Low-voltage electrical installations - Part 5-53: Selection and erection of electrical equipment - Isolation, switching and control - Clause 534: Devices for protection against transient overvoltages

IEC 60364-5-53 deals with general requirements for isolation, switching and control and with the requirements for selection and erection of the devices provided to fulfil such functions. Clause 534 contains provisions for the application of voltage limitation in order to obtain insulation coordination in the cases described in HD 60364-4-44, EN 60664-1, EN 62305-1, EN 62305-4 and CLC/TS 61643-12. Clause 534 focuses mainly on the requirements for the selection and erection of SPDs for protection against transient overvoltages where required by IEC 60364-4-44:2007, Clause 443, the EN 62305 series, or as otherwise specified. Clause 534 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 CLC/TS 61643-12. Clause 534 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.

Errichten von Niederspannungsanlagen - Teil 5-53: Auswahl und Errichtung elektrischer Betriebsmittel - Trennen, Schalten und Steuern - Abschnitt 534: Überspannungs-Schutzeinrichtungen (SPDs)

Installations électriques à basse tension - Partie 5-53: Choix et mise en oeuvre des matériels électriques - Sectionnement, coupure et commande - Article 534: Dispositifs de protection contre les surtensions transitoires

L’IEC 60364-5-53 traite des prescriptions générales relatives au sectionnement, à la coupure et à la commande, ainsi que des prescriptions relatives au choix et à la mise en œuvre des dispositifs assurant ces fonctions. L'Article 534 contient des dispositions pour l’application de la limitation de tension afin de réaliser la coordination de l’isolement dans les cas décrits dans le HD 60364-4-44, l'EN 60664-1, l'EN 62305-1, l'EN 62305-4 et la CLC/TS 61643-12. L'Article 534 porte principalement sur les exigences relatives au choix et à l'installation des parafoudres pour la protection contre les surtensions transitoires conformément aux exigences de l'IEC 60364-4-44:2007, Article 443, de la série EN 62305 ou suivant une spécification contraire. L'Article 534 ne prend pas en compte: - les composants de protection contre les surtensions pouvant être incorporés dans les matériels d'utilisation connectés à l'installation; - les parafoudres mobiles. NOTE De plus amples informations sont disponibles dans la CLC/TS 61643-12. L'Article 534 s'applique à des circuits de puissance en courant alternatif. Pour les circuits de puissance en courant continu, les exigences du présent article peuvent s'appliquer autant que possible.

Nizkonapetostne električne inštalacije - 5-53. del: Izbira in namestitev električne opreme - Ločevanje, stikanje in krmiljenje - 534. točka: Naprave za prenapetostno zaščito

Podaja zahteve za postavitev in izbiro naprav za prenapetostno zaščito v inštalacijah stavb za doseganje omejitve začasne prenapetosti atmosferskega izvora, ki jih prenaša distribucijski sistem, in zaščito pred stikalno prenapetostjo, ki jo povzroči oprema v inštalaciji. Izbira in postavitev naprav za prenapetostno zaščito je potrebna tudi za zaščito pred neposrednimi udari strele ali udari strele v bližini stavb.

General Information

Status
Withdrawn
Publication Date
18-Feb-2016
Withdrawal Date
13-Dec-2018
Current Stage
9960 - Withdrawal effective - Withdrawal
Start Date
14-Aug-2023
Completion Date
14-Aug-2023

Relations

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HD 60364-5-534:2016 - BARVE
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Frequently Asked Questions

HD 60364-5-534:2016 is a standardization document published by CLC. Its full title is "Low-voltage electrical installations - Part 5-53: Selection and erection of electrical equipment - Isolation, switching and control - Clause 534: Devices for protection against transient overvoltages". This standard covers: IEC 60364-5-53 deals with general requirements for isolation, switching and control and with the requirements for selection and erection of the devices provided to fulfil such functions. Clause 534 contains provisions for the application of voltage limitation in order to obtain insulation coordination in the cases described in HD 60364-4-44, EN 60664-1, EN 62305-1, EN 62305-4 and CLC/TS 61643-12. Clause 534 focuses mainly on the requirements for the selection and erection of SPDs for protection against transient overvoltages where required by IEC 60364-4-44:2007, Clause 443, the EN 62305 series, or as otherwise specified. Clause 534 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 CLC/TS 61643-12. Clause 534 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.

IEC 60364-5-53 deals with general requirements for isolation, switching and control and with the requirements for selection and erection of the devices provided to fulfil such functions. Clause 534 contains provisions for the application of voltage limitation in order to obtain insulation coordination in the cases described in HD 60364-4-44, EN 60664-1, EN 62305-1, EN 62305-4 and CLC/TS 61643-12. Clause 534 focuses mainly on the requirements for the selection and erection of SPDs for protection against transient overvoltages where required by IEC 60364-4-44:2007, Clause 443, the EN 62305 series, or as otherwise specified. Clause 534 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 CLC/TS 61643-12. Clause 534 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.

HD 60364-5-534:2016 is classified under the following ICS (International Classification for Standards) categories: 29.130 - Switchgear and controlgear; 91.140.50 - Electricity supply systems. The ICS classification helps identify the subject area and facilitates finding related standards.

HD 60364-5-534:2016 has the following relationships with other standards: It is inter standard links to HD 60364-5-53:2022. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase HD 60364-5-534:2016 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CLC standards.

Standards Content (Sample)


SLOVENSKI STANDARD
01-april-2016
1DGRPHãþD
SIST HD 60364-5-534:2008
1L]NRQDSHWRVWQHHOHNWULþQHLQãWDODFLMHGHO,]ELUDLQQDPHVWLWHYHOHNWULþQH
RSUHPH/RþHYDQMHVWLNDQMHLQNUPLOMHQMHWRþND1DSUDYH]DSUHQDSHWRVWQR
]DãþLWR
Low-voltage electrical installations - Part 5-53: Selection and erection of electrical
equipment - Isolation, switching and control - Clause 534: Devices for protection against
overvoltages
Installations électriques à basse tension - Partie 5-53: Choix et mise en oeuvre des
matériels électriques - Sectionnement, coupure et commande - Article 534: Dispositifs
pour la protection contre les surtensions
Ta slovenski standard je istoveten z: HD 60364-5-534:2016
ICS:
29.120.99 'UXJDHOHNWULþQDGRGDWQD Other electrical accessories
RSUHPD
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.

HARMONIZATION DOCUMENT HD 60364-5-534

DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT
February 2016
ICS 29.130; 91.140.50 Supersedes HD 60364-5-534:2008
English Version
Low-voltage electrical installations - Part 5-53: Selection and
erection of electrical equipment - Isolation, switching and control -
Clause 534: Devices for protection against transient overvoltages
(IEC 60364-5-53:2001/A2:2015 , modified)
Installations électriques à basse tension - Partie 5-53: Choix Errichten von Niederspannungsanlagen - Teil 5-53:
et mise en oeuvre des matériels électriques - Auswahl und Errichtung elektrischer Betriebsmittel -
Sectionnement, coupure et commande - Article 534: Trennen, Schalten und Steuern - Abschnitt 534:
Dispositifs de protection contre les surtensions transitoires Überspannung-Schutzeinrichtungen (ÜSE)
(IEC 60364-5-53:2001/A2:2015 , modifiée) (IEC 60364-5-53:2001/A2:2015 , modifiziert)
This Harmonization Document was approved by CENELEC on 2015-12-14. CENELEC members are bound to comply with the
CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this Harmonization Document at national level.
Up-to-date lists and bibliographical references concerning such national implementations may be obtained on application to the CEN-
CENELEC Management Centre or to any CENELEC member.
This Harmonization Document exists in three official versions (English, French, German).
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. HD 60364-5-534:2016 E

