EN 60728-11:2010

Cable networks for television signals, sound signals and interactive services - Part 11: Safety

IEC 60728-11:2010(E) deals with the safety requirements applicable to fixed sited systems and equipment. As far as applicable, it is also valid for mobile and temporarily installed systems, for example, caravans. Additional requirements may be applied. It is intended to provide specifically for the safety of the system, personnel working on it, subscribers and subscriber equipment. It deals only with safety aspects and is not intended to define a standard for the protection of the equipment used in the system. This third edition cancels and replaces the second edition published in 2005. This edition constitutes a technical revision and includes the following significant technical changes with respect to the previous edition: The list of 'differences in some countries' was transferred from the 'Foreword' to informative Annex D. Some new terms and definitions were added. All Figures were reworked among other things concerning equipotential bonding and earthing details and were incorporated in the text at the appropriate places. Clause 11 'Protection against atmospheric overvoltages and elimination of potential differences' was completely reworked and re-structured taking into account among other things the provisions and requirements of the IEC 62305 series on 'Lightning protection'. New informative Annex A on 'Earth loop impedance' was added. New informative Annex C on 'Examples of calculation of risk due to lightning' was added. Former Annex B on 'Special conditions using IT power line networks' was re-worded and incorporated in Annex D as 'Difference in Norway'.

Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste - Teil 11: Sicherheitsanforderungen

Réseaux câblés pour les signaux de télévision, les signaux sonores et les services interactifs - Partie 11: Sécurité

Kabelska omrežja za televizijske in zvokovne signale ter interaktivne storitve - 11. del: Varnost (IEC 60728-11:2010)

Ta del IEC 60728 obravnava varnostne zahteve, ki veljajo za fiksno nameščene sisteme in opremo. Kolikor je to primerno, velja tudi za mobilne in začasno nameščene sisteme, na primer bivalna vozila. Dodatne zahteve se lahko nanašajo na primer na: – električne inštalacije stavb in nadzemne linije; - druge distribucijske sisteme telekomunikacijskih storitev; - sisteme za distribucijo vode; - sisteme za distribucijo plina, - sisteme zaščite pred strelo. Ta standard posebej predpisuje varnost sistema, osebja, ki na njem dela, in opreme za naročnike. Obravnava varnostne vidike in ni namenjen opredeljevanju standarda za varovanje opreme, ki se uporablja v sistemu.

General Information

• Status: Withdrawn
• Publication Date: 21-Oct-2010
• Withdrawal Date: 30-Sep-2013
• ICS: 33.060.40 - Cabled distribution systems
• Technical Committee: CLC/TC 209 - Cable networks for television signals, sound signals and interactive services
• Drafting Committee: IEC/TC 100 - IEC_TC_100
• Parallel Committee: IEC/TC 100 - IEC_TC_100
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 26-May-2020
• Completion Date: 26-May-2020
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Ref Project: SIST EN 60728-11:2011 - Cable networks for television signals, sound signals and interactive services - Part 11: Safety (IEC 60728-11:2010)

Relations

• Replaces: EN 60728-11:2005 - Cable networks for television signals, sound signals and interactive services - Part 11: Safety
• Effective Date: 28-Jan-2023
• Replaced By: EN 60728-11:2017 - Cable networks for television signals, sound signals and interactive services - Part 11: Safety
• Effective Date: 16-Jul-2014

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2011
1DGRPHãþD
SIST EN 60728-11:2006
Kabelska omrežja za televizijske in zvokovne signale ter interaktivne storitve - 11.
del: Varnost
Cable networks for television signals, sound signals and interactive services - Part 11:
Safety
Ta slovenski standard je istoveten z: EN 60728-11:2010
ICS:
33.060.40 Kabelski razdelilni sistemi Cabled distribution systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60728-11
NORME EUROPÉENNE
October 2010
EUROPÄISCHE NORM
ICS 33.060.40 Supersedes EN 60728-11:2005

