CLC 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

This part of IEC 61851-3 series (in a first step as Technical Specification for three-year period) together with part 1 of IEC61851-3, applies to the d.c. power supply equipment (e.g. VCU) for the conductive transfer of electric power between the supply network and an light electric road vehicle when connected to the supply network , with a rated supply voltage up to 480 V a.c. or up to 400 V d.c. and a rated ìoutputî voltage up to 480 V a.c. or up to 200 V d.c. The supply systems described in the IEC 61851-3 series are primarily intended for the use by EVs of category L hereinafter referred to as light electric vehicles (light EVs). NOTE 1 Light EV includes all electrically propelled two and three wheeled vehicles of Category L1 up to Category L7 according to the definition of ECE-TRANS-WP29-78r2e and all electrically propelled or assisted cycles. The electrical protection of the complete light EV supply system from the connection to the supply network up to the light EV or removed RESS complies with protective separation and with galvanic separation between a.c. input and d.c. output or class III.

Konduktive Ladesysteme für Elektrofahrzeuge - Teil 3-2: Gleichstrom-Versorgungseinrichtungen für Elektrofahrzeuge mit Schutzwirkung durch doppelte oder verstärkte Isolierung - Besondere Anforderungen für tragbare und ortsveränderliche Betriebsmittel

Système de charge conductive pour véhicules électriques - Partie 3-2 : Exigences relatives aux véhicules électriques légers - Matériel de charge conductive en courant continu

Sistemi za napajanje električnih vozil - 3-2. del: Oprema za napajanje električnih vozil z enosmernim tokom, kjer varnost zagotavlja dvojna ali ojačena izolacija - Posebne zahteve za prenosno in mobilno opremo (IEC/TS 61851-3-2:2023)

Ta del skupine standardov IEC 61851-3 (v prvem koraku kot tehnične specifikacije za triletno obdobje) skupaj s 1. delom standarda IEC 61851-3 se uporablja za opremo za napajanje z enosmernim tokom (npr. VCU) za konduktivni prenos električne energije med električnim omrežjem in lahkim električnim cestnim vozilom, ko je to priključeno na električno omrežje z nazivno izmenično napetostjo napajanja do 480 V ali enosmerno napetostjo do 400 V in nazivno izhodno izmenično napetostjo do 480 V oziroma izhodno enosmerno napetostjo do 200 V.
Napajalni sistemi, opisani v skupini standardov IEC 61851-3, so namenjeni predvsem uporabi električnih vozil kategorije L, v nadaljevanju lahka električna vozila.
OPOMBA 1: Lahko električno vozilo pomeni vsa dvo- in trikolesna vozila na električni pogon kategorij L1 do vključno L7 v skladu z definicijo ECE-TRANS-WP29-78r2e in vsa kolesa na električni pogon in kolesa s pomožnim motorjem.
Električna zaščita celotnega napajalnega sistema lahkega električnega vozila od priključka na električno omrežje do lahkega električnega vozila ali odstranjenega sistema za shranjevanja energije z možnostjo ponovnega polnjenja je skladna z zaščitno ločitvijo in z galvansko ločitvijo med vhodnim izmeničnim tokom in izhodnim enosmernim tokom oziroma opremo razreda III.

General Information

• Status: Published
• Publication Date: 21-Dec-2023
• ICS: 43.120 - Electric road vehicles
• Technical Committee: CLC/TC 69X - Electrical systems for electric road vehicles
• Drafting Committee: IEC/TC 69 - IEC_TC_69
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 22-Dec-2023
• Completion Date: 22-Dec-2023
• Directive: 2014/94/EU - Directive 2014/94/EU of The European Parliament and of The Council of 22 October 2014 on the deployment of alternative fuels infrastructure
• Mandate: M/533 - [C(2015)1330] Standardisation request addressed to CEN, CENELEC and ETSI in support of the implementation of the Directive 2014/94/EU on the deployment of alternative fuels infrastructure
• Ref Project: SIST-TS CLC IEC/TS 61851-3-2:2024 - 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)