European foreword
The text of document 64/2031/FDIS, future IEC 60364-5-53:2001/A2 prepared by IEC/TC 64 “Electrical
installations and protection against electric shock” was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as HD 60364-5-534:2016.
A draft amendment, which covers common modifications to IEC 60364-5-53:2001/A2:2015
(64/2031/FDIS), was prepared by CLC/TC 64 “Electrical installations and protection against electric
shock” and approved by CENELEC.
The following dates are fixed:
• latest date by which the document has to be implemented at (dop) 2016-12-14
national level by publication of an identical national
standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2018-12-14
document have to be withdrawn
edition: this document constitutes a complete structural and technical revision of HD 60364-5-534:2008.
The most significant technical change refers to the selection requirements for the voltage protection level.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Clauses, subclauses, notes, tables, figures and annexes which are additional to those in
IEC 60364-5-53:2001/A2:2015 are prefixed “Z”.
Endorsement notice
The text of the International Standard IEC 60364-5-53:2001/A2:2015 was approved by CENELEC as a
Harmonization Document with agreed common modifications.
COMMON MODIFICATIONS
530.2 Normative references
Replace the text of 530.2 by the following:
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.
EN 60038, CENELEC standard voltages (IEC 60038)
HD 60364-4-41:2007 + corr. Jul. 2007, Low-voltage electrical installations - Part 4-41: Protection for
safety - Protection against electric shock (IEC 60364-4-41:2005, mod.)
HD 60364-4-43:2010, Low-voltage electrical installations - Part 4-43: Protection for safety - Protection
against overcurrent (IEC 60364-4-43:2008, mod. + corr. Oct. 2008)
HD 60364-4-443:2016, Low-voltage electrical installations - Part 4-44: Protection for safety - Protection
against voltage disturbances and electromagnetic disturbances - Clause 443: Protection against transient
overvoltages of atmospheric origin or due to switching (IEC 60364-4-44:2007/A1:2015, mod.)
HD 60364-5-54, Low-voltage electrical installations - Part 5-54: Selection and erection of electrical
equipment - Earthing arrangements and protective conductors (IEC 60364-5-54)
EN 60664-1:2007, Insulation coordination for equipment within low-voltage systems - Part 1: Principles,
requirements and tests (IEC 60664-1:2007)
EN 61643-11:2012, Low-voltage surge protective devices - Part 11: Surge protective devices connected
to low-voltage power systems - Requirements and test methods (IEC 61643-11:2011, mod.)
CLC/TS 61643-12, Low-voltage surge protective devices - Part 12: Surge protective devices connected to
low-voltage power distribution systems - Selection and application principles (IEC 61643-12)
EN 62305-1, Protection against lightning - Part 1: General principles (IEC 62305-1)
EN 62305-2, Protection against lightning - Part 2: Risk management (IEC 62305-2)
EN 62305-4, Protection against lightning - Part 4: Electrical and electronic systems within structures
(IEC 62305-4)
IEC/TR 60664-2-1:2011, Insulation coordination for equipment within low-voltage systems - Part 2-1:
Application guide - Explanation of the application of the IEC 60664 series, dimensioning examples and
dielectric testing
530.3 Terms and definitions
Add Clause 530.3 “Terms and definitions” as follows:
530.3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
530.3.101
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
530.3.102
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]
530.3.103
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]
530.3.104
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]
530.3.105
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]
530.3.106
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 (U ) of the combination wave generator, determined
OC
for the combination wave for test class III.
Note 2 to entry: Information on the correlation between SPD Types and test classes according to the product
standard is provided in Annex C.
[SOURCE: IEC 61643-11:2011, 3.1.14, mod. — Note 1 to entry is modified and Note 2 to entry is added.]
530.3.107
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. — The abbreviation 'U ' is added.]
W
530.3.108
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]
530.3.109
nominal discharge current for class II test
I
n
crest value of the current through the SPD having a current waveshape of 8/20
Note 1 to entry: Information on the correlation between SPD Types and test classes according to the product
standard is provided in Annex C.
[SOURCE: IEC 61643-11:2011, 3.1.9, mod. — Note 1 to entry is added.]
530.3.110
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
Note 1 to entry: Information on the correlation between SPD Types and test classes according to the product
standard is provided in Annex C.
[SOURCE: IEC 61643-11:2011, 3.1.10, mod. — Note 1 to entry is added.]
530.3.111
open circuit voltage
U
OC
open circuit voltage of the combination wave generator at the point of connection of the device under test
[SOURCE: IEC 61643-11:2011, 3.1.23]
530.3.112
two-port SPD
SPD having a specific series impedance connected between separate input and output connections
[SOURCE: IEC 61643-11:2011, 3.1.3]
534 Devices for protection against transient overvoltages
534.1 General
Replace the 2 first paragraphs under 534.1 as follows:
This clause contains provisions for the application of voltage limitation in order to obtain insulation
coordination in the cases described in HD 60364-4-44, EN 60664-1, EN 62305-1, EN 62305-4 and
CLC/TS 61643-12.
This clause focuses mainly on the requirements for the selection and erection of SPDs for protection
against transient overvoltages where required by IEC 60364-4-44:2007, Clause 443, the EN 62305
series, or as otherwise specified.
Replace the title of 534.4.1 and all paragraphs before NOTE 3, except NOTE 1, as follows:
534.4.1 SPD location and type of SPD
SPDs shall at least be installed as close as possible to the origin of the installation. For protection against
effects of lightning and against switching overvoltages Type 2 SPDs shall be used.
If the structure is equipped with an external lightning protection system or protection against effects of
direct lightning is otherwise specified, Type 1 SPDs shall be used.
Where the structure is not equipped with an external lightning protection system and where the
occurrence of direct lightning strike to the overhead lines between the last pole and the entrance of the
installation is to be taken into consideration, Type 1 SPDs at or near the origin of the electrical installation
may be also selected according to Annex B.
Following the product standard, the marking of the product is as follows:
– for Type 1 SPDs: either “Type 1” and/or “T1“ (T1 in a square);
– for Type 2 SPDs: either “Type 2” and/or “T2“ (T2 in a square);
– for Type 3 SPDs: either “Type 3” and/or “T3” (T3 in a square).
NOTE 2 Information on the correlation between SPD Types and test classes according to the product standard is
provided in Annex C.
Additional Type 2 or Type 3 SPDs may be needed to sufficiently protect the installation according to
534.4.4.1 and shall be located downstream in the fixed electrical installation, for example in the sub-
distribution boards or at socket outlets. These SPDs shall not be used without SPDs being installed at the
origin of the installation and shall be coordinated with SPDs located upstream (see 534.4.4.5).
If a Type 1 SPD is not able to provide protection according to 534.4.4.2, it shall be accompanied by a
coordinated Type 2 or Type 3 SPD to ensure the required voltage protection level.
Additional Type 2 SPDs or Type 3 SPDs may be needed close to sensitive equipment to sufficiently
protect the equipment according to 534.4.4.2 and shall be coordinated with SPDs located upstream.
Replace Figure 534.1 and its title as follows:

Type 1 SPD Type 2 SPD Type 2 SPD
and/or or or
Type 2 SPD Type 3 SPD Type 3 SPD
Figure 534.1 — Example of installation of Type 1, Type 2 and Type 3 SPDs
534.4.4.2 Selection of voltage protection level (U ) as a function of equipment rated impulse
p
voltage (U )
W
Replace the introductory paragraph for the four indents as follows:
This recommendation may not be considered where one of the following cases applies:
Replace Table 534.1 as follows:
Table 534.1 — Required rated impulse voltage of equipment (U )
W
b
Nominal voltage of Nominal voltage of
Voltage line to Required rated impulse voltage (U ) of equipment
W
the supply the supply
neutral from
a a
Overvoltage category II Overvoltage category I
system system nominal a.c. or d.c.
(equipment with normal (equipment with reduced
voltages up to and
Three-phase Single-phase
rated impulse voltage) rated impulse voltage)
including
systems systems
V V V kV kV
50 0,5 0,33
100 0,8 0,5
120/240 150 1,5 0,8
230/400
300 2,5 1,5
277/480
400/690 600 4 2,5
1 000 1 000 6 4
c c
1 500 d.c.
8 6
a
According to EN 60038.
b
The rated impulse voltage applies between live conductor and PE.
c
Recommended values based on IEC/TR 60664–2-1:2011, Annex D.
Replace the paragraph after Table 534.1 as follows:
Additional SPDs between live conductors may be needed to avoid equipment malfunctions. An
appropriate voltage protection level needs to be evaluated based on equipment immunity and availability
requirements (see CLC/TS 61643-12).
534.4.4.4 Selection of SPDs with regard to nominal discharge current (I ) and impulse discharge
n
current (I )
imp
Replace the title of Subclause 534.4.4.4.1 and the first paragraph under as follows:
534.4.4.4.1 Type 2 SPDs
Where Type 2 SPDs are required at or near the origin of installation, their nominal discharge current shall
be not less than that given in Table 534.3.
Replace the title of Subclause 534.4.4.4.2 and the first 2 paragraphs under as follows:
534.4.4.4.2 Type 1 SPDs
Where Type 1 SPDs are required at or near the origin of the installation, one of the following cases
applies:
a) Where no risk analysis according to EN 62305-2 has been carried out, the impulse discharge current
(I ) shall be not less than as given in Table 534.4.
imp
Replace the indent b) as follows:
b) Where the risk analysis according to EN 62305-2 has been carried out, the impulse discharge current
(I ) shall be determined according to the EN 62305 series.
imp
534.4.4.5 Coordination of two or several SPDs
Replace the paragraph under 534.4.4.5 as follows:
Coordination of SPDs in the installation needs to be ensured. The manufacturer's instructions on how to
achieve coordination between SPDs shall be followed with reference CLC/TS 61643-12.
534.4.4.6 Selection of SPDs with regard to the short-circuit current rating I
SCCR
Replace the second paragraph under 534.4.4.6 as follows:
This requirement does not apply to SPDs connected between neutral conductor and PE in TN or TT
systems, for which this is already covered by the product standard EN 61643-11.
534.4.4.7 Selection of SPDs with regard to the follow current interrupting rating
Replace the second paragraph under 534.4.4.7 as follows:
This requirement does not apply to SPDs connected between neutral conductor and PE conductor in TN
or TT systems, for which this is already covered by the product standard EN 61643-11.
534.4.5.3 Selectivity between overcurrent protective devices
Replace the first paragraph under 534.4.5.3 as follows:
Where required, the need for selectivity between overcurrent protective devices shall be considered
according to the installation conditions at the point of installation of the SPD and the information provided
by the manufacturer (See HD 60364-5-53:2014, Clause 536).
534.4.6 Fault protection
Replace the first paragraph under 534.4.6 as follows:
Fault protection, as defined in HD 60364-4-41, shall remain effective in the protected installation even in
the event of SPD failures.
Replace the indent b) as follows:
b) the installation of SPDs upstream of the main RCD. Because of the possibility of a failure of an SPD
connected between neutral conductor and PE, the conditions of HD 60364-4-41:2007, 411.4.1, shall be
met and the SPDs shall be installed in accordance with connection type CT2.
534.4.7 SPDs installation in conjunction with RCDs
Replace NOTE 1 and the last paragraph under 534.4.7 as follows:
NOTE 1 S-type RCDs in accordance with EN 61008–1 and EN 61009–1 satisfy this requirement.
Installation of Type 1 SPDs downstream of an RCD is not recommended.
534.4.10 Connecting conductors of SPDs
Replace the 2 indents after the first paragraph under 534.4.10 as follows:
– 6 mm copper or equivalent for Type 2 SPDs installed at or near the origin of the installation;
– 16 mm copper or equivalent for Type 1 SPDs installed at or near the origin of the installation.
Replace the last 2 indents as follows:
– 2,5 mm copper or equivalent for Type 2 SPDs installed at or near the origin of the installation;
– 6 mm copper or equivalent for Type 1 SPDs installed at or near the origin of the installation.
Annex B
(informative)
Installations supplied by overhead lines
Replace the first 2 paragraphs as follows:
Where overvoltage protection according to HD 60364-4-443:2016, Clause 443, is required, where the
lines entering the building are overhead and where the case of lightning strike to the last pole of the
overhead lines close to the building is taking into account, SPDs at the origin of the installation shall be
selected according to Table B.1.
Further information can be found in EN 62305 series.
Replace Annex C by the following new Annex C:
Annex C
(informative)
Correlation between SPD Types and test classes
according to the product standard EN 61643-11
Table C.1 — Type 1, Type 2 and Type 3 SPDs and
corresponding test classes I, II and III
Reference
Type of SPD Test class
parameter
I
Type 1 test class I
imp
I
Type 2 test class II
n
U
Type 3 test class III
oc
Add Annex ZA and Annex ZB as follows:
Annex ZA
(normative)
Special national conditions
Special national condition: National characteristic or practice that cannot be changed even over a long
period, e.g. climatic conditions, electrical earthing conditions.
NOTE If it affects harmonization, it forms part of Harmonization Document.
For the countries in which the relevant special national conditions apply these provisions are normative,
for other countries they are informative.
Clause Special national condition
534.4.1 France
The following content:
Where the structure is not equipped with an external lightning protection system and
where the occurrence of direct lightning strike to the overhead lines between the last
pole and the entrance of the installation is to be taken into consideration, Type 1
SPDs at or near the origin of the electrical installation may be also selected according
to Annex B.
is not applied in France
534.4.1 Germany
In Germany, where the installation of a building is supplied by overhead lines, SPDs
shall be Type 1 according Annex B.
534.4.3 Germany
In Germany, the restriction to a maximum distance of 0,5 m is the only requirement to
be considered.
534.4.4.2 Norway
In Norway, where the installation is galvanic connected to a public IT-distribution
network, the minimum required U for a SPD located at the origin of the installations
c
shall be at least 350 V.
Clause Special national condition
534.4.4.4.1 Germany
Add the following text and additional table:
The nominal discharge current of Type 2 SPDs installed at or near the origin of
installations with increased safety level, shall not be less than given in Table 534.3
below:
Table 534.3 — Nominal discharge current (I ) in kA depending on supply
n
system and connection type for installations with increased safety level
Supply system
Single-phase Three-phase
Connection
Connection Connection Connection Connection