English version
Cable networks for television signals, sound signals and interactive
services -
Part 11: Safety
(IEC 60728-11:2010)
Réseaux câblés pour les signaux de Kabelnetze für Fernsehsignale,
télévision, les signaux sonores et les Tonsignale und interaktive Dienste -
services interactifs - Teil 11: Sicherheitsanforderungen
Partie 11: Sécurité (IEC 60728-11:2010)
(CEI 60728-11:2010)
This European Standard was approved by CENELEC on 2010-10-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60728-11:2010 E
Foreword
The text of document 100/1679/FDIS, future edition 3 of IEC 60728-11, prepared by IEC TC 100, Audio,
video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 60728-11 on 2010-10-01.
This European Standard supersedes EN 60728-11:2005.
EN 60728-11:2005.
– The list of "differences in some countries" was transferred from the "Foreword" to informative Annex D.
– Some new terms and definitions were added.
– All Figures were reworked among other things concerning equipotential bonding and earthing details
and were incorporated in the text at the appropriate places.
– Clause 11 "Protection against atmospheric overvoltages and elimination of potential differences" was
completely reworked and re-structured taking into account among other things the provisions and
requirements of the EN 62305 series on "Lightning protection".
– New informative Annex A on "Earth loop impedance" was added.
– New informative Annex C on "Examples of calculation of risk due to lightning" was added.
– Former Annex B on "Special conditions using IT power line networks" was re-worded and incorporated
in Annex ZA as "Special National Condition in Norway".
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2011-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-10-01
For this European Standard the informative Annex D of IEC 60728-11:2010 shall be disregarded and has
been replaced by the informative Annexes ZA, Special National Conditions, and ZB, A deviations.
Annexes ZA, ZB, and ZC have been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60728-11:2010 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60728-1 NOTE  Harmonized as EN 60728-1.
__________
- 3 - EN 60728-11:2010
Add the following annexes:
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 the European Standard.
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
ZA.1 Norway
6.2
The following parts of the standard are not applicable due to Special National Conditions:
• For new and rebuilt coaxial electronic communication networks the outer
conductor of the coaxial cable leading into a building shall be galvanic and
isolated from the outer conductor of the coaxial cable inside the building;
• Examples of installations inside buildings described in 6.2g, 6.2i, 6.2l and shown in
Figure 2, Figure 4, Figure 5 and Figure 7 shall be equipped with a galvanic isolator
separating local earth from the cable network distribution lines;
• Galvanic isolators shall withstand the following requirements:
• Applying a 50 Hz AC voltage of 300 V between the input and the output of
RMS
the outer conductor of the galvanic isolator for a period of not less than 20 min, the
leakage current shall not exceed 8 mA . Applying a continues DC voltage of 2 120 V
RMS
between the input and the output of the outer conductor of the galvanic isolator for a
period of not less than 1 min, the leakage current shall not exceed 0,7 mA.
It shall not be possible to touch metallic parts of the galvanic isolator when connected.
ZA.2 Norway
6.3
ZA.2.1 Justification
In most parts of Norway, the AC mains power are built as an IT- or TT-network with a line-
to-line voltage of 230 V (see Figure ZA.1).
These types of networks have no N-conductor, and the AC mains power is supplied to the
equipment from two of the three line conductors (IEC 60950-1:2005, Annex V).

L1L1
L2L2
L3L3
1 AC power distribution, IT system, line-to- 2 Voltage limiter
line voltage 230 V
3 Equipotential bonding bar 4 Earth electrode
Figure ZA.1 – IT power distribution system in Norway
For a cable network covering an area with this type of power supply networks, special
initiative should be taken to ensure that safety in the cable network is maintained. The
following equipotential bonding arrangements described will provide necessary safety in
such a network.
ZA.2.2 Equipotential bonding mechanism for cable networks
ZA.2.2.1 Installations in the vicinity of transformer stations
Any earth electrode in a cable network shall preferably be located at a minimum distance of
20 m from the nearest earth electrode in a high-power transformer station (high to mains
voltage) (see Figure ZA.2 and ITU-T K.8 or EN 50174-3).
If the above-mentioned distance is less than 20 m, all equipment in the cable network shall
be electrically isolated from local earth by mounting the equipment within a non-metallic
enclosure, as shown in Figure ZA.3. Mains powered equipment with local power feeding
should not be used in this case.
Before any work on the installation is started, measurements shall be carried out to reveal if
there are any hazardous voltages between local earth and the earth for the cable network.

The safety sign "Warning about hazardous electrical voltage" according to sign 7.4
of ISO 3864-1:2002 shall be attached to the non-metallic enclosure.
ZA.2.2.2 Cabinets for cable networks located near cabinets/
installations for mains
Cabinets for cable networks placed together with cabinets for mains power distributions
should preferably be placed at a minimum of 2 m apart. If the distance is closer than 2 m, a
common earth electrode between the cabinets shall be used. Examples of such installations
are shown in Figure ZA.4, Figure ZA.5, Figure ZA.6 and Figure ZA.7.

