Requirements for automatic reclosing devices (ARDs) for circuit breakers, RCBOs-RCCBs for household and similar uses

IEC 63024:2017 applies to automatic reclosing devices (ARDs) for household and similar uses, for rated voltage not exceeding 440 V AC, and which are intended to be used in combination with circuit-breakers, RCCBs and RCBOs, and designed either for factory assembly or for assembly on site.
These devices are intended to reclose main protective devices (MPDs) such as circuit-breakers complying with IEC 60898-1 and/or IEC 60898-2, RCCBs complying with IEC 61008-1 and/or IEC 62423, and RCBOs complying with IEC 61009-1 and/or IEC 62423 after tripping of those devices in order to re-establish continuity of service.

Exigences pour les dispositifs à refermeture automatique (DRA) pour disjoncteurs, ID et DD, pour usages domestiques et analogues

L'IEC 63024:2017 s’applique aux dispositifs de refermeture automatique (DRA) pour usages domestiques et analogues, à des tensions assignées de 440 V c.a au maximum, et qui sont destinés à être utilisés conjointement avec des disjoncteurs, des ID et des DD. Ces dispositifs sont conçus pour un montage en usine ou sur site.
Ces dispositifs sont destinés à refermer des dispositifs de protection principaux (DPP) tels que les disjoncteurs conformes à l’IEC 60898-1 et/ou à l’IEC 60898-2, les ID conformes à l’IEC 61008-1 et/ou à l’IEC 62423, ainsi que les DD conformes à l’IEC 61009-1 et/ou à l’IEC 62423 après un déclenchement de ces dispositifs, afin de rétablir la continuité du service.

General Information

Status
Published
Publication Date
12-Dec-2017
Current Stage
PPUB - Publication issued
Completion Date
13-Dec-2017
Ref Project

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IEC 63024
Edition 1.0 2017-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Requirements for automatic reclosing devices (ARDs) for circuit-breakers,
RCBOs and RCCBs for household and similar uses
Exigences pour les dispositifs à refermeture automatique (DRA) pour
disjoncteurs, ID et DD, pour usages domestiques et analogues
IEC 63024:2017-12(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 63024
Edition 1.0 2017-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Requirements for automatic reclosing devices (ARDs) for circuit-breakers,
RCBOs and RCCBs for household and similar uses
Exigences pour les dispositifs à refermeture automatique (DRA) pour
disjoncteurs, ID et DD, pour usages domestiques et analogues
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-5132-4

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
---------------------- Page: 3 ----------------------
– 2 – IEC 63024:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 6

INTRODUCTION ..................................................................................................................... 8

1 Scope .............................................................................................................................. 9

2 Normative references ...................................................................................................... 9

3 Terms and definitions .................................................................................................... 11

4 Classification ................................................................................................................. 13

4.1 According to the method of construction ............................................................... 13

4.2 According to the associated MPD .......................................................................... 13

4.3 According to the type of assessment means ........................................................... 13

4.4 According to the safety means during the assessment ............................................ 14

4.5 According to the connection to FE ......................................................................... 14

4.6 According to maximum number of reclosing operations .......................................... 14

4.7 According to mechanical interlock between MPD operating means and ARD

enabling/disabling system ...................................................................................... 14

5 Characteristics .............................................................................................................. 14

5.1 Summary of characteristics ................................................................................... 14

5.2 Rated quantities .................................................................................................... 14

5.2.1 Rated voltage ................................................................................................ 14

5.2.2 Rated operational voltage (U ) ....................................................................... 15

5.2.3 Rated frequency ............................................................................................. 15

5.2.4 Rated non-operating resistance to earth (R ) ................................................ 15

5.2.5 Rated operating resistance to earth (R ) ........................................................ 15

5.2.6 Rated non-operating resistance between live parts (R ) ............................. 15

cc0

5.2.7 Rated operating resistance between live parts (R ) ....................................... 16

6 Marking and other product information ........................................................................... 16

6.1 Standard marking .................................................................................................. 16

6.2 Instructions for assembly and operation ................................................................. 17

7 Standard conditions for operation in service .................................................................... 18

7.1 General ................................................................................................................. 18

7.2 Conditions of installation ....................................................................................... 18

7.3 Pollution degree .................................................................................................... 18

8 Requirements for construction and operation ................................................................. 18

8.1 Mechanical design ................................................................................................ 18

8.1.1 General ......................................................................................................... 18

8.1.2 Mechanism .................................................................................................... 19

8.1.3 Clearances and creepage distances .............................................................. 20

8.1.4 Clearances and creepage distances for electronic circuits connected

between live parts or between live parts and the earth ................................... 20

8.1.5 Screws, current-carrying parts and connections .............................................. 22

8.1.6 Terminals for external conductors .................................................................. 22

8.2 Protection against electric shock............................................................................ 22

8.3 Dielectric properties and isolating capability ........................................................... 23

8.4 Temperature rise ................................................................................................... 23