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2024
Sistemi za napajanje električnih vozil - 3-2. del: Oprema za napajanje električnih
vozil z enosmernim tokom, kjer varnost zagotavlja dvojna ali ojačena izolacija -
Posebne zahteve za prenosno in mobilno opremo (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)
Konduktive Ladesysteme für Elektrofahrzeuge - Teil 3-2: Gleichstrom-
Versorgungseinrichtungen für Elektrofahrzeuge mit Schutzwirkung durch doppelte oder
verstärkte Isolierung - Besondere Anforderungen für tragbare und ortsveränderliche
Betriebsmittel (IEC/TS 61851-3-2:2023)
Système de charge conductive pour véhicules électriques - Partie 3-2 : Exigences
relatives aux véhicules électriques légers - Matériel de charge conductive en courant
continu (IEC/TS 61851-3-2:2023)
Ta slovenski standard je istoveten z: CLC IEC/TS 61851-3-2:2023
ICS:
43.120 Električna cestna vozila Electric road vehicles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION CLC IEC/TS 61851-3-2

SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION December 2023
ICS 43.120
English Version
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)
Système de charge conductive pour véhicules électriques - Konduktive Ladesysteme für Elektrofahrzeuge - Teil 3-2:
Partie 3-2 : Exigences relatives aux véhicules électriques Gleichstrom-Versorgungseinrichtungen für
légers - Matériel de charge conductive en courant continu Elektrofahrzeuge mit Schutzwirkung durch doppelte oder
(IEC/TS 61851-3-2:2023) verstärkte Isolierung - Besondere Anforderungen für
tragbare und ortsveränderliche Betriebsmittel
(IEC/TS 61851-3-2:2023)
This Technical Specification was approved by CENELEC on 2023-12-04.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force.

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,
Türkiye 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC IEC/TS 61851-3-2:2023 E

European foreword
This document (CLC IEC/TS 61851-3-2:2023) consists of the text of IEC/TS 61851-3-2:2023,
prepared by IEC/TC 69 "Electrical power/energy transfer systems for electrically propelled road
vehicles and industrial trucks”.
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 standardization request addressed to CENELEC by the
European Commission. The Standing Committee of the EFTA States subsequently approves these
requests for its Member States.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Technical Specification IEC/TS 61851-3-2:2023 was approved by
CENELEC as a European Technical Specification without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60309 series NOTE Approved as EN IEC 60309 series
IEC 60364-7-722:2018 NOTE Approved as HD 60364-7-722:2018
IEC 60990:2016 NOTE Approved as EN 60990:2016 (not modified)
ISO 18246:2023 NOTE Approved as EN ISO 18246:2023 (not modified)
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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60038 - IEC standard voltages EN 60038 -
IEC 60335-1 2020 Household and similar electrical appliances - -
- Safety - Part 1: General requirements
IEC 60335-2-29 2016 Household and similar electrical appliances EN 60335-2-29 2021
(mod) - Safety - Part 2-29: Particular requirements
for battery chargers
+ A1 2019 + A1 2021
IEC 60529 - Degrees of protection provided by - -
enclosures (IP Code)
IEC/TS 61851-3-1 2023 Electric vehicles 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
IEC/TS 62196-4 2022 Plugs, socket-outlets, vehicle connectors - -
and vehicle inlets - Conductive charging of
electric vehicles - Part 4: Dimensional
compatibility and interchangeability
requirements for DC pin and contact-tube
accessories for Class II or Class III
applications
CiA 454-12 - CANopen application profile for energy - -
management systems - Part 12: Gateway
unit
Under preparation.
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

IEC TS 61851-3-2:2023 © IEC 2023 – 3 –
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
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC TS 61851-3-2 has been prepared by IEC technical committee 69: Electrical power/energy
transfer systems for electrically road vehicles and industrial trucks. It is a Technical
Specification.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
69/846/DTS 69/883/RVDTS
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Specification is English.

