SIST EN ISO 18246:2023

SLOVENSKI STANDARD
01-junij-2023
Mopedi in motorna kolesa na električni pogon - Varnostne zahteve za prevodno
(kabelsko) priključitev na zunanje električno napajanje (ISO 18246:2023)
Electrically propelled mopeds and motorcycles - Safety requirements for conductive
connection to an external electric power supply (ISO 18246:2023)
Elektrisch angetriebene Mopeds und Motorräder - Sicherheitsanforderungen für die
leitende Verbindung mit einer externen Energieversorgung (ISO 18246:2023)
Cyclomoteurs et motocycles à propulsion électrique - Exigences de sécurité relatives au
couplage conductif à une station extérieure d'alimentation d'énergie externe (ISO
18246:2023)
Ta slovenski standard je istoveten z: EN ISO 18246:2023
ICS:
43.140 Motorna kolesa in mopedi Motorcycles and mopeds
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 18246
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2023
EUROPÄISCHE NORM
ICS 43.140 Supersedes EN ISO 18246:2017
English Version
Electrically propelled mopeds and motorcycles - Safety
requirements for conductive connection to an external
electric power supply (ISO 18246:2023)
Cyclomoteurs et motocycles à propulsion électrique - Elektrisch angetriebene Mopeds und Motorräder -
Exigences de sécurité relatives au couplage conductif à Sicherheitsanforderungen für die leitende Verbindung
une station extérieure d'alimentation d'énergie externe mit einer externen Energieversorgung (ISO
(ISO 18246:2023) 18246:2023)
This European Standard was approved by CEN on 24 March 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18246:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 18246:2023) has been prepared by Technical Committee ISO/TC 22 "Road
vehicles" in collaboration with Technical Committee CEN/TC 301 “Road vehicles” the secretariat of
which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by October 2023, and conflicting national standards shall
be withdrawn at the latest by October 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 18246:2017.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 18246:2023 has been approved by CEN as EN ISO 18246:2023 without any modification.

INTERNATIONAL ISO
STANDARD 18246
Second edition
2023-01
Electrically propelled mopeds and
motorcycles — Safety requirements
for conductive connection to an
external electric power supply
Cyclomoteurs et motocycles à propulsion électrique — Exigences de
sécurité relatives au couplage conductif à une borne d'alimentation
électrique externe
Reference number
ISO 18246:2023(E)
ISO 18246:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 18246:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 General . 2
3.2 Charging . 4
3.3 Connection . 5
3.4 Electrical safety . 6
4 Environmental and operational conditions . 9
5 General requirements .10
6 Connection between the plug or vehicle couplers and RESS of the vehicle .10
6.1 General . 10
6.1.1 Connections among charger, RESS, and vehicle. 10
6.1.2 General requirements for connection .12
6.1.3 Requirements for connection or no connection to the earth .12
6.1.4 Specific requirements for the vehicle inlet . 18
6.1.5 Vehicle behaviour during charging . 19
6.2 AC connection . 19
6.2.1 Requirements for the connection to AC supply network (mains). 19
6.2.2 Requirements of connection and/or disconnection process in AC contacts. 19
6.2.3 Protection from unintended voltage for AC connection . 19
6.2.4 Additional requirements for AC electric power supply .20
6.3 DC connection . . 20
6.3.1 Requirements of connection and/or disconnection process in DC contacts .20
6.3.2 Protection from unintended voltage for DC connection .20
6.3.3 Specific requirements .20
7 Protection against electric shock .21
7.1 General requirements . 21
7.1.1 General requirements for connected sections of a circuit . 21
7.1.2 General requirements for voltage class A . 21
7.1.3 General requirements for voltage class B . 21
7.2 Basic protection . 21
7.3 Fault protection and additional measures . 21
7.3.1 Equipotential bonding . 21
7.3.2 Alternative protection measures . 22
7.3.3 Requirements for protective barrier or enclosures .22
7.3.4 Requirements for insulation . 23
7.4 Protection against access to hazardous-live-parts . 23
7.4.1 General .23
7.4.2 Requirements of the degree of protection of barrier/enclosures against
