IEC 60898-2:2016

IEC 60898-2 ®
Edition 2.0 2016-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical accessories – Circuit-breakers for overcurrent protection for
household and similar installations –
Part 2: Circuit-breakers for AC and DC operation

Petit appareillage – Disjoncteurs pour la protection contre les surintensités pour
installations domestiques et analogues –
Partie 2: Disjoncteurs pour le fonctionnement en courant alternatif et en courant
continu
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IEC 60898-2 ®
Edition 2.0 2016-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical accessories – Circuit-breakers for overcurrent protection for

household and similar installations –

Part 2: Circuit-breakers for AC and DC operation

Petit appareillage – Disjoncteurs pour la protection contre les surintensités pour

installations domestiques et analogues –

Partie 2: Disjoncteurs pour le fonctionnement en courant alternatif et en courant

continu
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-3553-9

– 2 – IEC 60898-2:2016 © IEC 2016
CONTENTS
FOREWORD. 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Classification . 5
5 Characteristics of circuit-breakers . 6
6 Marking and other product information . 7
7 Standard conditions for operation in service . 8
8 Requirements for construction and operation . 8
9 Tests . 9
Annexes . 16
Annex C (normative) Test sequences and number of samples. 16

Figure 6 – Calibration of the test circuit . 14
Figure 18 – Methods of connection of the circuit-breakers in different DC systems . 15

Table 1 – Preferred values of rated voltage . 7
Table 2 – Ranges of instantaneous tripping . 7
Table 7 – Time-current operating characteristics . 9
Table C.1 – Test sequences . 16
Table C.2 – Number of samples for full test procedure . 18

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL ACCESSORIES –
CIRCUIT-BREAKERS FOR OVERCURRENT PROTECTION
FOR HOUSEHOLD AND SIMILAR INSTALLATIONS –

Part 2: Circuit-breakers for AC and DC operation

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60898-2 has been prepared by subcommittee 23E: Circuit-
breakers and similar equipment for household use, of IEC technical committee 23: Electrical
accessories.
This second edition cancels and replaces the first edition published in 2000 and
Amendment 1:2003. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with second edition of IEC 60898-1;
b) introduction of test I .
cn1
– 4 – IEC 60898-2:2016 © IEC 2016
The text of this standard is based on the following documents:
FDIS Report on voting
23E/951A/FDIS 23E/976/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.
A list of all parts in the IEC 60898 series, published under the general title Electrical
accessories – Circuit-breakers for overcurrent protection for household and similar
installations, can be found on the IEC website.
This Part 2 is to be used in conjunction with IEC 60898-1.
Where a particular subclause of Part 1 is not mentioned in this Part 2, that subclause applies
as far as is reasonable. Where this Part 2 states “addition”, “deletion” or “replacement”, the
corresponding requirement, test specification or explanatory material in Part 1 should be
adapted accordingly.
In this standard, the following print types are used:
– Requirements proper: in roman type.
– Test specifications: in italic type.
– Explanatory matter: in smaller roman type.
The committee has decided that the contents of this 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.
ELECTRICAL ACCESSORIES –
CIRCUIT-BREAKERS FOR OVERCURRENT PROTECTION
FOR HOUSEHOLD AND SIMILAR INSTALLATIONS –

Part 2: Circuit-breakers for AC and DC operation

1 Scope
Clause 1 of IEC 60898-1:2015 is applicable except as follows:
Addition at the end of the first paragraph:
This standard gives additional requirements for single- and two-pole circuit-breakers which, in
addition to the above characteristics, are suitable for operation with direct current, and have a
rated DC voltage not exceeding 220 V for single-pole and 440 V for two-pole circuit-breakers,
a rated current not exceeding 125 A and a rated DC short-circuit capacity not exceeding
10 000 A.
NOTE This standard applies to circuit-breakers able to make and break both alternating current and direct
current.
Delete the last two paragraphs.
2 Normative references
Clause 2 of IEC 60898-1:2015 is applicable except as follows:
Addition:
IEC 60898-1:2015, Electrical accessories – Circuit-breakers for overcurrent protection for
household and similar installations – Part 1: Circuit-breakers for a.c. operation
3 Terms and definitions
Clause 3 of IEC 60898-1:2015 is applicable except as follows:
Addition:
3.5.10.3
time constant
T
rise time of a prospective direct current to reach a value of 0,63 times the maximum peak
current
T = L/R (ms)
4 Classification
Clause 4 of IEC 60898-1:2015 is applicable except as follows:

