IEC TS 61851-3-2:2023

Electric vehicle conductive charging system - Part 3-2: DC EV supply equipment where protection relies on double or reinforced insulation - Particular requirements for portable and mobile equipment

IEC TS 61851-3-2:2023 This part of IEC 61851, which is a Technical Specification, applies to the portable and mobile DRI EV supply equipment where the protection against electric shocks relies on double or reinforced insulation, and with double or reinforced insulation between all AC and DC inputs and outputs with a rated input voltage being not more than 250 V AC and output voltages not more than 120 V DC.

General Information

• Status: Published
• Publication Date: 17-Jul-2023
• ICS: 43.120 - Electric road vehicles
• Technical Committee: TC 69 - Electrical power/energy transfer systems for electrically propelled road vehicles and industrial trucks
• Drafting Committee: WG 10 - TC 69/WG 10
• Current Stage: PPUB - Publication issued
• Start Date: 05-Jul-2023
• Completion Date: 18-Jul-2023

Standards Content (Sample)

IEC TS 61851-3-2 ®
Edition 1.0 2023-07
TECHNICAL
SPECIFICATION
Electric vehicle conductive charging system –
Part 3-2: DC EV supply equipment where protection relies on double or
reinforced insulation – Particular requirements for portable and mobile
equipment
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IEC TS 61851-3-2 ®
Edition 1.0 2023-07
TECHNICAL
SPECIFICATION
Electric vehicle conductive charging system –

Part 3-2: DC EV supply equipment where protection relies on double or

reinforced insulation – Particular requirements for portable and mobile

equipment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS  43.120 ISBN 978-2-8322-7085-1

– 2 – IEC TS 61851-3-2:2023 © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms, definitions, symbols and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Symbols and abbreviated terms . 9
4 General requirements . 9
5 Classification . 10
6 Requirements for voltage converter units (VCUs) . 10
6.1 General . 10
6.2 Rated voltages and currents . 10
6.3 Requirement for AC/DC VCU for portable and mobile DRI EV supply
equipment . 10
6.4 Built-in DC/DC VCU for battery systems . 10
6.4.1 Built-in DC/DC VCU for battery systems (only AUX supply circuit) . 10
6.4.2 Built-in DC/DC VCU for removable battery systems (IEC PAS 62840-3). 11
7 Marking and instructions . 11
8 Protection against access to live parts . 11
9 Starting of motor-operated appliances . 12
10 Power input and current . 12
11 Heating . 12
12 Void . 12
13 Leakage current and electric strength at operating temperature . 12
14 Transient overvoltages . 12
15 Moisture resistance . 12
16 Leakage current and electric strength . 13
17 Overload protection of transformers and associated circuits . 13
18 Endurance . 13
19 Abnormal operation . 13
20 Stability and mechanical hazards . 13
21 Mechanical strength . 13
22 Construction . 13
23 Internal wiring . 14
24 Components . 14
25 Supply connection and external flexible cords . 14
26 Terminals for external conductors . 15
27 Provision for earthing . 15
28 Screws and connections . 15
29 Clearances, creepage distances and solid insulation . 15
30 Resistance to heat and fire . 15
31 Resistance to rusting . 16
32 Radiation, toxicity and similar hazards . 16

Annexes . 17
Annex AA (normative) Supply systems circuit diagrams . 18
AA.1 Standard supply systems circuit diagrams using NFC . 18
AA.1.1 General . 18
AA.1.2 EV supply system configuration type C, case A, accessories 4-II . 18
AA.1.3 EV supply system configuration type B, case B portable or mobile DRI
EV supply equipment, accessories 4-II . 20
AA.1.4 EV supply system configuration type D, accessories 4-II . 20
AA.2 EV supply system configuration type B, case B, coupler 4-I and 4-III . 21
AA.3 EV supply system conversion device using NFC . 22
AA.3.1 EV supply system configuration type C, case A, type 4-II, EV supply
system conversion device . 22
AA.3.2 EV supply system configuration type C, case B, accessories 4-II, EV

supply system conversion device . 22
AA.4 EV supply system conversion device configuration type B, case B, type 4-I
and 4-III . 23
Annex BB (informative) Examples of VCU wirings . 24
BB.1 AC/DC VCU for portable or mobile DRI EV supply equipment . 24
BB.2 Built-in DC/DC VCU for battery systems (only AUX supply circuit) . 25
BB.3 Built-in DC/DC VCU for removable battery systems (IEC PAS 62840-3) . 25
Annex CC (informative) Current and voltage regulation . 26
CC.1 Current and voltage regulation, AC/DC VCU . 26
CC.2 Current and voltage regulation, DC/DC VCU . 27
CC.3 Current and voltage regulation, DC/DC VCU for removable battery systems . 29
Annex DD (normative) Applicable requirements and tests of IEC 60335-2-29 . 31
Bibliography . 35

Figure AA.1 – EV supply system configuration type C, case A, accessories 4-II . 19
Figure AA.2 – EV supply system configuration type B, case B portable or mobile DRI
EV supply equipment, accessories 4-II . 20
Figure AA.3 – EV supply system configuration type D, accessories 4-II . 21
Figure AA.4 – EV supply system configuration type B, case B, coupler 4-I and 4-III . 21
Figure AA.5 – EV supply system configuration type C, case A, accessories 4-II, EV

supply system conversion device . 22
Figure AA.6 – EV supply system configuration type C, case B, accessories 4-II,
manufacturer device . 22
Figure AA.7 – EV supply system conversion device configuration type B, case B, 4-I
and 4-III . 23
Figure BB.1 – AC/DC VCU for portable and mobile DRI EV supply equipment, +60 V or

–120 V output . 24
Figure BB.2 – Built-in DC/DC VCU: battery system (generation of internal AUX supply
circuit) . 25
Figure BB.3 – Built-in DC/DC VCU for removable battery systems (IEC PAS 62840-3) . 25
Figure CC.1 – Current and voltage regulation, AC/DC VCU . 27
Figure CC.2 – Current and voltage regulation, DC/DC VCU . 29
Figure CC.3 – Current and voltage regulation, DC/DC VCU for removable battery
systems . 30

Table DD.1 – Applicable requirements and tests according to IEC 60335-2-29 . 31

– 4 – IEC TS 61851-3-2:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC VEHICLE CONDUCTIVE CHARGING SYSTEM –

Part 3-2: DC EV supply equipment where protection relies
on double or reinforced insulation – Particular requirements
for portable and mobile equipment

FOREWORD
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