oSIST prEN IEC 60898-3:2023

Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations - Part 3: Circuit-breakers for DC operation (IEC 60898-3:2019)

This part of IEC 60898 applies to DC circuit-breakers, having a DC rated voltage not exceeding 440V, a rated current not exceeding 125 A and a rated short-circuit capacity not exceeding 10 000 A.

Elektrisches Installationsmaterial - Leitungsschutzschalter für Hausinstallationen und ähnliche Zwecke - Teil 3: Leitungsschutzschalter für Gleichstrom (DC) (IEC 60898-3:2019)

Petit appareillage électrique - disjoncteurs pour la protection contre les surintensités pour installations domestiques et analogues - Partie 3: Disjoncteurs pour le fonctionnement en courant continu (IEC 60898-3:2019)

IEC 60898-3:2019 La présente partie de l’IEC 60898 s'applique aux disjoncteurs à courant continu ayant une tension assignée en courant continu ne dépassant pas 440 V, un courant assigné ne dépassant pas 125 A et un pouvoir de coupure assigné ne dépassant pas 10 000 A.
Ces disjoncteurs sont destinés à la protection contre les surintensités des installations de câblage des bâtiments et autres applications analogues; ils sont conçus pour être utilisés par des personnes non averties et pour ne pas exiger de maintenance.
La présente version bilingue (2023-07) correspond à la version anglaise monolingue publiée en 2019-04.
La version française de cette norme n'a pas été soumise au vote.

Električni pribor - Odklopniki za nadtokovno zaščito za gospodinjske in podobne inštalacije - 3. del: Odklopniki za enosmerni tok (IEC 60898-3:2019)

General Information

• Status: Not Published
• Public Enquiry End Date: 29-Sep-2023
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: EPR - Electrical accessories
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 01-Aug-2023
• Due Date: 19-Dec-2023
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: prEN IEC 60898-3:2023 - Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations - Part 3: Circuit-breakers for DC operation

Relations

• Amended By: oSIST prEN IEC 60898-3:2023/oprA1:2023 - Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations - Part 3: Circuit-breakers for DC operation (IEC 60898-3:2019/AMD1:2022)
• Effective Date: 06-Mar-2023
• Amended By: oSIST prEN IEC 60898-3:2023/oprAA:2023 - Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations - Part 3: Circuit-breakers for DC operation
• Effective Date: 06-Mar-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN IEC 60898-3:2023
01-september-2023
Električni pribor - Odklopniki za nadtokovno zaščito za gospodinjske in podobne
inštalacije - 3. del: Odklopniki za enosmerni tok (IEC 60898-3:2019)
Electrical accessories - Circuit-breakers for overcurrent protection for household and
similar installations - Part 3: Circuit-breakers for DC operation (IEC 60898-3:2019)
Elektrisches Installationsmaterial - Leitungsschutzschalter für Hausinstallationen und
ähnliche Zwecke - Teil 3: Leitungsschutzschalter für Gleichstrom (DC) (IEC 60898-
3:2019)
Petit appareillage électrique - disjoncteurs pour la protection contre les surintensités pour
installations domestiques et analogues - Partie 3: Disjoncteurs pour le fonctionnement
en courant continu (IEC 60898-3:2019)
Ta slovenski standard je istoveten z: prEN IEC 60898-3:2023
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
oSIST prEN IEC 60898-3:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 60898-3:2023

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oSIST prEN IEC 60898-3:2023


EUROPEAN STANDARD DRAFT
prEN IEC 60898-3
NORME EUROPÉENNE

EUROPÄISCHE NORM

July 2023
ICS 29.120.50 -
English Version
Electrical accessories - Circuit-breakers for overcurrent
protection for household and similar installations - Part 3: Circuit-
breakers for DC operation
(IEC 60898-3:2019)
Petit appareillage électrique - disjoncteurs pour la protection Elektrisches Installationsmaterial - Leitungsschutzschalter
contre les surintensités pour installations domestiques et für Hausinstallationen und ähnliche Zwecke - Teil 3:
analogues - Partie 3: Disjoncteurs pour le fonctionnement Leitungsschutzschalter für Gleichstrom (DC)
en courant continu (IEC 60898-3:2019)
(IEC 60898-3:2019)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2023-10-20.

The text of this draft consists of the text of IEC 60898-3:2019 (23E/1122/FDIS).

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 77672 Ref. No. prEN IEC 60898-3:2023 E

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oSIST prEN IEC 60898-3:2023
prEN IEC 60898-3:2023 (E)
European foreword
This document (prEN IEC 60898-3:2023) consists of the text of document IEC 60898-3:2019, prepared
by SC 23E "Circuit-breakers and similar equipment for household use" of IEC/TC 23 "Electrical
accessories".
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this document (doa) dor + 6 months
has to be announced at national level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be withdrawn (to be confirmed or
modified when voting)
This document is read in conjunction with prEN IEC 60898-3:2023/prA1:2023 and
prEN IEC 60898-3:2023/prAA:2023.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association, and supports essential requirements
of EU Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an integral part
of prEN IEC 60898-3:2023/prAA:2023.

