SIST EN ISO 17409:2020

SLOVENSKI STANDARD
01-junij-2020
Nadomešča:
SIST EN ISO 17409:2017
Cestna vozila na električni pogon - Prevodni prenos moči - Varnostne zahteve (ISO
17409:2020)
Electrically propelled road vehicles - Conductive power transfer - Safety requirements
(ISO 17409:2020)
Elektrisch angetriebene Straßenfahrzeuge - Kabelgebundene Energieübertragung -
Sicherheitsanforderungen (ISO 17409:2020)
Véhicules routiers à propulsion électrique - Transfert d'énergie conductive - Exigences
de sécurité (ISO 17409:2020)
Ta slovenski standard je istoveten z: EN ISO 17409:2020
ICS:
43.120 Električna cestna vozila Electric road vehicles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 17409
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2020
EUROPÄISCHE NORM
ICS 43.120 Supersedes EN ISO 17409:2017
English Version
Electrically propelled road vehicles - Conductive power
transfer - Safety requirements (ISO 17409:2020)
Véhicules routiers à propulsion électrique - Transfert Elektrisch angetriebene Straßenfahrzeuge -
de puissance par conduction - Exigences de sécurité Kabelgebundene Energieübertragung -
(ISO 17409:2020) Sicherheitsanforderungen (ISO 17409:2020)
This European Standard was approved by CEN on 18 February 2020.

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, Turkey 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17409:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 17409:2020) 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 AFNOR.
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 September 2020, and conflicting national standards
shall be withdrawn at the latest by September 2020.
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 17409:2017.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 17409:2020 has been approved by CEN as EN ISO 17409:2020 without any modification.

INTERNATIONAL ISO
STANDARD 17409
Second edition
2020-02
Electrically propelled road vehicles —
Conductive power transfer — Safety
requirements
Véhicules routiers à propulsion électrique — Transfert d'énergie
conductive — Exigences de sécurité
Reference number
ISO 17409:2020(E)
©
ISO 2020
ISO 17409:2020(E)
© ISO 2020
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
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 17409:2020(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Environmental and operational conditions .10
5 Specific requirements for the vehicle inlet, plug, and cable .11
5.1 Requirements for the plug and cable (case A) .11
5.2 Requirements for the vehicle inlet .11
6 Requirements for protection of persons against electric shock .11
6.1 General .11
6.2 Basic protection when connected to an external electric circuit .11
6.3 Protective conductor .12
6.4 Isolation resistance .13
6.4.1 AC connection .13
6.4.2 DC connection .13
6.5 Requirements for unmated vehicle contacts.13
6.5.1 General.13
6.5.2 Normal operation .14
6.5.3 Operation under single fault conditions .14
6.6 Insulation coordination .15
6.6.1 AC connection .15
6.6.2 DC connection .15
6.7 Touch current .16
6.8 Compatibility with residual current devices (RCD) .16
7 Protection against thermal incident .16
7.1 Requirements for normal operation .16
7.2 Overcurrent protection .16
7.2.1 General.16
7.2.2 Overload protection .17
7.2.3 Short-circuit protection for AC connection .17
7.2.4 Short-circuit protection for DC connection.17
7.3 Arc protection for DC connections .18
7.4 Residual energy after disconnection .19
7.5 Transient overvoltage .19
8 Additional requirements for AC power transfer .19
8.1 Voltage and frequency ranges for normal operation .19
8.2 Current characteristics.19
8.2.1 Load current .19
8.2.2 Inrush current .20
8.3 Active factor .20
8.4 Interlock function for the vehicle coupler .21
8.5 Phase order in three-phase operation .21
9 Additional requirements for DC power transfer .21
9.1 General .21
9.2 Disconnection device .21
