IEC 60898-1:2015/AMD1:2019

IEC 60898-1 ®
Edition 2.0 2019-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Electrical accessories – Circuit-breakers for overcurrent protection
for household and similar installations –
Part 1: Circuit-breakers for a.c. operation

Petit appareillage électrique – Disjoncteurs pour la protection
contre les surintensités pour installations domestiques et analogues –
Partie 1: Disjoncteurs pour le fonctionnement en courant alternatif

IEC 60898-1:2015-03/AMD1:2019-12(en-fr)

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IEC 60898-1 ®
Edition 2.0 2019-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Electrical accessories – Circuit-breakers for overcurrent protection

for household and similar installations –

Part 1: Circuit-breakers for a.c. operation

Petit appareillage électrique – Disjoncteurs pour la protection

contre les surintensités pour installations domestiques et analogues –

Partie 1: Disjoncteurs pour le fonctionnement en courant alternatif

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-7634-1

– 2 – IEC 60898-1:2015/AMD1:2019
© IEC 2019
FOREWORD
This amendment has been prepared by subcommittee 23E: Circuit-breakers and similar
equipment for household use, of IEC technical committee 23: Electrical accessories.
The text of this amendment is based on the following documents:
FDIS Report on voting
23E/1156/FDIS 23E/1157/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
___________
FOREWORD
Add the following paragraph after the sentence "This publication has been drafted in
accordance with the ISO/IEC Directives, Part 2":
The following differing practices of a less permanent nature exist in the countries indicated
below.
– Annex J, Clause J.1: Upper limit of current for use of screwless terminals is 16 A (CZ, DK,
NL and CH; upper limit of current for use of screwless terminals is 30 A (Japan).
– J.3.3: Only universal screwless-type terminals are accepted (AT, BE, CN, DK, DE, ES, FR,
IT, PT, SE and CH).
1 Scope
Replace in the third paragraph "for not being maintained" with "do not require maintenance".
Add, at the end of the fourth paragraph, after "pollution degree 2", the following text "and
overvoltage category III".
Add, after the second paragraph, the following note:
NOTE 1 Additional requirements are necessary for circuit-breakers used in locations having more severe
overvoltage conditions.
© IEC 2019
Add, after the fourth paragraph, the following text:
For an environment with a higher pollution degree, enclosures giving the appropriate degree
of protection are used.
Add, after the tenth paragraph, the following text:
This document does not apply to circuit-breakers for DC operation that are covered by
IEC 60898-3.
Delete paragraph 13: "For an environment […] should be used.".
Renumber the existing note in paragraph 14 "NOTE 2".
2 Normative references
Add the following reference to Clause 2:
IEC 60664-3, Insulation coordination for equipment within low-voltage systems – Part 3: Use
of coating, potting or moulding for protection against pollution
3 Terms and definitions
3.2.13
Replace "operation sequence" by "operating sequence".
Insert the following new terms and definitions:
3.2.15
type test
test of one or more devices made to a certain design to show that the design meets certain
requirements
[SOURCE: IEC 60050-411:1996, 411-53-01, modified – "machines" and "specifications" have
been replaced by "devices" and "requirements", respectively.]
3.2.16
routine test
test to which each individual device is subjected during or after manufacture to ascertain
whether it complies with certain criteria
[SOURCE: IEC 60050-411:1996, 411-53-02, modified – "machine" has been replaced with
"device".]
3.5.14.2
Replace the source text by the following:
[SOURCE: IEC 60947-2:2016, 2.17.1, modified – "in series" has been added.]
3.5.16
Replace, in the definition, "to trip" by "to operate".