electric shock . 23
7.5 Insulation coordination . 23
7.5.1 AC connection . 23
7.5.2 DC connection . 24
7.6 Touch current. 24
8 Protection against thermal incident .24
8.1 Overcurrent protection . 24
8.1.1 Overload protection. 24
8.1.2 Short circuit protection for AC connection . 24
8.1.3 Short-circuit protection for DC connection . 25
iii
ISO 18246:2023(E)
8.2 Arc protection for DC connections . 25
8.3 Residual energy after disconnection . 25
9 Additional requirements and test procedure .25
9.1 General conditions on tests .25
9.2 Protection against ingress of solid foreign objects and water . 26
9.3 Withstand voltage test .26
9.3.1 General . 26
9.3.2 Test voltage. 26
9.3.3 Dielectric withstand voltage of voltage class A direct current part . 27
9.4 Isolation resistance . 27
9.4.1 General . 27
9.4.2 Additional measures at a non-maintained isolation resistance . 27
9.5 Creepage distance and clearance . 27
9.6 Requirements for the emission of hazardous gases and other hazardous substances . 27
9.7 Permissible surface temperature .28
9.8 Unintentional charging system behaviour .28
9.8.1 General .28
9.8.2 Unintended reverse power flow .28
9.9 Electromagnetic compatibility.28
9.9.1 Susceptibility .28
9.9.2 Emissions .28
9.10 Service .28
10 Marking, instructions, and indications .28
10.1 Marking .28
10.2 Legibility .29
10.3 Connection instructions. 29
10.4 Indication. 29
Annex A (informative) Charging types .30
Annex B (normative) EV connected to DC EV supply equipment according to IEC 61851-25 .34
Annex C (normative) Connection of an EV to a DRI EV supply equipment according to the
IEC TS 61851-3 series.36
Bibliography .37
iv
ISO 18246:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 38,
Motorcycles and mopeds, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 301, Electrically propelled road vehicles, in accordance with the Agreement
on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 18246:2015), which has been technically
revised.
The main changes are as follows:
— terms and definitions have been updated;
— requirements for protection against electric shock (Clause 7) have been rewritten;
— descriptions for additional requirements and test procedure (Clause 9) have been simplified;
— requirements for the specific DC charging systems have been described in the Annexes (Annex B for
IEC 61851-25 and Annex C for IEC TS 61851-3 series).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
v
ISO 18246:2023(E)
Introduction
This document prescribes basic safety requirements for electrically propelled mopeds and motorcycles,
which are called electrically propelled vehicles (EVs), for simplicity, while connected to an external
electric power supply. The safety requirements for off-board appliances/equipment are not described
1)
in this document.
This document does not standardize specific charging method in the body text. The requirements for
specific DC charging systems are described in Annex B and Annex C.
Moped and motorcycle are defined in ISO 3833:1977, 3.4 and 3.5.
1) See IEC 60335-2-29, IEC 61851-25, and IEC TS 61851-3 series.
vi
INTERNATIONAL STANDARD ISO 18246:2023(E)
Electrically propelled mopeds and motorcycles — Safety
requirements for conductive connection to an external
electric power supply
1 Scope
This document specifies safety requirements for conductive connection of electrically propelled
mopeds and motorcycles (referred to as the EVs) to external electric circuits.
NOTE 1 External electric circuits include external electric power supplies and external electric loads.
It does not provide comprehensive safety information for manufacturing, maintenance and repair
personnel.
It applies only to on-board charging systems between the plug or vehicle inlet and RESS circuits.
NOTE 2 The requirements when not connected to external electric circuits are specified in the ISO 13063
series.
Requirements for bidirectional energy transfer DC to AC are under consideration and are not part of
this document.
NOTE 3 The safety requirements for DC EV supply equipment where protection relies on electrical separation
are specified in IEC 61851-25.
NOTE 4 The safety requirements for DC EV supply equipment where protection relies on double or reinforced
insulation are specified in IEC TS 61851-3-1 and IEC TS 61851-3-2.
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.