8.5 Mechanical and electrical endurance ..................................................................... 23

8.6 Performance at short-circuit currents ..................................................................... 23

8.7 Resistance to mechanical shock and impact........................................................... 23

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IEC 63024:2017 © IEC 2017 – 3 –

8.8 Resistance to heat................................................................................................. 23

8.9 Resistance to abnormal heat and to fire ................................................................. 24

8.10 Operating characteristics ....................................................................................... 24

8.11 Assessment means for ARD according to 4.3.2 ....................................................... 25

8.11.1 General ......................................................................................................... 25

8.11.2 Assessment means operating by limitation of the test voltage ......................... 25

8.11.3 Assessment means operating by limitation of the test current ......................... 25

8.12 Safety in blocked condition .................................................................................... 26

8.13 Test device ........................................................................................................... 26

8.14 Ageing .................................................................................................................. 26

8.15 Electromagnetic compatibility (EMC)...................................................................... 26

9 Tests ............................................................................................................................. 26

9.1 General ................................................................................................................. 26

9.2 Test condition ....................................................................................................... 26

9.3 Measurement of the reclosing time after the tripping of the MPD ............................. 27

9.4 Test of indelibility of marking ................................................................................. 27

9.5 Verification of the non-influence of the ARD on the correct operation of the

MPD ..................................................................................................................... 27

9.5.1 Verification of the operating characteristics of the MPD ................................. 27

9.5.2 Verification of the impossibility of the activation of the ARD when the

MPD has been manually opened .................................................................... 28

9.5.3 Verification of the enabling/disabling system of the ARD................................ 28

9.5.4 Verification of the maximum number of consecutive reclosings ...................... 28

9.6 Tests of creepage distances and clearances for electronic circuits (abnormal

conditions) ............................................................................................................ 29

9.7 Requirements for capacitors, specific resistors and inductors used in

electronic circuits .................................................................................................. 32

9.7.1 General ......................................................................................................... 32

9.7.2 Capacitors ..................................................................................................... 32

9.7.3 Resistors ....................................................................................................... 32

9.7.4 Inductors and windings ................................................................................... 33

9.8 Test of reliability of screws, current-carrying parts and connections ...................... 33

9.9 Test of reliability of terminals for external conductors ............................................ 33

9.10 Verification of protection against electric shock ..................................................... 33

9.11 Test of dielectric properties and isolating capability .............................................. 33

9.12 Temperature rise .................................................................................................. 34

9.13 Verification of the mechanical and electrical endurance – Verification of the

reclosing system of the ARD ................................................................................. 34

9.13.1 General test conditions .................................................................................. 34

9.13.2 Test procedure .............................................................................................. 34

9.13.3 Condition of the ARD after the test ................................................................ 34

9.14 Short-circuit test ................................................................................................... 35

9.14.1 General conditions for short-circuit test.......................................................... 35

9.14.2 Test circuit and test quantities ....................................................................... 35

9.14.3 Test procedure .............................................................................................. 35

9.14.4 Condition of the ARD after the test ................................................................ 35

9.15 Resistance to mechanical shock and impact ......................................................... 36

9.16 Test of resistance to heat ...................................................................................... 36

9.17 Resistance to abnormal heat and to fire ................................................................ 36

9.18 Verification of the operating characteristics ........................................................... 36

---------------------- Page: 5 ----------------------
– 4 – IEC 63024:2017 © IEC 2017

9.18.1 General ......................................................................................................... 36

9.18.2 Verification of the reclosing subordinated to the measurements of the

resistance to earth ......................................................................................... 36

9.18.3 Verification of the reclosing subordinated to the measurements of the

resistance between live parts ......................................................................... 37

9.18.4 Verification of the influence of the distributed capacities in the

installation on the operating characteristic ..................................................... 37

9.18.5 Verification of the maximum current in FE under normal condition ................. 37

9.19 Verification of the safety during the assessment ................................................... 38

9.19.1 Verification of the limitation of the voltage ..................................................... 38

9.19.2 Verification of the limitation of the test current ............................................... 38

9.19.3 Verification of the safety in blocked condition ................................................ 38

9.20 Verification of the operation of the test device at the limits of rated voltage ........... 39

9.21 Verification of ageing ............................................................................................ 39

9.22 Electromagnetic compatibility ................................................................................ 39

9.22.1 General ......................................................................................................... 39

9.22.2 Low-frequency electromagnetic phenomena .................................................. 39

9.22.3 High-frequency immunity ............................................................................... 40

9.22.4 Electrostatic discharges ................................................................................. 41

9.22.5 Electromagnetic emission of ARDs ................................................................ 41

9.22.6 Performance criteria ...................................................................................... 41

Annex A (informative) Classification of ARDs according to 4.3.1 .......................................... 48

