IEC 61936-1:2010/AMD1:2014

IEC 61936-1 ®
Edition 2.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Power installations exceeding 1 kV a.c. –
Part 1: Common rules
Installations électriques en courant alternatif de puissance supérieure à 1 kV –
Partie 1: Règles communes
IEC 61936-1:2010-08/AMD1:2014-02(EN-FR)

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IEC 61936-1 ®
Edition 2.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Power installations exceeding 1 kV a.c. –

Part 1: Common rules
Installations électriques en courant alternatif de puissance supérieure à 1 kV –

Partie 1: Règles communes
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX R
ICS 29.020; 29.080.01 ISBN 978-2-8322-1384-1

– 2 – 61936-1 Amend.1 © IEC:2014
FOREWORD
This amendment has been prepared by IEC technical committee 99: System engineering and
erection of electrical power installations in systems with nominal voltages above 1 kV a.c. and
1,5 kV d.c., particularly concerning safety aspects.
The text of this amendment is based on the following documents:
FDIS Report on voting
99/129/FDIS 99/131/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 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• withdrawn,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.
_____________
Foreword
Insert, in the existing list of differences in some countries, the following new items:

• 7.2.6: 50 mm × 200 mm mesh is not accepted (Australia)
• 7.2.6: Guidance regarding fence construction can be found at ENA Doc 015 (Australia)
• 8.7.1: Fire rating of barriers must be a minimum fire rating of 120 minutes (Australia)
• 8.7.2: The dimensions G and G are to be measured from the inside edge wall of any
1 2
bund wall rather than the measured point shown in Figure 7a) and 7b) from the
transformer where the bund wall is wider than the transformer (Australia)
• 8.8.1.3: Spill containment should extend by 50 % of the height of the transformer
(Australia)
• Figure 7a): The dimensions G and G are to be measured from the inside edge wall of
1 2
any bund wall rather than the measured point shown in Figure 7a) from the transformer
where the bund wall is wider than the transformer (Australia)
• Figure 7b): The dimensions G and G are to be measured from the inside edge wall of
1 2
any bund wall rather than the measured point shown in Figure 7b) from the transformer
where the bund wall is wider than the transformer (Australia)
• Clause 10: For requirements regarding earthing refer to AS 2067, Substations and High
Voltage Installations (Australia)
1 Scope
Add the following new item e) after d):
e) Electrical installations erected on offshore platforms e.g. offshore wind power farms.

61936-1 Amend.1 © IEC:2014 – 3 –
Modify the fifth dashed item in the last list of this clause as follows:
– installations on ships according to IEC 60092 [34] series and offshore units according to
IEC 61892 [35] series, which are used in the offshore petroleum industry for drilling,
processing and storage purposes.
Modify the first paragraph after the last list of this clause as follows:
This standard does not apply to the design of prefabricated, type-tested switchgear and high
voltage/low voltage prefabricated substation, for which separate IEC standards exist.
2 Normative references
Add, to the existing list, the title of the following standards:
IEC/TS 61463, Bushings – Seismic qualification
IEC 62271-206, High-voltage switchgear and controlgear – Part 206: Voltage presence
indicating systems for rated voltages above 1 kV and up to and including 52 kV
IEC 62271-207, High-voltage switchgear and controlgear – Part 207: Seismic qualification for
gas-insulated switchgear assemblies for rated voltages above 52 kV
IEC/TR 62271-300, High-voltage switchgear and controlgear – Part 300: Seismic qualification
of alternating current circuit-breakers
IEC 82079-1, Preparation of instructions for use – Structuring, content and presentation –
Part 1: General principles and detailed requirements
Replace the reference to IEC 62271-1:2007 by the following new reference:
IEC 62271-1:2007, High-voltage switchgear and controlgear – Part 1: Common specifications
Amendment 1:2011
4.1.2 Agreements between supplier (manufacturer) and user
Add the following four new lines to the existing table:
Subclause Item
4.3.9 Special conditions and requirements for seismic environment
4.4.3.5 Special conditions and requirements for vibrations
8.7.2.1 Reduction of distances G /G
1 2
10.2.1 Fundamental requirements for design of the earthing system

4.2.4 Short-circuit current
Add the following Note 1 after the first paragraph:
NOTE 1 Where an installation has on-site generation, motors or parallel operation with a network (co-generation),
fault levels can increase.
Change the existing Note 1 to Note 2, and the existing Note 2 to Note 3.

– 4 – 61936-1 Amend.1 © IEC:2014
4.2.7 Electric and magnetic fields
Modify the existing note as follows:
NOTE National and/or international regulations may specify acceptable levels. Further information is available
from International Commission on Non-Ionizing Radiation Protection (ICNIRP) or IEEE.
4.3.1 Equipment and supporting structures
Replace the existing Note 1 by the following normal text:
Consideration shall be given to temporary stresses and loads that may be applied during
construction or maintenance procedures. Specific equipment can be affected by cyclic loads
and stresses due to thermal expansions (refer to specific equipment standards).
Delete Note 2.
Add, at the end of the second list, the following new item:
– seismic loads.
4.3.9 Vibration
Replace the existing title and text of this subclause with the following:
4.3.9 Seismic loads
Special conditions and requirements shall be agreed between user and supplier. (See also
4.4.3.5 Vibration).
Installations situated in a seismic environment shall be designed to take this into account.
Where load specifications apply to the installation of civil work or equipment to meet seismic
conditions, then these specifications shall be observed.
Seismic loads shall be dealt with in accordance with appropriate standards for power
installations: e.g. IEC 62271-207 for GIS, IEC/TR 62271-300 for circuit-breakers and
IEC/TS 61463 for bushings.
The following measures shall be taken into account:
a) Any individual equipment shall be designed to withstand the dynamic forces resulting from
the vertical and horizontal motions of the soil. These effects may be modified by the
response of the foundation and/or the supporting frame and/or the floor in which this
equipment is installed. The response spectrum of the earthquake shall be considered for
the design of the equipment.
b) The layout shall be chosen in order to limit the loads due to interconnections between
adjoining devices needing to accommodate large relatively axial, lateral, torsional or other
movements to acceptable values. Attention should be paid to other stresses which may
develop during an earthquake.
4.4.3.5 Vibration
Replace the existing text of this subclause with the following:
Special conditions and requirements shall be agreed between user and supplier. (See also
4.3.9 Seismic loads).
61936-1 Amend.1 © IEC:2014 – 5 –
Vibration caused by wind, electromagnetic stresses, traffic (e. g. temporary road and railway
traffic) and industrial processes shall be considered. The withstand capability of equipment
against vibrations shall be given by the manufacturer.
The service stresses of equipment, which may be transmitted through a common monolithic
foundation or floor (for example opening/reclosing of circuit-breakers) shall be taken into
account.
5.4.1 General
Replace the first sentence of the second paragraph with the following:
If parts of an installation can be separated from each other by a disconnector, these parts
shall be tested at the rated impulse withstand voltage for the isolating distance (see Tables 1a
and 1b as well as Tables 2a and 2b of IEC 62271-1:2007, Amendment 1:2011).
Table 2 – Minimum clearances in air – Voltage range II (U > 245 kV)
m
Replace the existing Table 2 with the following new Table 2:
Table 2 – Minimum clearances in air – Voltage range II
(U > 245 kV)
m
Highest Rated Rated Rated
voltage for lightning switching Minimum
...