ISO 6469-3:2021, Electrically propelled road vehicles — Safety specifications — Part 3: Electrical safety
ISO 7010, Graphical symbols — Safety colours and safety signs — Registered safety signs
ISO 13063-3:2022, Electrically propelled mopeds and motorcycles — Safety specifications — Part 3:
Electrical safety
ISO 17409:2020, Electrically propelled road vehicles — Conductive power transfer — Safety requirements
ISO 20653, Road vehicles — Degrees of protection (IP code) — Protection of electrical equipment against
foreign objects, water and access
IEC 60664 SER, Insulation coordination for equipment within low-voltage systems — All Parts
IEC 61140:2016, Protection against electric shock — Common aspects for installation and equipment
IEC 61851-1:2017, Electric vehicle conductive charging system — Part 1: General requirements
IEC 61851-23, Electric vehicle conductive charging system — Part 23: DC electric vehicle charging station
IEC 61851-25:2020, Electric vehicle conductive charging system — Part 25: DC EV supply equipment where
protection relies on electrical separation
ISO 18246:2023(E)
2)
IEC/TS 61851-3-1:—, 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 62196-2, Plugs, socket-outlets, vehicle connectors and vehicle inlets — Conductive charging of electric
vehicles — Part 2: Dimensional compatibility and interchangeability requirements for a.c. pin and contact-
tube accessories
IEC/TS 62196-4, Plugs, socket-outlets, vehicle connectors and vehicle inlets — Conductive charging of
electric vehicles — Part 4: Dimensional compatibility and interchangeability requirements for d.c. pin and
contact-tube accessories for class II or class III applications
IEC 62196-6, Plugs, socket-outlets, vehicle connectors and vehicle inlets — Conductive charging of electric
vehicles — Part 6: Dimensional compatibility requirements for DC pin and contact-tube vehicle couplers for
DC EV supply equipment where protection relies on electrical separation
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1 General
3.1.1
electrically propelled vehicle
EV
vehicle with one or more electric drive(s) for vehicle propulsion
Note 1 to entry: In the context of this document, the term electrically propelled vehicle (EV) includes only moped
or motorcycle.
[SOURCE: ISO 13063-3:2022, 3.14, modified — Terminological entry "EV" and note 1 to entry are added.]
3.1.2
rechargeable energy storage system
RESS
rechargeable system that stores energy for delivery of electric energy for the electric drive
EXAMPLE Battery, capacitor, flywheel.
[SOURCE: ISO 13063-3:2022, 3.23]
3.1.3
removable RESS
RESS (3.1.2) that can be moved/removed from an EV (3.1.1) by hand (portable RESS) or with the
assistance of an installation/device (mobile RESS)
[SOURCE: EN 50604-1:2016 +A1: 2021, 3.18]
3.1.4
indoor use
intended for operation under normal ambient conditions in a building
[SOURCE: IEC 61851-1:2017, 3.6.1]
2) Under preparation. Stage at the time of publication: IEC 69/845/DTS:2022.
ISO 18246:2023(E)
3.1.5
outdoor use
capable of operating under specific range of outdoor conditions
[SOURCE: IEC 61851-1:2017, 3.6.2]
3.1.6
maximum working voltage
highest value of AC voltage (rms) or of DC voltage that can occur in an electric system under any normal
operating conditions according to the manufacturers’ specifications, disregarding transients and ripple
[SOURCE: ISO 13063-3:2022, 3.20]
3.1.7
voltage class A
classification of an electric component or circuit, if its maximum working voltage (3.1.6) is ≤30 V a.c. or
≤60 V d.c., respectively
Note 1 to entry: The values 60 V d.c. and 30 V a.c. are selected taking into account humid weather conditions.
3.1.8
voltage class B
classification of an electric component or circuit, if its maximum working voltage (3.1.6) is >30 and
≤1 000 V a.c. or >60 and ≤1 500 V d.c., respectively
Note 1 to entry: The values 60 V d.c. and 30 V a.c. are selected taking into account humid weather conditions.
3.1.9
electric chassis
conductive parts of a vehicle that are electrically connected and whose potential is taken as reference
[SOURCE: ISO 13063-3:2022, 3.11]
3.1.10
accessible part
part which can be touched by means of the standard test finger
[SOURCE: IEV 442-01-15, modified — "a" is deleted.]