type 1 type 2 type 1 type 2
L – N 10 10
L – PE 10 10
N – PE 10 20 10 40
534.4.4.4.2 Germany
In Germany, where the installation of a building is supplied by overhead lines, SPDs
shall be Type 1 according Annex B.
534.4.4.5 Norway
In Norway, where the installation is galvanically connected to a public IT-distribution
network, and where a second SPD is installed downstream of the SPD located in the
main distribution board, the maximum continuous operating voltage, U , for the
c
second SPD shall be at least 440 V between line conductors and PE, and at least
275 V between line conductors.
534.4.6 Germany
In order to avoid false tripping or welding of the RCDs contacts the flow of high
impulses currents or partial lightning currents should be avoided. Therefore, SPDs
Type 1 or Type 2 at or near the origin of installation should be installed on the line
side of an RCD. If the surge is expected from the load side, e.g. due to external
mounted equipment, not protected by a LPS, SPDs Type 1 or Type 2 should be
installed on the load side of an RCD.
Clause Special national condition
534.4.6 Norway
In Norway, where the installation is galvanically connected to a public IT or TT
distribution network without the provision of a distributed PE conductor (i.e.
installation supplied by overhead lines), protection against fire caused by a failure of
the SPD located in the main distribution board shall be ensured by:
– locating the SPD in a separate enclosure of non-combustible materials; or
– protecting the SPD by a time-delayed RCD (S-type or similar) with a rated
residual operating current not exceeding 300 mA; or
– using an SPD constructed so as to minimize the risk of damage and fire due to an
earth failure in the high-voltage distribution network.
534.4.7 Germany
It should be ensured that lightning currents or high impulse currents will not flow
through the RCD. Therefore, the installation of class I tested SPDs downstream the
RCD is not admissible, except partial lightning currents may be expected from the
load side of the RCD.
The installation of class II tested SPDs downstream of the RCD is admissible, only if
already a class II tested SPD is installed upstream of the RCD or if impulse currents
are expected from the load side of the RCD.
In case of surge currents higher than 3 kA 8/20, the RCD may trip causing
interruption of the power supply.
Annex A Germany
In Germany, earthing connections 5a and 5b are required for SPDs installed at the
origin of installation.
Annex B France
Annex B is not applied in France.
Annex B Germany
Annex B is normative in Germany.
Annex ZB
(informative)
A-deviations
A-deviation: National deviation due to regulations, the alteration of which is for the time being outside the
competence of the CEN-CENELEC national member.
This Harmonization Document does not fall under any Directive of the EU.
In the relevant CEN–CENELEC countries, these A-deviations are valid instead of the provisions of the
Harmonization Document until they have been removed.
Clause Deviation
534.4.6 Austria
534.4.7 Electrotechnical Ordinance 2002 - Federal gazette Part II No. 222/2002
amended by
Electrotechnical Ordinance 2002/A1 - Federal gazette Part II No. 33/2006
amended by
Electrotechnical Ordinance 2002/A2 - Federal gazette Part II No. 223/2010):
In Austria, the SPD assembly at or near the origin of the installation may not be
installed downstream of any RCD.
534.4.11AT Austria
Electrotechnical Ordinance 2002 - Federal gazette Part II No. 222/2002
amended by
Electrotechnical Ordinance 2002/A1 - Federal gazette Part II No. 33/2006
amended by
Electrotechnical Ordinance 2002/A2 - Federal gazette Part II No. 223/2010):
Addition:
534.4.11AT Measurement of the insulation resistance
If SPDs mounted in a distribution board may significantly influence the insulation
resistance measurement of the installation, they shall be clearly labelled:
e.g. SPDs shall be disconnected for insulation measurements!
SPDs not incorporated in a distribution board, which are connected to the PE
conductor, shall withstand the insulation resistance measurement without a significant
influence on the measurement results.
Replace the bibliography as follows:
Bibliography
EN 61008-1, Residual current operated circuit-breakers without integral overcurrent protection for
household and similar uses (RCCBs) - Part 1: General rules (IEC 61008-1)
EN 61009-1, Residual current operated circuit-breakers with integral overcurrent protection for household
and similar uses (RCBOs) - Part 1: General rules (IEC 61009-1)

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 60364-5-53:2001/AMD2:2015 – 3 –
© 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 60364-5-53:2001/AMD2:2015 – 5 –
© 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 installed as close as possible to the origin of the installation. For
protection against effects of lightning and against switching overvoltages, class II tested
SPDs shall be used.
Where the structure is equipped with an external lightning protection system or protection
against effects of direct lightning is otherwise specified, class I tested SPDs shall be used.
Where the structure is not equipped with an external lightning protection system and where
the occurrence of direct lightning strike to the overhead lines between the last pole and the
entrance of the installation is to be taken into consideration, class I tested SPDs at or near
the origin of the electrical installation may be also selected according to Annex B.
NOTE 1 The origin of the installation could be the location where the supply enters the building or the main
distribution board.
NOTE 2 Following the product standard, the marking of the product is as follows:
- for test class I: either “test class I” and/or “T1“ (T1 in a square);
- for test class II: either “test class II” and/or “T2“ (T2 in a square);
- for test class III: either “test class III, and/or “T3“(T3 in a square).
Additional class II tested or class III tested SPDs may be needed to sufficiently protect the
installation according to 534.4.4.2 and shall be located downstream in the fixed electrical
installation, for example in the sub-distribution boards or at the socket outlets. These SPDs
shall not be used without SPDs being installed at the origin of the installation and shall be
coordinated with SPDs located upstream (see 534.4.4.5).
If a class I tested SPD is not able to provide protection according to 534.4.4.2, it shall be
accompanied by a coordinated class II tested or class III tested SPD to ensure the required
voltage protection level.
– 6 – IEC 60364-5-53:2001/AMD2:2015
© IEC 2015
Additional class II tested SPDs or class III tested SPDs may be needed close to sensitive
equipment to sufficiently protect the equipment according to Table 534.1 and shall be
coordinated with SPDs located upstream.
NOTE 3 Such additional SPDs may be part of the fixed electrical installation or may be portable SPDs.
Additional SPDs may be necessary to provide transient overvoltage protection regarding
threats coming from other sources such as:
– switching overvoltages produced by current using equipment located within the
installation;
– overvoltages on other incoming services such as telephone lines, internet connections;
– overvoltages on other services feeding other structures such as secondary buildings,
external installations/lighting, power lines feeding external sensors;
in which case one should consider installing SPDs located as close as possible to the origin
of such threats. More information may be found in IEC 61643-12.

Figure 534.1 – Example of installation of class I, class II and class III tested SPDs
The presence of SPDs installed downstream of a distribution board (e.g. in a socket-outlet)
shall be permanently indicated (e.g. by a label) in this distribution board.
534.4.2 Transient overvoltage protection requirements
Protection against transient overvoltages may be provided:
– between live conductors and PE (common mode protection);
– between live conductors (differential mode protection)
NOTE 1 Connection type CT1 provides primarily common mode protection. If differential mode protection is also
necessary, this will in most cases require additional SPDs between live conductors.
NOTE 2 Connection type CT2 provides a combination of common mode protection and differential mode
protection.
Protection between live conductors and PE (including neutral to PE if there is a neutral
conductor) is compulsory.
Protection between line conductors and neutral (if there is a neutral conductor) is
recommended to ensure equipment protection.
Protection between line conductors (in the case of multiple phases) is optional.

IEC 60364-5-53:2001/AMD2:2015 – 7 –
© IEC 2015
Some equipment may require both common mode protection (for impulse withstand) and
differential mode protection (for impulse immunity).
NOTE 3 For example, electronic class I equipment or class II equipment with FE-connection requires common
mode as well as differential mode protection to ensure overall protection against transient overvoltages due to
switching or from atmospheric origin.
534.4.3 Connection types
Connection type CT1 (e.g. 3+0 or 4+0-configuration): SPD assembly providing a mode of
protection between each live conductor (line and neutral conductors, if available) and PE or
between each line conductor and PEN.
Two examples of connection type CT1 for application in a three-phase system are
represented in Figure 534.2 and in Figure 534.3.
Connection type CT2 (e.g. 3+1-configuration): SPD assembly providing a mode of protection
between each line conductor and the neutral conductor, and between the neutral conductor
and PE.
An example of connection type CT2 for application in a three-phase system is represented in
Figure 534.4
L1 L2 L3 N
SS SS
SS SS
PP PP
PP PP
DD DD DD
DD
PE
Figure 534.2 – Connection type CT1 (4+0-configuration) for a three-phase system with
neutral
L1 L2 L3
S
SS SS SS
PP P
PP PP
DD DD D
DD
PEN
Figure 534.3 – Connection type CT1 (3+0-configuration) for a three-phase system

– 8 – IEC 60364-5-53:2001/AMD2:2015
© IEC 2015
L1 L2 L3 N
SS SS
SS
PP
PP
PP
DD
DD DD
SS
PP
DD
PE
Figure 534.4 – Connection type CT2 (e.g. 3+1-configuration)
for a three-phase system with neutral
When assembling SPDs, attention should be drawn to the selection of parameters for SPDs
connected between N and PE, depending on the connection type.
In TN-S or TN-C-S systems, the SPD between neutral and PE may be omitted if the distance
between the separation point of PE to N and the location of the installed SPDs is less than 0,5
m or if the separation point and the SPDs are located in the same distribution board.
If a line conductor is earthed, it is considered to be technically equivalent to a neutral
conductor for the application of this subclause. However correct choice of the SPD
parameters requires special considerations in such case.
534.4.4 Selection of SPDs
534.4.4.1  General
The selection of SPDs shall be based on the following parameters:
– voltage protection level (U ) and rated impulse voltage (U ) of equipment to be protected
p W
(see 534.4.4.2);
– continuous operating voltage (U ), i.e. supply system (TT, TN, IT) (see 534.4.4.3);
c
– nominal discharge current (I ) and impulse discharg
...


S L O V E N S K I SIST HD 60364-5-534
S T A N D A R D april 2016
Nizkonapetostne električne inštalacije – 5-53. del: Izbira in namestitev
električne opreme – Ločevanje, stikanje in krmiljenje –
534. točka: Naprave za prenapetostno zaščito
Low-voltage electrical installations – Part 5-53: Selection and erection of electrical
equipment – Isolation, switching and control – Clause 534: Devices for protection
against overvoltages
Installations électriques à basse tension – Partie 5-53: Choix et mise en oeuvre
des matériels électriques – Sectionnement, coupure et commande – Article 534:
Dispositifs pour la protection contre les surtensions
Errichten von Niederspannungsanlagen – Teil 5-53: Auswahl und Errichtung
elektrischer Betriebsmittel – Trennen, Schalten und Steuern – Abschnitt 534:
Überspannung-Schutzeinrichtungen (ÜSE)
Referenčna oznaka
ICS 29.130; 91.140.50 SIST HD 60364-5-534:2016 (sl)
Nadaljevanje na straneh II in III ter od 1 do 53
© 2023-03. Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno.

SIST HD 60364-5-534 : 2016
NACIONALNI UVOD
Standard SIST HD 60364-5-534 (sl), Nizkonapetostne električne inštalacije – 5-53. del: Izbira in
namestitev električne opreme – Ločevanje, stikanje in krmiljenje – 534. točka: Naprave za
prenapetostno zaščito, 2016, ima status slovenskega standarda in je istoveten evropskemu standardu
HD 60364-5-534 (en), Low-voltage electrical installations – Part 5-53: Selection and erection of electrical
equipment – Isolation, switching and control – Clause 534: Devices for protection against transient
overvoltages, 2016.
Ta standard nadomešča SIST HD 60364-5-534:2008.

