IEC 60364-7-722:2015

IEC 60364-7-722


®


Edition 1.0 2015-02



INTERNATIONAL



STANDARD



NORME
INTERNATIONALE


Low-voltage electrical installations –
Part 7-722: Requirements for special installations or locations – Supplies for
electric vehicles

Installations électriques à basse tension –
Partie 7-722: Exigences pour les installations et emplacements spéciaux –
Alimentation des véhicules électriques

IEC 60364-7-722:2015-02(en-fr)

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IEC 60364-7-722



®



Edition 1.0 2015-02







INTERNATIONAL





STANDARD







NORME



INTERNATIONALE











Low-voltage electrical installations –

Part 7-722: Requirements for special installations or locations – Supplies for

electric vehicles




Installations électriques à basse tension –

Partie 7-722: Exigences pour les installations et emplacements spéciaux –


Alimentation des véhicules électriques














INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 43.120; 91.140.50 ISBN 978-2-8322-2305-5



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – IEC 60364-7-722:2015 © IEC 2015


CONTENTS



FOREWORD . 3

INTRODUCTION . 5

722 Supplies for electric vehicles . 6


722.1 Scope . 6

722.2 Normative references . 6

722.3 Terms and definitions . 7


722.30 Assessment of general characteristics . 8
722.31 Purposes, supplies and structure . 8
722.311 Maximum demand and diversity . 8
722.312 Conductor arrangement and system earthing . 9
722.314 Division of installation . 9
722.4 Protection for safety . 9
722.41 Protection against electric shock . 9
722.413 Protective measure: electrical separation . 9
722.5 Selection and erection of electrical equipment . 10
722.51 Common rules. 10
722.511 Compliance with standards . 10
722.512 Operational conditions and external influences . 10
722.53 Selection and erection of electrical equipment – Isolation, switching and
control . 10
722.530 Introduction . 10
722.531 Devices for protection against indirect contact by automatic
disconnection of supply . 11
722.533 Devices for protection against overcurrent . 12
722.535 Co-ordination of various protective devices . 12
722.543 Protective conductors . 12
722.55 Other equipment . 12
Annex A (informative) List of notes concerning certain countries . 14
Bibliography . 22

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IEC 60364-7-722:2015 © IEC 2015 – 3 –


INTERNATIONAL ELECTROTECHNICAL COMMISSION


____________




LOW-VOLTAGE ELECTRICAL INSTALLATIONS –



Part 7-722: Requirements for special installations or locations –

Supplies for electric vehicles



FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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.

International Standard IEC 60364-7-722 has been prepared by IEC technical committee 64:
Electrical installations and protection against electric shock.
The text of this standard is based on the following documents:
FDIS Report on voting
64/1986/FDIS 64/2004/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60364 series, under the general title Low-voltage electrical
installations, can be found on the IEC website.

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– 4 – IEC 60364-7-722:2015 © IEC 2015


The reader’s attention is drawn to the fact that Annex A lists all of the “in-some-country”

clauses on differing practices of a less permanent nature relating to the subject of this

standard.


The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be


• reconfirmed,

• withdrawn,

• replaced by a revised edition, or

• amended.

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IEC 60364-7-722:2015 © IEC 2015 – 5 –


INTRODUCTION


For the purpose of this part (IEC 60364-7-722) the requirements of the general parts 1 to 6 of

IEC 60364 apply.


The IEC 60364-7-7XX parts of IEC 60364 contain particular requirements for special

installations or locations which are based on the requirements of the general parts of

IEC 60364 (IEC 60364-1 to IEC 60364-6). These IEC 60364-7-7XX parts are considered in

conjunction with the requirements of the general parts.


The particular requirements of this part of IEC 60364 supplement, modify or replace certain of

the requirements of the general parts of IEC 60364 being valid at the time of publication of
this part. The absence of reference to the exclusion of a part or a clause of a general part
means that the corresponding clauses of the general part are applicable (undated reference).
Requirements of other 7XX parts being relevant for installations covered by this part also
apply. This part may therefore also supplement, modify or replace certain of these
requirements valid at the time of publication of this part.
The clause numbering of this part follows the pattern and corresponding references of
IEC 60364. The numbers following the particular number of this part are those of the
corresponding parts, or clauses of the other parts of the IEC 60364 series, valid at the time of
publication of this part, as indicated in the normative references of this document (dated
reference).
If requirements or explanations additional to those of the other parts of the IEC 60364 series
are needed, the numbering of such items appears as 722.101, 722.102, 722.103 etc.
NOTE In the case where new or amended general parts with modified numbering were published after this part
was issued, the clause numbers referring to a general part in this 722 part may no longer align with the latest
edition of the general part. Dated references should be observed.

