Circuit-breakers for equipment (CBE) (IEC 60934:2019)

This document is applicable to mechanical switching devices designed as "circuit-breakers for equipment" (CBE) for household and similar applications. CBEs according to this document are intended to provide protection to circuits within electrical equipment including its components (e.g. motors, transformers, internal wiring). This document covers also CBEs applicable for protection of electrical equipment in case of undervoltage and/or overvoltage. This document also covers CBEs which are suitable for isolation. CBEs are not applicable for overcurrent protection of wiring installations of buildings. CBEs according to this document have: - a rated voltage not exceeding 440 V AC (between phases) and/or DC not exceeding 250 V; - a rated current not exceeding 125 A; - a short-circuit capacity (Icn) of at least 6 × In (AC types) and 4 × In (DC types) but not exceeding 3 000 A. CBEs may have a conditional short-circuit current (Inc) rating in association with a specified short-circuit protective device (SCPD). A guide for coordination of a CBE associated in the same circuit with a SCPD is given in Annex F. For CBEs having a degree of protection higher than IP20 according to IEC 60529, for use in locations where hazardous environmental conditions prevail (e.g. excessive humidity, heat or cold or deposition of dust) and in hazardous locations (e.g. where explosions are liable to occur), special constructions may be required. This document contains all the requirements necessary to ensure compliance with the operational characteristics required for these devices by type tests. It also contains the details relative to test requirements and methods of testing necessary to ensure reproducibility of test results. This document states: a) the characteristics of CBEs; b) the conditions with which CBEs shall comply, with reference to: 1) their operation and behaviour in normal service; 2) their operation and behaviour in case of overload; 3) their operation and behaviour in case of short-circuits up to their rated short-circuit capacity; 4) their dielectric properties; c) the tests intended for confirming that these conditions have been met and the methods to be adopted for the tests; d) the data to be marked on the devices; e) the test sequences to be carried out and the number of samples to be submitted for certification purposes (see Annex C); f) the routine tests to be carried out to reveal unacceptable variations in material or manufacture, likely to affect safety (see Annex I).

Geräteschutzschalter (GS) (IEC 60934:2019)

Disjoncteurs pour équipement (DPE) (IEC 60934:2019)

IEC 60934:2019 est disponible sous forme de IEC 60934:2019 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60934:2019 applicable aux appareils mécaniques de connexion désignés sous le nom de "disjoncteurs pour équipement" (DPE) pour applications domestiques et analogues. Selon le présent document, les DPE sont destinés à la protection des circuits internes des équipements électriques, y compris leurs composants (par exemple, les moteurs, les transformateurs, le câblage interne). Le présent document couvre aussi les DPE applicables pour la protection des équipements électriques en cas de sous-tension et/ou de surtension. Le présent document couvre aussi les DPE qui sont aptes au sectionnement. Cette quatrième édition annule et remplace la troisième édition parue en 2000, l’Amendement 1:2007 et l’Amendement 2:2013. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) éclaircissements relatifs à la finalité des essais de type.

Odklopniki za opremo (CBE) (IEC 60934:2019)

