Amendment 1 - Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations - Part 1: Circuit-breakers for a.c. operation

The contents of the corrigendum of March 2020 have been included in this copy.

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

Le contenu du corrigendum de mars 2020 a été pris en considération dans cet exemplaire.

General Information

Status
Published
Publication Date
12-Dec-2019
Current Stage
PPUB - Publication issued
Completion Date
13-Dec-2019
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IEC 60898-1:2015/AMD1:2019 - Amendment 1 - Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations - Part 1: Circuit-breakers for a.c. operation
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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
IEC 60898-1:2015-03/AMD1:2019-12(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
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

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 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.
---------------------- Page: 4 ----------------------
IEC 60898-1:2015/AMD1:2019 – 3 –
© 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".
---------------------- Page: 5 ----------------------
– 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 )
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-
Three-phase systems
imp
point earthed
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.

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).
For installation practice in Japan.
For installation practice in North American countries.
---------------------- Page: 6 ----------------------
IEC 60898-1:2015/AMD1:2019 – 5 –
© 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.
---------------------- Page: 7 ----------------------
– 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
Group IIIa Group II Group I
(175 V ≤ CTI < (400 V ≤ CTI < (600 V ≤ CTI)
d d
400 V) 600 V)
Rated voltage Working voltage
V V
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
400
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
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
SELV
Rated voltage
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
is mounted
– screws or other
means for fixing
the circuit-
breaker
– metal covers or
boxes
– other
accessible
metal parts
– metal frames
supporting
flush-type
circuit-breakers
---------------------- Page: 8 ----------------------
IEC 60898-1:2015/AMD1:2019 – 7 –
© 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.

For auxiliary and control contacts the values are given in the relevant standard.

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.

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).
See IEC 60112.

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.
Creepage distances cannot be less than the associated clearances.
To cover all different voltages including ELV in an auxiliary contact.

For material group IIIb (100 V ≤ CTI < 175 V) the values for material group IIIa multiplied by 1,6 apply.

For working voltages up to and including 25 V, reference may be made to IEC 60664-1.

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.

---------------------- Page: 9 ----------------------
– 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.
---------------------- Page: 10 ----------------------
IEC 60898-1:2015/AMD1:2019 – 9 –
© 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.
---------------------- Page: 11 ----------------------
– 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
500

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
---------------------- Page: 12 ----------------------
IEC 60898-1:2015/AMD1:2019 – 11 –
© 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.
---------------------- Page: 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 inc
...

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