– 4 – IEC 60898-1:2015/AMD1:2019
© IEC 2019
5.1 List of characteristics
Replace list items:
– range of instantaneous tripping current (see 4.5 and 5.3.5);
– I²t classification (see 4.6).
with the following:
– range of instantaneous tripping current (see 4.6 and 5.3.5);
– I²t classification (see 4.7).
5.2.4 Rated short-circuit capacity (I )
cn
Replace the reference to "Table 17" in the note, by "Table 18".
5.3.1 Preferred values of rated voltage
Table 1 – Preferred values of rated voltage
Delete NOTE 1 in Table 1 and renumber the other notes accordingly.
5.3.6 Standard values of rated impulse withstand voltage (U )
imp
Replace Table 3 by the following new Table 3:
Table 3 – Rated impulse withstand voltage as a function
of the nominal voltage of the installation
Nominal voltage of the installation
Rated impulse withstand voltage
Single-phase system with mid-
U
Three-phase systems
imp
point earthed
kV
V
V
a b
2,5 120/240
a c
4 230/400 120/240, 240
NOTE 1 For test voltages to check the insulation, see Table 14.
NOTE 2 For test voltages to check the isolation distance across open contacts, see Table 15.
a
The values 3 kV and 5 kV, respectively, are used for verifying the isolating distances across open contacts at
the altitude of 2 000 m (see Table 15).
b
For installation practice in Japan.
c
For installation practice in North American countries.

© IEC 2019
6 Marking and other product information
Add the following new paragraph after NOTE 3:
For rail-mounted circuit-breakers, appropriate rail(s) shall be indicated in the manufacturer's
documentation.
8 Requirements for construction and operation
8.1.3 Clearances and creepage distances (see Annex B)
Replace 8.1.3 by the following new 8.1.3:
8.1.3 Clearances, creepage distances and solid insulation
The minimum required clearances and creepage distances are given in Table 4 which is
based on the circuit-breaker being designed for operating in an environment with pollution
degree 2.
Parts of PCBs connected to live parts and protected against pollution by the use of a type 2
protection according to IEC 60664-3 are exempted from this verification.
The insulating materials are classified into material groups on the basis of their comparative
tracking index (CTI) according to IEC 60664-1.
NOTE 1 The comparative tracking index (CTI) is declared by the manufacturer on the basis of tests carried out on
the insulating material.
NOTE 2 Information on the requirements for design of solid insulation is provided in IEC 60664-1.
For clearances on printed wiring material, footnote 3 in Table F.2 of IEC 60664-1:2007
applies. For creepage distances on printed wiring material, the distances from Table F.4 of
IEC 60664-1:2007 for pollution degree 1 can be applied only if protected with a coating
meeting IEC 60664-3 requirements and tests.

– 6 – IEC 60898-1:2015/AMD1:2019
© IEC 2019
Table 4 – Minimum clearances and creepage distances
e, f
Minimum clearances Minimum creepage distances
mm mm
h
Group IIIa Group II Group I
d
(175 V ≤ CTI < (400 V ≤ CTI < (600 V ≤ CTI)
d d
400 V) 600 V)
e
Rated voltage Working voltage
V V
U
imp
2,5 kV 4 kV 4 kV
Description/item
120/ 120/ 230/ > 25 120 250 400 > 25 120 250 400 > 25 120 250 400
i i i
240 240 400 ≤ 50 ≤ 50 ≤ 50
120 240 230
1. Between live parts
which are
separated when
2,0 4,0 4,0 1,2 2,0 4,0 4,0 0,9 2,0 4,0 4,0 0,6 2,0 4,0 4,0
the main contacts
are in the open
a, j
position
2. Between live parts
of different 1,5 3,0 3,0 1,2 1,5 3,0 4,0 0,9 1,5 3,0 3,0 0,6 1,5 3,0 3,0
a
polarity
3. Between circuits
supplied from
different sources,
3,0 6,0 8,0 3,0 6,0 8,0 3,0 6,0 8,0 3,0 6,0 8,0
one of which
being PELV or
g
SELV
Rated voltage
V
120/ 230/ 120/ 230/ 120/ 230/
240 400 240 400 240 400
4. Between live parts
and
– accessible
surfaces of
operating
means
– screws or other
means for fixing
1,5 3,0 3,0 1,5 4,0 1,5 3,0 1,5 3,0
covers which
have to be
removed when
mounting the
circuit-breaker
– surface on
which the
circuit-breaker
b
is mounted
– screws or other
means for fixing
the circuit-
breaker
– metal covers or
b
boxes
– other
accessible
c
metal parts
– metal frames
supporting
flush-type
circuit-breakers
© IEC 2019
Care should be taken to provide adequate clearances and creepage distances between live parts of different
polarity of circuit-breakers, for example of the plug-in type mounted close to one another. If the surfaces adjacent
to the circuit-breaker do not meet the clearance and creepage distance requirements, appropriate information will
be provided for installation purposes.
NOTE 1 The values given for 400 V are also valid for 440 V.
NOTE 2 The parts of the neutral path, if any, are considered to be live parts.
a
For auxiliary and control contacts the values are given in the relevant standard.
b
The values are doubled if clearances and creepage distances between live parts of the device and the metallic
screen or the surface on which the circuit-breaker is mounted are not dependent on the design of the circuit-
breaker only, so that they can be reduced when the circuit-breaker is mounted in the most unfavourable
condition.
c
Including a metal foil in contact with the surfaces of insulating material which are accessible after installation for
normal use. The foil is pushed into corners, grooves, etc., by means of a straight unjointed test finger according
to 9.6 (see Figure 8).
d
See IEC 60112.
e
Interpolation is allowed in determining creepage distances corresponding to voltage values intermediate to those
listed as working voltage. When interpolating, linear interpolation shall be used and values shall be rounded to
the same number of digits as the values taken from the tables. For determination of creepage distances, see
Annex B.
f
Creepage distances cannot be less than the associated clearances.
g
To cover all different voltages including ELV in an auxiliary contact.
h
For material group IIIb (100 V ≤ CTI < 175 V) the values for material group IIIa multiplied by 1,6 apply.
i
For working voltages up to and including 25 V, reference may be made to IEC 60664-1.
j
The clearance and creepage distances between the metal parts within the arc chamber may be less than 1 mm,
provided that the sum of distances is greater than specified in item 1 of Table 4.