Ta dokument se uporablja za mehanske stikalne naprave, ki so izdelane kot »odklopniki za opremo« (CBE) za gospodinjsko in podobno uporabo. Odklopniki za opremo v skladu s tem dokumentom se uporabljajo za zaščito tokokrogov znotraj električne opreme, vključno z njenimi komponentami (npr. motorji, transformatorji, notranje ožičenje). Ta dokument zajema tudi odklopnike za opremo, ki se uporabljajo za zaščito električne opreme v primeru podnapetosti in/ali prenapetosti. Ta dokument zajema tudi odklopnike za opremo, ki so primerni za izolacijo. Odklopniki za opremo se ne uporabljajo za nadtokovno zaščito napeljav stavb. Odklopniki za opremo v skladu s tem dokumentom imajo: – nazivno napetost, ki ne presega 440 V izmenične napetosti (med fazami) in/ali enosmerne napetosti, ki ne presega 250 V; – nazivni tok, ki ne presega 125 A; – kratkostično zmogljivost (Icn) najmanj 6 × In (z izmenično napetostjo) in 4 × In (z enosmerno napetostjo), vendar ne presega 3000 A. Odklopniki za opremo imajo lahko pogojno kratkostično tokovno obremenljivost (Inc) v povezavi z določeno napravo za zaščito pred kratkim stikom (SCPD). Navodila za usklajevanje povezanega odklopnika za opremo v istem tokokrogu z napravo za zaščito pred kratkim stikom so podana v dodatku F. Pri odklopnikih za opremo, katerih stopnja zaščite je višja od IP20 v skladu s standardom IEC 60529 in se uporabljajo na območjih, kjer prevladujejo nevarni okoljski pogoji (npr. prekomerna vlažnost, toplota ali hlad, nabiranje prahu), ter na nevarnih območjih (npr. kjer lahko pride do eksplozij), so morda potrebne posebne konstrukcije. Ta dokument vsebuje vse zahteve, ki so nujne za zagotovitev skladnosti z obratovalnimi značilnostmi, ki so za te naprave zahtevane v tipskih preskusih. Vsebuje tudi podrobnosti glede preskusnih zahtev in metod preskušanja, ki so nujne za zagotovitev ponovljivosti rezultatov preskusov. Ta dokument določa: a) lastnosti odklopnikov za opremo; b) pogoje, s katerimi morajo odklopniki za opremo izpolnjevati zahteve glede na: 1) delovanje in obnašanje v običajnih pogojih, 2) delovanje in obnašanje pri preobremenitvi, 3) delovanje in obnašanje v primeru kratkega stika do nazivne kratkostične zmogljivosti, 4) dielektrične lastnosti; c) preskuse, katerih cilj je potrditi, da so bili ti pogoji in metode izvajanja teh preskusov izpolnjeni; d) podatke, ki morajo biti označeni na napravah; e) preskusna zaporedja, ki jih je treba izvesti, in število vzorcev za namene certificiranja (glej dodatek C); f) rutinske preskuse, ki jih je treba izvesti za odkritje nesprejemljivih odstopanj v materialu ali proizvodnji, ki lahko vplivajo na varnost (glej dodatek I).

General Information

Status
Published
Publication Date
04-Nov-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Sep-2019
Due Date
01-Dec-2019
Completion Date
05-Nov-2019

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SLOVENSKI STANDARD
SIST EN IEC 60934:2019
01-december-2019
Nadomešča:
SIST EN 60934:2003
SIST EN 60934:2003/A1:2007
SIST EN 60934:2003/A2:2013
Odklopniki za opremo (CBE) (IEC 60934:2019)
Circuit-breakers for equipment (CBE) (IEC 60934:2019)
Geräteschutzschalter (GS) (IEC 60934:2019)
Disjoncteurs pour équipement (DPE) (IEC 60934:2019)
Ta slovenski standard je istoveten z: EN IEC 60934:2019
ICS:
29.120.40 Stikala Switches
29.120.50 Varovalke in druga Fuses and other overcurrent
medtokovna zaščita protection devices
SIST EN IEC 60934:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60934:2019
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SIST EN IEC 60934:2019
EUROPEAN STANDARD EN IEC 60934
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2019
ICS 29.120.40; 29.120.50 Supersedes EN 60934:2001 and all of its amendments
and corrigenda (if any)
English Version
Circuit breakers for equipment (CBE)
(IEC 60934:2019)
Disjoncteurs pour équipement (DPE) Geräteschutzschalter (GS)
(IEC 60934:2019) (IEC 60934:2019)

This European Standard was approved by CENELEC on 2019-03-06. 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.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists 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,

Turkey and the United Kingdom.
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

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60934:2019 E
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SIST EN IEC 60934:2019
EN IEC 60934:2019 (E)
European foreword

The text of document 23E/1084/FDIS, future edition 4 of IEC 60934, prepared by SC 23E "Circuit-

breakers and similar equipment for household use" of IEC/TC 23 "Electrical accessories" was

submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 60934:2019.

