Residual direct current detecting device (RDC-DD) to be used for mode 3 charging of electric vehicles

IEC 62955:2018 applies to residual direct current detecting devices (RDC-DD) for permanently connected AC electric vehicle charging stations (mode 3 charging of electric vehicles, according to IEC 61851-1 and IEC 60364-7-722), hereafter referred to as RDC-MD (residual direct current monitoring device) or RDC-PD (residual direct current protective device), for rated voltages not exceeding 440 V AC with rated frequencies of 50 Hz, 60 Hz or 50/60 Hz and rated currents not exceeding 125 A.

Dispositif de détection à courant différentiel résiduel continu (DD-CDC) à utiliser pour la charge en mode 3 des véhicules électriques

L'IEC 62955:2018 s'applique aux dispositifs de détection à courant différentiel résiduel continu (DD-CDC) pour les bornes de charge à courant alternatif pour véhicule électrique branchées en permanence (charge en mode 3 des véhicules électriques, conformément à l'IEC 61851-1 et à l'IEC 60364-7-722), appelé DC-CDC (dispositif de contrôle à courant différentiel résiduel continu) ou DP-CDC (dispositif de protection contre un courant différentiel résiduel continu) dans la suite du texte, pour des tensions assignées alternatives ne dépassant pas 440 V avec des fréquences assignées de 50 Hz, 60 Hz ou 50/60 Hz et des courants nominaux ne dépassant pas 125 A.

General Information

Status
Published
Publication Date
11-Mar-2018
Current Stage
PPUB - Publication issued
Start Date
12-Mar-2018
Completion Date
12-Mar-2018
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IEC 62955
Edition 1.0 2018-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Residual direct current detecting device (RDC-DD) to be used for mode 3
charging of electric vehicles

Dispositif de détection à courant différentiel résiduel continu (DD-CDC) à utiliser

pour la charge en mode 3 des véhicules électriques
IEC 62955:2018-03(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62955
Edition 1.0 2018-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Residual direct current detecting device (RDC-DD) to be used for mode 3
charging of electric vehicles

Dispositif de détection à courant différentiel résiduel continu (DD-CDC) à utiliser

pour la charge en mode 3 des véhicules électriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-5424-0

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 62955:2018 © IEC 2018
CONTENTS

FOREWORD ......................................................................................................................... 11

INTRODUCTION ................................................................................................................... 13

1 Scope ............................................................................................................................ 14

2 Normative references .................................................................................................... 15

3 Terms, definitions and symbols ..................................................................................... 15

3.1 Definitions relating to RDC-DD design .................................................................. 16

3.2 Symbols ................................................................................................................ 16

4 Classification RDC-DD (RDC-MD, RDC-PD) .................................................................. 16

4.1 RDC-DDs are classified according to the type of construction ............................... 16

4.1.1 RDC-MD ........................................................................................................ 17

4.1.2 RDC-PD ........................................................................................................ 18

4.2 According to the number of poles .......................................................................... 18

4.3 According to the method of connection ................................................................. 18

4.4 According to the type of terminals ......................................................................... 18

4.5 According to range of ambient air temperature ...................................................... 18

5 Characteristics of RDC-DDs .......................................................................................... 18

5.1 Summary of characteristics ................................................................................... 18

5.2 Rated quantities and other characteristics............................................................. 19

5.2.1 Rated voltage (U ) ........................................................................................ 19

5.2.2 Rated current (I ) .......................................................................................... 19

5.2.3 Rated DC residual operating current (I ) ................................................... 19

Δdc

5.2.4 Rated DC residual non-operating current (I ) .......................................... 19

Δndc

5.2.5 Rated frequency ............................................................................................ 19

5.2.6 Rated making and breaking capacity (I ) ...................................................... 19

5.3 Standard and preferred values .............................................................................. 20

5.3.1 Preferred values of rated voltage (U ) ........................................................... 20

5.3.2 Preferred values of rated current (I ) ............................................................. 20

5.3.3 Standard value of rated DC residual operating current (I ) ........................ 20

Δdc

5.3.4 Standard value of DC residual non-operating current (I ) ........................ 20

Δndc

5.3.5 Preferred values of rated frequency ............................................................... 20

5.3.6 Minimum value of the rated making and breaking capacity (I ) ..................... 20

5.3.7 Minimum value of the rated residual making and breaking capacity

(I ) ............................................................................................................. 21

5.3.8 Standard and preferred values of the rated conditional short-circuit

current (I ) .................................................................................................. 21

5.3.9 Standard values of the rated conditional residual short-circuit current

(I ) .............................................................................................................. 21

5.3.10 Limiting values of break time ......................................................................... 21

5.3.11 Standard value of rated impulse withstand voltage (U ) ............................. 22

imp

5.4 Coordination with short-circuit protective devices (SCPDs) ................................... 22

5.4.1 General ......................................................................................................... 22