NACIONALNI PREDGOVOR
Evropski standard HD 60364-5-534:2016 je pripravil tehnični odbor CLC/TC 64 Električne inštalacije in
zaščita pred električnim šokom.

Slovenski standard SIST HD 60364-5-534:2016 je prevod evropskega standarda HD 60364-5-
534:2016. V primeru spora glede besedila slovenskega prevoda v tem standardu je odločilen izvirni
evropski standard v angleškem jeziku. Slovensko izdajo standarda je potrdil tehnični odbor SIST/TC ELI
Nizkonapetostne in komunikacijske električne inštalacije.

Odločitev za privzem tega standarda je aprila 2016 sprejel tehnični odbor SIST/TC ELI Nizkonapetostne
in komunikacijske električne inštalacije.

ZVEZA Z NACIONALNIMI STANDARDI

S privzemom tega evropskega standarda veljajo za omejeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno standardizacijo:
SIST EN 60038 Standardne napetosti CENELEC
SIST HD 60364-4-41:2007 + popravek 2007 Nizkonapetostne električne inštalacije – 4-41. del:
Zaščitni ukrepi – Zaščita pred električnim udarom
SIST HD 60364-4-43:2011 Nizkonapetostne električne inštalacije – 4-43. del: Zaščitni
ukrepi – Zaščita pred nadtoki
SIST HD 60364-4-443:2016 Nizkonapetostne električne inštalacije – 4-44. del: Zaščitni
ukrepi – Zaščita pred napetostnimi in elektromagnetnimi
motnjami – 443. točka: Zaščita pred atmosferskimi in stikalnimi
prenapetostmi
SIST HD 60364-5-54 Nizkonapetostne električne inštalacije – 5-54. del: Izbira in
namestitev električne opreme – Ozemljitve in zaščitni vodniki
SIST EN 60664-1:2007 Uskladitev izolacije za opremo v okviru nizkonapetostnih
sistemov – 1. del: Načela, zahteve in preskusi
SIST EN 61643-11:2012 Nizkonapetostne naprave za zaščito pred prenapetostnimi
udari – 11. del: Naprave za zaščito pred prenapetostnimi udari
za nizkonapetostne napajalne sisteme – Zahteve in preskus
SIST-TS CLC/TS 61643-12 Nizkonapetostne naprave za zaščito pred prenapetostnimi
udari – 12. del: Naprave za zaščito pred prenapetostnimi udari
za nizkonapetostne napajalne sisteme – Izbira in načela za
uporabo
SIST EN 62305-1 Zaščita pred delovanjem strele – 1. del: Splošna načela
SIST EN 62305-2 Zaščita pred delovanjem strele – 2. del: Vodenje rizika
SIST EN 62305-4 Zaščita pred delovanjem strele – 4. del: Električni in elektronski
sistemi v zgradbah
II
SIST HD 60364-5-534 : 2016
OSNOVA ZA IZDAJO STANDARDA
– privzem standarda HD 60364-5-534:2016

PREDHODNA IZDAJA
– SIST HD 60364-5-534:2008, Nizkonapetostne električne inštalacije – 5-53. del: Izbira in namestitev
električne opreme - Ločevanje, stikanje in krmiljenje – 534. točka: Naprave za prenapetostno
zaščito
OPOMBE
– Povsod, kjer se v besedilu standarda uporablja izraz “evropski standard“ ali »mednarodni
standard«, v SIST HD 60364-5-534:2016 to pomeni “slovenski standard”.

– Nacionalni uvod in nacionalni predgovor nista sestavni del standarda.

– Ta nacionalni dokument je istoveten HD 60364-5-534:2016 in je objavljen z dovoljenjem

CEN-CENELEC
Upravni center
Avenue Marnix 17
B-1000 Bruselj
This national document is identical with HD 60364-5-534:2016 and is published with the permission
of
CEN-CENELEC
Management Centre
Avenue Marnix 17
B-1000 Brussels
III
SIST HD 60364-5-534 : 2016
(prazna stran)
IV
HARMONIZACIJSKI DOKUMENT HD 60364-5-534
HARMONIZATION DOCUMENT
DOCUMENT D'HARMONISATION
februar 2016
HARMONISIERUNGSDOKUMENT
ICS 29.130; 91.140.50 Nadomešča HD 60364-5-534:2008

Slovenska izdaja
Nizkonapetostne električne inštalacije – 5-53. del: Izbira in namestitev
električne opreme – Ločevanje, stikanje in krmiljenje – 534. točka: Naprave za
prenapetostno zaščito
Low-voltage electrical installations Installations électriques à basse Errichten von Nieders-
– Part 5-53: Selection and erection tension – Partie 5-53: Choix et pannungsanlagen – Teil 5-53:
of electrical equipment – Isolation, mise en oeuvre des matériels Auswahl und Errichtung
switching and control – Clause électriques – Sectionnement, elektrischer Betriebsmittel –
534: Devices for protection against coupure et commande – Article Trennen, Schalten und Steuern –
overvoltages (IEC 60364-5- 534: Dispositifs de protection Abschnitt 534: Überspannung-
53:2001/A2:2015, modified) contre les surtensions transitoires Schutzeinrichtungen (ÜSE)
(IEC 60364-5-53:2001/A2:2015, (IEC 60364-5-53:2001/A2:2015,
modifiée) modifiziert)
Ta harmonizacijski dokument je CENELEC sprejel 14. decembra 2015. Člani CENELEC morajo
izpolnjevati notranje predpise CEN/CENELEC, ki določajo pogoje, pod katerimi dobi ta evropski
standard status nacionalnega standarda.

Najnovejši seznami teh nacionalnih standardov in njihovi bibliografski podatki se na zahtevo lahko dobijo
pri Upravnem centru CEN-CENELEC ali kateremkoli članu CENELEC.

Ta harmonizacijski dokument obstaja v treh izvirnih izdajah (angleški, francoski, nemški).

Člani CENELEC so nacionalni elektrotehniški komiteji Avstrije, Belgije, Bolgarije, Cipra, Češke
republike, Danske, Estonije, Finske, Francije, Grčije, Hrvaške, Islandije, Irske, Italije, Latvije, Litve,
Luksemburga, Madžarske, Malte, Nekdanje jugoslovanske republike Makedonije, Nemčije,
Nizozemske, Norveške, Poljske, Portugalske, Romunije, Slovaške, Slovenije, Španije, Švedske, Švice
in Združenega kraljestva.
,
CENELEC
Evropski komite za standardizacijo v elektrotehniki
European Committee for Electrotechnical Standardisation
Europäisches Komitee für Elektrotechnische Normung
Comité Européen de Normalisation Electrotechnique
Upravni center CEN-CENELEC: Avenue Marnix 17, B - 1000 Bruselj

© 2016 CENELEC Vse pravice do izkoriščanja v kakršnikoli obliki in na kakršenkoli Ref. št. HD 60364-5-534:2016 E
način imajo nacionalni člani CENELEC.

SIST HD 60364-5-534 : 2016
Evropski predgovor
Besedilo dokumenta 64/2031/FDIS, poznejšega standarda IEC 60364-5-53:2001/A2, ki ga je pripravil
tehnični odbor IEC/TC 64 "Električne inštalacije in zaščita pred električnim udarom", je bilo predloženo
v vzporedno glasovanje CENELEC in ga je CENELEC odobril kot HD 60364-5-53.

Osnutek dopolnila, ki obsega skupne popravke k IEC 60364-5-53:2001/A2:2015 (64/2031/FDIS), je
pripravil tehnični odbor CLC/TC 64 "Električne inštalacije in zaščita pred električnim udarom" in ga je
odobril CENELEC.
Določena sta bila naslednja datuma:

‒ zadnji datum, do katerega mora dokument dobiti status (dop) 2016-12-14
nacionalnega standarda bodisi z objavo istovetnega besedila
ali z razglasitvijo
‒ zadnji datum, do katerega je treba razveljaviti nacionalne (dow) 2018-12-14
standarde, ki so v nasprotju s HD

dokument obsega celotno zgradbo in tehnično revizijo standarda HD 60364-5-534:2008.
Najpomembnejša tehnična sprememba se nanaša na izbiro zahtev za napetostni zaščitni nivo.

Upoštevati je treba, da so nekateri elementi tega dokumenta lahko predmet patentnih pravic. CENELEC
[in/ali CEN] ni odgovoren za identifikacijo katerekoli ali vseh teh pravic.

Točke, podtočke, opombe, preglednice, številke in dodatki, ki so dodani tistim v IEC 60364-5-
53:2001/A2:2015, imajo predznak "Z".

SIST HD 60364-5-534 : 2016
Razglasitvena objava
Besedilo mednarodnega standarda IEC 60364-5-53:2001/A2:2015 je odobril CENELEC kot
harmonizacijski dokument z dogovorjenimi splošnimi spremembami.

SPLOŠNE SPREMEMBE
530.2 Zveze s standardi
Besedilo v 530.2 se zamenja z naslednjim:

Za uporabo tega standarda so nujno potrebni, v celoti ali delno, naslednji referenčni dokumenti. Pri
datiranih sklicevanjih velja samo navedena izdaja. Pri nedatiranih sklicevanjih se uporablja zadnja izdaja
navedenega dokumenta (vključno z dopolnili).
EN 60038 Standardne napetosti CENELEC (IEC 60038)
HD 60364-4-41:2007 + corr. jul. 2007 Nizkonapetostne električne inštalacije – 4-41. del: Zaščitni ukrepi
– Zaščita pred električnim udarom om (IEC 60364-4-41:2005, mod.)
HD 60364-4-43:2010 Nizkonapetostne električne inštalacije – 4-43. del: Zaščitni ukrepi –
Zaščita pred nadtoki (IEC 60364-4-43:2008, mod. + corr. okt. 2008)
HD 60364-4-443:2016 Nizkonapetostne električne inštalacije – 4-44. del: Zaščitni ukrepi –
Zaščita pred napetostnimi in elektromagnetnimi motnjami – 443. točka:
Zaščita pred atmosferskimi in stikalnimi prenapetostmi (IEC 60364-4-
44:2007/A1:2015, mod.)
HD 60364-5-54 Nizkonapetostne električne inštalacije – 5-54. del: Izbira in namestitev
električne opreme – Ozemljitve in zaščitni vodniki (IEC 60364-5-54)
EN 60664-1:2007 Uskladitev izolacije za opremo v okviru nizkonapetostnih sistemov – 1.
del: Načela, zahteve in preskusi (IEC 60664-1:2007)
EN 61643-11:2012 Nizkonapetostne naprave za zaščito pred prenapetostnimi udari – 11.
del: Naprave za zaščito pred prenapetostnimi udari za nizkonapetostne
napajalne sisteme – Zahteve in preskus (IEC 61643-11:2011, mod.)
CLC/TS 61643-12 Nizkonapetostne naprave za zaščito pred prenapetostnimi udari – 12.
del: Naprave za zaščito pred prenapetostnimi udari za nizkonapetostne
napajalne sisteme – Izbira in načela za uporabo (IEC 61643-12)
EN 62305-1 Zaščita pred delovanjem strele – 1. del: Splošna načela (IEC 62305-1)
EN 62305-2 Zaščita pred delovanjem strele – 2. del: Vodenje rizika (IEC 62305-2)
EN 62305-4 Zaščita pred delovanjem strele – 4. del: Električni in elektronski sistemi
v zgradbah (IEC 62305-4)
IEC/TR 60664-2-1:2011 Koordinacija izolacije za opremo v nizkonapetostnih sistemih – 2-1. del:
Navodilo za uporabo – Pojasnitev uporabe v skupini IEC 60664, primeri
dimenzioniranja in dielektrično preskušanje