The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2020-03-20

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2022-09-20

document have to be withdrawn

This document supersedes EN 60934:2001 and all of its amendments and corrigenda (if any).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association, and supports essential requirements of EU

Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this

document.
Endorsement notice

The text of the International Standard IEC 60934:2019 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 60038:2009 NOTE Harmonized as EN 60038:2011
IEC 60112:2003 NOTE Harmonized as EN 60112:2003 (not modified)

IEC 60112:2003/A1:2009 NOTE Harmonized as EN 60112:2003/A1:2009 (not modified)

IEC 60269 (series) NOTE Harmonized as EN 60269 (series)
IEC 60664 (series) NOTE Harmonized as EN 60664 (series)
IEC 60947-1:2007 NOTE Harmonized as EN 60947-1:2007 (not modified)
IEC 61543:1995 NOTE Harmonized as EN 61543:1995 (not modified)
IEC 61543:1995/A2:2005 NOTE Harmonized as EN 61543:1995/A2:2006 (not modified)
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SIST EN IEC 60934:2019
EN IEC 60934:2019 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60060-1 2010 High-voltage test techniques - Part 1: EN 60060-1 2010
General definitions and test requirements
IEC 60068-2-20 - Environmental testing - Part 2-20: Tests - EN 60068-2-20 2008
Test T: Test methods for solderability and
resistance to soldering heat of devices with
leads
IEC 60227 series Polyvinyl chloride insulated cables of rated - -
voltages up to and including 450/750 V
IEC 60417 1973 Graphical symbols for use on equipment. - -
Index, survey and compilation of the single
sheets.
IEC 60529 2013 Degrees of protection provided by - -
enclosures (IP Code)
IEC 60664-1 2007 Insulation coordination for equipment EN 60664-1 2007
within low-voltage systems - Part 1:
Principles, requirements and tests
IEC 60664-3 - Insulation coordination for equipment EN 60664-3 2017
within low-voltage systems - Part 3: Use of
coating, potting or moulding for protection
against pollution
IEC 60695-2-10 - Fire hazard testing - Part 2-10: EN 60695-2-10 2013
Glowing/hot-wire based test methods -
Glow-wire apparatus and common test
procedure

IEC 60898-1 (mod) 2015 Electrical accessories - Circuit-breakers for EN 60898-1 2019

overcurrent protection for household and
similar installations - Part 1: Circuit-
breakers for a.c. operation
Dated as no equivalent European Standard exists.
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SIST EN IEC 60934:2019
EN IEC 60934:2019 (E)
Publication Year Title EN/HD Year
IEC 61000-4-2 - Electromagnetic compatibility (EMC) - Part EN 61000-4-2 2009
4-2: Testing and measurement techniques
- Electrostatic discharge immunity test
IEC 61000-4-3 2008 Electromagnetic compatibility (EMC) - Part - -
4-3: Testing and measurement techniques
- Radiated, radio-frequency,
electromagnetic field immunity test
IEC 61000-4-4 - Electromagnetic compatibility (EMC) - Part EN 61000-4-4 2012
4-4: Testing and measurement techniques
- Electrical fast transient/burst immunity
test
IEC 61000-4-5 - Electromagnetic compatibility (EMC) - Part EN 61000-4-5 2014
4-5: Testing and measurement techniques
- Surge immunity test
+ A1 2017
IEC 61000-6-1 - Electromagnetic compatibility (EMC) - Part EN IEC 61000-6-1 2019
6-1: Generic standards - Immunity
standard for residential, commercial and
light-industrial environments
CISPR 32 - Electromagnetic compatibility of multimedia EN 55032 2015
equipment - Emission requirements
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SIST EN IEC 60934:2019
EN IEC 60934:2019 (E)
Annex ZZ
(informative)
Coverage of Essential Requirements of EU Directives

This European Standard has been prepared under a Commission’s standardization request relating to

harmonized standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means

of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the

Council of 26 February 2014 on the harmonization 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

[2014 OJ L96].