3.1.11
degree of protection
protection provided by an enclosure against access, foreign objects and/or water and verified by
standardized test methods
EXAMPLE IPXXB (by test finger), IPXXC (by test rod), or IPXXD test wire (by test wire), in accordance with
ISO 20653
[SOURCE: ISO 20653:2013, 3.2, modified — EXAMPLES are added.]
3.1.12
single fault condition
condition in which one means for protection against electric shock is defective or one fault is present
which could cause a hazard
Note 1 to entry: If a single fault condition results in one or more other fault conditions, all are considered as one
single fault condition.
[SOURCE: IEC 61140:2016, 3.1.4]
ISO 18246:2023(E)
3.2 Charging
3.2.1
EV charging system
complete system including the EV supply equipment (3.2.5) and the EV functions that are required to
supply electric energy to an EV (3.1.1) for the purpose of charging
[SOURCE: IEC 61851-1:2017, 3.1.4]
3.2.2
on-board charging system
on-board sections of EV charging system (3.2.1), which may have dedicated control functions used for
the connection of the vehicle to an external electric circuit
3.2.3
on-board charging equipment
equipment or a combination of equipment in the on-board charging system (3.2.2)
3.2.4
external electric power supply
electric power source that is not part of the vehicle for supplying electric energy to an EV (3.1.1) using
an EV supply equipment (3.2.5)
[SOURCE: ISO 17409:2020, 3.28]
3.2.5
EV supply equipment
equipment or a combination of equipment providing dedicated functions to supply electric energy from
a fixed electrical installation or supply network to an EV (3.1.1) for the purpose of charging
[SOURCE: ISO 17409:2020, 3.25, modified — EXAMPLE 1 and 2 are not cited.]
3.2.6
charger
power converter that performs the necessary functions for charging a battery
3.2.7
charger assembly
power converter that performs the necessary functions for charging a battery, including cables
3.2.8
vehicle power supply circuit
voltage class B (3.1.8) electric circuit which includes all parts that are galvanically connected to the
vehicle inlet (case B, case C) or the plug (case A) and that is operational when connected to an external
electric power supply (3.2.4)
Note 1 to entry: Case A, case B and case C are defined in IEC 61851-1.
3.2.9
primary circuit
circuit in the charger (3.2.6) intended to be galvanically connected to a supply network (mains)
3.2.10
secondary circuit
circuit that has no direct connection to a primary circuit (3.2.9) and derives its power from a transformer,
converter or equivalent isolation device
[SOURCE: IEC 61851-23:2014, 3.112]
ISO 18246:2023(E)
3.2.11
RESS circuit
electric circuit which includes all live parts that are galvanically connected to the secondary circuits
(3.2.10) of the charger (3.2.6) and charging circuits of RESS (3.1.2), excluding propulsion circuits
3.2.12
control pilot circuit
circuit designed for the transmission of signals or communication between the EV (3.1.1) and the EV
supply equipment (3.2.5)
[SOURCE: IEC 61851-1:2017, 3.3.2, modified — Note 1 to entry was deleted.]
3.3 Connection
3.3.1
AC connection
connection at a vehicle inlet or plug, with an external AC power supply
3.3.2
DC connection
connection at a vehicle inlet or plug, with an external DC power supply
3.3.3
charging cable assembly
assembly consisting of flexible cable or cord fitted with a plug and/or a vehicle connector, that is used to
establish the connection between the EV (3.1.1) and the supply network or an EV charging station
Note 1 to entry: A cable assembly can be detachable or be a part of the EV or the EV charging station.
Note 2 to entry: A cable assembly can include one or more cables, with or without a fixed jacket, which can be in a
flexible tube, conduit or wire way.
3.3.4
socket-outlet
accessory having socket-contacts designed to engage with the pins of a plug and having terminals for
the connection of cables or codes
[SOURCE: IEC 61851-1:2017, 3.5.10]
3.3.5
plug
accessory having pins designed to engage with the contacts of a socket-outlet (3.3.4)
Note 1 to entry: It also incorporate means for the electrical connection and mechanical retention of flexible
cables or codes.
[SOURCE: IEV 442-03-01, modified — The second part of sentence is moved to Note 1 to entry.]
3.3.6
vehicle coupler
means enabling the connection and disconnection at will, of a flexible cable to an EV (3.1.1)
Note 1 to entry: It consists of two parts: a vehicle connector and a vehicle inlet.