8.1.3.1 Clearances
Compliance as regards item 1 in Table 4 is checked by measurement and by the tests of
9.7.5.4.
The test is carried out with samples not submitted to the humidity treatment described in
9.7.1.
Compliance as regards items 2 and 4 in Table 4 is checked by measurement and, if the
clearances are reduced, by the tests of 9.7.5.2.
The clearances of items 2 and 4 (except for accessible surfaces after installation, see note)
may be reduced provided that the measured clearances are not shorter than the minimum
allowed in IEC 60664-1 for homogenous field conditions. In this case, compliance as regards
items 2 and 4 is always checked by the test of 9.7.5.2.
NOTE An accessible surface after installation means any surface accessible by the user when the circuit-breaker
is installed according to the manufacturer's instructions. The test finger can be applied to determine whether a
surface is accessible or not.
Compliance as regards item 3 in Table 4 is checked by measurement.
8.1.3.2 Creepage distances
Compliance as regards items 1, 2, 3 and 4 of Table 4 is checked by measurement.
NOTE All measurements required in 8.1.3 are carried out in Test sequence A on one sample. Tests according to
9.7.2 to 9.7.5 are carried out in Test sequence B on three samples.
8.1.3.3 Solid insulation
Compliance is checked by the tests according to 9.7.2, 9.7.3, 9.7.4 and 9.7.5, as applicable.

– 8 – IEC 60898-1:2015/AMD1:2019
© IEC 2019
8.1.4.4
Replace in the last paragraph "parts of electronic devices" by "electronic components,
including printed circuit board".
Add at the end of the subclause "Compliance is checked by inspection in accordance with the
manufacturer's declaration.".
8.1.5.1
Replace in the last paragraph "in the standard" by "in this document".
8.1.5.12
Replace "of the tapping screw type" by "the thread cutting type".
Add at the end of the subclause "Compliance is checked by inspection.".
8.1.7.1 General
Replace "the holding in position of which" by "the retention of which".
8.1.7.2 Plug-in type circuit-breakers, the holding in position of which does not depend
solely on their plug-in connection(s)
Replace in the title "the holding in position of which" by "the retention of which".
8.1.7.3 Plug-in type circuit-breakers, the holding in position of which depends solely
on their plug-in connection(s)
Replace in the title "the holding in position of which" by "the retention of which".
Add the following new subclauses:
8.14 Electromagnetic immunity
Circuit-breakers for overcurrent protection for household and similar installations are not
sensitive to normal electromagnetic disturbances and therefore no immunity tests are
required.
8.15 Electromagnetic emission
Electromagnetic disturbances can only be generated by circuit-breakers for overcurrent
protection for household and similar installations during occasional switching or automatic
breaking operations. The duration of the disturbances is of the order of milliseconds.
The frequency, the level and the consequences of these emissions are considered as part of
the normal electromagnetic environment of low-voltage installations. Therefore the
requirements for electromagnetic emissions are deemed to be satisfied and no verification is
necessary.
9.2 Test conditions
Add, after the sixth paragraph, the following text:
"The tightening torques to be applied to the terminal screws are two-thirds of those specified
in Table 11."
and delete the same sentence before Table 10.