Once this standard is cited in the Official Journal of the European Union under that Directive,

compliance with the normative clauses of this standard given in Table ZZ.1 confers, within the limits of

the scope of this standard, a presumption of conformity with the corresponding essential requirements

of that Directive, and associated EFTA regulations.
Table ZZ.2 – Correspondence between this European standard and Article 3 of
Directive 2014/35/EU [2014 OJ L153]
Clause(s) / sub-clause(s)
Safety Objectives of Directive
Remarks / Notes
of this EN
2014/35/EU
(1)(a) 1, 2, 3, 4, 5, 6 – 9.3
(1)(b) 8.1.1, 8.1.2, 8.1.5, 8.1.6,8.1.7,
9.1, 9.2, 9.3, 9.4.1, 9.4.2, 9.4.3,
Annex E
(1)(c) 7 – 9.1 and 9.2, Annex J
(2) (a) 8.2, 8.5, 8.6, 8.7, 9.6, 9.8, 9.9,
9.10, 9.11, 9.12, Annex C
(2) (b) 8.3, 8.5, 8.6, 8.7, 9.8, 9.9, 9.10,
9.11, 9.12, Annex C
(2) (c) 6, 8.1.2,9.11.4.1, 9.12.4.2
(2) (d) 8.1.3, 8.4, 9.7, Annex B
(3) (a) 8.8, 8.12, 9.13, 9.17
(3) (b) 8.9, 8.10, 9.14, 9.15, Annex G
(3) (c) 8.5, 8.6, 8.7, 9.10, 9.11 9.12

WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European

standard is maintained in the list published in the Official Journal of the European Union. Users of this

standard should consult frequently the latest list published in the Official Journal of the European

Union.

WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of

this standard.
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SIST EN IEC 60934:2019
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SIST EN IEC 60934:2019
IEC 60934
Edition 4.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Circuit-breakers for equipment (CBE)
Disjoncteurs pour équipement (DPE)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.40; 29.120.50 ISBN 978-2-8322-6391-4

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
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SIST EN IEC 60934:2019
– 2 – IEC 60934:2019 © IEC 2019
CONTENTS

FOREWORD ........................................................................................................................... 8

1 Scope ............................................................................................................................ 10

2 Normative references .................................................................................................... 11

3 Terms and definitions .................................................................................................... 12

3.1 Definitions related to protection and switching devices .......................................... 12

3.2 General terms ....................................................................................................... 13

3.3 Definitions related to current ................................................................................. 15

3.4 Definitions related to voltage ................................................................................. 16

3.5 Definitions related to constructional elements of a CBE ........................................ 16

3.6 Definitions related to releases in CBEs ................................................................. 18

3.7 Definitions related to insulation coordination ......................................................... 20

3.8 Definitions related to operation of CBEs ................................................................ 22

3.9 Definitions related to the operating characteristic of CBEs .................................... 23

3.10 Definitions related to characteristic quantities ....................................................... 23

3.11 Definitions concerning coordination of CBEs and SCPDs associated in the

same circuit .......................................................................................................... 24

3.12 Definitions related to terminals and terminations ................................................... 25

3.13 Definitions related to tests .................................................................................... 28

4 Classification ................................................................................................................. 28

4.1 General ................................................................................................................. 28

4.2 Quantity of poles ................................................................................................... 28

4.3 Method of mounting .............................................................................................. 28

4.4 Method of connection ............................................................................................ 29

4.5 Method of operation .............................................................................................. 29

4.6 Mode of tripping .................................................................................................... 29

4.6.1 CBEs tripping by current (overcurrent) ........................................................... 29

4.6.2 CBEs tripping by voltage ............................................................................... 29

4.7 Influence of the ambient temperature .................................................................... 30

4.8 Trip-free behaviour ............................................................................................... 30

4.9 Influence of the mounting position ......................................................................... 30

4.10 Electrical performance .......................................................................................... 30

4.11 Suitability for isolation ........................................................................................... 30

5 Characteristics of CBEs ................................................................................................. 30

5.1 List of characteristics ............................................................................................ 30

5.2 Rated quantities .................................................................................................... 30

5.2.1 General ......................................................................................................... 30