3.3.7
vehicle connector
part integral with, or intended to be attached to, one flexible cable
[SOURCE: IEC 62196-1:2022, 3.56 modified — Terminological entry "electric vehicle connector" is not
cited.]
ISO 18246:2023(E)
3.3.8
vehicle inlet
part incorporated in, or fixed to, the EV (3.1.1)
[SOURCE: IEC 62196-1:2022, 3.57 modified — Terminological entry "electric vehicle inlet" is not cited,
and "electric vehicle" is replaced with "EV".]
3.3.9
RESS coupler
means enabling the connection and disconnection of RESS (3.1.2) to a flexible cable, an EV (3.1.1) or a
charger assembly (3.2.7)
Note 1 to entry: It consists of two parts: a RESS connector and a RESS inlet.
3.3.10
RESS connector
part of a RESS coupler (3.3.9) integral with, or intended to be attached to, a flexible cable, an EV (3.1.1)
or a charger assembly (3.2.7)
3.3.11
RESS inlet
part of a RESS coupler (3.3.9) incorporated in, or fixed to, RESS (3.1.2)
3.3.12
terminal
conductive part provided for the connection of a conductor to an accessory
[SOURCE: IEC 62196-1:2022, 3.50]
3.4 Electrical safety
3.4.1
live part
conductor or conductive part intended to be energized in normal use, but by convention, not the electric
chassis (3.1.9)
[SOURCE: ISO 6469-1:2019, 3.16]
3.4.2
hazardous-live-part
live part (3.4.1) which, under certain conditions, can give a harmful electric shock
[SOURCE: IEV 826–12–13]
3.4.3
basic protection
protection against electric shock under fault-free conditions
[SOURCE: IEC 61140:2016, 3.1.1]
3.4.4
fault protection
protection against electric shock under single-fault conditions (3.1.12)
[SOURCE: IEC 61140:2016, 3.1.2]
3.4.5
additional protection
protection against electric shock in addition to basic protection (3.4.3) and/or fault protection (3.4.4)
[SOURCE: IEC 61140:2016, 3.1.3]
ISO 18246:2023(E)
3.4.6
basic insulation
insulation of hazardous-live-parts (3.4.2) which provides basic protection (3.4.3)
Note 1 to entry: This concept does not apply to insulation used exclusively for functional purposes.
[SOURCE: IEV 195-06-06]
3.4.7
supplementary insulation
independent insulation applied in addition to basic insulation (3.4.6), for fault protection (3.4.4)
[SOURCE: IEV 195-06-07]
3.4.8
double insulation
insulation comprising both basic insulation (3.4.6) and supplementary insulation (3.4.7)
[SOURCE: IEV 195-06-08]
3.4.9
reinforced insulation
insulation of hazardous-live-parts (3.4.2) which provides a degree of protection (3.1.11) against electric
shock equivalent to double insulation (3.4.8)
Note 1 to entry: Reinforced insulation may comprise several layers which cannot be tested singly as basic
insulation or supplementary insulation.
[SOURCE: IEV 195-06-09]
3.4.10
galvanic separation
prevention of electric conduction between two electric circuits intended to exchange power and/or
signals
Note 1 to entry: Galvanic separation can be provided e.g. by an isolating transformer or an opto-coupler.
[SOURCE: IEV 151-12-26]
3.4.11
simple separation
separation between electric circuits or between an electric circuit and local earth by means of basic
insulation (3.4.6)
[SOURCE: IEC 61140:2016, 3.23]
3.4.12
protective separation
electrically protective separation
separation of one electric circuit from another by means of:
— double insulation (3.4.8); or
— basic insulation (3.4.6) and electrically protective screening (shielding); or
— reinforced insulation (3.4.9)
[SOURCE: IEC 61140:2016, 3.24]
ISO 18246:2023(E)
3.4.13
exposed conductive part
conductive part of equipment which can be touched and which is not normally live, but which can
become live when basic insulation (3.4.6) fails
[SOURCE: ISO 17409:2020, 3.26]
3.4.14
equipotential bonding
provision of electric connections between conductive parts, intended to achieve equipotentiality
[SOURCE: IEV 195-01-10]
3.4.15
equipotential bonding terminal
terminal (3.3.12) provided on equipment or on a device and intended for the electric connection with
the equipotential bonding system
[SOURCE: IEV 195-02-32]
3.4.16
protective conductor
conductor provided for the purposes of safety, for example protection against electric shock
[SOURCE: IEC 61140:2016, 3.16.4]
3.4.17
PE conductor
protective conductor (3.4.16) provided for protective earthing
[SOURCE: IEC 61140:2016, 3.16.5]
3.4.18
residual current device
RCD
mechanical switching device designed to make, carry and break currents under normal service
conditions and to cause the opening of the contacts when the residual current attains a given value
under specified conditions
Note 1 to entry: A residual current device can be a combination of various separate elements designed to detect
and evaluate the residual current and to make and break current.