IEC TS 61851-3-2:2023 © IEC 2023 – 5 –
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
This part is to be used in conjunction with IEC 60335-2-29:2016 and IEC 60335-1:2020.
The clauses of the particular requirements in this document supplement or modify the
corresponding clauses of IEC 60335-2-29:2016 and IEC 60335-1:2020. Where the text
indicates an "addition" to or a "replacement" of the relevant requirement, test specification or
explanation of IEC 60335-2-29:2016 and IEC 60335-1:2020, these changes are made to the
relevant text of IEC 60335-2-29:2016 and IEC 60335-1:2020, which then becomes part of this
document. Where no change is necessary, the words "The xxx of portable and mobile DRI EV
supply equipment shall be in accordance with the relevant requirements (for class II appliances
or heating appliances) of IEC 60335-2-29:2016" are used, where "xxx" represents the relevant
title of the clause referred to. See also Annex DD. Additional annexes are lettered AA, BB, CC
and DD.
In this document, the following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
A list of all parts in the IEC 61851 all parts, published under the general title Electric vehicles
conductive charging system, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.
– 6 – IEC TS 61851-3-2:2023 © IEC 2023
INTRODUCTION
This document is published in separate parts according to the following structure:
IEC TS 61851-3-1, 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
IEC TS 61851-3-2, 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 61851-3-4, Electric vehicle conductive charging system – Part 3-4: DC EV supply
equipment where protection relies on double or reinforced insulation – General definitions and
requirements for CANopen communication
IEC TS 61851-3-5, Electric vehicle conductive charging system – Part 3-5: DC EV supply
equipment where protection relies on double or reinforced insulation – Pre-defined
communication parameters and general application objects
IEC TS 61851-3-6, Electric vehicle conductive charging system – Part 3-6: DC EV supply
equipment where protection relies on double or reinforced insulation – Voltage converter unit
communication
IEC TS 61851-3-7, Electric vehicle conductive charging system – Part 3-7: DC EV supply
equipment where protection relies on double or reinforced insulation – Battery system
communication
IEC TS 61851-3-2:2023 © IEC 2023 – 7 –
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

1 Scope
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.
NOTE 1 In the following countries, the acceptable nominal supply voltage is up to 600 V AC: CA, US.
NOTE 2 These specified rated input and output voltages supersede all references.
This document applies to
• VCUs intended to be a part of portable and mobile DRI EV supply equipment,
• portable and mobile DRI EV supply equipment according to the IEC 61851-3 series intended
to be installed and/or used at an altitude of up to 2 000 m, and
• portable and mobile DRI EV supply equipment for the conductive transfer of electric power
between the supply network and an electric road vehicle/RESS according to the
IEC 61851-3 series intended to be connected to vehicles where the vehicle power supply
circuit is protected against electric shock by double or reinforced insulation.
NOTE 3 For information regarding protection against electric shock by double or reinforced insulation of the EV or
of the vehicle power supply circuit, see ISO 18246:2023, 6.1.1 b) and Table 3.
The aspects covered in this document include
• the characteristics and operating conditions of the portable and mobile DRI EV supply
equipment,
• the specification for required level of electrical safety for the portable and mobile DRI EV
supply equipment,
• requirements for bidirectional power transfer from DC to DC, and
• requirements for command and control basic communication for safety and process matters,
if required.
This document does not apply to
• safety aspects related to maintenance, and
• electrical devices and components, which are covered by their specific product standards.

– 8 – IEC TS 61851-3-2:2023 © IEC 2023
2 Normative references
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.
IEC 60038, IEC standard voltages
IEC 60335-1:2020, Household and similar electrical appliances – Safety – Part 1: General
requirements
IEC 60335-2-29:2016, Household and similar electrical appliances – Safety – Part 2-29:
Particular requirements for battery chargers
IEC 60335-2-29:2016/AMD1:2019
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC TS 61851-3-1:2023, 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
IEC TS 62196-4:2022, Plugs, socket-outlets, vehicle connectors and vehicles inlets –
Conductive charging of electric vehicles – Part 4: Dimensional compatibility and
interchangeability requirements for DC pin and contact-tube accessories for class II or class III
applications
CiA 454-12, CANopen application profile for energy management systems – Part 12: Gateway
unit, available at www.can-cia.org
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC TS 61851-3-1:2023
apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
protective impedance
impedance connected between live parts and accessible conductive parts of class II
constructions so that the current, in normal use and under likely fault conditions in the
appliance, is limited to a safe value
[SOURCE: IEC 60335-1:2020, 3.3.6]
___________
Under preparation.
IEC TS 61851-3-2:2023 © IEC 2023 – 9 –
3.2 Symbols and abbreviated terms
AC alternating current
DC direct current
EMS energy management system
EMSC energy management system controller
IMD insulation monitoring device
EV electric vehicle
NFC near field communication
VCU voltage converter unit
4 General requirements
Portable and mobile DRI EV supply equipment shall be constructed so that, in normal use, they
function safely so as to cause no danger to persons or surroundings, even in the event of
carelessness that may occur in normal use.
Compliance is checked by meeting all of the relevant requirements of this document.
Annex DD provides references to applicable requirements and tests to the relevant clauses of
IEC 60335-2-29:2016.
The portable and mobile DRI EV supply equipment may have one or more "connecting points"
according to IEC 60364-7-722:2018 that are used for energy supply to electric vehicle. This
includes socket-outlets (case A or case B) and/or cord sets attached with vehicle connectors
(case C). Each connecting point shall have its own dedicated protection means.
Each connecting point shall be supplied by its own safety isolating transformer according to
IEC TS 61851-3-1:2023, 7.1.1.
Measures for fault protection are specified in IEC TS 61851-3-1:2023, 9.3.
Unless otherwise specified, the tests are carried out in accordance with Clause 5.
Unless otherwise specified, all tests indicated in this document are type tests.
NOTE 1 Routine tests are carried out for portable and mobile DRI EV supply equipment, according to
IEC 60335-1:2020, Annex A.
Unless otherwise specified, all tests shall be carried out in the order of the clauses and
subclauses in this document.
The tests of IEC 60335-2-29:2016, Clause 5, are carried out on one sample (portable and
mobile DRI EV supply equipment) that shall withstand all the relevant tests.
The DRI EV supply equipment shall be rated for one or a range of standard nominal voltages
as given in IEC 60038.
For the purpose of portable and mobile DRI EV supply equipment, IEC TS 61851-3-1:2023,
Clause 7 and Clause 8, apply.
NOTE 2 IEC TS 61851-3-1:2023, Figure 1, shows EV supply system configuration type A, B and D covering portable
and mobile DRI EV supply equipment.