5.2.2 Rated voltages .............................................................................................. 30

5.2.3 Rated current (I ) .......................................................................................... 31

5.2.4 Rated frequency ............................................................................................ 31

5.2.5 Rated switching capacity (rated making and breaking capacity) ..................... 31

5.2.6 Rated conditional short-circuit current (I ) ................................................... 32

5.2.7 Rated short-circuit capacity (I ) ................................................................... 32

5.3 Standard and preferred values .............................................................................. 32

5.3.1 Preferred values of rated voltage ................................................................... 32

5.3.2 Standard rated frequencies ............................................................................ 32

5.3.3 Standard values of rated conditional short-circuit current ............................... 32

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SIST EN IEC 60934:2019
IEC 60934:2019 © IEC 2019 – 3 –

6 Marking and other product information ........................................................................... 33

7 Standard conditions for operation in service .................................................................. 34

7.1 General ................................................................................................................. 34

7.2 Ambient air temperature ........................................................................................ 34

7.2.1 Reference ambient air temperature T for calibration ....................................... 34

7.2.2 Limits of ambient air temperature for operation in service .............................. 34

7.3 Altitude ................................................................................................................. 34

7.4 Atmospheric conditions ......................................................................................... 35

8 Requirements for construction and operation ................................................................. 35

8.1 Mechanical design ................................................................................................ 35

8.1.1 General ......................................................................................................... 35

8.1.2 Mechanism .................................................................................................... 35

8.1.3 Clearances and creepage distances (see Annex B) ....................................... 36

8.1.4 Screws, current-carrying parts and connections ............................................. 39

8.1.5 Screw-type and screwless terminals .............................................................. 40

8.1.6 Solder terminations ........................................................................................ 43

8.1.7 Flat quick-connect male tabs (Figures E.6 to E.13) ........................................ 43

8.2 Protection against electric shock ........................................................................... 46

8.3 Temperature-rise .................................................................................................. 46

8.3.1 Temperature-rise limits .................................................................................. 46

8.3.2 Ambient air temperature ................................................................................ 47

8.4 Dielectric properties .............................................................................................. 47

8.4.1 Dielectric strength at power frequency ........................................................... 47

8.4.2 Clearances for insulation coordination ........................................................... 47

8.5 Conditions for automatic operation ........................................................................ 48

8.5.1 Standard time-current zone ........................................................................... 48

8.5.2 Tripping characteristic ................................................................................... 48

8.5.3 Operating limits of overvoltage releases ........................................................ 49

8.5.4 Operating limits of undervoltage and zero-voltage releases ........................... 49

8.5.5 Electrical endurance of undervoltage releases ............................................... 49

8.6 Electrical performance and behaviour at rated short-circuit capacity ..................... 49

8.7 Performance under conditional short-circuit current conditions .............................. 50

8.8 Resistance to mechanical shock and impact ......................................................... 50

8.9 Resistance to heat ................................................................................................ 50

8.10 Resistance to abnormal heat and to fire ................................................................ 50

8.11 Resistance to tracking ........................................................................................... 50

8.12 Resistance to rusting ............................................................................................ 50

9 Tests ............................................................................................................................. 52

9.1 Type tests and sequences .................................................................................... 52

9.2 Test conditions ..................................................................................................... 53

9.3 Test of indelibility of marking ................................................................................ 54

9.4 Test of reliability of terminals, current-carrying parts and connections ................... 54

9.4.1 Screw type and screwless terminals .............................................................. 54

9.4.2 Solder terminations ........................................................................................ 56

9.4.3 Flat quick-connect male tabs ......................................................................... 56

9.5 Test of reliability of terminals for external conductors (see 3.12.15) ...................... 57

9.6 Test of protection against electric shock ............................................................... 58

9.7 Test of dielectric properties ................................................................................... 59

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SIST EN IEC 60934:2019
– 4 – IEC 60934:2019 © IEC 2019