SIST HD 60364-5-534 : 2016
530.3 Izrazi in definicije
Doda se točka 530.3 "Izrazi in definicije", kot sledi:

530.3 Izrazi in definicije
V tem dokumentu se uporabljajo naslednji izrazi in definicije:

530.3.101
sestav SPD (sestav prenapetostne zaščitne naprave)
en SPD ali niz SPD, v obeh primerih vključno z vsemi ločilniki SPD, ki jih zahteva proizvajalec SPD in
ki zagotavljajo zahtevano prenapetostno zaščito danega tipa ozemljitve omrežja

530.3.102
ločilnik SPD
ločilnik
naprava za izklop SPD ali dela SPD iz elektroenergetskega sistema

OPOMBA: Za to napravo za ločitev se ne zahteva, da ima izolacijsko sposobnost za zaščitne namene. Namenjena je
preprečitvi nastanka trajne okvare v sistemu in indikaciji odpovedi SPD. Ločilniki so lahko notranji (vgrajeni) ali
zunanji (na zahtevo proizvajalca). Imajo lahko več kot eno izklopno funkcijo, npr. nadtokovno in toplotno zaščitno
funkcijo. Te funkcije so lahko v ločenih enotah.

[VIR: IEC 61643-11:2011, 3.1.28]

530.3.103
način zaščite s prenapetostno zaščitno napravo (SPD)
predvidena pot toka med priključki, ki vključuje zaščitne komponente, npr. za medfazno zaščito, zaščito
faza proti zemlji, med fazo in nevtralnim vodnikom ter med nevtralnim vodnikom in zemljo

[VIR: IEC 61643-11:2011, 3.1.8]

530.3.104
naznačena vrednost toka po prekinitvi
Ifi
pričakovani kratkostični tok, ki ga SPD lahko prekine brez delovanja ločilnika

[VIR: IEC 61643-11:2011, 3.1.39]

530.3.105
naznačeni kratkostični tok
I
SCCR
največji pričakovani kratkostični tok iz elektroenergetskega sistema, za katerega je predviden SPD
skupaj z določenim ločilnikom
[VIR: IEC 61643-11:2011, 3.1.27]

530.3.106
napetostni zaščitni nivo
U
p
najvišja napetost, ki jo je mogoče pričakovati na sponkah SPD zaradi udarne preobremenitve z
napetostjo z določeno strmino in udarne preobremenitve z razelektritvenim tokom z določeno amplitudo
in valovno obliko
OPOMBA 1: Napetostni zaščitni nivo poda proizvajalec naprave in ga ne smejo presegati:

– izmerjena mejna napetost, določena za čelni preplaz (če je to primerno), in izmerjena mejna napetost,
določena iz merjenj preostale napetosti pri amplitudi, ki ustreza toku I oziroma I glede na preskusna
n imp
razreda II oziroma I,
SIST HD 60364-5-534 : 2016
– izmerjena mejna napetost pri napetosti odprtega tokokroga (U ) generatorja kombiniranih valov, določenega
OC
za kombinirani val za preskusni razred III.

OPOMBA 2: Podatki o soodvisnosti med tipi SPD in preskusnimi razredi v skladu s standardom za proizvod so navedeni v
dodatku C.
[VIR: IEC 61643-11:2011, 3.1.14, spremenjen – spremenjena je opomba 1 in dodana opomba 2]

530.3.107
naznačena udarna napetost
UW
vrednost udarne vzdržne napetosti, ki jo proizvajalec določi napravi ali delu naprave in ki podaja
določeno vzdržno zmogljivost njene izolacije proti prehodnim prenapetostim

[VIR: IEC 60664-1:2007, 3.9.2, spremenjen – dodana je okrajšava U ]
W
530.3.108
najvišja stalna obratovalna napetost
UC
najvišja efektivna napetost, ki je lahko trajno priključena v načinu zaščite s SPD

OPOMBA: Vrednost U , ki jo obravnava ta standard, lahko preseže 1 000 V.
C
[VIR: IEC 61643-11:2011, 3.1.11]

530.3.109
nazivni razelektritveni tok za preskus razreda II
In
temenska vrednost toka skozi SPD, ki ima valovno obliko 8/20

OPOMBA: Informacije o soodvisnosti med tipi SPD in preskusnimi razredi v skladu s standardom za proizvod so navedene
v dodatku C.
[VIR: IEC 61643-11:2011, 3.1.9, spremenjen – dodana je opomba]

530.3.110
udarni razelektritveni tok za preskus razreda I
I
imp
temenska vrednost toka skozi SPD z določeno vrednostjo prenesenega naboja Q in določeno vrednostjo
energije W/R v določenem času
OPOMBA: Informacije o soodvisnosti med SPD in preskusnimi razredi v skladu s standardom za proizvod so navedene v
dodatku C.
[VIR: IEC 61643-11:2011, 3.1.10, spremenjen – dodana je opomba]

530.3.111
napetost na odprtih sponkah
U
OC
napetost na odprtih sponkah generatorja kombiniranih valov v točki, kjer je nanj priključen preskušanec

[VIR: IEC 61643-11:2011, 3.1.23]

530.3.112
dvoportna prenapetostna zaščitna naprava (SPD)
SPD, ki ima med ločenima vhodnim in izhodnim priključkom vezano posebno zaporedno impedanco

[VIR: IEC 61643-11:2011, 3.1.3]

SIST HD 60364-5-534 : 2016
534 Naprave za zaščito pred prehodnimi prenapetostmi

534.1 Splošno
Zamenjata se prva dva odstavka v 534.1, kot sledi:

Točka vsebuje določila za uporabo napetostne meje, da se doseže koordinacija izolacije v primerih,
opisanih v HD 60364-4-44, EN 60664-1, EN 62305-1, EN 62305-4 in CLC/TS 61643-12.

Ta točka se osredotoča predvsem na zahteve za izbiro in namestitev SPD za zaščito pred prehodnimi
prenapetostmi, če se to zahteva v IEC 60364-4-44:2007, točka 443, skupini standardov EN 62305 ali
če je določeno drugače.
Zamenjajo se naslov točke 534.4.1 in odstavki pred OPOMBO 3, razen OPOMBE 1, kakor sledi

534.4.1 Lokacija in tip SPD
SPD mora biti nameščen čim bližje je mogoče začetku inštalacije. Za zaščito pred delovanjem strele in
stikalnimi prenapetostmi je treba uporabiti SPD tipa 2.

Če je zgradba opremljena z zunanjim sistemom zaščite pred delovanjem strele ali je zaščita pred učinki
neposrednega udara strele določena drugače, se uporabijo SPD tipa 1.

Kadar zgradba ni opremljena z zunanjim sistemom zaščite pred delovanjem strele in kadar je treba
upoštevati možnost neposrednega udara strele v nadzemne vode med zadnjim drogom in vhodom v
inštalacijo, se lahko izberejo SPD tipa 1 na začetku inštalacije ali blizu njega v skladu z dodatkom B.

Na podlagi standarda za proizvod se uporabijo naslednje oznake proizvodov:

– za tip 1 SPD: "tip 1" in/ali "T1" (T1 v okvirju),

– za tip 2 SPD: "tip 2" in/ali "T2" (T2 v okvirju),

– za tip 3 SPD: "tip 3" in/ali "T3" (T3 v okvirju).

OPOMBA 2: Informacije o soodvisnosti med tipi SPD in preskusnimi razredi v skladu s standardom za proizvod so podane v
dodatku C.
Za zadovoljivo zaščito inštalacije v skladu s 534.4.4.1 bodo morda potrebni dodatni SPD tipa 2 ali tipa
3, ki jih je treba namestiti za njimi v fiksni električni inštalaciji, npr. na podrejenih razdelilnikih ali na
vtičnicah. Ti SPD ne smejo biti uporabljeni brez SPD, nameščenih na začetku inštalacije, in morajo biti
usklajeni s SPD, vgrajenimi pred njimi (glej 534.4.4.5).

Če tip 1 SPD ne more zagotavljati zaščite v skladu s 534.4.4.2, mu je treba dodati usklajeni SPD tipa 2
ali tipa 3, da se zagotovi zahtevani napetostni zaščitni nivo.

Tik ob občutljivi opremi bodo morda potrebni SPD tipa 2 ali tipa 3, da bo oprema zadovoljivo zaščitena
v skladu s 534.4.4.2, ki pa morajo biti usklajeni z višje umeščenimi SPD.

Zamenjata se slika 534.1 in njen naslov, kot sledi:

SIST HD 60364-5-534 : 2016
Na začetku inštalacije ali blizu njega,
npr. glavni razdelilnik
SPD tipa 1 in/ali SPD tipa 2 SPD tipa 2 ali SPD tipa 3 SPD tipa 2 ali SPD tip 3

Slika 534.1: Primer namestitve prenapetostnih zaščitnih naprav SPD tipa 1, tipa 2 in tipa 3

534.4.4.2 Izbira napetostnega zaščitnega nivoja (Up) kot funkcije naznačenega napetostnega
udara opreme (UW)
Zamenja se uvodni odstavek za štiri alineje, kot sledi:

Tega priporočila ni treba upoštevati, če ne pride do nobenega od naštetih primerov:

Zamenja se preglednica 534.1, kot sledi:

Preglednica 534.1: Zahtevana naznačena udarna napetost opreme (UW)

Nazivna napetost Nazivna napetost Napetostni vodnik Zahtevana naznačena udarna
a a b
napajalnega sistema napajalnega sistema proti nevtralni točki iz napetost (UW) opreme
nazivnih izmeničnih
Trifazni sistemi Enofazni sistemi
Prenapetostna Prenapetostna
ali enosmernih
kategorija II kategorija I
napetosti do vključno
(oprema z (oprema z
normalno znižano
naznačeno naznačeno
udarno udarno
napetostjo napetostjo
V V kV kV
50 0,5 0,33
100 0,8 0,5
120/240 150 1,5 0,8
230/400 300 2,5 1,5
277/480
400/690 600 4 2,5
1 000 1 000 6 4
c c
1 500 enosmerno 8 6
a
V skladu z EN 60038.
b
Naznačena udarna napetost velja za napetost med vodnikom pod napetostjo in PE.
c
Priporočene vrednosti na podlagi IEC/TR 60664–2-1:2011, dodatek D.
SIST HD 60364-5-534 : 2016
Zamenja se odstavek po preglednici 534.1, kot sledi:

Zaradi izogibanja nepravilnemu delovanju opreme bodo morda potrebni dodatni SPD med vodniki pod
napetostjo. Na podlagi zahtev za odpornost in razpoložljivost opreme je treba oceniti ustrezni napetostni
zaščitni nivo (glej IEC 61643-12).