© IEC 2019
9.3 Test of indelibility of marking
Add after the first paragraph:
Alternately the following solvent could be used: n-hexane 95 % (Chemical Abstracts Service
Registry Number CAS RN: 110-54-3).
NOTE n-hexane 95 % (Chemical Abstracts Service Registry Number CAS RN: 110-54-3) is available from a
variety of chemical suppliers as a high-pressure liquid chromatography (HPLC) solvent.
Only the mandatory markings of Clause 6 are subjected to this test.
Add in the second paragraph the word "laser" after "moulding,".
9.4 Test of reliability of screws, current-carrying parts and connections
Delete the last two paragraphs of the subclause.
9.5.1
Replace in the second paragraph "These last tests" by "The tests of 9.4 and 9.5".
9.5.2
Replace in the second and third paragraphs "terminal" by "terminals".
9.5.3
Replace in the third paragraph "severed wires" by "severed strands".
Replace the existing 9.7 by the following new 9.7.
9.7 Test of dielectric properties
9.7.1 Resistance to humidity
9.7.1.1 Preparation of the circuit-breaker for test
Parts which can be removed without the aid of a tool are removed and subjected to the
humidity treatment with the main part; spring lids are kept open during this treatment.
Inlet openings, if any, are left open; if knock-outs are provided, one of them is opened.
9.7.1.2 Test conditions
The humidity treatment is carried out in a humidity cabinet containing air with a relative
humidity maintained between 91 % and 95 %.
The temperature of the air in which the sample is placed is maintained within ±1 °C of any
convenient value T between 20 °C and 30 °C.
Before being placed in the humidity cabinet, the sample is brought to a temperature between
T °C and T °C +4 °C.
9.7.1.3 Test procedure
The sample is kept in the cabinet for 48 h.

– 10 – IEC 60898-1:2015/AMD1:2019
© IEC 2019
NOTE A relative humidity between 91 % and 95 % can be obtained by placing in the humidity cabinet a saturated
solution of sodium sulphate (Na SO ) or potassium nitrate (KNO ) in water having a sufficiently large contact
2 4 3
surface with the air.
In order to achieve the specified conditions within the cabinet, it is necessary to ensure
constant circulation of the air within and, in general, to use a cabinet which is thermally
insulated.
9.7.1.4 Condition of the circuit-breaker after the test
After this treatment, the sample shall show no damage within the meaning of this document
and shall withstand the tests of 9.7.2, 9.7.3, 9.7.4, and 9.7.5.2.
9.7.2 Insulation resistance of the main circuit
The circuit-breaker having been treated as specified in 9.7.1 is then removed from the
cabinet.
After an interval between 30 min and 60 min following this treatment, the insulation resistance
+100
is measured 5 s after application of a DC voltage of approximately V, in the following
order:
a) with the circuit-breaker in the open position, between each pair of the terminals which are
electrically connected together when the circuit-breaker is in the closed position, in turn on
each pole;
b) with the circuit-breaker in the closed position, in turn between each pole and the other
poles connected together, electronic components connected between current paths being
disconnected for the test;
c) with the circuit-breaker in the closed position, between all poles connected together and
the frame, including a metal foil or part in contact with the outer surface of the housing of
insulating material but with the terminal areas kept completely free to avoid flashover
between terminals and the metal foil;
d) for circuit-breakers with a metal enclosure having an internal lining of insulating material,
between the frame and a metal foil in contact with the inner surface of the lining of
insulating material including bushings and similar devices.
The measurements in items a), b) and c) are carried out after having connected all auxiliary
circuits to the frame.
The term "frame" includes:
– all accessible metal parts and a metal foil in contact with the surfaces of insulating
material which are accessible after installation as for normal use;
– the surface on which the base of the circuit-breaker is mounted, covered, if necessary,
with a metal foil;
– screws and other devices for fixing the base to its support;
– screws for fixing covers which have to be removed when mounting the circuit-breaker;
– metal parts of operating means referred to in 8.2.
If the circuit-breaker is provided with a terminal intended for the interconnection of protective
conductors, this terminal is connected to the frame.
For the measurements according to items b), c) and d), the metal foil is applied in such a way
that the sealing compound, if any, is effectively tested.
The insulation resistance shall be not less than