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LOW-VOLTAGE ELECTRICAL INSTALLATIONS –



Part 7-722: Requirements for special installations or locations –

Supplies for electric vehicles








722 Supplies for electric vehicles


722.1 Scope
The particular requirements of this part of IEC 60364 apply to
– circuits intended to supply energy to electric vehicles,
– circuits intended for feeding back electricity from electric vehicles into the supply network.
NOTE The requirements for feeding back electricity from electric vehicles into the supply network are under
consideration.
Inductive charging is not covered.
722.2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60269 (all parts), Low voltage fuses
IEC 60309-1:1999, Plugs, socket-outlets and couplers for industrial purposes – Part 1:
General requirements
IEC 60309-2, Plugs, socket-outlets and couplers for industrial purposes – Part 2: Dimensional
interchangeability requirements for pin and contact-tube accessories
IEC 60364 (all parts), Low-voltage electrical installations

IEC 60898 (all parts), Electrical accessories – Circuit-breakers for overcurrent protection for
household and similar installations
IEC 60947-2, Low-voltage switchgear and controlgear – Part 2: Circuit-breakers
IEC 60947-6-2, Low-voltage switchgear and controlgear – Part 6-2: Multiple function
equipment – Control and protective switching devices (or equipment) (CPS)
IEC 61008-1, Residual current circuit-breakers without integral overvoltage protection for
household and similar uses (RCCBs) – Part 1: General rules
IEC 61009-1, Residual current operated circuit-breakers with integral overvoltage protection
for household and similar uses (RCBOs) – Part 1: General rules
IEC 61140:2001, Protection against electric shock – Common aspects for installation and
equipment

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IEC 60364-7-722:2015 © IEC 2015 – 7 –


IEC 61557-8, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and

1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Part

8: Insulation monitoring devices for IT systems


IEC 61557-9, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and

1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Part

9: Equipment insulation fault location in IT systems


IEC 61558-2-4, Safety of transformers, reactors, power supply units and similar products for

supply voltages up to 1 100 V – Part 2-4: Particular requirements and tests for isolating

transformers and power supply units incorporating isolating transformers

IEC 61851 (all parts), Electric vehicle conductive charging system
IEC 62196 (all parts), Plugs, socket-outlets, vehicle connectors and vehicle inlets –
Conductive charging of electric vehicles
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 62262, Degrees of protection provided by enclosures for electrical equipment against
external mechanical impacts (IK code)
IEC 62423, Type F and type B residual current operated circuit-breakers with and without
integral overcurrent protection for household and similar uses
722.3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
722.3.1
electric vehicle
EV
any vehicle propelled by an electric motor drawing current from a rechargeable storage
battery or from other portable energy storage devices (rechargeable, using energy from a
source off the vehicle such as a residential or public electricity service), which is

manufactured primarily for use on public streets, roads or highways
Note 1 to entry: In ISO publications, the term “electric road vehicle” is used for “electric vehicle.”
[SOURCE: IEC 61851-1:2010, 3.8]
722.3.2
connecting point
point where one electric vehicle is connected to the fixed installation
Note 1 to entry: The connecting point is a socket-outlet or a vehicle connector.
Note 2 to entry: The connecting point may be part of the fixed installed electric vehicle supply equipment in
accordance with the IEC 61851 series.

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722.3.3

mode 1 charging

connection of the EV to the a.c. supply network (mains) utilizing standardized socket-outlets

not exceeding 16 A and not exceeding 250 V a.c. single-phase or 480 V a.c. three-phase, at

the supply side, and utilizing the live and protective earth conductors


[SOURCE: IEC 61851-1:2010, 6.2 "EV charging modes, mode 1 charging"]


722.3.4

mode 2 charging

connection of the EV to the a.c. supply network (mains) utilizing standardized single-phase or

three-phase socket-outlets not exceeding 32 A and not exceeding 250 V a.c. single-phase or
480 V a.c. three-phase, and utilizing the live and protective earth conductors together with a
control pilot function and system of personnel protection against electric shock (RCD)
between the EV and the plug or as a part of the in-cable control box
[SOURCE: IEC 61851-1:2010, 6.2 "EV charging modes, mode 2 charging", modified]
722.3.5
mode 3 charging
connection of the EV to the a.c. supply network (mains) utilizing dedicated electric vehicle
supply equipment where the control pilot function extends to control equipment in the electric
vehicle supply equipment permanently connected to the a.c. supply network (mains)
[SOURCE: IEC 61851-1:2010, 6.2 "EV charging modes, mode 3 charging"]
722.3.6
mode 4 charging
connection of the EV to the a.c. supply network (mains) utilizing an off-board charger where
the control pilot function extends to equipment permanently connected to the a.c. supply
[SOURCE: IEC 61851-1:2010, 6.2 "EV charging modes, mode 4 charging"]
722.3.7
demand factor
ratio, expressed as a numerical value or as a percentage, of the maximum demand of a circuit
or a group of circuits within a specified period, to the corresponding total installed load of the
circuit(s)
Note 1 to entry: In using this term, it is necessary to specify to which level of the system it relates.
[SOURCE: IEC 60050-691:1973, 691-10-05, modified – the word "circuit" has replaced the

word "installation"].
722.30 Assessment of general characteristics
722.31 Purposes, supplies and structure
722.311 Maximum demand and diversity
Add the following:
It shall be considered that in normal use each single connecting point is used at its rated
current.
NOTE For this application the demand factor of the final circuit supplying the connecting point (e.g. the socket-
outlet) is equal to 1.