- 5 - EN 60728-11:2010
55 22
>>2200 mm mi minniimumum dm diissttaannccee

1 Earth electrode 2 Non-metallic enclosure
3 Equipotential bonding bar 4 Mains supplied equipment
5 Transforming station 6 High-voltage power transmission
system
Figure ZA.2 – Example of installations located farther than 20 m
away from a transforming station
22 44
LLeessss t thhaann 20 20 m m
minminiimmuum dm diistanstanccee

1 Earth electrode 2 Non-metallic enclosure
3 Equipotential bonding bar 4 Remotely supplied equipment
5 Transforming station 6 High-voltage power transmission
system
Figure ZA.3 – Example of installations located closer than 20m
from a transforming station
L1L1L1
L2L2L2
L3L3L3
===
DDiiststance betance betwweeneen
poinpointtss ooff contact contact
L 1 Common earth electrode 2 Non-metallic enclosure
3 Equipotential bonding bar 4 Mains supplied equipment
5 Metallic enclosure
Figure ZA.4 – Example of cabinets for cable network with locally fed equipment
and mains placed less than 2 m apart

L1L1
L2L2
L3L3
DDiiststanancece b beettwweeeenn
poipointntss ooff c coontntaacctt
L 1 Common earth electrode 2 Non-metallic enclosure
3 Equipotential bonding bar 4 Remotely supplied equipment
5 Metallic enclosure
Figure ZA.5 – Example of cabinets for cable network with remotely fed
equipment and mains placed less than 2 m apart

- 7 - EN 60728-11:2010
1 Earth electrode 2 Non-metallic enclosure
3 Equipotential bonding bar 4 Mains supplied equipment
5 Metallic enclosure
Figure ZA.6 – Example of cabinets for cable network with locally fed equipment
and mains placed more than 2 m apart
L1L1
L2L2
L3L3
DDiiststanance ce
bbeettwweeneen poipointntss
ofof con conttactact
L >L > 2 2 mm
33 33
11 11
1 Earth electrode 2 Non-metallic enclosure
3 Equipotential bonding bar 4 Remotely supplied equipment
5 Metallic enclosure
Figure ZA.7 – Example of cabinets for cable network with remotely fed
equipment and mains placed more than 2m apart

ZA.2.3 Use of galvanic isolation in a cable network with remote power-
feeding
When using galvanic isolation in cable networks with remote power feeding, the amplifier
shall be placed in front of the galvanic isolator as shown in Figure ZA.8.
55 66
1 Galvanic isolator 2 Non-metallic enclosure
3 Voltage dependent protection device 4 Common earth electrode
5 CATV system 6 House internal cable-TV network
Figure ZA.8 – Example of an installation placing the amplifier in front
of the galvanic isolator
A voltage dependent protective device is recommended in order to protect the galvanic
isolator from transient voltages.
The amplifier shall be electrically isolated from the local electrical earth. In case the amplifier
is mounted close to either local electrical earth or installations connected to local electrical
earth, the amplifier shall be placed in such a way that it is not possible to physically touch
both the amplifier and the installation without having to remove a cover or other safety
arrangements. The covers and amplifiers shall be labelled with the safety sign given under
ZA.2.2.1. The covers used shall be designed in such a way that they can only be removed
using a key or a special tool.
ZA.2.4 Use of voltage dependent protective device in a cable network.
Network, property and health shall be protected against failure in isolation between
infrastructures with different levels of voltage and other unwanted high voltages caused by
any kind of high voltage distribution networks or atmospheric discharges.
Depending on the voltages time span, all voltages with local earth as a reference shall be
limited according to following values:
0 to 200 ms  1 030 V
201 to 350 ms    780 V
351 to 500 ms    650 V
501 to 1 000 ms   430 V
1 001 to 2 000 ms   300 V
2 001 to 3 000 ms   250 V
- 9 - EN 60728-11:2010
3 001 to 5 000 ms   200 V
5 001 to 10 000 ms   150 V
More than 10 000 ms    60 V
In Norway, network installations with no mains supplied equipment are usually installed
isolated from local earth due to difficult ground conditions. When calculations show that the
voltage level will rise above 650 V, measures must be taken to reduce the voltage level.
This can be done by connecting a voltage dependent device between the network
installation and local earth. The voltage dependent device must not connect the installations
to local earth in case of a short circuit in mains power.
This implies a safe threshold voltage of 420 V.
Examples of protections using a voltage depending device are shown in Figure 3 and
Figure ZA.9.
1 1
1 Amplifier / passive equipment 2 Equipotential bonding conductor
3 Voltage dependent protection device 4 Common earth electrode
5 Pylon
Figure ZA.9 – Example of protection using a voltage depending device on
network installations on poles
ZA.3
...