– 10 – IEC TS 61851-3-2:2023 © IEC 2023
Compliance is tested according to IEC TS 61851-3-1:2023, Clause 7 and Clause 8.
5 Classification
For the purposes of this document, the classifications as given in IEC TS 61851-3-1:2023 apply.
6 Requirements for voltage converter units (VCUs)
6.1 General
Clause 6 covers requirements for VCUs for AC/DC or DC/DC conversion of electric power used
within the DRI EV supply equipment.
6.2 Rated voltages and currents
Standard ratings of voltages and currents shall be in accordance with IEC TS 61851-3-1:2023,
7.2.
Compliance shall be verified by inspection.
NOTE Current and voltage regulation is shown in Annex CC.
6.3 Requirement for AC/DC VCU for portable and mobile DRI EV supply equipment
The AC/DC VCU for portable and mobile DRI EV supply equipment provides AC input voltage
(side A) according to IEC TS 61851-3-1:2023, Table 2, and DC output voltages (side B)
according to IEC TS 61851-3-1:2023, Table 3.
AC/DC VCUs for portable and mobile DRI EV supply equipment provides AUX voltage for AUX
supply circuit at side B.
AC/DC VCUs for portable and mobile DRI EV supply equipment intended for maximum output
voltage of +60 V DC to the DC power circuits on side B by the following connection:
• DC +60 V;
• DC 0 V.
AC/DC VCUs for portable and mobile DRI EV supply equipment intended for maximum output
voltage of –120 V DC to the DC power circuits on side B by the following connection:
• DC 0 V;
• DC –120 V.
NOTE Example for wiring and insulation of AC/DC VCU for portable and mobile DRI EV supply equipment is shown
in Figure BB.1.
6.4 Built-in DC/DC VCU for battery systems
6.4.1 Built-in DC/DC VCU for battery systems (only AUX supply circuit)
DC/DC VCUs for battery systems provides AUX voltage for AUX supply circuit at side A.
Providing AUX voltage for AUX supply circuit at side B is optional.
NOTE Example for wiring and insulation of built-in DC/DC VCU for battery systems is shown in Figure BB.2.