– 6 – IEC 60898-2:2016 © IEC 2016
4.2 According to the number of poles:
Replacement:
– single-pole circuit-breakers;
– two-pole circuit-breakers with two protected poles.
4.6 According to the instantaneous tripping current (see 3.5.17)
Delete D-Type.
Addition:
4.8 According to the time constant
– circuit-breakers suitable for DC circuits with a time constant of T ≤ 4 ms;
– circuit-breakers suitable for DC circuits with a time constant of T ≤ 15 ms.
NOTE It is assumed that short-circuit currents of 1 500 A are not exceeded in installations in which, due to the
loads connected, time constants in normal service up to 15 ms can occur. Where higher short-circuit currents can
occur, the time constant of T = 4 ms is considered sufficient.
5 Characteristics of circuit-breakers
Clause 5 of IEC 60898-1:2015 is applicable except as follows:
5.3.1 Preferred values of rated voltage
Replacement:
The preferred values of rated voltage are given in Table 1.
Examples of connections of circuit-breakers in DC systems are given in Figure 18.

Table 1 – Preferred values of rated voltage
b
AC DC
Circuit-breakers AC circuit supplying Rated DC circuit Rated DC wiring
the circuit-breaker AC voltage supplying the DC voltage examples
circuit-breaker
Single-phase Two wires 125 V or
230 V
(phase to neutral) (unearthed system) 220 V
Single-phase (phase to
earthed middle conductor, 120 V – –
Single-pole or phase to neutral) Figure 18a
Single-phase (phase to
neutral) or three-phase
230/400 V – –
(3 single-pole circuit-
breakers) (3-wire or 4-wire)
Single-phase (phase-to- Two wires
400 V 220/440 V
phase) (earthed system)
Figures 18b, 18c,
Two-pole
18d
Single phase (phase-to- Two wires
a a
120/240 V 125/250 V
phase, 3-wire) (earthed system)
Applicable for DC voltages:
a
Also for single-pole circuit-breakers to be used in pairs at 250 V DC (respectively 240 V AC) and individually at
125 V DC (respectively 120 V AC).
b
The rated voltage per pole does not exceed 220 V DC.
Applicable for AC voltages:
NOTE 1 In IEC 60038 the network voltage value of 230/400 V has been standardized. This value progressively
supersedes the values of 220/380 V and 240/415 V.
NOTE 2 Wherever in this standard there is a reference to 230 V or 400 V, it can be read as 220 V or 240 V, and
380 V or 415 V, respectively.
NOTE 3 Circuit-breakers complying with this standard can be used in IT systems.

The manufacturer shall declare in his literature the minimum voltage for which the circuit-
breaker is designed.
Relevant tests are under consideration.
5.3.5 Standard ranges of instantaneous tripping
Replacement:
Table 2 – Ranges of instantaneous tripping
Type Ranges for alternating current Ranges for direct current
B Above 3 I up to and including 5 I Above 4 I up to and including 7 I
n n
n n
C Above 5 I up to and including 10 I Above 7 I up to and including 15 I
n n
n n
6 Marking and other product information
Clause 6 of IEC 60898-1:2015 is applicable except as follows:

– 8 – IEC 60898-2:2016 © IEC 2016
Replacement:
c) rated AC voltage with the symbol (IEC 60417-5032:2002-10) and rated DC voltage
with the symbol (IEC 60417-5031:2002-10).
d) rated current without symbol "A", preceded by the symbol of instantaneous tripping (B or
C), for example B 16;
f) rated short-circuit capacity for AC and DC in amperes in one rectangle, without the symbol
A, if valid for both AC and DC (see Example 1 below). If the rated short-circuit capacity is
different for AC and DC this shall be indicated in two adjacent rectangles, without the
symbol A, with the symbol (IEC 60417-5032:2002-10) near the rectangle containing
the AC value and with the symbol (IEC 60417-5031:2002-10) near the rectangle
containing the DC value (see Example 2 below).
Delete j).
Addition:
m) time constant T15 within a rectangle, if applicable, associated with the marking for the
short-circuit capacity at the time constant of 15 ms (see Example 3 below).
Replacement of the first paragraph following l):
If, for small devices, the space available does not allow all the above data to be marked, at
least the information under c) and d) shall be marked and visible when the circuit-breaker is
installed.
The information under a), b), e), f), g), h), i), l) and m) may be marked on the side or on the
back of the device and be visible only before the device is installed.
Alternatively, the information under g) may be on the inside of any cover which has to be
removed in order to connect the supply wires. Any remaining information not marked shall
be given in the manufacturer’s literature.
EXAMPLE 1 6 000
EXAMPLE 2
10 000
6 000
EXAMPLE 3 1 500 T15
The terminals shall be marked with + or – if necessary. Additionally, arrows indicating the
direction of the current are allowed.
Indications on the possible connection diagrams according to Figure 18 shall be given in the
manufacturer's documentation
7 Standard conditions for operation in service
Clause 7 of IEC 60898-1:2015 applies.
8 Requirements for construction and operation
Clause 8 of IEC 60898-1:2015 is applicable except as follows:

8.6.1 Standard time-current zone
Replacement:
Table 7 – Time-current operating characteristics
Test Type Test Test Initial Limits Result Remarks
current current condition of tripping or to be
AC DC non-tripping time obtained
t ≥ 1 h (I ≤ 63 A)
a
n
a B, C 1,13 I Cold No tripping
n
t ≥ 2 h (I > 63 A)
n
Immediately Current steadily
t < 1 h (I ≤ 63 A)
n
b B, C 1,45 I following Tripping increased within
n
t < 2 h (I > 63 A)
n
test a 5 s
1 s < t < 60 s (I ≤ 32 A)
a
n
c B, C 2,55 I Cold Tripping
n
1 s < t < 120 s (I > 32 A)
n
0,1 < t < 45 s (I ≤ 32 A)
Current
n
B 3 I 4 I
n n 0,1 < t < 90 s (I > 32 A) established by
a
n
d Cold Tripping
closing an
0,1 < t < 15 s (I ≤ 32 A)
C 5 I 7 I
n
n n
auxiliary switch
0,1 < t < 30 s (I > 32 A)
n
Current
B 5 I 7 I
n n established by
a
e Cold t < 0,1 s Tripping
closing an
10 I 15 I
C
n n
auxiliary switch
a
The term "cold" means without previous loading, at the reference calibration temperature.