© IEC 2019
– 2 MΩ for the measurements according to items a) and b);
– 5 MΩ for the other measurements.
9.7.3 Dielectric strength of the main circuit
After the circuit-breaker has passed the tests of 9.7.2, the test voltage specified is applied for
1 min between the parts indicated in 9.7.2, with electronic components, if any, being
disconnected for the test.
The test voltage shall have a practically sinusoidal waveform, and a frequency between 45 Hz
and 65 Hz.
The source of the test voltage shall be capable of supplying a short-circuit current of at least
0,2 A.
No overcurrent tripping device of the transformer shall operate when the current in the output
circuit is lower than 100 mA.
The values of the test voltage shall be as follows:
– 2 000 V for items a) to c) of 9.7.2;
– 2 500 V for item d) of 9.7.2.
Initially, not more than half the voltage specified in the list above is applied, then it is raised to
the full value within 5 s.
No flashover or breakdown shall occur during the test.
Glow discharges without drop in the voltage are neglected.
9.7.4 Insulation resistance and dielectric strength of auxiliary circuits
Insulation resistance and dielectric strength shall be verified according to the following a), b)
and c).
a) The measurement of the insulation resistance and the dielectric strength tests for the
auxiliary circuits are carried out immediately after the measurement of the insulation
resistance and the dielectric strength tests for the main circuit, under the conditions given
in b) and c) below.
Where electronic components connected to the main circuit in normal service are used,
the temporary connections for test shall be made so that, during the tests, there is no
voltage between the incoming and outgoing sides of the components.
b) The measurements of the insulation resistance are carried out:
– between the auxiliary circuits connected to each other and to the frame;
– between each part of an auxiliary circuit which can be separated from the other parts
in normal service and all the other parts connected together.

+100
For both tests listed under b), a test voltage of 500 V is applied. After this voltage has
been applied for 1 min the insulation resistance shall be not less than 2 MΩ.
c) A substantially sinusoidal voltage at rated frequency is applied for 1 min between the parts
listed under b).
The voltage values to be applied are specified in Table 13.

– 12 – IEC 60898-1:2015/AMD1:2019
© IEC 2019
Table 13 – Test voltage of auxiliary circuits
Rated voltage of Test voltage
auxiliary circuits
(AC or DC)
V V
Greater than Up to and including
0 30 600
30 50 1 000
50 110 1 500
110 250 2 000
250 500 2 500
At the beginning of the test the voltage shall not exceed half the value specified. It is then
increased steadily to the full value within 5 s.
During the test, there shall be no flashover or perforation.
NOTE 1 Discharges which do not correspond to a voltage drop are disregarded.
NOTE 2 In the case of circuit-breakers in which the auxiliary circuit is not accessible for verification of the
requirements given in b), the tests can be made on samples specially prepared by the manufacturer or according to
the manufacturer's instructions.
9.7.5 Verification of impulse withstand voltages (across clearances and across solid
insulation) and of leakage current across open contacts
9.7.5.1 General testing procedure for the impulse withstand voltage tests
The impulses are given by a generator producing positive and negative impulses having a
front time of 1,2 µs, and a time to half-value of 50 µs, the tolerances being as follows:
– ±5 % for the peak value;
– ±30 % for the front time;
– ±20 % for the time to half-value.
For each test, five positive impulses and five negative impulses are applied. The interval
between consecutive impulses being at least 1 s for impulses of the same polarity and being
at least 10 s for impulses of the opposite polarity.
When performing the impulse voltage test on a complete circuit-breaker, the attenuation or
amplification of the test voltage shall be taken into account. It needs to be ensured that the
required value of the test voltage is applied across the terminals of the equipment under test.
The surge impedance of the test apparatus shall have a nominal value of 500 Ω.
When carrying out tests on a circuit-breaker incorporating components across the parts under
test (e.g. surge protective components), an impulse generator with a virtual impedance of 2 Ω
shall be used.
The shape of the impulses is adjusted with the circuit-breaker under test connected to the
impulse generator. For this purpose, appropriate voltage dividers and voltage sensors shall be
used.
For a circuit-breaker incorporating components across the parts under test (e.g. surge
protective components), the shape of the impulses is adjusted without connection of the
circuit-breaker to the impulse generator.