5.4.2 Rated conditional short-circuit current (I ) ................................................... 23

5.4.3 Rated conditional residual short-circuit current (I ) ...................................... 23

6 Marking and other product information ........................................................................... 23

7 Standard conditions for operation in service and for installation ..................................... 25

7.1 Standard conditions .............................................................................................. 25

7.2 Conditions of installation ....................................................................................... 25

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IEC 62955:2018 © IEC 2018 – 3 –

7.3 Pollution degree .................................................................................................... 25

8 Requirements for construction and operation ................................................................. 26

8.1 Mechanical design ................................................................................................ 26

8.1.1 General ......................................................................................................... 26

8.1.2 Mechanism .................................................................................................... 26

8.1.3 Clearances and creepage distances .............................................................. 27

8.1.4 Screws, current-carrying parts and connections ............................................. 32

8.1.5 Terminals for external conductors .................................................................. 33

8.2 Protection against electric shock ........................................................................... 35

8.3 Dielectric properties .............................................................................................. 36

8.4 Temperature rise .................................................................................................. 36

8.4.1 Temperature rise limits .................................................................................. 36

8.4.2 Ambient air temperature ................................................................................ 36

8.5 Operating characteristic ........................................................................................ 36

8.6 Electrical endurance ............................................................................................. 36

8.7 Performance at short-circuit currents .................................................................... 37

8.8 Resistance to mechanical shock and impact ......................................................... 37

8.9 Resistance to heat ................................................................................................ 37

8.10 Resistance to abnormal heat and to fire ................................................................ 37

8.11 Test device ........................................................................................................... 37

8.12 Behaviour of RDC-DDs in the case of current surges caused by impulse

voltages ................................................................................................................ 38

8.13 Reliability .............................................................................................................. 38

8.14 Electromagnetic compatibility (EMC) ..................................................................... 38

8.15 Behaviour of the correct operation for three- and four- pole RDC-DD

powered on two poles only .................................................................................... 38

9 Tests ............................................................................................................................. 38

9.1 General ................................................................................................................. 38

9.2 Test conditions ..................................................................................................... 39

9.3 Test of indelibility of marking ................................................................................ 40

9.4 Test of reliability of screws, current-carrying parts and connections ...................... 41

9.5 Tests of reliability of screw-type terminals for external copper conductors ............ 42

9.6 Verification of protection against electric shock ..................................................... 43

9.7 Test of dielectric properties ................................................................................... 44

9.7.1 Resistance to humidity................................................................................... 44

9.7.2 Insulation resistance of the main circuit ......................................................... 44

9.7.3 Dielectric strength of the main circuit ............................................................. 45

9.7.4 Insulation resistance and dielectric strength of auxiliary circuits .................... 46

9.7.5 Secondary circuit of detection transformers ................................................... 46

9.7.6 Capability of control circuits connected to the main circuit withstanding

high DC voltages due to insulation measurements ......................................... 47

9.7.7 Verification of impulse withstand voltages (across clearances and

across solid insulation) .................................................................................. 47

9.8 Test of temperature-rise ........................................................................................ 50

9.8.1 Ambient air temperature ................................................................................ 50

9.8.2 Test procedure .............................................................................................. 51

9.8.3 Measurement of the temperature of parts ...................................................... 51

9.8.4 Temperature rise of a part ............................................................................. 51

9.9 Verification of the operating characteristics ........................................................... 51

9.9.1 Test circuit and test procedure....................................................................... 51

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– 4 – IEC 62955:2018 © IEC 2018
9.9.2 Verification of correct operation of RDC-DDs with smooth DC residual

current ........................................................................................................... 52

9.9.3 Verification of non-operating time for alternating residual currents ................. 54

9.10 Verification of mechanical and electrical endurance .............................................. 54

9.10.1 General test conditions .................................................................................. 54

9.10.2 Test procedure .............................................................................................. 55

9.10.3 Condition of the RDC-DD after test ................................................................ 55

9.11 Verification of the behaviour of the RDC-DD under short-circuit conditions ........... 55

9.11.1 List of the short-circuit tests ........................................................................... 55

9.11.2 Short-circuit tests .......................................................................................... 56

9.12 Verification of resistance to mechanical shock and impact .................................... 63

9.12.1 Mechanical shock .......................................................................................... 63

9.12.2 Mechanical impact ......................................................................................... 63

9.13 Test of resistance to heat ...................................................................................... 66

9.14 Test of resistance to abnormal heat and to fire ..................................................... 67

9.15 Verification of the trip-free mechanism .................................................................. 67

9.15.1 General test conditions .................................................................................. 67

9.15.2 Test procedure .............................................................................................. 68

9.16 Verification of the operation of the test device at the limits of rated voltage........... 68

9.17 Verification of the correct operation in case of three- and four- pole RDC-

DDs powered on two poles only ............................................................................ 68

9.18 Verification of behaviour of RDC-DDs in case of current surges caused by

impulse voltages ................................................................................................... 68