8.8 Performance at short-circuit currents
Replacement of the third paragraph:
It is required that circuit-breakers be able to make and to break any value of current up to and
including the value corresponding to the rated short-circuit capacity at rated frequency, at a
power-frequency recovery voltage equal to 105 % (±5 %) of the rated operational voltage and
at any power factor not less or any time constant not greater than the appropriate limit of the
2 2
range stated in 9.12.5. It is also required that the corresponding values of I t lie below the I t
characteristic (see 3.5.13).
9 Tests
Clause 9 of IEC 60898-1:2015 is applicable except as follows:
9.2 Test conditions
Addition after the fourth paragraph:
For direct current, the test voltage (current) shall have a ripple of ω ≤ 5 % or have the
minimum instantaneous value of the voltage (current) no lower than the required test voltage
(current) −5 %
9.10.3.1 General test conditions
Replacement of second paragraph:
For the upper values of the test current, the test is made on each protected pole:
– for alternating current, at rated voltage between phase to neutral with a power factor
between 0,95 and 1;
– 10 – IEC 60898-2:2016 © IEC 2016
– for direct current, a time constant of T = 4 ms or, for circuit-breakers marked with T15, a
time constant of T = 15 ms.
9.10.3.2 For circuit-breakers of the B-type
Replacement:
An alternating current equal to 3 I is passed through all poles connected in series, starting
n
from cold. The opening time shall comply with Table 7.
An alternating current equal to 5 I is then passed through each pole separately, starting from
n
cold. The opening time shall comply with Table 7.
A direct current equal to 4 I is passed through all poles connected in series, starting from
n
cold. The opening time shall comply with Table 7.
A direct current equal to 7 I is then passed through each pole separately, starting from cold.
n
The opening time shall comply with Table 7.
9.10.3.3 For circuit-breakers of the C-type
Replacement:
An alternating current equal to 5 I is passed through all poles connected in series, starting
n
from cold. The opening time shall comply with Table 7.
An alternating current equal to 10 I is then passed through each pole separately, starting
n
from cold. The opening time shall comply with Table 7.
A direct current equal to 7 I is passed through all poles connected in series, starting from
n
cold. The opening time shall comply with Table 7.
A direct current equal to 15 I is then passed through each pole separately, starting from cold.
n
The opening time shall comply with Table 7.
9.11.1 General test conditions
Addition after the fourth paragraph:
The direct current shall have a ripple of ω ≤ 5 % and a time constant of T = 4 ms (with a
−10
tolerance of %) or, for circuit-breakers marked with T15, a time constant of T = 15 ms
−10
(with a tolerance of %).
9.11.2 Test procedure
Replacement of the first paragraph:
One set of circuit-breakers is submitted to 4 000 operating cycles at alternating current, and
another set to 1 000 operating cycles at direct current, both at their rated current.

9.12.3 Tolerances and test quantities
Addition:
– ripple ≤ 5 %
−10
– time constant %.
9.12.5 Power factor of the test circuits
Replacement:
9.12.5 Power factor and time constant of the test circuits
Addition:
For DC test currents up to and including 1 500 A, one of the following time constants shall be
used:
T = L / R = 4 ms for devices not marked T15
T = L / R = 15 ms for devices marked T15.
For DC tests currents above 1 500 A and less than or equal to 10 000 A, the tests for all
samples are made at the time constant of T = 4 ms.
NOTE It is assumed that short-circuit currents of 1 500 A are not exceeded in installations in which, due to the
loads connected, time constants in normal service up to 15 ms can occur. Where higher short-circuit currents can
occur, the time constant of T = 4 ms is considered sufficient.
9.12.8 Interpretation of records
Replacement:
9.12.8.1 Interpretation of records in case of AC voltage
a) Determination of the applied and power frequency recovery voltages.
The applied and power frequency recovery voltages are determined from the record
corresponding to the opening operation O, (see 9.12.11.1) made with the apparatus under
test and estimated as indicated in Figure 6a. The voltage on the supply side shall be
measured during the first cycle after arc extinction in all poles and after high frequency
phenomena have subsided.
b) Determination of the prospective short-circuit current.
The AC component of the prospective current is taken as being equal to the r.m.s. value of
the AC component of the calibration current (values corresponding to A of Figure 6a).
Where applicable, the prospective short-circuit current shall be the average of the
prospective currents in all the phases.
9.12.8.2 Interpretation of records in case of DC voltage
a) Determination of the applied voltage and the recovery voltage.
The applied voltage and the recovery voltage are determined from the record taken during
the break test. The voltage on the supply side shall be measured after arc extinction and
after high frequency phenomena have subsided.
b) Determination of the prospective short-circuit current.
NOTE The value of the prospective current is taken as being equal to the maximum value A as determined
from the calibration curve because circuit-breakers according to this standard break the current before it has
reached its maximum value.
The maximum value of the prospective current is indicated as A in Figure 6b.
– 12 – IEC 60898-2:2016 © IEC 2016
Replacement:
9.12.11.2 Tests at reduced short-circuit currents
by
9.12.11.2 Tests at reduced short-circuit currents and at small direct currents
Additional subclauses:
9.12.11.2.3 Tests at reduced DC short-circuit currents
At direct currents the test circuit is adjusted so as to obtain a current of 500 A or 10 × I