Annex B (informative) Classification of ARDs according to 4.3.2.1 a) and/or 4.3.2.2 a) ........ 49

Annex C (informative) Classification of ARDs according to 4.3.2.1 b) and/or 4.3.2.2 b) ........ 50

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

verification of conformity ....................................................................................................... 51

Bibliography .......................................................................................................................... 54

Figure 1 – Minimum creepage distances and clearances measured ...................................... 42

Figure 2 – Minimum creepage distances and clearances as a function of peak value of

operating voltage .................................................................................................................. 43

Figure 3 – Verification of the reclosing subordinated to the measurements of the

resistance to earth for ARD without functional earthing (9.18.2 a), 9.18.2 b) and 9.19.2) ...... 44

Figure 4 – Verification of the reclosing subordinated to the measurements of the

resistance to earth for ARD with functional earthing (9.18.2 a), 9.18.2 b) and 9.19.2) ........... 45

Figure 5 – Verification of the reclosing subordinated to the measurements of the

resistance between live parts (9.18.3 a) and 9.18.3 b)) ......................................................... 46

Figure 6 – Test circuit for the verification of the maximum current in FE under normal

condition ............................................................................................................................... 47

Figure A.1 – Classification of ARDs according to 4.3.1.......................................................... 48

Figure B.1 – Classification of ARDs according to 4.3.2.1 a) and/or 4.3.2.2 a) ........................ 49

Figure C.1 – Classification of ARDs according to 4.3.2.1 b) and/or 4.3.2.2 b) ........................ 50

Table 1 – Minimum admissible R values .............................................................................. 15

Table 2 – Minimum clearances and creepage distances ........................................................ 21

Table 3 – Behaviour of the ARD in enable condition .............................................................. 25

Table 4 – Maximum permissible temperatures under abnormal conditions ............................. 31

Table 5 – Low frequency immunity test conditions ................................................................ 40

---------------------- Page: 6 ----------------------
IEC 63024:2017 © IEC 2017 – 5 –

Table 6 – High-frequency immunity test conditions ............................................................... 40

Table 7 – Test conditions for electrostatic discharges ............................................................ 41

Table D.1 – Test sequences ................................................................................................. 51

Table D.2 – Number of samples for full test procedure .......................................................... 52

Table D.3 – Additional tests for ARD already fully tested together with one kind of MPD ....... 53

---------------------- Page: 7 ----------------------
– 6 – IEC 63024:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
REQUIREMENTS FOR AUTOMATIC RECLOSING DEVICES (ARDs)
FOR CIRCUIT-BREAKERS, RCBOs AND RCCBs
FOR HOUSEHOLD AND SIMILAR USES
FOREWORD

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International Standard IEC 63024 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 International Standard is based on the following documents:
FDIS Report on voting
23E/1037/FDIS 23E/1038/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

---------------------- Page: 8 ----------------------
IEC 63024:2017 © IEC 2017 – 7 –

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 9 ----------------------
– 8 – IEC 63024:2017 © IEC 2017
INTRODUCTION

Automatic reclosing devices (ARDs) are intended to reclose circuit-breakers, RCBOs, and RCCBs

after tripping in order to re-establish continuity of service.
---------------------- Page: 10 ----------------------
IEC 63024:2017 © IEC 2017 – 9 –
REQUIREMENTS FOR AUTOMATIC RECLOSING DEVICES (ARDs)
FOR CIRCUIT-BREAKERS, RCBOs AND RCCBs
FOR HOUSEHOLD AND SIMILAR USES
1 Scope

This International Standard applies to automatic reclosing devices (ARDs) for household and

similar uses, for rated voltage not exceeding 440 V AC, and which are intended to be used in

combination with circuit-breakers, RCCBs and RCBOs, and designed either for factory

assembly or for assembly on site.

These devices are intended to reclose main protective devices (MPDs) such as circuit-breakers

complying with IEC 60898-1 and/or IEC 60898-2, RCCBs complying with IEC 61008-1 and/or

IEC 62423, and RCBOs complying with IEC 61009-1 and/or IEC 62423 after tripping of those

devices in order to re-establish continuity of service.
This document includes the following types of ARDs:

– ARDs with assessment means, reclosing only if both the prospective line current and the

prospective earth-fault current do not exceed given values;

– ARDs with assessment means, reclosing only if the prospective line current does not exceed a

given value;

– ARDs with assessment means, reclosing only if the prospective earth-fault current does

not exceed a given value;
– ARDs that recloses without any assessment.

NOTE 1 Installation rules define the condition of use of each of the products and the types.

NOTE 2 The assessment cannot substitute the verifications required by IEC 60364-6.

NOTE 3 The requirements and tests for the assessment function in IT sy
...

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