2

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oSIST prEN IEC 60898-3:2023



IEC 60898-3

®


Edition 1.0 2019-04




INTERNATIONAL



STANDARD



















Electrical accessories – Circuit-breakers for overcurrent protection for

household and similar installations –

Part 3: Circuit-breakers for DC operation


























INTERNATIONAL

ELECTROTECHNICAL


COMMISSION





ICS 29.120.50 ISBN 978-2-8322-6676-2



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


® Registered trademark of the International Electrotechnical Commission

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oSIST prEN IEC 60898-3:2023
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CONTENTS
FOREWORD . 9
1 Scope . 11
2 Normative references . 12
3 Terms and definitions . 12
3.1 Devices . 13
3.2 General terms . 13
3.3 Constructional elements . 15
3.4 Conditions of operation . 18
3.5 Characteristic quantities . 19
3.6 Definitions related to insulation co-ordination . 23
4 Classification . 25
4.1 General . 25
4.2 According to the number of poles . 25
4.3 According to the current direction through the poles. 25
4.4 According to the protection against external influences . 26
4.5 According to the method of mounting . 26
4.6 According to the methods of connection . 26
4.6.1 According to the fixation system . 26
4.6.2 According to the type of terminals . 26
4.7 According to the instantaneous tripping current (see 3.5.18) . 26
5 Characteristics of circuit-breakers. 26
5.1 List of characteristics . 26
5.2 Rated quantities . 27
5.2.1 Rated voltages . 27
5.2.2 Rated direct current (I ) . 27
n
5.2.3 Rated short-circuit capacity (I ) . 27
cn
5.2.4 Rated making and breaking capacity of an individual pole (I ) . 27
cn1
5.3 Standard and preferred values . 28
5.3.1 Preferred values of rated voltage . 28
5.3.2 Preferred values of rated current . 28
5.3.3 Values of rated short-circuit capacity . 28
5.3.4 Standard ranges of instantaneous tripping . 28
5.3.5 Standard value of rated impulse withstand voltage (U ) . 28
imp
6 Marking and other product information . 29
7 Standard conditions for operation in service . 30
7.1 General . 30
7.2 Ambient air temperature range . 30
7.3 Altitude . 31
7.4 Atmospheric conditions . 31
7.5 Conditions of installation . 31
7.6 Pollution degree . 31
8 Requirements for construction and operation . 31
8.1 Mechanical design . 31
8.1.1 General . 31
8.1.2 Mechanism . 31
8.1.3 Clearances and creepage distances (see Annex A) . 33

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8.1.4 Screws, current-carrying parts and connections . 35
8.1.5 Terminals for external conductors . 36
8.1.6 Non-interchangeability . 38
8.1.7 Mechanical mounting of plug-in type circuit-breakers . 39
8.2 Protection against electric shock . 39
8.3 Dielectric properties and isolating capability . 39
8.3.1 General . 39
8.3.2 Dielectric properties . 40
8.3.3 Isolating capability . 40
8.3.4 Dielectric strength at rated impulse withstand voltage (U ) . 40
imp
8.4 Temperature rise . 40
8.4.1 Temperature rise limits . 40
8.4.2 Ambient air temperature . 40
8.5 Uninterrupted duty . 41
8.6 Automatic operation . 41
8.6.1 Standard time-current zone . 41
8.6.2 Conventional quantities . 42
8.6.3 Tripping characteristic . 42
8.7 Mechanical and electrical endurance . 42
8.8 Performance at short-circuit currents and at small DC currents . 43
8.9 Resistance to mechanical shock and impact . 43
8.10 Resistance to heat . 43
8.11 Resistance to abnormal heat and to fire . 43
8.12 Resistance to rusting . 43
8.13 Behaviour in case of making inrush current . 43
8.14 Power loss . 43
8.15 Requirement of small DC currents. 44
9 Tests . 44
9.1 Type tests and test sequences . 44
9.2 Test conditions . 45
9.3 Test of indelibility of marking . 46
9.4 Test of reliability of screws, current-carrying parts and connections . 46
9.5 Tests of reliability of screw-type terminals for external copper conductors. 47
9.6 Test of protection against electric shock . 49
9.7 Test of dielectric properties . 49
9.7.1 Resistance to humidity . 49
9.7.2 Insulation resistance of the main circuit . 50
9.7.3 Dielectric strength of the main circuit . 51
9.7.4 Insulation resistance and dielectric strength of auxiliary circuits. 51
9.7.5 Verification of impulse withstand voltages (across clearances and
across solid insulation) and of leakage current across open contacts . 52
9.8 Test of temperature rise and measurement of power loss . 55
9.8.1 Ambient air temperature . 55
9.8.2 Test procedure . 55
9.8.3 Measurement of the temperature of parts . 55
9.8.4 Temperature rise of a part . 55
9.8.5 Measurement of power loss . 55
9.9 28-day test . 56
9.10 Test of tripping characteristic . 56