n
whichever is the higher, at a time constant corresponding to the assigned time constant.
Each of the protected poles of the circuit-breaker is subjected separately to a test in a circuit,
the connections of which are shown in Figure 3.
The circuit-breaker is caused to open automatically three times, the circuit being closed once
by the auxiliary switch A and twice by the circuit-breaker itself.
The sequence of operations shall be:
O – t – CO – t – CO
After arc extinction, the recovery voltage shall be maintained for a duration not less than
0,1 s.
9.12.11.2.4 Test at small direct currents up to and including 150 A
The circuit-breaker shall be closed three times on to each of the test currents listed below;
during the tests, the operating means is actuated as in normal use. If the circuit-breaker does
not trip, it shall be switched off manually.
Test currents: 1 A, 2 A, 4 A, 8 A, 16 A, 32 A, 63 A, 150 A
The time between each operating cycle CO shall be at least 10 s, the closing time shall not be
longer than 2 s. The time between the various test currents shall be at least 2 min.
The time of the arc extinction during the test shall not exceed 1 s.
9.12.11.3 Test at 1 500 A
Replacement of the first two paragraphs by the following paragraphs:
For circuit-breakers having rated short-circuit capacity of 1 500 A, the test circuit is calibrated
according to 9.12.7.1 and 9.12.7.2, to obtain a current of 1 500 A at a power factor
corresponding to this current according to Table 17.
For direct current the time constant is calibrated corresponding to the assigned time constant.
For circuit-breakers having rated short-circuit capacity exceeding 1 500 A, the test circuit is
calibrated according to 9.12.7.1 and 9.12.7.3, at a power factor corresponding to 1 500 A,
according to Table 17.
For direct current the time constant is calibrated corresponding to the assigned time constant.

Replacement of the eighth paragraph:
The sequence of operations shall be as specified in 9.12.11.2.1 and 9.12.11.2.3.
For single-pole circuit-breakers of rated voltage 230/400 V, the operations for alternating
current are as follows:
Subsequent to the six O operations only two CO operations are performed. In addition, these
circuit-breakers are then tested by performing simultaneously one O operation, with one
circuit-breaker being inserted in each phase of the test circuit for three-pole circuit-breakers.
For this test the auxiliary switch establishing the short-circuit is not synchronized.
9.12.11.4.2 Test at service short-circuit capacity (I )
cs
Replacement of the first paragraph of a):
a) The test circuit is calibrated according to 9.12.7.1 and 9.12.7.3, on alternating current with
a power factor according to Table 17, or on direct current with a time constant according
to 9.12.5.
Addition:
e) In the case of direct current, the test sequence for single- and two-pole circuit-breakers is:
O – t – CO – t – CO
Three operations are made, the circuit being closed once by the auxiliary switch A and twice
by the circuit-breaker.
9.12.11.4.3 Test at rated short-circuit capacity (I )
cn
Replacement of the first paragraph:
a) The test circuit is calibrated according to 9.12.7.1 and 9.12.7.2, on alternating current with
a power factor according to Table 17, or on direct current with a time constant according
to 9.12.5.
Addition:
c) In the case of direct current, the test sequence for single- and two-pole circuit-breakers is:
O – t – CO
Two operations are made, the circuit being closed once by the auxiliary switch A and once by
the circuit-breaker.
9.12.11.4.4 Test at the making and breaking capacity on an individual pole (I ) of
cn1
multipole circuit-breakers
Replacement:
9.12.11.4.4 Performance at rated making and breaking capacity (I ) on individual
cn1
poles of two-pole circuit-breakers
For alternating currents (AC), 9.12.11.4.4 of IEC 60898-1:2015 applies.
Additional tests for direct currents (DC):
The test circuit is calibrated according to 9.12.7.1 and 9.12.7.2 for DC currents with a time
constant according to 9.12.5.
– 14 – IEC 60898-2:2016 © IEC 2016
The test is carried out on each pole according to Figure 3 at a DC voltage equal to 0,5 times
the rated voltage.
The pole which does not carry the short-circuit current during this test shall be connected to
its supply voltage at the corresponding terminals.
The test sequence shall be:
O – t – CO
The two operations shall be carried out first by closing the auxiliary switch T and second by
closing the circuit breaker.
9.12.12 Verification of the circuit-breaker after short-circuit tests
Addition at the end of 9.12.12.2:
The test of 9.12.11.2.4 is repeated but the test currents 63 A and 150 A are omitted.
Figure 6 – Example of short-circuit making or breaking test record in the case of a
single-pole device on single phase a.c.
Renumber Figure 6 as Figure 6a.
Addition:
Prospective peak making current = A
A
Time
IEC
Figure 6b – Calibration of the test circuit in case of direct currents
Figure 6 – Calibration of the test circuit