9.3 Control pilot functions.22
9.4 Vehicle isolation resistance monitoring system .22
9.5 Locking of the vehicle connector .22
9.6 AC or DC electric power at the same contacts .22
9.7 Contact temperature .23
9.8 Overvoltage in case of a load dump .24
ISO 17409:2020(E)
9.9 Compatibility with insulation monitoring .24
10 Reverse power transfer .24
10.1 General .24
10.2 AC reverse power transfer .25
10.2.1 General.25
10.2.2 Output power quality . .25
10.2.3 Prevention of disconnection of vehicle coupler under load .26
10.2.4 Protection against electrical shock .26
10.2.5 Protection against thermal incident .26
10.3 DC reverse power transfer .26
10.3.1 General.26
10.3.2 Connection to the external electric circuit .27
10.3.3 Protection against overdischarge of the RESS .27
10.3.4 Auxiliary power supply from EV (optional) .27
10.3.5 Protection against thermal incident .27
11 Operational requirements .27
12 Owner’s manual and marking .27
12.1 Owner's manual .27
12.2 Marking .27
13 Test procedure .27
13.1 General .27
13.2 Resistance of protective conductor .28
13.3 Isolation resistance test .28
13.4 Withstand voltage test .28
13.4.1 General.28
13.4.2 Test voltage .29
13.5 Inrush current tests .29
13.5.1 General.29
13.5.2 Measurement .30
13.6 Touch current .30
13.6.1 General.30
13.6.2 AC Charging .31
13.6.3 DC charging .33
13.7 DC power transfer with maximum current .34
13.8 DC power contact over temperature .34
Annex A (informative) Y capacitance measurement .37
Bibliography .40
iv © ISO 2020 – All rights reserved

ISO 17409:2020(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 jointly by Technical Committee ISO/TC 22, Road vehicles, Subcommittee
SC 37, Electrically propelled road vehicles, and Technical Committee IEC/ TC 69, Electric road vehicles and
electric industrial trucks.
This second edition replaces the first edition (ISO 17409:2015), which has been technically revised. The
main changes compared to the previous edition are as follows:
— terms and definitions have been updated,
— requirements for mode 1 have been removed because it is no longer relevant for new designs,
— requirements for reverse power transfer have been added,
— requirements for a DC connection with a thermal management system have been added,
— short circuit during DC charging has been reworked, and
— requirements for charging with pantograph have been added.
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.
INTERNATIONAL STANDARD ISO 17409:2020(E)
Electrically propelled road vehicles — Conductive power
transfer — Safety requirements
1 Scope
This document specifies electric safety requirements for conductive connection of electrically propelled
road vehicles to external electric circuits. External electric circuits include external electric power
supplies and external electric loads. This document provides requirements for the charging modes
2, 3, 4, as defined in IEC 61851-1, and reverse power transfer. For mode 4, this document provides
requirements regarding the connection to an isolated DC EV charging station according to IEC 61851-23.
NOTE 1 This edition does not provide requirements for mode 1.
NOTE 2 External electric circuits are not part of the vehicle.
This document applies to the on-board sections of vehicle power supply circuits. It applies also to
dedicated power supply control functions used for the connection of the vehicle to an external electric
circuit.
It does not provide comprehensive safety information for manufacturing, maintenance and repair
personnel.
NOTE 3 ISO 6469-3 provides general electrical safety requirements for electrically propelled road vehicles.
NOTE 4 With this edition of this document the limitation of y-capacitance for protection against electric shock
under single failure conditions is no longer applicable as a fault protection provision when the vehicle has a
conductive DC connection to an external electric circuit.
