oSIST prEN IEC 60947-10:2025
(Main)Low-voltage switchgear and controlgear - Part 10: Semiconductor Circuit-Breakers
Low-voltage switchgear and controlgear - Part 10: Semiconductor Circuit-Breakers
Appareillage à basse tension - Partie 10: Disjoncteurs à semi-conducteurs
Nizkonapetostne stikalne in krmilne naprave - 10. del: Polprevodniški odklopniki
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2025
Nizkonapetostne stikalne in krmilne naprave - 10. del: Polprevodniški odklopniki
Low-voltage switchgear and controlgear - Part 10: Semiconductor Circuit-Breakers
Appareillage à basse tension - Partie 10: Disjoncteurs à semi-conducteurs
Ta slovenski standard je istoveten z: prEN IEC 60947-10:2025
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
121A/635/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60947-10 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-01-03 2025-03-28
SUPERSEDES DOCUMENTS:
121A/565/CD, 121A/575A/CC
IEC SC 121A : LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR
SECRETARIAT: SECRETARY:
France Mr Michaël LAHEURTE
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 9, TC 22, SC 22G, TC 23, SC 23E, TC 44, TC 64, TC 69
ASPECTS CONCERNED:
Electromagnetic Compatibility, Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of CENELEC,
is drawn to the fact that this Committee Draft for Vote (CDV) is
submitted for parallel voting.
The CENELEC members are invited to vote through the CENELEC
online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are aware
and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clau ses to be
included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC c lauses. (SEE
AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Low-voltage switchgear and controlgear – Part 10: Semiconductor Circuit-Breakers
PROPOSED STABILITY DATE: 2027
NOTE FROM TC/SC OFFICERS:
SC121A Officers support circulation of CDV for project IEC 60947-10 ED1.
Secretary Note: NC experts are kindly requested to refer their comments to line number.
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
121A/635/CDV 2 IEC CDV 60947-10 © IEC 2024
CONTENTS
FOREWORD . 9
1 Scope . 11
2 Normative references . 11
3 Terms, definitions, symbols and reference clauses . 13
4 Classification . 16
4.1 According to type . 16
4.2 According to the operating mechanism method of the isolation contacts . 16
4.3 According to operation on fault conditions . 16
4.4 According to the method of controlling the operation . 16
4.5 According to the provision for maintenance: . 16
4.6 According to the provision for software upgrade of embedded software . 16
4.7 According to the method of installation. 16
4.8 According to communication method . 16
4.9 According to the behaviour in case of loss of control circuit supply when the
circuit-breaker is in closed position: . 16
4.10 According to the source of control circuit supply . 17
4.10.1 dependent on the main-circuit current (functionally independent of line
voltage or of an external supply) . 17
4.10.2 dependent on line voltage . 17
4.10.3 dependent on an external supply . 17
4.11 According to the degree of protection provided by the enclosure . 17
4.12 According to the direction of current flow and protection . 17
4.12.1 Circuit-breakers protecting in both directions of the current . 17
4.12.2 Circuit-breakers protecting only in one direction of the current, and
preventing current flow in the opposite direction . 17
4.12.3 Circuit-breakers protecting only in one direction of the current, and not
preventing current flow in the opposite direction . 17
4.13 According to the existence of a standby state . 17
4.14 According to the integral cooling method of the breaker . 17
4.15 According to the surge withstand capability . 17
4.16 According to the single-pole voltage rating U for DC applications . 17
e1
4.16.1 Circuit-breakers with each protected pole rated at Ue1 = Ue . 17
4.16.2 Circuit-breakers with each protected pole rated at U < U . 17
e1 e
5 Characteristics of circuit-breaker . 17
5.1 Summary of characteristics . 17
5.2 Type of circuit-breaker . 18
5.3 Rated and limiting values of the main circuit . 18
5.3.1 General . 18
5.3.2 Rated voltages . 18
5.3.3 Currents . 19
5.3.4 Rated frequency . 19
5.3.5 Rated duty . 19
5.3.6 Short-circuit characteristics . 20
5.3.7 Surge withstand capability . 21
5.4 Control circuits . 21
5.5 Auxiliary Circuits . 22
IEC CDV 60947-10 © IEC 2024 – 3 – 121A/635/CDV
5.6 Releases . 22
5.6.1 Release functions . 22
5.6.2 Characteristics . 22
5.6.3 Current setting of over-current releases . 22
5.6.4 Tripping time setting of over-current releases . 23
6 Product information . 23
6.1 Nature of the information . 23
6.2 Marking . 24
6.3 Instructions for installation, operation and maintenance instructions,
decommissioning and dismantling . 24
7 Normal service, mounting and transport conditions . 24
8 Constructional and performance requirements . 24
8.1 Constructional requirements . 24
8.1.1 General . 24
8.1.2 Withdrawable circuit-breakers . 25
8.1.3 Requirements for isolation function . 25
8.1.4 Clearances and creepage distances . 25
8.1.5 Requirements for the safety of the operator . 25
8.1.6 List of construction breaks . 25
8.1.7 Additional requirements for circuit-breakers provided with a neutral pole . 26
8.1.8 Digital inputs and outputs for use with programmable logic controllers
(PLCs) . 26
8.1.9 Indication of the standby state position . 26
8.1.10 Indication of tripping . 26
8.1.11 Fault and abnormal conditions of electronic components . 26
8.1.12 Reliability of the Protective Function . 26
8.2 Performance requirements . 27
8.2.1 Operating conditions . 27
8.2.2 Temperature-rise . 28
8.2.3 Dielectric properties . 29
8.2.4 Ability to make and break under no load, normal load and overload
conditions . 29
8.2.5 Ability to make and break under short-circuit conditions . 30
8.2.6 Requirements for isolation function . 30
8.2.7 Requirements for behaviour in case of loss of control circuit supply . 30
8.3 Electromagnetic compatibility (EMC) . 30
9 Tests . 30
9.1 Kind of tests . 30
9.1.1 General . 30
9.1.2 Type tests. 30
9.1.3 Routine tests . 30
9.1.4 Special tests . 31
9.2 Compliance with constructional requirements . 31
9.2.1 General . 31
9.2.2 Breakdown of components . 31
9.2.3 Components tests . 31
9.3 Type tests . 32
9.3.1 General . 32
9.3.2 Test sequences . 32
9.3.3 General test conditions . 33
121A/635/CDV 4 IEC CDV 60947-10 © IEC 2024
9.3.4 Test sequence I: General performance characteristics . 40
9.3.5 Test sequence II: Rated short-circuit breaking capacity . 51
9.3.6 Test sequence III: Rated individual pole ultimate short-circuit breaking
capacity at phase-to-neutral AC voltage . 52
9.3.7 Test sequence IV: Maximum admissible short-circuit current rate of rise. 53
9.3.8 Test sequence V: Additional verifications for circuit-breakers dependent
on line voltage (4.10.2) or on an external voltage (4.10.3) . 54
9.3.9 Test sequence VI: Rated individual pole ultimate short-circuit breaking
capacity at individual pole rated operational voltage Ue1 for DC circuit-
breakers .
...
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