IEC 60364-5-53:2001/AMD2:2015

IEC 60364-5-53 ®
Edition 3.0 2015-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 2
AM ENDEMENT 2
Electrical installations of buildings –
Part 5-53: Selection and erection of electrical equipment – Isolation, switching
and control
Installations électriques des bâtiments –
Partie 5-53: Choix et mise en oeuvre des matériels électriques – Sectionnement,
coupure et commande
IEC 60364-5-53:2001-08/AMD2:2015-09(en-fr)

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IEC 60364-5-53 ®
Edition 3.0 2015-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 2
AM ENDEMENT 2
Electrical installations of buildings –

Part 5-53: Selection and erection of electrical equipment – Isolation, switching

and control
Installations électriques des bâtiments –

Partie 5-53: Choix et mise en oeuvre des matériels électriques – Sectionnement,

coupure et commande
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130; 91.140.50 ISBN 978-2-8322-2883-8

– 2 – IEC 60364-5-53:2001/AMD2:2015

© IEC 2015
FOREWORD
This amendment has been prepared by IEC technical committee 64: Electrical installations

and protection against electric shock.

The text of this amendment is based on the following documents:

FDIS Report on voting
64/2031/FDIS 64/2072/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website 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• withdrawn,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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its contents.
Users should therefore print this document using a colour printer.

_______
FOREWORD
Replace the existing text, including the text provided in Amendment 1:2002 that reads:
"This publication has been drafted, as close as possible, in accordance with the ISO/IEC

Directives, Part 3"
by the following new sentence:
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
Delete, from both IEC 60364-5-53:2001 and from Amendment 1:2002, the sentence that reads
"Annexes A, B, C and D are for information only."

530.2 Normative references
Add the following new references:
IEC 60038, IEC standard voltages
IEC 60364-5-54, Low-voltage electrical installations – Part 5-54: Selection and erection of
electrical equipment – Earthing arrangements and protective conductors

© IEC 2015
IEC 61643-11:2011, Low-voltage surge protective devices – Part 11: Surge protective devices

connected to low-voltage power systems – Requirements and test methods

IEC 62305 (all parts), Protection against lightning

IEC 62305-1, Protection against lightning – Part 1: General principles

IEC 62305-2, Protection against lightning – Part 2: Risk management

IEC 62305-4, Protection against lightning – Part 4: Electrical and electronic systems within

structures
Replace the current reference to "IEC 61643-12" by the following:
IEC 61643-12:2008, Low-voltage surge protective devices – Part 12: Surge protective devices
connected to low-voltage power distribution systems – Selection and application principles
Replace the existing date "2001" for IEC 60364-4-41 by "2005"
Replace the existing date "2001" for IEC 60364-4-43 by "2008"
Replace the existing date "2001" for IEC 60364-4-44 by "2007"
Replace the existing date "1996" for IEC 61008-1 by "2010"

534 Devices for protection against electromagnetic and voltage disturbances
Replace the existing title and text of Clause 534, including the text provided in Amendment
1:2002, by the following new title and text:
534 Devices for protection against transient overvoltages
534.1 General
This clause contains provisions for the application of voltage limitation in order to obtain
insulation coordination in the cases described in IEC 60364-4-44, IEC 60664-1, IEC 62305-1,
IEC 62305-4 and IEC 61643-12.
This clause focuses mainly on the requirements for the selection and erection of SPDs for
protection against transient overvoltages where required by Clause 443 of IEC 60364-4-
44:2007, the IEC 62305 series, or as otherwise specified.
This clause does not take into account:

– surge protective components which may be incorporated in the appliances connected to
the installation;
– portable SPDs.
NOTE Further information can be found in IEC 61643-12.
This clause applies to a.c. power circuits. As far as it is applicable, the requirements of this
clause may be followed for d.c. power circuits.
534.2 Void
534.3 Terms and definitions
534.3.1
SPD assembly
one SPD or a set of SPDs, in both cases including all SPD disconnectors required by the SPD
manufacturer, providing the required overvoltage protection for a type of system earthing

– 4 – IEC 60364-5-53:2001/AMD2:2015

© IEC 2015
534.3.2
SPD disconnector
disconnector
device for disconnecting an SPD, or part of an SPD, from the power system

Note 1 to entry: This disconnecting device is not required to have isolating capability for safety purposes. It is to

prevent a persistent fault on the system and is used to give an indication of an SPD’s failure. Disconnectors can be

internal (built in) or external (required by the manufacturer). There may be more than one disconnector function, for
example an over-current protection function and a thermal protection function. These functions may be in separate
units.
[SOURCE: IEC 61643-11:2011, 3.1.28]

534.3.3
mode of protection of an SPD
intended current path, between terminals that contains protective components, e.g. line-to-
line, line-to-earth, line-to-neutral, neutral-to-earth
[SOURCE: IEC 61643-11:2011, 3.1.8]
534.3.4
follow current interrupt rating
I
fi
prospective short-circuit current that an SPD is able to interrupt without operation of a
disconnector
[SOURCE: IEC 61643-11:2011, 3.1.39]
534.3.5
short-circuit current rating
I
SCCR
maximum prospective short-circuit current from the power system for which the SPD, in
conjunction with the disconnector specified, is rated
[SOURCE: IEC 61643-11:2011, 3.1.27]
534.3.6
voltage protection level
U
P
maximum voltage to be expected at the SPD terminals due to an impulse stress with defined
voltage steepness and an impulse stress with a discharge current with given amplitude and
waveshape
Note 1 to entry: The voltage protection level is given by the manufacturer and may not be exceeded by:
– the measured limiting voltage determined for front-of-wave sparkover (if applicable) and the measured limiting
voltage determined from the residual voltage measurements at amplitudes corresponding to I and/or I
n imp
respectively for test classes II and/or I;
– the measured limiting voltage at the open circuit voltage of the combination wave generator (U ), determined
OC
for the combination wave for test class III.
[SOURCE: IEC 61643-11:2011, 3.1.14]
534.3.7
rated impulse voltage
U
W
impulse withstand voltage value assigned by the manufacturer to the equipment or to a part of
it, characterizing the specified withstand capability of its insulation against transient
overvoltages
[SOURCE: IEC 60664-1:2007, 3.9.2 MOD]

© IEC 2015
534.3.8
maximum continuous operating voltage

U
C
maximum r.m.s. voltage, which may be continuously applied to the SPD's mode of protection

Note 1 to entry: The U value covered by this standard may exceed 1 000 V.
C
[SOURCE: IEC 61643-11:2011, 3.1.11]

534.3.9
nominal discharge current for class II test

I
n
crest value of the current through the SPD having a current waveshape of 8/20
[SOURCE: IEC 61643-11:2011, 3.1.9]
534.3.10
impulse discharge current for class I test
I
imp
crest value of a discharge current through the SPD with specified charge transfer Q and
specified energy W/R in the specified time
[SOURCE: IEC 61643-11:2011, 3.1.10]
534.3.11
two-port SPD
SPD having specific series impedance connected between separate input and output
connections
[SOURCE: IEC 61643-11:2011, 3.1.3]
534.4 Selection and erection of SPDs
534.4.1 SPD location and SPD test class
SPDs shall at least be instal
...