Current
Addition:
a b c d
Circuit-breaker rated voltage 220 V 125 V 220/440 V 125/250 V 220/440 V 125/250 V 220/440 V 125/250 V
Maximum voltage between the conductors 220 V 125 V 440 V 250 V 440 V 250 V 440 V 250 V
a a
Maximum voltage between conductor and    440 V  250 V 220 V 125 V
earth
Circuit-breaker Single-pole Two-pole Two-pole Two-pole
Distribution system connected to earth No No Yes Yes
Circuit
+ – + –
1 3
1 3
1 1 3
2 4
+ –
2 + 4 –
2 2 4 –
+ +
L+ L–
L+ L– M
L+ L– L+ L–
IEC
IEC
IEC IEC
a
For applications with an earthed negative pole, where the voltage to earth is higher than the rated voltage of a single-pole circuit-breaker.
Figure 18 – Methods of connection of the circuit-breakers in different DC systems

–
+
+ –
–
+
– 16 – IEC 60898-2:2016 © IEC 2016
Annexes
The annexes of IEC 60898-1:2015 are applicable, except as follows:

Annex C
(normative)
Test sequences and number of samples
Annex C of IEC 60898-1:2015 applies with the following modifications:
Replacement:
Table C.1 – Test sequences
Clause or Test (or inspection)
Test sequence
subclause
6 Marking
8.1.1 General
8.1.2 Mechanism
9.3 Indelibility of marking
8.1.3 Clearances and creepage distances (external parts only)
8.1.6 Non-interchangeability
Reliability of screws, current-carrying parts and
A
1 9.4
connections
Reliability of screw-type terminals for external copper
9.5
conductors
9.6 Protection against electric shock
8.1.3 Clearances and creepage distances (internal parts only)
9.14 Resistance to heat
9.16 Resistance to rusting
A 9.15 Resistance to abnormal heat and to fire
Verification of resistance of the insulation of open contacts
9.7.5.4 and basic insulation against an impulse voltage in normal
conditions
9.7.1 Resistance to humidity
9.7.2 Insulation resistance of the main circuit
9.7.3 Dielectric strength of the main circuit
B
Insulation resistance and dielectric strength of auxiliary
9.7.4
circuit
Verification of clearances with the impulse withstand
9.7.5.2
voltage
9.8 Temperature rise and power loss
9.9 28-day test
Clause or Test (or inspection)
Test sequence
subclause
Test
performed at
9.11 Mechanical and electrical endurance
9.12.11.2.1 AC Test at reduced AC short-circuit currents
C
9.12.12 Verification of circuit-breaker after short-circuit tests
9.11 Mechanical and electrical endurance
C 9.12.11.2.3 DC Test at reduced DC short-circuit currents
9.12.12 Verification of circuit-breaker after short-circuit tests
Short-circuit test for verifying the suitability of circuit-
9.12.11.2.2
breakers for use in IT systems
C AC
9.12.12 Verification of circuit-breaker after short-circuit tests
9.12.11.2.4 Test at small direct currents up to and including 150 A
C DC
9.12.12 Verification of circuit-breaker after short-circuit tests
D 9.10 AC DC Tripping characteristic
9.13 Mechanical stresses
D
D 9.12.11.3 AC DC Short-circuit performance at 1 500 A
9.12.12 Verification of circuit-breaker after short-circuit tests
9.12.11.4.2 Service short-circuit capacity (I )
cs
E AC DC
9.12.12 Verification of circuit-breaker after short-circuit tests
9.12.11.4.3 Performance at rated short-circuit capacity (I )
cn
E AC DC
E
9.12.12 Verification of circuit-breaker after short-circuit tests
Performance at rated making and breaking capacity (I )
cn1
9.12.11.4.4
on individual poles of two-pole circuit-breaker
E AC DC
9.12.12 Verification of circuit-breaker after short-circuit tests
NOTE With the agreement of the manufacturer, the same samples can be used for more than one sequence.