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oSIST prEN IEC 60898-3:2023
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9.10.1 General . 56
9.10.2 Test of time-current characteristic . 56
9.10.3 Test of instantaneous tripping, of correct opening of the contacts and of
the trip-free function . 56
9.10.4 Test of effect of single-pole loading on the tripping characteristic of

multipole circuit-breakers . 57
9.10.5 Test of effect of ambient temperature on the tripping characteristic . 58
9.11 Verification of mechanical and electrical endurance . 58
9.11.1 General test conditions . 58
9.11.2 Test procedure . 58
9.11.3 Condition of the circuit-breaker after test . 59
9.12 Short-circuit tests . 59
9.12.1 General . 59
9.12.2 Values of test quantities . 60
9.12.3 Tolerances on test quantities . 60
9.12.4 Test circuit for short-circuit performance . 60
9.12.5 Time constant of the test circuits . 61
2
9.12.6 Measurement and verification of I t and of the peak current (I ) . 62
p
9.12.7 Calibration of the test circuit . 62
9.12.8 Interpretation of records . 62
9.12.9 Condition of the circuit-breaker for test . 62
9.12.10 Behaviour of the circuit-breaker during short-circuit tests . 64
9.12.11 Test procedure . 64
9.12.12 Verification of the circuit breaker after short circuit tests . 67
9.13 Mechanical stresses . 68
9.13.1 Mechanical shock . 68
9.13.2 Resistance to mechanical stresses and impact . 68
9.14 Test of resistance to heat . 71
9.15 Resistance to abnormal heat and to fire . 72
9.16 Test of resistance to rusting . 73
9.17 Verification of the behaviour in case of making inrush current . 73
9.17.1 General . 73
9.17.2 Values of the test quantities. 73
9.17.3 Limit deviations of the test quantities . 74
9.17.4 Test circuit for the determination of the withstand capacity against

making currents . 74
9.17.5 Testing for determination of the withstand capacity against making
currents . 75
Annex A (normative) Determination of clearances and creepage distances . 87
A.1 General . 87
A.2 Orientation and location of a creepage distance . 87
A.3 Creepage distances where more than one material is used . 87
A.4 Creepage distances split by floating conductive part . 87
A.5 Measurement of creepage distances and clearances . 87
Annex B (normative) Test sequences and number of samples necessary to prove

compliance with this document . 92
B.1 Test sequences . 92
B.2 Number of samples to be submitted for full test procedure and acceptance
criteria . 93
B.3 Number of samples to be submitted for simplified test procedure . 94

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Annex C (informative) Co-ordination under short-circuit conditions between a circuit-
breaker and another short-circuit protective device (SCPD) associated in the same
circuit . 97
C.1 General . 97
C.2 Purpose . 97
C.3 General requirements for the co-ordination of a circuit-breaker with another
SCPD . 98
C.3.1 General consideration . 98
C.3.2 Take-over current . 98
C.3.3 Behaviour of C in association with another SCPD . 98
1
C.4 Type and characteristics of the associated SCPD . 98
C.5 Verification of selectivity . 99
C.6 Verification of back-up protection . 99
C.6.1 Determination of the take-over current . 99
C.6.2 Verification of back-up protection . 99
C.6.3 Tests for verification of back-up protection . 100
C.6.4 Results to be obtained . 101
Annex D (informative) Examples of terminals . 105
Annex E (informative) Correspondence between IEC and AWG copper conductors . 108
Annex F (normative) Arrangement for short-circuit test . 109
Annex G (normative) Routine tests . 112
G.1 General . 112
G.2 Tripping tests . 112
G.3 Verification of clearances between open contacts . 112
Annex H (normative) Particular requirements for circuit-breakers with screwless type

terminals for external copper conductors. 113
H.1 Scope . 113
H.2 Normative references . 113
H.3 Terms and definitions . 113
H.4 Classification . 114
H.5 Characteristics of circuit-breakers . 114
H.6 Marking and other product information . 114
H.7 Standard conditions for operation in service . 114
H.8 Requirements for construction and operation . 115
H.8.1 Connection or disconnection of conductors . 115
H.8.2 Dimensions of connectable conductors . 115
H.8.3 Connectable cross-sectional areas . 116
H.8.4 Insertion and disconnection of conductors . 116
H.8.5 Design and construction of terminals . 116
H.8.6 Resistance to ageing . 116
H.9 Tests . 116
H.9.1 Test of reliability of screwless terminals . 116
H.9.2 Tests of reliability of terminals for external conductors: mechanical
strength . 117
H.9.3 Cycling test. 118
H.10 Reference documents . 120
Annex I (normative) Particular requirements for circuit-breakers with flat quick-

connect terminations . 121
I.1 Scope . 121

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I.2 Normative references . 121
I.3 Terms and definitions . 121
I.4 Classification . 122
I.5 Characteristics of circuit-breakers . 122
I.6 Marking and other product information . 122
I.7 Standard conditions for operation in service . 122
I.8 Requirements for construction and operation . 122
I.8.1 Clearances and creepage distances (see Annex A) . 122
I.8.2 Terminals for external conductors . 123
I.9 Tests . 123
I.9.1 Mechanical overload-force . 123
A
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