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, Electrically propelled road vehicles — Safety specifications — Part 3: Electrical safety
ISO 15118 (all parts), Road vehicles — Vehicle to grid communication interface
ISO 20653, Road vehicles — Degrees of protection (IP code) — Protection of electrical equipment against
foreign objects, water and access
ISO 26262 (all parts), Road vehicles — Functional safety
IEC 60038, IEC standard voltages
IEC 60364-4-41:2005, Low-voltage electrical installations — Part 4-41: Protection for safety — Protection
against electric shock
IEC 60364-4-43:2008, Electrical installations of buildings — Part 4-43: Protection for safety — Protection
against overcurrent
IEC 60364-5-54, Low-voltage electrical installations — Part 5-54: Selection and erection of electrical
equipment — Earthing arrangements and protective conductors
IEC 60364-6, Low-voltage electrical installations — Part 6: Verification
ISO 17409:2020(E)
IEC 60664-1, Insulation coordination for equipment within low-voltage systems - Part 1: Principles,
requirements and tests
IEC 61000-3-3, Electromagnetic compatibility (EMC) — Part 3-3: Limits — Limitation of voltage changes,
voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current
≤16 A per phase and not subject to conditional connection
IEC 61000-3-11, Electromagnetic compatibility (EMC) — Part 3-11: Limits — Limitation of voltage changes,
voltage fluctuations and flicker in public low-voltage supply systems — Equipment with rated current ≤
75 A and subject to conditional connection
IEC 61032, Protection of persons and equipment by enclosures — Probes for verification
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 62196-1, Plugs, socket-outlets, vehicle connectors and vehicle inlets — Conductive charging of electric
vehicles — Part 1: General requirements
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 62196-3:2015, Plugs, socket-outlets, vehicle connectors and vehicle inlets — conductive charging of
electric vehicles — Part 3: Dimensional compatibility and interchangeability requirements for dedicated
d.c. and combined a.c./d.c. pin and contact-tube vehicle couplers
IEC/TS 62196-3-1:—, Plugs, socket-outlets, vehicle connectors and vehicle inlets — conductive charging of
electric vehicles — Part 3-1: Vehicle connector, vehicle inlet and cable assembly intended to be used with a
thermal management system for DC charging
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
active factor
cos φ
for a two-terminal element or a two-terminal circuit under sinusoidal conditions, ratio of the active
power to the apparent power
[SOURCE: IEC 60050-131:2001, 131-11-49, modified — The symbol “cos φ” was added and the note
deleted.]
3.2
automated connection device
ACD
active device where the physical connection between EV supply equipment (3.25) and vehicle is made
and broken without user interaction providing an electromechanical interface
1)
[SOURCE: IEC 61851-23-1:— , 3.1.203, modified — The phrase “and broken” was added.]
1)  Under preparation. Stage at the time of publication: IEC/ACDV 61851-23-1:2020.
2 © ISO 2020 – All rights reserved

ISO 17409:2020(E)
3.3
ACD counterpart
passive device which is used in combination with an ACD (3.2) to make and break the physical
connection between EV supply equipment (3.25) and vehicle providing an electromechanical interface
without user interaction
1)
[SOURCE: IEC 61851-23-1:— , 3.1.204, modified — The phrase “and break” was added.]
3.4
automatic coupler
system comprising an ACD (3.2) and ACD counterpart (3.3)
1)
[SOURCE: IEC 61851-23-1:— , 3.1.205, modified — The word “of” was deleted.]
3.5
basic insulation
insulation of hazardous live parts (3.30) which provides basic protection
Note 1 to entry: This concept does not apply to insulation used exclusively for functional purposes.
[SOURCE: ISO 6469-3:2018, 3.3, modified — Note 2 to entry removed.]
3.6
case A
connection of an EV (3.19) to the supply network (3.53) with a plug (3.43) and cable permanently
attached to the EV
Note 1 to entry: The cable assembly is part of the vehicle.
[SOURCE: IEC 61851-1:2017, 3.1.10]
3.7
case B
connection of an EV (3.19) to the supply network (3.53) with a cable assembly detachable at both ends
Note 1 to entry: The cable assembly is not part of the vehicle or the EV charging station (3.23).
[SOURCE: IEC 61851-1:2017, 3.1.11]
3.8
case C
connection of an EV (3.19) to the supply network (3.53) utilizing a cable and vehicle connector (3.58)
permanently attached to the EV charging station (3.23).
