests may be carried out under the supervision of a proper authority which will issue
a certified record and/or type approval.
2.1.2.2 Routine tests
Routine tests shall be carried out by the manufacturer on every capacitor before delivery.
2.1.3 Type tests
2.1.3.1 Test procedure
The samples of each model selected for the type tests shall be divided into groups, as
indicated in Table 1.
Capacitors forming the sample shall have successfully passed the routine tests indicated
in 2.1.4.1.
Each test group shall contain equal numbers of capacitors of the highest capacitance and the
lowest capacitance in the range.
The manufacturer shall provide data on the ratio of capacitance per outer total surface area
of the case of each capacitance value in the range.
The capacitor with the maximum capacitance per unit surface area shall also be tested if this
ratio exceeds that of the maximum capacitance value in the range by 10 % or more.
Similarly, the capacitor with the minimum capacitance per unit area shall also be tested if
the ratio is less than that of the minimum capacitance value in the range by 10 % or more.
“Area” denotes total outer surface area of the capacitor case with the exception of small
protrusions, terminals and fixing studs.
2.1.3.2 Extent of qualification
2.1.3.2.1 A type test on a single model qualifies only the model tested. When the type test is
performed on two models of the same type but of different rated capacitance value, selected
under the rules of 2.1.3.1, the qualification is valid for all models of the same type having
rated capacitance between the two tested values.
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60252-2 IEC:2003 – 21 –
2.1.3.2.2 The qualification tests carried out successfully on a capacitor model having a
certain capacitance tolerance are valid also for capacitors of the same model but having
a different capacitance tolerance of up to twice the limits of the declared tolerance. For
example, ±5 % would cover up to ±10 %, and ±10 % would cover up to ±20 %. A smaller
tolerance than the declared tolerance is not permitted. For example, a type approval for
±10 % would not cover ±5 %.
2.1.3.2.3 Occasionally, in current practice, capacitors are required with a capacitance
tolerance that is not symmetrical with respect to the rated capacitance value.
When a type test is carried out successfully on a capacitor model having a symmetrical
capacitance tolerance, the relevant qualification is valid also for capacitors of the same model
having a non-symmetrical capacitance provided that the total range of non-symmetrical
tolerance is
a) within the total range of capacitance allowed in 2.1.3.2.2,
and
b) greater than, or equal to, that of the tested capacitor model. For example, qualification for
+5 +10
+10 +8 +15
±5 would allow values such as %, %, %, % but not %.
−5
−5 −10 −2 0
Table 1 – Type test schedule
Number Number
Number
of samples of failures
of failures
to be allowed in
Group Tests Subclause
allowed
inspected first test
in retest
a b
Visual examination 2.1.6
Check markings 2.4
Check of dimensions 2.1.10
c
1
8 [4] 0
1 Mechanical tests 2.1.11
(excluding soldering)
Sealing tests 2.1.12
(if applicable)
d
2 Endurance test 2.1.13 2
42 [21] 0
Soldering (if applicable) 2.1.11.2
Damp heat test 2.1.14
c
1
12 [6] 0
3 Voltage test between terminals 2.1.7
Voltage test between terminals 2.1.8
and case
c
4 Self-healing test 2.1.15 1
20 [10] 0
(if applicable)
e
5 Destruction test 2.1.16 20 [10] 1
0
(if marked on the capacitor) 10 [5]
6 Resistance to heat, fire and 2.1.17
3
tracking (not applicable to
(terminal
00
capacitors with lead terminations) f
housing only)
a
The number of samples specified allows for retest if required. The number in square brackets indicates the actual
number required for the test. All numbers indicate the sample quantity for each capacitance value tested. If a range
is tested, then the quantity indicated in the table will apply to both the highest capacitance, lowest capacitance or
any other intermediate value required to be tested in the range according to 2.1.3.1.
b
A capacitor which fail
...
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