– 18 – IEC 60898-2:2016 © IEC 2016
Replacement:
Table C.2 – Number of samples for full test procedure
Minimum number of samples
Number of samples for
Number of samples which shall pass
c
repeated tests
Test a b
the tests
sequence
AC DC AC DC AC DC
A 1 1
A 3 2 3
B 3 2 3
e e
C 3 3 2 2 3 3
e
C 3 2  3
C 2
C 3 2 2
e e
D 3 3 2 2 3 3
e
d e d e d
E 3 2 3
3 + 3 2 + 2 3 + 3
e
d e d e d
E 3 2 3
3 + 4 2 + 3 3 + 4
e e
E 3 3 2 2 3 3
a
In total, a maximum of two test sequences may be repeated.
b
It is assumed that a sample which has not passed a test has not met the requirements due to workmanship
or assembly defects which are not representative of the design.
c
In the case of repeated tests, all results shall be acceptable.
d
Supplementary samples in the case of single-pole circuit-breakers of rated voltage 230/400 V.
e
All samples shall meet the test requirements of 9.12.10, 9.12.11.2, 9.12.11.3 and 9.12.11.4 as appropriate.

___________
– 20 – IEC 60898-2:2016 © IEC 2016
SOMMAIRE
AVANT-PROPOS . 21
1 Domaine d'application . 23
2 Références normatives . 23
3 Termes et définitions . 23
4 Classification . 23
5 Caractéristiques des disjoncteurs . 24
6 Marquage et autres informations sur le produit . 25
7 Conditions normales de fonctionnement en service . 26
8 Exigences de construction et de fonctionnement . 26
9 Essais . 27
Annexes . 34
Annexe C (normative) Séquences d'essais et nombre d'échantillons . 34

Figure 6 – Étalonnage du circuit d'essai . 32
Figure 18 – Méthodes de connexion des disjoncteurs dans différents systèmes à
courant continu . 33

Tableau 1 – Valeurs préférentielles de la tension assignée . 25
Tableau 2 – Plages de déclenchement instantané . 25
Tableau 7 – Caractéristiques de fonctionnement temps-courant . 27
Tableau C.1 – Séquences d'essais . 34
Tableau C.2 – Nombre d'échantillons pour la procédure d'essai complète . 36

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
PETIT APPAREILLAGE –
DISJONCTEURS POUR LA PROTECTION CONTRE LES SURINTENSITÉS
POUR INSTALLATIONS DOMESTIQUES ET ANALOGUES –

Partie 2: Disjoncteurs pour le fonctionnement
en courant alternatif et en courant continu

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...