IEC TS 61851-3-2:2023 © IEC 2023 – 11 –
6.4.2 Built-in DC/DC VCU for removable battery systems (IEC PAS 62840-3)
The built-in DC/DC VCU for removable battery systems provides DC output voltage (side A)
according to Annex AA and DC battery system maximum voltage (side B) according to the
specification of the manufacturer.
Built-in DC/DC VCUs for removable battery systems provides AUX voltage for AUX supply
circuit at side A. Providing AUX voltage for AUX supply circuit at side B is optional.
NOTE Example for wiring and insulation of built-in DC/DC VCU for removable battery systems is shown in
Figure BB.3.
7 Marking and instructions
IEC 60335-2-29:2016 and IEC 60335-2-29:2016/AMD1:2019, Clause 7, applies.
Compliance is tested in accordance with IEC 60335-2-29:2016 and
IEC 60335-2-29:2016/AMD1:2019, Clause 7.
See also Table DD.1.
8 Protection against access to live parts
The protection against access to live parts of portable and mobile DRI EV supply equipment
shall be in accordance with requirements for class II appliances of IEC 60335-2-29 and
IEC 60335-2-29:2016/AMD1:2019, Clause 8.
See also Table DD.1.
IEC 60335-1:2020, Clause 8, applies, except as follows.
8.1.4
Replacement:
8.1.4.1 An accessible live part is not considered to be live if
– the part is supplied at safety extra-low voltage, provided that,
• for AC, the RMS value of the voltage does not exceed 30 V, and
• for DC, the voltage does not exceed 60 V, or
– the part is separated from live parts by protective impedance.
If protective impedance is used, the current between the part and the supply source shall not
exceed 2 mA for DC; its peak value shall not exceed 0,7 mA for AC and
– for voltages having a peak value over 42,4 V up to and including 450 V, the capacitance
shall not exceed 0,1 µF;
– for voltages having a RMS value over 450 V up to and including 15 kV, the discharge shall
not exceed 45 µC.
Compliance is checked by measurement, the appliance being supplied at rated voltage.
Voltages and currents are measured between the relevant parts and each pole of the supply
source. Discharges are measured immediately after the interruption of the supply. The quantity
of electricity and energy in the discharge is measured using a resistor having a nominal non-
inductive resistance of 2 000 Ω.

– 12 – IEC TS 61851-3-2:2023 © IEC 2023
NOTE 1 Details of a suitable circuit for measuring the current are given in IEC 60990:2016, Figure 4.
NOTE 2 The quantity of electricity is calculated from the sum of all areas recorded on the voltage/time graph without
taking voltage polarity into account.
8.1.4.2 VCUs
Live parts of VCUs delivered in separate units shall be protected at least by basic insulation
before integrating into DRI EV supply equipment and are tested as a complete assembly
according to IEC TS 61851-3-1.
9 Starting of motor-operated appliances
Clause 9 of IEC 60335-2-29:2016 and IEC 60335-1:2010 is not applicable.
10 Power input and current
Clause 10 of IEC 60335-2-29:2016 and IEC 60335-2-29:2016/AMD1:2019, and
IEC 60335-1:2020 is not applicable.
11 Heating
The relevant requirements for heating appliances of IEC 60335-2-29:2016 and
IEC 60335-2-29:2016/AMD1:2019, Clause 11, apply.
Compliance is tested in accordance with the relevant requirements for heating appliances of
IEC 60335-2-29:2016 and IEC 60335-2-29:2016/AMD1:2019. See also Table DD.1.
12 Void
13 Leakage current and electric strength at operating temperature
The relevant requirements for class II appliances of IEC 60335-2-29:2016, Clause 13, apply.
Compliance is tested in accordance with the relevant clause for class II appliances of
IEC 60335-2-29:2016 and IEC 60335-2-29:2016/AMD1:2019. See also Table DD.1.
14 Transient overvoltages
Clause 14 of IEC 60335-2-29:2016 and IEC 60335-1:2020 is applicable.
Compliance is tested in accordance with IEC 60335-2-29:2016, Clause 14. See also Table DD.1.
15 Moisture resistance
The relevant requirements of IEC 60335-2-29:2016, Clause 15, apply.
Compliance is tested in accordance with the relevant clause of IEC 60335-2-29:2016. See also
Table DD.1.
IEC 60335-1:2020, Clause 15, is applicable, except as follows.

IEC TS 61851-3-2:2023 © IEC 2023 – 13 –
15.1.1
Replacement:
15.1.1 Protection against ingress of water
Portable and mobile DRI EV supply equipment is subjected to the tests of IEC 60529 as follows:
– for portable or mobile DRI EV supply equipment, at least IPX5 is required.
Compliance is tested in accordance with the relevant clause of IEC 60529. See also Table DD.1.
16 Leakage current and electric strength
The relevant requirements for class II appliances of IEC 60335-2-29:2016, Clause 16, apply.
Compliance is tested in accordance with the relevant clause for class II appliances of
IEC 60335-2-29:2016 and IEC 60335-2-29:2016/AMD1:2019. See also Table DD.1.
17 Overload protection of transformers and associated circuits
Clause 17 of IEC 60335-2-29:2016 and IEC 60335-1:2020 is applicable.
Compliance is tested in accordance with the relevant clause of IEC 60335-2-29:2016 and
IEC 60335-2-29:2016/AMD1:2019. See also Table DD.1.
18 Endurance
Clause 18 of IEC 60335-2-29:2016 and IEC 60335-1:2020 is not applicable.
19 Abnormal operation
IEC 60335-2-29:2016, Clause 19, is applicable.
Compliance is tested in accordance with IEC 60335-2-29:2016, Clause 19. See also Table DD.1.
20 Stability and mechanical hazards
IEC 60335-2-29:2016, Clause 20, is applicable.
Compliance is tested in accordance with IEC 60335-2.29:2016, Clause 20. See also Table DD.1.
21 Mechanical strength
IEC 60335-2-29:2016, Clause 21, is applicable.
Compliance is tested in accordance with IEC 60335-2-29:2016 and
IEC 60335-2-29:2016/AMD1:2019, Clause 21. See also Table DD.1.
22 Construction
IEC 60335-2-29:2016 and IEC 60335-2-29:2016/AMD1:2019, Clause 22, is applicable.