© IEC 2019
Small oscillations in the impulses are allowed provided that their amplitude near the peak of
the impulse is less than 5 % of the peak value.
For oscillations on the first half of the front, amplitudes up to 10 % of the peak value are
allowed.
There shall be no disruptive discharge (sparkover, flashover or puncture) during the tests.
Partial discharges in clearances which do not result in breakdown are disregarded.
9.7.5.2 Verification of clearances with the impulse withstand voltage
If the measurement of clearances of items 2 and 4 of Table 4 does not show any reduced
clearance, this test is not applied.
Where measurements of clearances within the device are not feasible this test may be used
to replace measurements of clearances of items 2 and 4 of Table 4.
The test is carried out on a circuit-breaker fixed on a metal support and being in the closed
position.
The test impulse voltage value shall be as specified in Table 14 in accordance with the rated
impulse voltage of the circuit-breaker as given in Table 3. These values are corrected for
barometric pressure and/or altitude at which the tests are carried out, according to Table 14.
Tests are made applying the impulse voltage:
a) in turn between each pole and the other poles connected together, electronic components
connected between current paths being disconnected for the test.
b) between all poles connected together and the frame including a metal foil or part in
contact with the outer surface of the housing of insulating material but with the terminal
areas kept completely free to avoid flashover between terminals and the metal foil;
c) for circuit-breakers with a metal enclosure having an internal lining of insulating material,
between the frame and a metal foil in contact with the inner surface of the lining of
insulating material, including bushings and similar devices.
NOTE 1 The term "frame" is defined in 9.7.2.
Where applicable, the metal foil is applied in such a way that the sealing compound, if any, is
effectively tested.
There shall be no disruptive discharge. If, however, only one such disruptive discharge
occurs, ten additional impulses having the same polarity as that which caused the disruptive
discharge are applied, the connections being the same as those with which the failure
occurred.
No further disruptive discharge shall occur.
NOTE 2 The expression "disruptive discharge" is used to cover the phenomena associated with the failure of
insulation under electric stress, which include a drop in the voltage and the flowing of current.

– 14 – IEC 60898-1:2015/AMD1:2019
© IEC 2019
Table 14 – Test voltage for verification of impulse withstand voltage
Test voltages at corresponding altitude
Rated impulse
withstand voltage
U AC peak
1,2/50
U
kV
imp
kV
Sea level 200 m 500 m 1 000 m 2 000 m
2,5 2,9 2,8 2,8 2,7 2,5
4 4,9 4,8 4,7 4,4 4,0
9.7.5.3 Verification of leakage currents across open contacts (suitability for isolation)
Each pole of circuit-breakers having been submitted to the tests of 9.12.11.2, or 9.12.11.3, or
9.12.11.4.2 or 9.12.11.4.3 or 9.12.11.4.4 is supplied at a voltage 1,1 times its rated
operational voltage, the circuit-breaker being in the open position.
The leakage current flowing across the open contacts is measured and shall not exceed
2 mA.
9.7.5.4 Verification of resistance of the insulation of open contacts against an impulse
voltage (suitability for isolation)
These tests are not preceded by the humidity treatment described in 9.7.1.
NOTE The tests in 9.7.5.4, as stated in the requirements of 8.1.3, are carried out before those of 9.7.1 on three
samples of Test sequence B.
The test impulse voltage values shall be chosen from Table 15 in accordance with the rated
voltage of the installation for which the circuit-breaker is intended to be used as given in
Table 3. These values are corrected for barometric pressure and/or altitude at which the tests
are carried out, according to Table 15.
Table 15 – Test voltage for verifying the suitability for isolation,
with reference to the rated impulse withstand voltage of the circuit-breakers
and the altitude where the test is carried out
Test voltages at corresponding altitude
Nominal voltage
of the installation
U AC peak
1,2/50
V
kV
Sea level 200 m 500 m 1 000 m 2 000 m
Single-phase system with mid-point
3,5 3,5 3,4 3,2 3,0
a
earthed 120/240
b
Single-phase system 120/240 240 6,2 6,0 5,8 5,6 5,0
Three-phase systems 230/400 6,2 6,0 5,8 5,6 5,0
a
For installation practice in Japan.
b
For installation practice in North American countries.