9.18.1 Current surge test for all RDC-DDs (0,5 µs/100 kHz ring wave test)............... 68

9.18.2 Verification of behaviour at surge currents up to 3 000 A (8/20 µs surge

current test) ................................................................................................... 69

9.19 Verification of reliability ......................................................................................... 69

9.19.1 General ......................................................................................................... 69

9.19.2 Climatic test .................................................................................................. 70

9.19.3 Test with temperature of 40 °C ...................................................................... 71

9.20 Verification of ageing of electronic components .................................................... 72

9.21 Electromagnetic compatibility (EMC) ..................................................................... 72

9.21.1 Tests covered by the present document ......................................................... 72

9.21.2 Additional tests .............................................................................................. 72

9.22 Test of resistance to rusting .................................................................................. 73

Annex A (normative) Test sequence and number of samples to be submitted for

testing purposes ................................................................................................................... 95

A.1 Test sequences .................................................................................................... 95

A.2 Number of samples to be submitted for full test procedure .................................... 96

A.3 Number of samples to be submitted for simplified test procedures in case of
submitting simultaneously a range of RDC-DDs of the same fundamental

design ................................................................................................................... 97

Annex B (normative) Determination of clearances and creepage distances ........................ 100

B.1 General ............................................................................................................... 100

B.2 Orientation and location of a creepage distance .................................................. 100

B.3 Creepage distances where more than one material is used ................................. 100

B.4 Creepage distances split by floating conductive part ........................................... 100

B.5 Measurement of creepage distances and clearances .......................................... 100

Annex C (normative) Arrangement for the detection of the emission of ionized gases

during short-circuit tests ..................................................................................................... 105

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IEC 62955:2018 © IEC 2018 – 5 –

Annex D (normative) Routine tests..................................................................................... 108

D.1 General ............................................................................................................... 108

D.2 Tripping test ........................................................................................................ 108

D.3 Electric strength test ........................................................................................... 108

D.4 Performance of the test device ............................................................................ 108

Annex E (informative) Methods for determination of short-circuit power-factor ................... 109

Annex F (informative) Examples of terminal designs .......................................................... 110

Annex G (informative) Correspondence between ISO and AWG copper conductors ........... 113

Annex H (informative) SCPDs for short-circuit tests ........................................................... 114

H.1 Introductory remark ............................................................................................. 114

H.2 Silver wires ......................................................................................................... 114

H.3 Fuses ................................................................................................................. 114

H.4 Other means ....................................................................................................... 114

Annex I (normative) Particular requirements for RDC-DDs with screwless type

terminals for external copper conductors ............................................................................ 115

I.1 Scope ................................................................................................................. 115

I.2 Normative references .......................................................................................... 115

I.3 Definitions .......................................................................................................... 115

I.4 Classification ...................................................................................................... 116

I.5 Characteristics of RDC-DDs ................................................................................ 116

I.6 Marking and other product information ................................................................ 116

I.7 Standard conditions for operation in service and for installation .......................... 116

I.8 Requirements for construction and operation ...................................................... 116

I.8.1 General ....................................................................................................... 116

I.8.2 Connection or disconnection of conductors .................................................. 117

I.8.3 Dimensions of connectable conductors ........................................................ 117

I.8.4 Connectable cross-sectional areas .............................................................. 117

I.8.5 Insertion and disconnection of conductors ................................................... 118

I.8.6 Design and construction of terminals ........................................................... 118

I.8.7 Resistance to ageing ................................................................................... 118

I.9 Tests .................................................................................................................. 118

I.9.1 General ....................................................................................................... 118

I.9.2 Test of reliability of screwless terminals ....................................................... 118

I.9.3 Tests of reliability of terminals for external conductors: mechanical

strength ....................................................................................................... 119

I.9.4 Cycling test ................................................................................................. 120

I.10 Reference documents ......................................................................................... 122

Annex J (normative) Particular requirements for RDC-DDs with flat quick-connect

terminations ........................................................................................................................ 124

J.1 Scope ................................................................................................................. 124

J.2 Normative references .......................................................................................... 124

J.3 Definitions .......................................................................................................... 124

J.4 Classification ...................................................................................................... 125

J.5 Characteristics of RDC-DDs ................................................................................ 125

J.6 Marking and other product information ................................................................ 125

J.7 Standard conditions for operation in service and for installation .......................... 125

J.8 Requirements for construction and operation ...................................................... 125

J.8.1 General ....................................................................................................... 125

J.8.2 Clearances and creepage distances (see Annex B) ..................................... 125

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– 6 – IEC 62955:2018 © IEC 2018

J.8.3 Terminals for external conductors ................................................................ 126

J.9 Tests .................................................................................................................. 126

J.9.1 General ....................................................................................................... 126

J.9.2 Mechanical overload-force ........................................................................... 126

J.10 Reference documents ......................................................................................... 130

Annex K (normative) Specific requirements for RDC-DDs with screw-type terminals for

external untr
...

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