IEC TS 61851-3-1:2023

IEC TS 61851-3-1 ®
Edition 1.0 2023-07
TECHNICAL
SPECIFICATION
Electric vehicle conductive charging system –
Part 3-1: DC EV supply equipment where protection relies on double or
reinforced insulation – General rules and requirements for stationary equipment
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IEC TS 61851-3-1 ®
Edition 1.0 2023-07
TECHNICAL
SPECIFICATION
Electric vehicle conductive charging system –

Part 3-1: DC EV supply equipment where protection relies on double or

reinforced insulation – General rules and requirements for stationary equipment

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 43.120 ISBN 978-2-8322-7073-8

– 2 – IEC TS 61851-3-1:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 11
3.1 Electric supply equipment . 12
3.2 Insulation . 13
3.3 Functions . 14
3.4 Vehicle . 15
3.5 Cords, cables and connection means . 16
4 Symbols and abbreviated terms . 18
5 General requirements . 18
6 Classification . 19
6.1 Characteristics of supply network . 19
6.2 Method of connection . 19
6.3 Normal environmental conditions . 20
6.4 Special environmental conditions . 20
6.5 Access . 20
6.6 Mounting method . 20
6.7 EV supply system configuration . 20
7 General EV supply system requirements . 22
7.1 EV supply system requirements . 22
7.1.1 General . 22
7.1.2 EV supply system configuration type A . 23
7.1.3 EV supply system configuration type B . 23
7.1.4 EV supply system configuration type C . 23
7.1.5 EV supply system configuration type D . 23
7.1.6 EV supply system configuration type E . 23
7.1.7 EV supply system configuration type F . 23
7.1.8 Conversion device . 24
7.2 Voltages and currents . 24
7.2.1 Rated voltages and currents . 24
7.2.2 Current and voltage regulation . 24
7.2.3 AUX supply circuit . 25
7.3 Functions provided. 26
7.3.1 Mandatory functions for power transfer . 26
7.3.2 Optional functions for power transfer . 26
7.3.3 Objects for compatibility check . 26
7.4 Requirements for AC/DC or DC/DC VCU for stationery DRI EV supply
equipment . 27
7.4.1 General . 27
7.4.2 Built-in AC/DC VCU for stationary DRI EV supply equipment . 27
7.4.3 Built-in DC/DC VCU for stationary DRI EV supply equipment . 27
7.4.4 Protection against access to live parts of built-in VCUs . 27
8 Communications . 28
8.1 Command and control communication (mandatory) . 28

8.2 Optional communication . 28
8.3 Communication circuit from the DRI EV supply equipment to the
telecommunication networks . 28
9 Protection against electric shock . 28
9.1 Protection against direct contact . 28
9.1.1 General . 28
9.1.2 IP ratings for protection against electric shock . 29
9.2 Stored energy – Discharge of capacitors . 29
9.2.1 Disconnection of plug connected EV supply equipment . 29
9.2.2 Loss of supply voltage to permanently connected EV supply equipment . 29
9.3 Fault protection . 30
9.4 DC leakage currents . 30
9.5 Y capacitors . 30
10 Specific requirements for accessories . 30
10.1 General requirements . 30
10.2 Adaptors . 30
10.3 Latching device . 30
10.4 Contact sequencing of accessories . 31
11 Cable assembly requirements . 31
11.1 General . 31
11.2 Electrical rating . 31
11.3 Mechanical characteristics . 31
11.4 Storage means for case C . 32
11.5 Strain relief . 32
12 DRI EV supply equipment constructional requirements and tests . 32
12.1 Characteristics of mechanical switching devices . 32
12.1.1 General . 32
12.1.2 Switch and switch-disconnector . 32
12.1.3 Contactor . 32
12.1.4 Circuit-breaker . 32
12.1.5 Relays . 33
12.1.6 Switch-on peak current . 33
12.2 Clearances and creepage distances . 33
12.3 IP degrees . 34
12.3.1 Degrees of protection against solid foreign objects and water for the
enclosure . 34
12.3.2 Degrees of protection against solid foreign objects and water for
accessories . 34
12.4 Insulation resistance . 34
12.5 Touch current . 35
12.6 Dielectric withstand voltage . 35
12.6.1 AC withstand voltage . 35
12.6.2 Impulse dielectric withstand (1,2/50 µs) . 36
12.7 Temperature rise . 36
12.8 Damp heat functional test . 36
12.9 Minimum temperature functional test . 36
12.10 Mechanical strength . 37
13 Overload and short-circuit protection . 37
14 Emergency switching or disconnect (optional) . 37

– 4 – IEC TS 61851-3-1:2023 © IEC 2023
15 Marking and instructions . 38
15.1 Inst
...