The series of tests is carried out on a circuit-breaker fixed on a metal support as in normal
use and with the contact in open position.
The impulses are applied between the line terminals connected together and the load
terminals connected together.
There shall be no disruptive discharges during the test.

© IEC 2019
9.9 28-day test
Add, after first paragraph, a note:
NOTE A test voltage of a value less than 30 V can be used, subject to the manufacturer's agreement.
Replace the third and fourth paragraphs by the following text:
During the first period of current flow the temperature of the terminals shall be measured.
During the last period of current flow the temperature-rise of the terminals shall be measured
and it shall not exceed the value measured during the first period of current flow by more than
15 K.
Replace in the penultimate paragraph "after this measurement" by "after the last
measurement".
In the last paragraph, delete the second full stop at the end of the sentence.
Replace in the last paragraph "referred to calibration" by "referred to the calibration".
9.10.1 General
Add after the first paragraph:
If the test is made in a test chamber, it shall be made in still air; the volume of the test
chamber shall be such as not to affect the test results.
9.12.4 Test circuit for short-circuit performance
Replace in the second paragraph "parallel connecting" by "parallel connection".
9.12.9.1 General
Add after the first paragraph, before the note:
A circuit-breaker tested according to 9.12.9.2 does not need to be tested according to
9.12.9.3.
9.12.9.2 Test in free air
Add, at the end of the third paragraph, the following:
In the event that no information is available, two grids, one above and one below the circuit-
breaker, shall be used.
9.12.11.2.1 Test on all circuit-breakers
Delete the word "the" before "higher", in the second line of first paragraph.
9.12.11.3 Test at 1 500 A
Replace the sixth paragraph by the following text:
If the neutral of a four-pole circuit-breaker is not marked by the manufacturer, four samples
are tested using successively a different pole as the neutral.

– 16 – IEC 60898-1:2015/AMD1:2019
© IEC 2019
9.12.12.1 Verifications after the tests at reduced short-circuit currents, at 1 500 A and
at service short-circuit capacity
Replace the first sentence of 9.12.12.1 b):
"b) Dielectric strength tests according to 9.7.3, carried out between 2 h and 24 h after the
short-circuit tests at a voltage of 500 V less than the value prescribed in 9.7.5 and without
previous humidity treatment."
by
"b) Dielectric strength tests according to 9.7.3, carried out between 2 h and 24 h after the
short-circuit tests at a voltage of 500 V less than the value specified in 9.7.3 and without
previous humidity treatment."
9.13.1 Mechanical shock
Introduce the following note after the title:
NOTE The mechanical shock test is intended to test the latching means of the circuit-breaker, not its mounting
means.
9.15 Resistance to abnormal heat and to fire
Replace the tenth paragraph:
"In accordance with the manufacturer […] (see IEC 60695-2-11:2010, Clause 4)"
by
"If it is not possible to perform the test on the complete end product, it is acceptable,
according to IEC 60695-2-11:2014, 4.3, to remove the part under examination in its entirety
and test it separately."
9.16 Test of resistance to rusting
Replace Figure 6 by the following new Figure 6:

© IEC 2019
a) = Calibration of circuit
A = Prospective peak making current
A
= Prospective symmetrical breaking

