IEC 60364-5-55-am2

SLOVENSKI STANDARD
01-julij-2009
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Amendment 2 - Electrical installations of buildings - Part 5-55: Selection and erection of
electrical equipment - Other equipment
Amendement 2 - Installations électriques des bâtiments - Partie 5-55: Choix et mise en
oeuvre des matériels électriques - Autres matériels
Ta slovenski standard je istoveten z: IEC 60364-5-55-am2
ICS:
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

IEC 60364-5-55
Edition 1.0 2008-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 2
AMENDEMENT 2
Electrical installations of buildings –
Part 5-55: Selection and erection of electrical equipment – Other equipment

Installations électriques des bâtiments –
Partie 5-55: Choix et mise en oeuvre des matériels électriques – Autres matériels

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
L
CODE PRIX
ICS 91.140 ISBN 2-8318-9943-5
– 2 – 60364-5-55 Amend. 2 © IEC:2008
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:
CDV Report on voting
64/1591/CDV 64/1627RVC
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 maintenance result 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• withdrawn,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.
_____________
Page 3
CONTENTS
Replace the title of Annex A by the following new title:
List of notes concerning certain countries

Page 7
550 Introduction
Replace the existing text of 550.1 and 550.2 by the following new text:
550.1 Scope
This part of IEC 60364 covers requirements for the selection and erection of low-voltage
generating sets and for the selection and erection of luminaires and lighting installations
intended to be part of the fixed installation.
550.2 Normative references
The following referenced documents are indispensable for the application 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 60050(195) International Electrotechnical Vocabulary – Part 195: Earthing and protection
against electric shock
60364-5-55 Amend. 2 © IEC:2008 – 3 –
IEC 60050(826), International Electrotechnical Vocabulary – Part 826: Electrical installations
of buildings
IEC 60079 (all parts), Electrical apparatus for explosive gas atmospheres
IEC 60245-3, Rubber insulated cables – Rated voltages up to and including 450/750 V –
Part 3: Heat resistant silicone insulated cables
IEC 60364-1:2005, Low-voltage electrical installations – Part 1: Fundamental principles,
assessment of general characteristics, definitions
IEC 60364-4-41:2005, Low-voltage electrical installations – Part 4-41: Protection for safety –
Protection against electric shock
IEC 60364-4-42, Electrical installations of buildings – Part 4-42: Protection for safety –
Protection against thermal effects
IEC 60364-4-43, Electrical installations of buildings – Part 4-43: Protection for safety –
Protection against overcurrent
IEC 60364-5-53, Electrical installations of buildings – Part 5-53: Selection and erection of
electrical equipment – Isolation, switching and control
IEC 60364-7-712, Electrical installations of buildings – Part 7-712: Requirements for special
installations or locations – Solar photovoltaic (PV) power supply systems
IEC 60364-7-717, Electrical installations of buildings – Part 7-717: Requirements for special
installations or locations – Mobile or transportable units
IEC 60417 (all parts), Graphical symbols for use on equipment
IEC 60598 (all parts), Luminaires
IEC 61140, Protection against electric shock – Common aspects for installation and
equipment
Page 9
551 Low-voltage generating sets
Replace the existing text of Clause 551 by the following new text:
551.1 Scope
This clause provides requirements for the selection and erection of low-voltage and extra-low
voltage generating sets intended to supply, either continuously or occasionally, all or part of
the installation. Requirements are also included for installations with the following supply
arrangements:
– supply to an installation which is not connected to a system for distribution of electricity to
the public;
– supply to an installation as an alternative to a system for distribution of electricity to the
public;
– supply to an installation in parallel with a system for distribution of electricity to the public
supply;
– 4 – 60364-5-55 Amend. 2 © IEC:2008
– appropriate combinations of the above.
This part does not apply to self-contained items of extra-low voltage electrical equipment
which incorporate both the source of energy and the energy-using load and for which a
specific product standard exists that includes the requirements for electrical safety.
NOTE Requirements of the electricity distributor should be ascertained before a generating set is installed in an
installation that is connected to a system for distribution of electricity to the public.
551.1.1 Generating sets with the following power sources are considered:
– combustion engines;
– turbines;
– electric motors;
– photovoltaic cells (IEC 60364-7-712 also applies);
– electrochemical accumulators;
– other suitable sources.
551.1.2 Generating sets with the following electrical characteristics are considered:
– mains-excited and separately excited synchronous generators;
– mains-excited and self-excited asynchronous generators;
– mains-commutated and self-commutated static converters with or without by-pass
facilities;
– generating sets with other suitable electrical characteristics.
551.1.3 The use of generating sets for the following purposes is considered:
– supply to permanent installations;
– supply to temporary installations;
– supply to portable equipment which is not connected to a permanent installation;
– supply to mobile units (IEC 60364-7-717 also applies).
551.2 General requirements
551.2.1 The means of excitation and commutation shall be appropriate for the intended use
of the generating set and the safety and proper functioning of other sources of supply shall
not be impaired by the generating set.
NOTE See 551.7 for particular requirements where the generating set may operate in parallel with a system for
the distribution of electricity to the public.
551.2.2 The prospective short-circuit current and prospective earth fault current shall be
assessed for each source of supply or combination of sources which can operate
independently of other sources or combinations. The short-circuit breaking capacity of
protective devices within the installation and, where appropriate, connected to a system for
distribution of electricity to the public, shall not be exceeded for any of the intended methods
of operation of the sources.
NOTE Attention should be given to the power factor specified for protective devices in the installation.
551.2.3 The capacity and operating characteristics of the generating set shall be such that
danger or damage to equipment does not arise after the connection or disconnection of any
intended load as a result of the deviation of the voltage or frequency from the intended
operating range. Means shall be provided to automatically disconnect such parts of the
installation as may be necessary if the capacity of the generating set is exceeded.