Note 1 to entry: The cable assembly is part of the EV charging station.
[SOURCE: IEC 61851-1:2017, 3.1.12]
3.9
case D
connection of an EV (3.19) to a supply network (3.53) utilizing an automatic coupler (3.4) which has an
ACD (3.2) on the EV supply equipment (3.25)
1)
[SOURCE: IEC 61851-23-1:— , 3.1.201]
3.10
case E
connection of an EV (3.19) to a supply network (3.53) utilizing an automatic coupler (3.4) which has an
ACD (3.2) on the EV
1)
[SOURCE: IEC 61851-23-1:— , 3.1.202]
ISO 17409:2020(E)
3.11
charger
power converter at the on-board section of the vehicle power supply circuit (3.61) which supplies
electric power
EXAMPLE For charging a RESS (3.47).
3.12
conductive part
part which can carry electric current
[SOURCE: ISO 6469-3:2018, 3.6]
3.13
control pilot function
function used to monitor and control the interaction between the EV (3.19) and the EV supply
equipment (3.25)
[SOURCE: IEC 61851-1:2017, 3.3.3]
3.14
cut-off current
let-through current
maximum instantaneous value of current attained during the breaking operation of a switching device
or a fuse
Note 1 to entry: This concept is of particular importance when the switching device or the fuse operates in such a
manner that the prospective peak current of the circuit is not reached.
[SOURCE: IEC 60050-441:1984, 441-17-12, modified — “the” deleted from definition, “is” added to the
Note to entry.]
3.15
DC EV charging station
EV charging station (3.23) that supplies direct current to an EV (3.19)
[SOURCE: IEC 61851-1:2017, 3.1.6]
3.16
degree of protection
protection provided by an enclosure against access, foreign objects and/or water and verified by
standardized test methods
[SOURCE: ISO 20653:2013, 3.2]
3.17
direct contact
electric contact of persons or animals with live parts (3.35)
[SOURCE: ISO 6469-3:2018, 3.10]
3.18
double insulation
insulation comprising both basic insulation (3.5) and supplementary insulation (3.52)
[SOURCE: ISO 6469-3:2018, 3.11]
3.19
electrically propelled vehicle
EV
vehicle with one or more electric drive(s) (3.21) for vehicle propulsion
[SOURCE: ISO 6469-3:2018, 3.15, modified — "EV" added as an equivalent term.]
4 © ISO 2020 – All rights reserved

ISO 17409:2020(E)
3.20
electric chassis
conductive parts (3.12) of a vehicle that are electrically connected and whose potential is taken as
reference
[SOURCE: ISO 6469-3:2018, 3.12]
3.21
electric drive
combination of traction motor, power electronics and their associated controls for the conversion of
electric to mechanical power and vice versa
[SOURCE: ISO 6469-3:2018, 3.13]
3.22
electric shock
physiological effect resulting from an electric current through a human body or animal body
[SOURCE: ISO 6469-3:2018, 3.14]
3.23
EV charging station
stationary part of EV supply equipment (3.25) connected to the supply network (3.53)
[SOURCE: IEC 61851-1:2017, 3.1.5]
3.24
EV plug
specific plug (3.43) intended to be used as part of EV supply equipment (3.25) or for the connection of EV
(3.19) to EV supply equipment, and defined in the IEC 62196 series
[SOURCE: IEC 61851-1:2017, 3.5.8]
3.25
EV supply equipment
equipment or a combination of equipment, providing dedicated functions to supply electric energy from
a fixed electrical installation or supply network (3.53) to an EV (3.19) for the purpose of charging
EXAMPLE 1 For mode 3 (3.39) case B (3.7), the EV supply equipment consists of the EV charging station (3.23)
and the cable assembly.
EXAMPLE 2 For mode 3 case C (3.8), the EV supply equipment consists of the EV charging station with its
cable assembly.