9.7.1 Resistance to humidity ................................................................................... 59

9.7.2 Insulation resistance of the main circuit ......................................................... 59

9.7.3 Dielectric strength of the main circuit ............................................................. 60

9.7.4 Dielectric strength of the auxiliary circuits ...................................................... 60

9.7.5 Value of test voltage ...................................................................................... 60

9.7.6 Test for the verification of insulation coordination by impulse withstand

voltage test .................................................................................................... 61

9.8 Test of temperature-rise ........................................................................................ 62

9.8.1 Ambient air temperature ................................................................................ 62

9.8.2 Test procedure .............................................................................................. 62

9.8.3 Measurement of the temperature of parts ...................................................... 63

9.8.4 Temperature-rise of a part ............................................................................. 63

9.9 28-day test ............................................................................................................ 63

9.10 Test of tripping characteristics .............................................................................. 63

9.10.1 General ......................................................................................................... 63

9.10.2 Test of time-current characteristic .................................................................. 64

9.10.3 Test of instantaneous tripping (of the magnetic release) ................................ 64

9.10.4 Test of effect of single-pole loading on the tripping characteristic of

multi-pole CBEs ............................................................................................. 64

9.10.5 Test of effect of ambient temperature on the tripping characteristic ............... 64

9.11 Verification of electrical operational capability ....................................................... 64

9.11.1 General requirements .................................................................................... 64

9.11.2 Behaviour at rated current (or under low overloads for R-type and J-

type CBEs) .................................................................................................... 66

9.11.3 Behaviour at rated switching capacity ............................................................ 66

9.11.4 Behaviour at rated short-circuit capacity ........................................................ 66

9.11.5 Test of overvoltage releases at operating limits ............................................. 68

9.11.6 Behaviour of undervoltage and zero-voltage releases .................................... 68

9.12 Conditional short-circuit current tests .................................................................... 68

9.12.1 General ......................................................................................................... 68

9.12.2 Values of test quantities ................................................................................ 69

9.12.3 Tolerances on test quantities ......................................................................... 69

9.12.4 Test procedure .............................................................................................. 69

9.13 Test of resistance to mechanical shock and impact ............................................... 71

9.14 Tests of resistance to heat .................................................................................... 71

9.15 Test of resistance to abnormal heat and to fire ..................................................... 72

9.16 Test of resistance to tracking ................................................................................ 72

9.17 Test of resistance to rusting .................................................................................. 73

Annex A (normative) Time-current zone (see 9.10 and Table 9) ........................................... 79

Annex B (normative) Determination of clearances and creepage distances .......................... 80

Annex C (normative) Test sequences and number of samples to be submitted for

certification purposes ............................................................................................................ 82

C.1 Test sequences .................................................................................................... 82

C.2 Number of samples to be submitted for full test procedure .................................... 83

C.3 Number of samples to be submitted for simplified test procedure in case of

submitting simultaneously a series of CBEs of the same basic design................... 83

Annex D (normative) Correspondence between ISO and AWG copper conductors ............... 85

Annex E (normative) Examples of terminals ......................................................................... 86

Annex F (informative) Coordination between a CBE and a short-circuit protective

device (SCPD) associated in the same circuit ....................................................................... 95

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SIST EN IEC 60934:2019
IEC 60934:2019 © IEC 2019 – 5 –

F.1 General ................................................................................................................. 95

F.2 Overview............................................................................................................... 95

F.3 General requirements for co-ordination of a CBE with an associated SCPD .......... 96

F.3.1 General considerations .................................................................................. 96

F.3.2 Requirements concerning back-up protection ................................................ 96

F.3.3 Requirements concerning discrimination ........................................................ 96

F.3.4 Required information ..................................................................................... 96

F.4 Verification of coordination .................................................................................... 97

F.4.1 General considerations including the conditions for verification by desk

study ............................................................................................................. 97

F.4.2 Verification of discrimination .......................................................................... 97

F.4.3 Verification of coordinated back-up protection ............................................... 98

F.5 Examples of verification of coordination by desk study .......................................... 99

Annex G (normative) Electromagnetic behaviour of CBEs .................................................. 107

G.1 General ............................................................................................................... 107

G.2 Immunity ................................
...

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