60364-5-55 Amend. 2 © IEC:2008 – 5 –
NOTE 1 Attention should be given to the size of individual loads as a proportion of the capacity of the generating
set and to motor starting currents.
NOTE 2 Attention should be given to the power factor specified for protective devices in the installation.
NOTE 3 The installation of a generating set within an existing building or installation may change the conditions
of external influence for the installation (see IEC 60364-1), for example by the introduction of moving parts, parts
at high temperature or by the presence of inflammable fluids and noxious gases, etc.
551.2.4 Provision for isolation shall meet the requirements of Clause 537 for each source or
combination of sources of supply.
551.3 Protective measure: extra-low-voltage provided by SELV and PELV
551.3.1 Additional requirements for SELV and PELV where the installation
is supplied from more than one source
Where a SELV or PELV system may be supplied by more than one source, the requirements
of 414.3 of IEC 60364-4-41 shall apply to each source. Where one or more of the sources is
earthed, the requirements for PELV systems in 414.4 of IEC 60364-4-41 shall apply.
If one or more of the sources does not meet the requirements of 414.3, the system shall be
treated as a FELV system and the requirements of 411.7 of IEC 60364-4-41 shall apply.
551.3.2 Additional requirements where it is necessary to maintain the supply to an extra-low
voltage system
Where it is necessary to maintain the supply to an extra-low voltage system following the loss
of one or more sources of supply, each source of supply or combination of sources of supply
which can operate independently of other sources or combinations shall be capable of
supplying the intended load of the extra-low voltage system. Provisions shall be made so that
the loss of low-voltage supply to an extra-low voltage source does not lead to danger or
damage to other extra-low voltage equipment.
NOTE Such precautions may be necessary in supplies for safety services (see Clause 35 of IEC 60364-1).
551.4 Fault protection (protection against indirect contact)
551.4.1 Fault protection shall be provided for the installation in respect of each source of
supply or combination of sources of supply that can operate independently of other sources or
combinations of sources.
The fault protective provisions shall be selected or precautions shall be taken to ensure that
where fault protective provisions are achieved in different ways within the same installation or
part of an installation according to the active sources of supply, no influence shall occur or
conditions arise that could impair the effectiveness of the fault protective provisions.
NOTE This might, for example, require the use of a transformer providing electrical separation between parts of
the installation using different earthing systems.
551.4.2 The generating set shall be connected so that any provision within the installation
for protection by residual current devices in accordance with IEC 60364-4-41 remains
effective for every intended combination of sources of supply.
NOTE Connection of live parts of the generator with earth may affect the protective measures.
551.4.3 Protection by automatic disconnection of supply
551.4.3.1 General
– 6 – 60364-5-55 Amend. 2 © IEC:2008
Where the protective measure automatic disconnection of supply is used for protection
against electric shock, the r
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