[SOURCE: IEC 61851-1:2017, 3.1.1]
3.26
exposed conductive part
conductive part (3.12) of equipment which can be touched and which is not normally live, but which can
become live when basic insulation (3.5) fails
[SOURCE: ISO 6469-3:2018, 3.18, modified — Note 1 to entry deleted.]
3.27
external electric circuit
electric circuit which connects to the vehicle power supply circuit (3.61) using the plug (3.43) [case A
(3.6)], the vehicle inlet (3.60) [case B (3.7) and case C (3.8)], the ACD counterpart (3.3) [case D (3.9)] or
the ACD (3.2) [case E (3.10)]
EXAMPLE EV charging station (3.23), external electric load.
ISO 17409:2020(E)
3.28
external electric power supply
electric power source that is not part of the vehicle for supplying electric energy to an EV (3.19) using
an EV supply equipment (3.25)
3.29
hazard
potential source of harm
[SOURCE: IEC 60050-903:2013, 903-01-02, modified — Notes to entry 1, 2, and 3 deleted.]
3.30
hazardous live part
live part (3.35) which, under certain conditions, can give a harmful electric shock (3.22)
[SOURCE: ISO 6469-3:2018, 3.22, modified — Note 1 to entry removed.]
3.31
interlock function
function that prevents the power contacts of a socket-outlet (3.51)/vehicle connector (3.58) from
becoming live before it is in proper engagement with a plug (3.43)/vehicle inlet (3.60), and which either
prevents the plug/vehicle connector from being withdrawn while its power contacts are live or makes
the power contacts dead before separation
[SOURCE: IEC 61851-1:2017, 3.5.16, modified — term changed from “interlock” to “interlock function”,
definition changed from “device or combination of devices” to “function”.]
3.32
isolation resistance
insulation resistance
resistance between live parts (3.35) of an electric circuit and the electric chassis (3.20) as well as other
electric circuits which are insulated from this electric circuit
[SOURCE: ISO 6469-3:2018, 3.23]
3.33
isolation resistance monitoring system
system that periodically or continuously monitors the isolation resistance (3.32) between live parts
(3.35) and the electric chassis (3.20)
[SOURCE: ISO 6469-3:2018, 3.24]
3.34
live conductor
conductor which is energized in normal operation and capable of contributing to the transmission or
distribution of electric energy
Note 1 to entry: Live conductors include line conductors (including DC+ conductors and DC− conductors) and
neutral conductors.
3.35
live part
conductor or conductive part (3.12) intended to be energized in normal use, but by convention not the
electric chassis (3.20)
[SOURCE: ISO 6469-3:2018, 3.25]
6 © ISO 2020 – All rights reserved

ISO 17409:2020(E)
3.36
maximum working voltage
highest value of AC voltage (rms) or of DC voltage that can occur under normal operating conditions
according to the manufacturer's specifications, disregarding transients and ripple
[SOURCE: ISO 6469-3:2018, 3.26, modified — The word “any” was deleted from “normal operating
conditions”.]
3.37
mode 1
method for the connection of an EV (3.19) to a standard socket-outlet (3.51) of an AC supply network,
utilizing a cable and plug (3.43), both of which are not fitted with any supplementary pilot or auxiliary
contacts
[SOURCE: IEC 61851-1:2017, 6.2.1]
3.38
mode 2
method for the connection of an EV (3.19) to a standard socket-outlet (3.51) of an AC supply network
utilizing an AC EV supply equipment with a cable and plug (3.43), with a control pilot function (3.13) and
system for personal protection against electric shock (3.22) placed between the standard plug and the EV
[SOURCE: IEC 61851-1:2017, 6.2.2]
3.39
mode 3
method for the connection of an EV (3.19) to an AC EV supply equipment permanently connected to an
AC supply network, with a control pilot function (3.13) that extends from the AC EV supply equipment
to the EV
Note 1 to entry: Mode 3 includes the use of cable assembly not permanently connected to the AC supply network
[case A (3.6) and case B (3.7)].