534.4.4.4 Izbira SPD glede na nazivni razelektritveni tok (In) in udarni razelektritveni tok (Iimp)

Zamenjata se naslov točke 534.4.4.4.1 in njen prvi odstavek, kot sledi:

534.4.4.4.1 SPD tipa 2
Kjer je zahtevano, da so SPD tipa 2 na začetku inštalacije ali blizu njega, mora biti njihov nazivni
razelektritveni tok najmanj enak toku, navedenemu v preglednici 534.3.

Zamenjajo se naslov točke 534.4.4.4.2 in njena prva dva odstavka, kakor sledi:

534.4.4.4.2 SPD tipa 1
Kjer je zahtevano, da so SPD tipa 1 na začetku inštalacije ali blizu njega, velja eden od naslednjih
primerov:
a) če ni bila izvedena analiza tveganja po IEC 62305-2, udarni razelektritveni tok (I ) ne sme biti
imp
manjši od toka, navedenega v preglednici 534.4,

Zamenja se alineja b), kakor sledi:

b) če je bila izvedena analiza tveganja po IEC 62305-2, se vrednost udarnega razelektritvenega toka
(I ) določi v skladu s skupino standardov IEC 62305.
imp
534.4.4.5 Usklajevanje dveh ali več SPD

Zamenja se odstavek v 534.4.5, kakor sledi:

Zagotoviti je treba usklajenost SPD v inštalaciji. Navodila proizvajalca SPD, kako doseči usklajenost
med SPD, morajo upoštevati referenčni dokument CLC/TS 61643-12.

534.4.4.6 Izbira SPD glede na naznačeni kratkostični tok I
SCCR
Zamenja se drugi odstavek v 534.4.4.6, kakor sledi:

Ta zahteva ne velja za SPD, priključene med nevtralnim in PE-vodnikom v omrežjih TN ali TT, za katere
je to že zajeto v standardu za proizvod IEC 61643-11.

534.4.4.7 Izbira SPD glede na naznačeno vrednost toka po prekinitvi

Zamenja se drugi odstavek v 534.4.4.7, kakor sledi:

Ta zahteva ne velja za SPD, priključene med nevtralnim in PE-vodnikom v omrežjih TN ali TT, za katere
je to že zajeto v standardu za proizvod IEC 61643-11.

534.4.5.3 Selektivnost med nadtokovnimi zaščitnimi napravami

Zamenja se prvi odstavek v 534.4.5.3, kakor sledi:

Kjer je to zahtevano, je treba skladno z inštalacijskimi pogoji na mestu inštalacije SPD in informacijami,
ki jih zagotovi proizvajalec, upoštevati selektivnost med nadtokovnimi zaščitnimi napravami (glej IEC
60364-5-53:2014, točka 536).
SIST HD 60364-5-534 : 2016
534.4.6 Okvarna zaščita
Zamenja se prvi odstavek v 534.4.6, kakor sledi:

Okvarna zaščita, kot je opredeljena v IEC 60464-4-41, mora v ščitenih inštalacijah ostati učinkovita tudi
v primeru odpovedi SPD.
Zamenja se alineja b), kakor sledi:

b) namestitev SPD pred glavnim RCD. Zaradi možnosti odpovedi SPD, povezanega med nevtralnim
in PE-vodnikom, morajo biti izpolnjeni pogoji iz HD 60364-4-41:2007, točka 411.4.1, in SPD morajo
biti nameščeni v skladu s priključnim tipom CT2.

534.4.7 Namestitev SPD v povezavi z RCD

Zamenjata se OPOMBA 1 in zadnji odstavek v 534.4.7, kakor sledi:

OPOMBA 1: RCD tipa S v skladu z IEC 61008-1 in IEC 61009-1 izpolnjujejo to zahtevo.

Namestitev SPD tipa 1 nižje od namestitve RCD ni priporočljiva.

534.4.10 Priključni vodniki SPD

Zamenjata se dve alineji za prvim odstavkom v 534.4.10, kakor sledi:

‒ 6 mm iz bakra ali enakovrednega materiala, za SPD tipa 2 na začetku inštalacije ali blizu njega,

‒ 16 mm iz bakra ali enakovrednega materiala, za SPD tipa 1 na začetku inštalacije ali blizu njega.

Zamenjata se zadnji dve alineji, kakor sledi:

‒ 2,5 mm iz bakra ali enakovrednega materiala za SPD tipa 2 na začetku inštalacije ali blizu njega,

‒ 6 mm iz bakra ali enakovrednega materiala, za SPD tipa 1 na začetku inštalacije ali blizu njega.

SIST HD 60364-5-534 : 2016
Dodatek B
(informativni)
Inštalacije, ki jih napajajo nadzemni vodi

Zamenjata se prva dva odstavka, kakor sledi:

Kjer je zahtevana prenapetostna zaščita v skladu s HD 60364-4-44:2016, točka 443, in kjer nadzemni
vodi vstopajo v stavbo ter kjer je treba upoštevati možnost neposrednega udara strele v drog nadzemnih
vodov v bližini stavbe, je treba SPD na začetku inštalacije izbrati v skladu s preglednico B.1.

Več informacij je na voljo v skupini standardov IEC 62305.

SIST HD 60364-5-534 : 2016
Zamenja se dodatek C z naslednjim novim dodatkom C:

Dodatek C
(informativni)
Soodvisnost med tipi SPD in preskusnimi razredi v skladu s standardom za
proizvod EN 61643-11
Preglednica C.1: SPD tipa 1, tipa 2 in tipa 3 ter ustrezni preskusni razredi I, II in III

Tip naprave SPD Preskusni razred Referenčni
parameter
Tip 1 Preskusni razred I I
imp
Tip 2 Preskusni razred II I
n
Tip 3 Preskusni razred III Uoc

SIST HD 60364-5-534 : 2016
Dodata se dodatka ZA in ZB, kakor sledi:

Dodatek ZA
(informativni)
Posebni nacionalni pogoji
Posebni nacionalni pogoji: nacionalne karakteristike ali prakse, ki jih ni mogoče spremeniti niti po
dolgem obdobju, npr. podnebne razmere, pogoji za električne ozemljitve.
OPOMBA: Če to vpliva na harmonizacijo, je to del evropskega standarda.
Za države, na katere se relevantni posebni nacionalni pogoji nanašajo, so te določbe normativne, za
druge države pa so informativne.

Točka Posebni nacionalni pogoj
534.4.1 Francija
Naslednja vsebina:
Kadar zgradba ni opremljena z zunanjim sistemom zaščite pred delovanjem strele in
kadar je treba upoštevati možnost neposrednega udara strele v nadzemne vode med
zadnjim drogom in vhodom v inštalacijo, se lahko izberejo SPD tipa 1 na začetku
inštalacije ali blizu njega v skladu z dodatkom B.

v Franciji ne velja.
534.4.1 Nemčija
V Nemčiji morajo biti tam, kjer je inštalacija zgradb izvedena z nadzemnimi vodi, SPD
tipa 1 v skladu z dodatkom B.
Nemčija
534.4.3
V Nemčiji je edina zahteva, ki jo je treba upoštevati, omejitev dolžine do največ 0,5 m.
Norveška
534.4.4.2
Na Norveškem mora biti tam, kjer je inštalacija galvansko povezana na IT-javno
omrežje, najnižja zahtevana U za SPD na začetku inštalacije najmanj 350 V.
c
534.4.4.4.1 Nemčija
Dodata se naslednje besedilo in dodatna preglednica:
Nazivni razelektritveni tok SPD tipa 2, vgrajenih na začetku inštalacij ali blizu njega, s
povečanim varnostnim nivojem, ne sme biti manjši od toka, navedenega v spodnji
preglednici 534.3.
SIST HD 60364-5-534 : 2016
Točka Posebni nacionalni pogoj
Preglednica 534.3: Nazivni razelektritveni tok (I ) v kA, odvisen od napajalnega
n
sistema in vrste povezave za inštalacije s povečanim varnostnim nivojem
Povezava Napajalni sistem
Enofazni Trifazni
Povezava Povezava Povezava Povezava
tipa 1 tipa 2 tipa 1 tipa 2
L – N 10 10
L – PE 10 10
N – PE 10 20 10 40
534.4.4.4.2 Nemčija
V Nemčiji morajo biti tam, kjer je napajanje inštalacije zgradbe izvedeno z nadzemnimi
vodi, SPD tipa 1 v skladu z dodatkom B.
534.4.4.5 Norveška
Na Norveškem mora imeti tam, kjer je inštalacija galvansko povezana na javno IT-
omrežje in kjer je drugi SPD nameščen za SPD, ki je v glavnem razdelilniku, drugi
SPD najvišjo stalno obratovalno napetost U najmanj 440 V med linijskimi vodniki in
c
PE, in najmanj 275 V med linijskimi vodniki.

534.4.6 Nemčija
Zaradi izogibanja nepotrebnim odklopom ali lepljenju/mehanskim poškodbam
kontaktov RCD se je treba izogibati pretoku velikih ali delnih udarnih tokov strele. Zato
naj bodo SPD preskusnega razreda I ali II nameščeni na linijski strani RCD. Če je
mogoče pričakovati prenapetostni udar na bremenski strani RCD, npr. zaradi zunaj
vgrajene opreme, ki ni zaščitena z LPS (sistemom zaščite pred delovanjem strele), naj
se na bremenski strani RCD namesti SPD preskusnega razreda I ali II.
534.4.6 Norveška
Na Norveškem je treba tam, kjer je inštalacija galvansko povezana z javnim IT-
omrežjem ali TT-distribucijskim omrežjem brez zagotovljenega ločenega vodnika PE
(npr. napajanje inštalacije iz nadzemnih vodov), zaščito pred požarom, nastalim zaradi
odpovedi SPD, zagotoviti z:
– umestitvijo SPD v ločena ohišja iz negorljivih materialov ali
– zaščito SPD s časovno zakasnjenim RCD (tip S ali podobno) s preostalim
naznačenim tokom, ki ne presega 300 mA, ali
z uporabo SPD, zasnovanega tako, da kar najbolj zmanjša tveganje poškodbe in
požara zaradi zemeljskega stika v visokonapetostnem distribucijskem omrežju.
534.4.7 Nemčija
Zagotovi naj se, da tokovi strele ali veliki udarni toki ne bodo tekli skozi RCD. Zato
SPD preskusnega razreda I ni dopustno nameščati za RCD, razen če je mogoče
pričakovati delne tokove strele tudi na bremenski strani RCD.

SIST HD 60364-5-534 : 2016
Točka Posebni nacionalni pogoj
Namestitev SPD preskusnega razreda II za RCD je dopustna le, če je pred RCD že
nameščen SPD preskusnega razreda II ali če se pričakujejo udarni toki na bremenski
strani RCD.
Pri udarnih tokih, večjih od 3 kA 8/20, se RCD lahko sproži in povzroči prekinitev
napajanja.
Dodatek A Nemčija
V Nemčiji so zahtevani ozemljitveni priključki 5a in 5b za SPD, ki so nameščeni na
začetku inštalacije.
Dodatek B Francija
Dodatek B ne velja v Franciji
Dodatek B Nemčija
Dodatek B je v Nemčiji normativen.