– 14 – IEC TS 61851-3-2:2023 © IEC 2023
Compliance is tested in accordance with IEC 60335-2-29:2016 and
IEC 60335-2-29:2016/AMD1:2019, Clause 22. See also Table DD.1.
23 Internal wiring
The relevant requirements for class II appliances of IEC 60335-2-29:2016, Clause 23, apply.
Compliance is tested in accordance with the relevant requirements for class II appliances of
IEC 60335-2-29:2016. See also Table DD.1.
24 Components
The relevant requirements for class II appliances of IEC 60335-2-29:2016 and
IEC 60335-2-29:2016/AMD1:2019, Clause 24, apply.
Compliance is tested in accordance with the relevant requirements for class II appliances of
IEC 60335-2-29:2016 and IEC 60335-2-29:2016/AMD1:2019. See also Table DD.1.
IEC 60335-1:2020, Clause 24, is applicable, except as follows.
24.4
Replacement:
24.4 Plugs and socket-outlets and vehicle couplers
Plugs and socket-outlets and vehicle couplers for EV supply systems type A to F shall be in
accordance with the relevant requirements of IEC TS 61851-3-1:2023, 7.1.
Compliance is checked by inspection.
25 Supply connection and external flexible cords
The relevant requirements for class II appliances of IEC 60335-2-29:2016, Clause 25, apply.
Compliance is tested in accordance with the relevant requirements for class II appliances of
IEC 60335-2-29:2016 and IEC 60335-2-29:2016/AMD1:2019. See also Table DD.1.
IEC 60335-1:2020, Clause 25, is applicable, except as follows.
25.1
Replacement:
25.1 Portable and mobile DRI EV supply equipment
Portable and mobile DRI EV supply equipment, other than those intended to be permanently
connected to fixed wiring, shall be provided with one of the following means for connection to
the supply mains:
– at the side A (e.g. see Figure BB.1), supply cord fitted with a plug according to the relevant
requirements of IEC TS 61851-3-1:2023, 7.1, the current rating and voltage rating of the
plug and the supply cord being not less than the corresponding ratings of its associated
portable and mobile DRI EV supply equipment;

IEC TS 61851-3-2:2023 © IEC 2023 – 15 –
– at the side B (e.g. see Figure BB.1), cord fitted with a vehicle connector according to
IEC TS 62196-4:2022, the current rating and voltage rating of the vehicle connector and the
supply cord being not less than the corresponding ratings of its associated portable and
mobile DRI EV supply equipment;
– the length of the cord shall comply with the relevant requirements of
IEC TS 61851-3-1:2023, 11.3.
All cables connected to the portable and mobile DRI EV supply equipment shall in addition
comply with IEC TS 61851-3-1:2023, 11.3.
Compliance is checked by inspection.
Replacement of 25.22, 25.23 and 25.24:
25.22 Portable and mobile DRI EV supply equipment inlets and interconnection cords
Portable and mobile DRI EV supply equipment inlets and interconnection cords shall not be
used at the portable and mobile DRI EV supply equipment in accordance with the relevant
requirements for EV supply systems configuration type "A", "B" and "D" according to
IEC TS 61851-3-1:2023, 7.1
Compliance is checked by inspection.
26 Terminals for external conductors
The relevant requirements for class II appliances of IEC 60335-2-29:2016, Clause 26, apply.
Compliance is tested in accordance with the relevant requirements for class II appliances of
IEC 60335-2-29:2016 and IEC 60335-2-29:2016/AMD1:2019. See also Table DD.1.
27 Provision for earthing
IEC 60335-2-29:2016, Clause 27, is not applicable.
28 Screws and connections
IEC 60335-2-29:2016, Clause 28, is applicable.
Compliance is tested in accordance with IEC 60335-2-2
...