[SOURCE: IEC 61851-1:2017, 6.2.3, modified — Note 1 to entry added.]
3.40
mode 4
method for the connection of an EV (3.19) to an AC or DC supply network (3.53) utilizing a DC EV supply
equipment, with a control pilot function (3.13) that extends from the DC EV supply equipment to the EV
[SOURCE: IEC 61851-1:2017, 6.2.4]
3.41
overcurrent protection
protection intended to operate when the current is in excess of a predetermined value
Note 1 to entry: a charge control function is not considered an overcurrent protection
[SOURCE: ISO 6469-3:2018, 3.28]
3.42
overload protection
protection intended to operate in the event of overload on the protected section
[SOURCE: ISO 6469-3:2018, 3.27]
3.43
plug
accessory having contacts designed to engage with the contacts of a socket-outlet (3.51), also
incorporating means for the electrical connection and mechanical retention of flexible cables or cords
[SOURCE: IEC 61851-1:2017, 3.5.9]
ISO 17409:2020(E)
3.44
protective conductor
conductor provided for purposes of safety, for example protection against electric shock (3.22)
EXAMPLE Examples of a protective conductor include a protective bonding conductor, protective earthing
conductor and an earthing conductor when used for protection against electric shock.
[SOURCE: IEC 61851-1:2017, 3.7.2]
3.45
(electrically) protective separation
separation of one electric circuit from another by means of:
— double insulation (3.18); or
— basic insulation (3.5) and electrically protective screening (shielding); or
— reinforced insulation (3.48)
[SOURCE: IEC 61140:2016, 3.24]
3.46
rated current
current assigned by the manufacturer for a specified operating condition
[SOURCE: IEC 60050:1998, 442-01-02, modified — The phrase “of an accessory” was removed from end
of definition.]
3.47
rechargeable energy storage system
RESS
rechargeable system that stores energy for delivery of electric energy for the electric drive (3.21)
EXAMPLE Battery, capacitor, flywheel.
[SOURCE: ISO 6469-1:2019, 3.22]
3.48
reinforced insulation
insulation of hazardous live parts (3.30) which provides a degree of protection (3.16) against electric
shock (3.22) equivalent to double insulation (3.18)
Note 1 to entry: Reinforced insulation may comprise several layers that cannot be tested singly as basic insulation
(3.5) or supplementary insulation (3.52).
[SOURCE: ISO 6469-3: 2018, 3.32, modified — The word "protection" was removed and replaced by
"degree of protection".]
3.49
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: IEC 60050-442:1998, 442-05-02, modified — The phrase "or association of devices" was
removed, note 1 to entry was added.]
8 © ISO 2020 – All rights reserved

ISO 17409:2020(E)
3.50
reverse power transfer
supply of electric power from an EV (3.19) using the EV plug (3.24) [case A (3.6)], the vehicle inlet (3.60)
[case B (3.7) and case C (3.8)], the ACD counterpart (3.3) [case D (3.9)] or the ACD (3.2) [case E (3.10)] to
an external electric circuit (3.27)
Note 1 to entry: Unintended current flow from an EV to an external electric circuit is not considered a reverse
power transfer.
Note 2 to entry: Supply of power by using an on-board equipment that is equipped with a socket-outlet (3.51) is
not reverse power transfer.
3.51
socket-outlet
accessory having socket-contacts designed to engage with the contacts of a plug (3.43) and having
terminals for the connection of cables or cords
[SOURCE: IEC 61851-1:2017, 3.5.10]
3.52
supplementary insulation
independent insulation applied in addition to basic insulation (3.5), for fault protection
[SOURCE: ISO 6469-3:2018, 3.33]
3.53
supply network
any source of electric energy
EXAMPLE Mains or electric grid, distributed ener
...