SIST HD 60364-5-534 : 2016
Dodatek ZB
(informativni)
A-deviacije
A-deviacija: nacionalno odstopanje zaradi predpisov, katerih spremembe v času sprejema tega
standarda niso bile v pristojnosti nacionalnega člana CEN-CENELEC.

Na ta harmonizacijski dokument se ne sklicuje nobena direktiva EU.

V ustreznih državah članicah CEN-CENELEC te A-deviacije veljajo namesto določil harmonizacijskega
dokumenta, dokler ne bodo umaknjene.

Točka Deviacija
534.4.6 Avstrija
Elektrotehniški odlok 2002 – Zvezni uradni list, Del II, št. 222/2002,
534.4.7
spremenjen z
Elektrotehniškim odlokom 2002/A1 – Zvezni uradni list, II. del, št. 33/2006,
spremenjen z
Elektrotehniškim odlokom 2002/A2 – Zvezni uradni list, II. del, št. 223/2010:

V Avstriji naj ne bo sestav SPD na začetku inštalacije ali blizu njega nameščen za

katerimkoli RCD.
Elektrotehniški odlok 2002 – Zvezni uradni list, Del II, št. 222/2002,
534.4.11AT
spremenjen z
Elektrotehniškim odlokom 2002/A1 – Zvezni uradni list, II. del, št. 33/2006,
spremenjen z
Elektrotehniškim odlokom 2002/A2 – Zvezni uradni list, II. del, št. 223/2010:
Dodatek:
534.4.11AT Merjenje upornosti izolacije
Če SPD, nameščeni na razdelilniku, lahko pomembno vplivajo na meritve izolacijske
upornosti inštalacije, jih je treba z nalepkami jasno označiti, npr.
SPD morajo biti med meritvami izključeni!

SPD, ki niso nameščeni na razdelilniku in so priključeni na vodnik PE, morajo vzdržati
meritev izolacijske upornosti brez pomembnega vpliva na merilne rezultate.

SIST HD 60364-5-534 : 2016
Zamenja se Literatura, kot sledi:

Literatura
EN 61008-1, Odklopniki na preostali (residualni) tok brez vgrajene nadtokovne zaščite za gospodinjsko
in podobno rabo (RCCB's) – 1. del: Splošna pravila (IEC 61008-1)

EN 61009-1, Odklopniki na preostali (residualni) tok z vgrajeno nadtokovno zaščito za gospodinjsko in
podobno rabo (RCBO's) - 1. del: Splošna pravila (IEC 61009-1)

SIST HD 60364-5-534 : 2016
Nizkonapetostne električne inštalacije – 5-53. del: Izbira in namestitev električne
opreme – Ločevanje, stikanje in krmiljenje

Predgovor k mednarodnemu dopolnilu

To dopolnilo je pripravil tehnični odbor IEC/TC 64 Električna izolacija in zaščita pred električnim udarom.

Besedilo tega dopolnila temelji na naslednjih dokumentih:

FDIS Poročilo o glasovanju
64/2031/FDIS 64/2072/RVD
Celotna informacija o glasovanju za potrditev tega dopolnila je na voljo v poročilu o glasovanju,
navedenem v preglednici zgoraj.

Odbor je odločil, da ostaneta vsebina tega dopolnila in osnovna publikacija nespremenjeni do datuma
stabilnosti, navedenega na spletni strani IEC na naslovu "http://webstore.iec.ch" med podatki, ki se
nanašajo na določeno publikacijo. Po tem datumu bo publikacija

– ponovno potrjena,
– razveljavljena,
– zamenjana z novo izdajo ali
– dopolnjena
POMEMBNO: Logotip "v barvah" na platnicah te publikacije opozarja, da vsebuje barve, ki so potrebne
za pravilno razumevanje njene vsebine. Uporabniki naj zato tiskajo ta dokument z barvnim tiskalnikom.
.
Predgovor
Zamenja se obstoječe besedilo, vključno z besedilom Dopolnila 1:2002, ki se glasi:

"Osnutek te publikacije je kolikor je mogoče v skladu z Direktivami ISO/IEC, 3. del"

z naslednjim novim stavkom:
Osnutek te publikacije je v skladu z Direktivami ISO/IEC, 2. del.

Tako iz IEC 60364-5-53:2001 kot iz Dopolnila 1:2002 se izbriše stavek, ki se glasi:

"Dodatki A, B, C in D so samo informativni."

530.2 Zveze s standardi
Dodajo se naslednja nova sklicevanja:

IEC 60038 IEC standardne napetosti

IEC 60364-5-54 Nizkonapetostne električne inštalacije – 5-54. del: Izbira in namestitev
električne opreme – Ozemljitve in zaščitni vodniki

SIST HD 60364-5-534 : 2016
IEC 61643-11:2011 Nizkonapetostne naprave za zaščito pred prenapetostnimi udari – 11. del:
Naprave za zaščito pred prenapetostnimi udari za nizkonapetostne napajalne
sisteme – Zahteve in preskus
IEC 62305 (vsi deli) Zaščita pred delovanjem strele

IEC 62305-1 Zaščita pred delovanjem strele – 1. del: Splošna načela

IEC 62305-2 Zaščita pred delovanjem strele – 2. del: Vodenje rizika

IEC 62305-4 Zaščita pred delovanjem strele – 4. del: Električni in elektronski sistemi v
zgradbah
Zamenja se sedanje sklicevanje na "IEC 61643-12" z naslednjim:

IEC 61643-12:2008 Nizkonapetostne naprave za zaščito pred prenapetostnimi udari – 12. del:
Naprave za zaščito pred prenapetostnimi udari za nizkonapetostne napajalne
sisteme – Izbira in načela za uporabo

Zamenja se sedanji datum "2001" za IEC 60364-4-41 z "2005".

Zamenja se sedanji datum "2001" za IEC 60364-4-43 z "2008".

Zamenja se sedanji datum "2001" za IEC 60364-4-44 z "2007".

Zamenja se sedanji datum "1996" za IEC 61008-1 z "2010".

534 Naprave za zaščito pred elektromagnetnimi in napetostnimi motnjami

Sedanji naslov in besedilo točke 534, vključno z besedilom Dopolnila 1:2002, se zamenjata z naslednjim
naslovom in besedilom:
534 Naprave za zaščito pred prehodnimi prenapetostmi

534.1 Splošno
Točka vsebuje določila za uporabo napetostne meje, da se doseže koordinacija izolacije v primerih,
opisanih v IEC 60364-4-44, IEC 60664-1, IEC 62305-1, IEC 62305-4 in IEC 61643-12.

Ta točka se osredotoča predvsem na zahteve za izbiro in namestitev SPD za zaščito pred prehodnimi
prenapetostmi, če se to zahteva v IEC 60364-4-44:2007, točka 443, skupini standardov EN 62305 ali
če je določeno drugače.
Ta točka ne upošteva:
– prenapetostnih zaščitnih komponent, ki so lahko vgrajene v aparate, priključene na inštalacijo,

– prenosnih SPD.
OPOMBA: Nadaljnje informacije so na voljo v IEC 61643-12.

Ta točka velja za tokokroge z izmenično napetostjo. Kolikor je le uporabno, se lahko zahteve iz te točke
uporabijo tudi za tokokroge z enosmerno napetostjo.

534.2  Razveljavljeno
SIST HD 60364-5-534 : 2016
534.3 Izrazi in definicije
534.3.1
sestav prenapetostne zaščitne naprave (SPD)
en SPD ali niz SPD, v obeh primerih vključno z vsemi ločilniki SPD, ki jih zahteva proizvajalec SPD in
ki zagotavljajo zahtevano prenapetostno zaščito danega tipa ozemljitve omrežja

534.3.2
ločilnik SPD
ločilnik
naprava za izklop SPD ali delni izklop SPD iz elektroenergetskega sistema

OPOMBA 1: Za to napravo za ločitev se ne zahteva, da ima izolacijsko sposobnost za zaščitne namene. Namenjena je
preprečitvi nastanka trajne okvare v sistemu in indikaciji odpovedi SPD. Ločilniki so lahko notranji (vgrajeni) ali
zunanji (na zahtevo proizvajalca). Imajo lahko več kot eno izklopno funkcijo, npr. nadtokovno in toplotno zaščitno
funkcijo. Te funkcije so lahko v ločenih enotah.

[VIR: IEC 61643-11:2011, 3.1.28]

534.3.3
način zaščite s prenapetostno zaščitno napravo (SPD)
predvidena pot toka med priključki, ki vključuje zaščitne komponente, npr. za medfazno zaščito, zaščito
faza proti zemlji, med fazo in nevtralnim vodnikom ter med nevtralnim vodnikom in zemljo

[VIR: IEC 61643-11:2011, 3.1.8]

534.3.4
naznačena vrednost toka po prekinitvi
I
fi
pričakovani kratkostični tok, ki ga SPD lahko prekine brez delovanja ločilnika

[VIR: IEC 61643-11:2011, 3.1.39]

534.3.5
naznačeni kratkostični tok
I
SCCR
največji pričakovani kratkostični tok iz elektroenergetskega sistema, za katerega je predviden SPD
skupaj z določenim ločilnikom
[VIR: IEC 61643-11:2011, 3.1.27]

534.3.6
napetostni zaščitni nivo
U
p
najvišja napetost, ki jo je mogoče pričakovati na sponkah SPD zaradi udarne preobremenitve z
napetostjo z določeno strmino in udarne preobremenitve z razelektritvenim tokom z določeno amplitudo
in valovno obliko
OPOMBA 1: Napetostni zaščitni nivo poda proizvajalec naprave in ga ne smejo presegati:

– izmerjena mejna napetost, določena za čelni preplaz (če je to primerno), in izmerjena mejna napetost,
določena iz merjenj preostale napetosti pri amplitudi, ki ustreza toku I oziroma I glede na preskusna
n imp
razreda II oziroma I;
– izmerjena mejna napetost pri napetosti odprtega tokokroga (U ) generatorja kombiniranih valov, določenega
OC
za kombinirani val za preskusni razred III.