[SOURCE: IEV 442-05-02]
3.4.19
isolation resistance monitoring system
system that monitors the isolation resistance between live parts (3.4.1) and the electric chassis (3.1.9) or
exposed conductive parts (3.4.13)Table 1 provides an alphabetical cross-reference listing of terms.
ISO 18246:2023(E)
Table 1 — Alphabetical list of terms
Term Term Term Term
number number
AC connection 3.3.1 on-board charging system 3.2.2
accessible part 3.1.10 outdoor use 3.1.5
additional protection 3.4.5 PE conductor 3.4.17
basic insulation 3.4.6 plug 3.3.5
basic protection 3.4.3 primary circuit 3.2.9
charger 3.2.6 protective conductor 3.4.16
charger assembly 3.2.7 protective separation 3.4.12
charging cable assembly 3.3.3 RCD 3.4.18
control pilot circuit 3.2.12 rechargeable energy storage system 3.1.2
DC connection 3.3.2 reinforced insulation 3.4.9
degree of protection 3.1.11 removable RESS 3.1.3
double insulation 3.4.8 residual current device 3.4.18
electric chassis 3.1.9 RESS 3.1.2
electrically propelled vehicle 3.1.1 RESS circuit 3.2.11
electrically protective separation 3.4.12 RESS connector 3.3.10
equipotential bonding 3.4.14 RESS coupler 3.3.9
equipotential bonding terminal 3.4.15 RESS inlet 3.3.11
EV 3.1.1 secondary circuit 3.2.10
EV charging system 3.2.1 simple separation 3.4.11
EV supply equipment 3.2.5 single fault condition 3.1.12
exposed conductive part 3.4.13 socket-outlet 3.3.4
external electric power supply 3.2.4 supplementary insulation 3.4.7
fault protection 3.4.4 terminal 3.3.12
galvanic separation 3.4.10 vehicle connector 3.3.7
hazardous-live-part 3.4.2 vehicle coupler 3.3.6
indoor use 3.1.4 vehicle inlet 3.3.8
isolation resistance monitoring system 3.4.19 vehicle power supply circuit 3.2.8
live part 3.4.1 voltage class A 3.1.7
maximum working voltage 3.1.6 voltage class B 3.1.8
on-board charging equipment 3.2.3
4 Environmental and operational conditions
The requirements given in this document shall be met across the range of environmental and operational
conditions for which the EVs are designed to operate when connected to an external electric circuit (e.g.
external electric power supply), as specified by the vehicle manufacturer.
NOTE 1 See ISO 16750, ISO/PAS 19295, ISO 21498 and ISO 19453 for guidance.
The requirements specified in this document shall be fulfilled under all relevant energy levels (e.g. SOC
of RESS) of the electric power sources of the EV.
ISO 18246:2023(E)
The requirements given in this document shall be met across the range of environmental and
operational conditions for which the EVs and the RESS including removable RESS are designed to be
charged, as specified by the vehicle or RESS manufacturer.
NOTE 2 The safety requirements of the batteries, including removable batteries, are described in the battery
standards, such as ISO 18243:2017 and EN 50604-1:2016+A1: 2021.
5 General requirements
The on-board charging system shall be designed in order to:
— be operated safely and properly in normal use; and
— protect the rider and/or surroundings against electric shock even under single fault condition.
The first failure in the EV supply equipment and simultaneously occurring first failure in the EV, if they
are connected to each other, is not to be considered as double failure, protection against electri
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