current (r.m.s. value)
2 2
B
= Applied voltage (r.m.s. value)
2 2 (see 3.5.7)
b) = O or CO operation
A
= Breaking capacity (r.m.s. value)
2 2
A = Making capacity (peak value)
B
= Recovery voltage (r.m.s. value)
(see 3.5.8)
2 2
NOTE The amplitude of the voltage trace, after initiation of the test current, varies according to the relative
positions of the closing device, the adjustable impedances, the voltage sensing devices, and according to the test
diagram.
Figure 6 – Example of short-circuit making or breaking test record in the case
of a single-pole device on single-phase AC
Figure 12
Change the title of Figure 12 to the following:
Figure 12 – Example of mounting of a flush-type circuit-breaker for mechanical impact
test (see 9.13.2)
– 18 – IEC 60898-1:2015/AMD1:2019
© IEC 2019
Annex C – Test sequences and number of samples
Table C.2 – Number of samples for full test procedure
Add footnote reference "g" to Table C.2, with the following footnote text:
g
For four-pole circuit-breakers without dedicated neutral pole, four samples are required for the test in 9.12.11.3.
g
Replace "3" in line "D" of Table C.2 in column "Number of samples" with "3 " and replace "3"
c g
in column "Number of samples for repeated tests " with "3 ".
Annex H – Arrangement for short-circuit test
In the fifth paragraph of Annex H, replace "form" by "from".
Figure H.1 – Test arrangement
Replace the title of Figure H.1 by the following:
Figure H.1 – Example of test arrangement
Replace item 5 in the key to Figure H.1 with the following item 5:
5 Grid (position is given as an example)
Annex J – Particular requirements for circuit-breakers with screwless type
terminals for external copper conductors
Replace Annex J with the following new Annex J:

© IEC 2019
Annex J
(normative)
Particular requirements for circuit-breakers with
screwless-type terminals for external copper conductors
NOTE This annex supplements or modifies the corresponding clauses in this standard. Where this annex states
"addition", "modification" or "replacement", the relevant requirements, test specifications or explanatory matter in
this document are adapted accordingly.
J.1 Scope
This Annex J applies to circuit-breakers within the scope of this document, equipped with
screwless terminals, for current not exceeding 40 A primarily suitable for connecting
unprepared (see J.3.6) copper conductors of cross-section up to 10 mm .
NOTE 1 In CZ, DK, NL and CH the upper limit of current for use of screwless terminals is 16 A.
NOTE 2 In JP the upper limit of current for use of screwless terminals is 30 A.
NOTE 3 The manufacturer can declare in its documentation specific conditions permitting the use of prepared
conductors.
In this Annex J, screwless terminals are referred to as terminals and copper conductors are
referred to as conductors.
J.2 Normative references
Clause 2 applies.
J.3 Terms and definitions
Clause 3 applies with the following exceptions:
Additional terms and definitions:
J.3.1
clamping unit
part of the terminal necessary for mechanical clamping and the electrical connection of the
conductor(s) including the parts which are necessary to ensure correct contact pressure
J.3.2
screwless-type terminal
terminal for the connection and subsequent disconnection obtained directly or indirectly by
means of springs, wedges or the like
Note 1 to entry: Examples are given in Figure J.2.
J.3.3
universal terminal
terminal for the connection and disconnection of all types of conductors (rigid and flexible)
Note 1 to entry: In the following countries, only universal screwless-type terminals are accepted: AT, BE, CN, DK,
DE, ES, FR, IT, PT, SE and CH.

– 20 – IEC 60898-1:2015/AMD1:2019
© IEC 2019
J.3.4
non-universal terminal
terminal for the connection and disconnection of a certain kind of conductor only (e.g.
rigid-solid conductors only or rigid-[solid or stranded] conductors only)
J.3.5
push-wire terminal
non-universal terminal in which the connection is made by pushing-in rigid (solid or stranded)
conductors
J.3.6
unprepared conductor
conductor which has been cut and the insulation of which has been removed over a certain
length for insertion into a terminal
Note 1 to entry: A conductor the shape of which is arranged for introduction into a terminal or of which the strands
can be twisted to consolidate the end, is considered to be an unprepared conductor.
Note 2 to entry: The term "unprepared conductor" means conductor not prepared by soldering of the wire, use of
cable lugs, formation of eyelets, etc., but includes its reshaping before introduction into the terminal or, in the case
of flexible conductor, by twisting it to consolidate the end.
J.4 Classification
Clause 4 applies.
J.5 Characteristics of circuit-breakers
Clause 5 applies.
J.6 Marking and other product information
Clause 6 applies with the following exceptions:
Additional requirements:
Universal terminals:
– no marking.
Non-universal terminals:
– terminals declared for rigid-solid conductors shall be marked by the letters "sol";
– terminals declared for rigid (solid and stranded) conductors shall be marked by the
letter "r";
– terminals declared for flexible conductors shall be marked by the letter "f".
The markings should appear on the circuit-breaker or, if the space available is not sufficient,
on the smallest package unit or in technical information.
An appropriate mar
...