[VIR: IEC 61643-11:2011, 3.1.14]

SIST HD 60364-5-534 : 2016
534.3.7
naznačena udarna napetost
U
W
vrednost udarne vzdržne napetosti, ki jo proizvajalec določi napravi ali delu naprave in ki podaja
določeno vzdržno zmogljivost njene izolacije proti prehodnim prenapetostim

[VIR: IEC 60664-1:2007, 3.9.2, spremenjen]

534.3.8
najvišja stalna obratovalna napetost
U
C
najvišja efektivna vrednost napetosti, ki je lahko trajno priključena v načinu zaščite s SPD

OPOMBA 1: Vrednost U , ki jo obravnava ta standard, lahko preseže 1 000 V.
C
[VIR: IEC 61643-11:2011, 3.1.11]

534.3.9
nazivni razelektritveni tok za preskus razreda II
I
n
temenska vrednost toka skozi SPD, ki ima valovno obliko 8/20

[VIR: IEC 61643-11:2011, 3.1.9]

534.3.10
udarni razelektritven tok za preskus razreda I
I
imp
temenska vrednost toka skozi SPD z določeno vrednostjo prenesenega naboja Q in določeno vrednostjo
energije W/R v določenem času
[VIR: IEC 61643-11:2011, 3.1.10]

534.3.11
dvoportna prenapetostna zaščitna naprava (SPD)
SPD, ki ima med ločenima vhodnim in izhodnim priključkom vezano posebno zaporedno impedanco

[VIR: IEC 61643-11:2011, 3.1.3]

534.4 Izbira in namestitev SPD

534.4.1 Namestitev SPD in preskusni razred SPD

SPD je treba namestiti čim bližje je mogoče začetku inštalacije. Za zaščito pred učinki delovanja strele
in stikalnimi prenapetostmi je treba uporabiti SPD preskusnega razreda II.

Če je zgradba opremljena z zunanjim sistemom zaščite pred delovanjem strele ali če je zaščita pred
učinki neposrednega udara strele določena drugače, je treba uporabiti SPD preskusnega razreda I.

Kjer zgradba ni opremljena z zunanjim sistemom zaščite pred delovanjem strele in kjer je treba
upoštevati možnost neposrednega udara strele v nadzemne vode med zadnjim drogom in vhodom v
inštalacijo, se lahko izberejo SPD tipa 1 na začetku inštalacije ali blizu njega v skladu z dodatkom B.

OPOMBA 1: Začetek inštalacije je lahko mesto vstopa napajanja v stavbo ali pa v glavni razdelilnik.

OPOMBA 2: V skladu s standardom za proizvod morajo biti oznake proizvoda naslednje:

– za preskusni razred I: preskusni razred I in/ali T1  (T1 v okvirju)

– za preskusni razred II: preskusni razred II in/ali T2 (T2 v okvirju)

– za preskusni razred III: preskusni razred III in/ali T3 (T3 v okvirju)
SIST HD 60364-5-534 : 2016
Za zadovoljivo zaščito inštalacije v skladu s 534.4.4.2 bodo morda potrebni dodatni SPD preskusnega
razreda II ali preskusnega razreda III, ki morajo biti nameščeni v podrazdelilnikih ali v vtičnicah. Ti SPD
se ne smejo uporabljati brez SPD, nameščenih na začetku inštalacije, in morajo biti usklajeni s SPD,
vgrajenimi pred njimi (glej 534.4.4.5).

Če SPD preskusnega razreda I ne more zagotoviti zaščite skladno s 534.4.4.2, je treba dodati usklajeni
SPD preskusnega razreda II ali preskusnega razreda III, da se zagotovi zahtevani napetostni zaščitni
nivo.
Da bo oprema zadovoljivo zaščitena, bodo morda potrebni dodatni SPD preskusnega razreda II ali
preskusnega razreda III tik ob občutljivi opremi v skladu s preglednico 534.1, ki pa morajo biti usklajeni
z višje umeščenimi SPD.
OPOMBA 3: Takšni dodatni SPD so lahko del inštalacije, lahko pa so tudi prenosni.

Dodatni SPD bodo mogoče potrebni za zagotovitev zaščite pred prehodno prenapetostjo zaradi groženj,
ki prihajajo iz drugih virov, kot so npr.:

– stikalne prenapetosti, ki jih povzročajo naprave, ki so del inštalacije,

– prenapetosti na drugih dohodnih napeljavah, kot so telefonski vodi, internetne povezave,

– prenapetosti na drugih napeljavah, ki napajajo druge zgradbe, kot so pomožne zgradbe, zunanje
inštalacije/razsvetljava, električno napajanje zunanjih senzorjev,

in v teh primerih naj se razmisli o namestitvi SPD čim bližje izvoru groženj. Več informacij je na voljo v
IEC 61643-12.
Na začetku inštalacije,
npr. glavni razdelilnik
SPD preskusnega razreda I SPD preskusnega razreda II ali SPD preskusnega razreda II ali
in/ali preskusnega razreda II preskusnega razreda III preskusnega razreda III

Slika 534.1: Primer namestitve SPD preskusnega razreda I, preskusnega razreda II in
preskusnega razreda III
SIST HD 60364-5-534 : 2016
Prisotnost SPD, nameščenih zunaj razdelilnika (npr. v vtičnicah), mora biti trajno označena (npr. z
nalepko) v tem razdelilniku.
534.4.2 Zahteve za zaščito pred prehodnimi prenapetostmi

Zaščita pred prehodnimi prenapetostmi se lahko zagotovi:

– med vodniki pod napetostjo in PE (zaščita v smeri skupne točke),

– med vodniki pod napetostjo (diferenčna zaščita).

OPOMBA 1: Povezava tipa CT1 zagotavlja primarno zaščito v smeri skupne točke. Če je potrebna tudi diferenčna zaščita, bo
to v večini primerov zahtevalo dodatne SPD med vodniki pod napetostjo.

OPOMBA 2: Povezava tipa CT2 zagotavlja kombinacijo istovrstne in diferenčne zaščite.

Zaščita med vodniki pod napetostjo in PE (vključno z nevtralnim vodnikom proti PE, če obstaja nevtralni
vodnik) je obvezna.
Za zaščito opreme je priporočljiva zaščita med vodniki pod napetostjo in nevtralnim vodnikom (če
obstaja nevtralni vodnik).
Zaščita med vodniki pod napetostjo (pri večfaznem sistemu) ni obvezna.

Nekatera oprema bo morda potrebovala obe vezavi, istovrstno zaščito (za udarno vzdržnost) in
diferenčno zaščito (za udarno odpornost).

OPOMBA 3: Elektronska oprema razreda I ali oprema razreda II s povezavo na FE zahtevata istovrstno in diferenčno zaščito,
da se zagotovi celotna zaščita pred prehodnimi prenapetostmi, ki nastanejo zaradi preklapljanj ali atmosferskih
udarov.
534.4.3 Vrste vezave
Vezava tipa CT1 (npr. konfiguracija 3+0 ali 4+0): sestav SPD, ki zagotavlja način zaščite med vsakim
vodnikom pod napetostjo (linijski in nevtralni vodniki, če so na voljo) in PE ali med vodnikom pod
napetostjo in PEN.
Na slikah 532.2 in 534.3 sta predstavljena dva primera vezave CT1 v trifaznem sistemu.

Tip vezave CT2 (npr. konfiguracija 3+1): sestav SPD, ki zagotavlja način zaščite med vsakim vodnikom
pod nape
...

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SIST HD 60364-5-534:2016は、低電圧電気設備の選定と設置に関する重要な標準であり、特に過渡的な過電圧からの保護装置に焦点を当てています。この文書は、IEC 60364-5-53の基準に基づき、絶縁、スイッチングおよび制御の一般的要件について説明しています。Clause 534は、設置された機器が過渡的な過電圧から保護されるように設計される際の要件を提供します。 この標準の強みは、過渡的な過電圧から保護するためのサージ防護デバイス(SPD)の選定および設置に関する具体的なガイドラインを示している点です。IEC 60364-4-44:2007のClause 443やEN 62305シリーズに照らして必要とされる要件に従うことで、絶縁の調整を得るための電圧制限の適用に関する細則が設けられています。これにより、電気設備が安全に運用されるための基盤が整備されます。 さらに、SIST HD 60364-5-534:2016は、交流電力回路に適用される要件を定義していますが、必要に応じて直流電力回路にも適用可能です。この柔軟性は、さまざまな習慣や技術的要件に適応するのに役立ち、現代の電気設備における重要な基準となっています。 総じて、この標準は、過渡的な過電圧からの保護デバイスの確保に関して、非常に重要かつ必要不可欠な指標を提供しており、エンジニアや技術者が実用的かつ安全な電気設計を行うために不可欠なリソースです。

The standard HD 60364-5-534:2016 presents a comprehensive framework for the protection against transient overvoltages, focusing primarily on low-voltage electrical installations. Its scope highlights the critical guidelines for the selection and installation of surge protective devices (SPDs), ensuring compliance with essential safety requirements delineated in related standards such as IEC 60364-4-44 and EN 62305 series. One of the notable strengths of this standard is its clear emphasis on insulation coordination, which is paramount for preventing damage and ensuring operational reliability in electrical systems. By defining specific criteria for the installation and performance of SPDs, Clause 534 effectively addresses the vulnerabilities that can arise from transient overvoltages, thus contributing significantly to enhanced safety protocols within electrical installations. The standard's relevance is underscored by its application to alternating current (a.c.) power circuits while also offering provisions adaptable to direct current (d.c.) systems, thereby broadening its applicability across various electrical setups. Furthermore, despite excluding surge protective components incorporated in appliances and portable SPDs, the standard encourages adherence to supplementary resources like CLC/TS 61643-12 for further guidance, thereby ensuring a holistic approach to transient overvoltage protection. In summary, HD 60364-5-534:2016 stands as a vital reference for practitioners in the electrical installation sector, ensuring that protective measures against transient overvoltages are both well-defined and effectively implemented. Its meticulous criteria and robust framework play a crucial role in promoting safety and efficiency in low-voltage electrical systems.

SIST HD 60364-5-534:2016 표준은 저전압 전기 설치를 위한 중요한 기준으로, 전기 장비의 선택 및 설치에 대한 명확한 지침을 제공합니다. 이 표준은 특히 전압 제한의 적용과 관련된 요구 사항에 중점을 두어, 절연 조정(insulation coordination)을 확보하는 데 필요한 요소들을 상세히 다룹니다. 이는 HD 60364-4-44 및 EN 62305 시리즈와 연동되어, 사용자가 안전하고 신뢰할 수 있는 전기 설치를 구현할 수 있도록 돕습니다. Clause 534의 주요 강점 중 하나는 일시적인 과전압(transient overvoltages)으로부터 보호하기 위한 서지 보호 장치(SPD)의 선택과 설치 요건을 명확히 제시하고 있다는 점입니다. 이는 IEC 60364-4-44:2007, Clause 443 및 EN 62305 시리즈에서 요구하는 기준과 일치하며, 전기 설치의 안전성을 한층 높여줍니다. 또한, 이 표준은 교류(A.C.) 전력 회로에 적용되며, 가능한 경우 직류(D.C.) 전력 회로에도 이 조항을 따를 수 있도록 하고 있어 광범위한 범용성을 제공합니다. 하지만, 설치에 연결된 기기 내에 통합된 서지 보호 부품이나 휴대용 SPD 등은 고려하지 않기 때문에, 이러한 부분에 대한 추가 정보는 CLC/TS 61643-12에서 찾아야 합니다. 결론적으로, SIST HD 60364-5-534:2016 표준은 전기 설비의 안전성과 효율성을 보장하기 위한 필수적인 문서로, 절연 및 전압 조정 요구 사항을 충족시키는 데 필수적인 지침을 제공합니다. 이는 전기 설비의 설계 및 설치 시 신뢰성과 안전성을 도모하는 데 매우 중요합니다.