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IEC 60364-7-722:2015 © IEC 2015 – 9 –


Since all the connecting points of the installation can be used simultaneously, the diversity

factor of the distribution circuit shall be taken as equal to 1. However, this factor may be

reduced where load control is available.


722.312 Conductor arrangement and system earthing


722.312.2.1 TN systems

Add the following:


In a TN system, the final circuit supplying a connecting point shall be a TN-S system.

722.314 Division of installation
Add the following:
722.314.101 A dedicated circuit shall be provided for the connection to electric vehicles.
722.4 Protection for safety
722.41 Protection against electric shock
722.413 Protective measure: electrical separation
722.413.3 Requirements for fault protection
Add the following:
722.413.3.101  The circuit shall be supplied through a fixed isolating transformer complying
with IEC 61558-2-4.
NOTE In mode 4 (d.c. charging), requirements for the isolating transformer are under consideration.
722.41.B Obstacles and placing out of reach
722.41.B.2 Obstacles
Replace the existing text by the following:
Protection by obstacles shall not be used.
722.41.B.3 Placing out of reach
Replace the existing text by the following:

Protection by placing out of reach shall not be used.
722.41.C.1 Non-conducting location
Replace the existing text by the following:
Protection by non-conducting location shall not be used.
722.41.C.2 Protection by earth-free local equipotential bonding
Replace the existing text by the following:
Protection by earth-free local equipotential bonding shall not be used.

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722.41.C.3 Electrical separation for the supply of more than one item of current-

using equipment


Replace the existing text by the following:


Electrical separation shall not be used for the supply of more than one electric vehicle.


722.5 Selection and erection of electrical equipment


722.51 Common rules

722.511 Compliance with standards

Add the following:
722.511.101 EV charging stations shall comply with the appropriate parts of the
IEC 61851 series.
722.512 Operational conditions and external influences
722.512.2 External influences
Add the following new subclauses:
722.512.2.101 Presence of water (AD)
Where the connection point is installed outdoors, the equipment shall be selected with a
degree of protection of at least IPX4 in order to protect against water splashes (AD4).
722.512.2.102 Presence of solid foreign bodies (AE)
Where the connecting point is installed outdoors, the equipment shall be selected or provided
with a degree of protection of at least IP4X in order to protect against the ingress of small
objects (AE3).
722.512.2.103 Impact (AG)
Equipment installed in public areas and car park sites shall be protected against mechanical
damage (impact of medium severity AG2). Protection of the equipment shall be afforded by
one or more of the following:
– the position or location shall be selected to avoid damage by any reasonably foreseeable
impact;

– local or general mechanical protection shall be provided;
– equipment shall be installed that complies with a minimum degree of protection against
external mechanical impact of IK07 in accordance with the requirements of IEC 62262.
722.53 Selection and erection of electrical equipment – Isolation, switching and
control
722.530 Introduction

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IEC 60364-7-722:2015 © IEC 2015 – 11 –


722.530.3 General and common requirements


Add the following:


722.530.3.101 The requirements of this clause shall be achieved either by the selection

and erection of the appropriate equipment in the fixed installation or by the selection of an EV

charging station which incorporates the appropriate equipment or a combination of both.

722.530.3.102 Insulation monitoring devices (IMD)


For circuits in IT systems that are intended to supply energy for electric vehicles, for example

by an isolating transformer or a battery system, an insulation monitoring device (IMD)

according to IEC 61557-8 shall be provided.
An IMD may not be necessary for a circuit that uses automatic disconnection of supply at the
first fault.
It is recommended to install an IMD with the following two response values:
– Pre-warning
If the insulation resistance falls below 300 Ω/V an optical and/or acoustical signal should
be issued to the user. An ongoing charging session may continue but a new charging
session shall not take place.
– Alarm
If the resistance falls below 100 Ω/V an optical and/or acoustical signal should be issued
to the user. The charging circuit may shut down within 10 s.
722.530.3.103 Insulation fault location system (IFLS)
For circuits described in 722.530.3.102, and if more than one electric vehicle is supplied from
the same unearthed supply, it is recommended to use an insulation fault location system
(IFLS) according to IEC 61557-9 to dete
...