SLOVENSKI SIST EN 60728-11
STANDARD
februar 2011
Kabelska omrežja za televizijske in zvokovne signale ter interaktivne
storitve – 11. del: Varnost
Cable networks for television signals, sound signals and interactive services –
Part 11: Safety
Réseaux câblés pour les signaux de télévision, les signaux sonores et les
services interactifs – Partie 11: Sécurité

Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste –
Teil 11: Sicherheitsanforderungen

Referenčna oznaka
ICS 33.060.40 SIST EN 60728-11:2011 (sl)

Nadaljevanje na straneh II in III ter od 1 do 80

© 2014-06. Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 60728-11 : 2011
NACIONALNI UVOD
Standard SIST EN 60728-11 (sl), Kabelska omrežja za televizijske in zvokovne signale ter interaktivne
storitve – 11. del: Varnost (IEC 60728-11:2010), 2011, ima status slovenskega standarda in je
istoveten evropskemu standardu EN 60728-11 (en), Cable networks for television signals, sound
signals and interactive services – Part 11: Safety (IEC 60728-11:2010), 2010.

Ta standard nadomešča SIST EN 60728-11:2006.

NACIONALNI PREDGOVOR
Evropski standard EN 60728-11:2010 je pripravil tehnični pododbor Mednarodne elektrotehniške
komisije IEC/100 Avdio, video in multimedijski sistemi in oprema, vzporedno je standard potrdil
tehnični odbor Evropskega komiteja za standardizacijo v elektrotehniki CENELEC/TC 100 Avdio, video
in multimedijski sistemi in oprema.

Slovenski standard SIST EN 60728-11:2011 je prevod evropskega standarda EN 60728-11:2011. V
primeru spora glede besedila slovenskega prevoda v tem standardu je odločilen izvirni evropski
standard v angleškem jeziku. Slovensko izdajo standarda je pripravil tehnični odbor SIST/TC AVM
Avdio, video in multimedijski sistemi in oprema.

Odločitev za privzem tega standarda je 4. novembra 2010 sprejel tehnični odbor SIST/TC AVM Avdio,
video in multimedijski sistemi in oprema.

ZVEZA Z NACIONALNIMI STANDARDI
S privzemom tega evropskega standarda veljajo za omenjeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno standardizacijo:
SIST R064-004 Električne inštalacije zgradb – Zaščita pred elektromagnetnimi motnjami v
inštalacijah zgradb
SIST EN 50117 (skupina) Koaksialni kabli
SIST EN 50164-1 Elementi za zaščito pred strelo (LPC) – 1. del: Zahteve za povezovalne
elemente
SIST EN 50164-2 Elementi za zaščito pred strelo (LPC) – 2. del: Zahteve za vodnike in
ozemljila
SIST EN 50174-2 Informacijska tehnologija – Polaganje kablov – 2. del: Načrtovanje
inštalacij in tehnike dela v stavbah
SIST EN 50310 Izenačitev potencialov in ozemljevanje v stavbah z opremo informacijske
tehnologije
SIST EN 60065:2003 Avdio, video in sorodni elektronski aparati – Varnostne zahteve (IEC
+ A11:2009  60065:2001, spremenjen)
SIST HD 60364 (skupina) Električne inštalacije zgradb
SIST HD 60364-1 Nizkonapetostne električne inštalacije – 1. del: Temeljna načela,
ocenjevanje splošnih značilnosti, definicije
SIST HD 60364-5-52 Nizkonapetostne električne inštalacije – 5-52. del: Izbira in namestitev
električne opreme – Inštalacijski sistemi
SIST HD 60364-5-54 Nizkonapetostne električne inštalacije – 5-54. del: Izbira in namestitev
električne opreme – Ozemljitve in zaščitni vodniki (IEC 60364-5-54:2011)
SIST EN 60529 Stopnja zaščite, ki jo zagotavlja ohišje (koda IP)
SIST EN 60617 Grafični simboli za sheme
II
SIST EN 60728-11 : 2011
SIST EN 60825-1:2009 Varnost laserskih izdelkov – 1. del: Klasifikacija opreme in zahteve
(IEC 60825-1:2007)
SIST EN 60825-2 Varnost laserskih izdelkov – 2. del: Varnost komunikacijskih sistemov z
optičnimi vlakni (OFCS) (IEC 60825-2:2004)
SIST EN 60950-1:2006 Oprema za informacijsko tehnologijo – Varnost – 1. del: Splošne zahteve
+ A11:2009 (IEC 60950-1:2005, spremenjen)
SIST EN 60990 Metode za merjenje toka dotika in toka v zaščitnem vodniku
SIST EN 61140:2002 Zaščita pred električnim udarom – Skupni vidiki za inštalacijo in opremo
(IEC 61140:2001)
SIST EN 62305 (skupina) Zaščita pred delovanjem strele
SIST EN 62305-2:2006 Zaščita pred delovanjem strele – 2. del: Vodenje rizika (vključuje program
+ corr. november:2006 za oceno rizika) (IEC 62305-2:2006) (nadomeščen s SIST EN 62305-
2:2012)
SIST EN 62305-3:2006 Zaščita pred delovanjem strele – 3. del: Fizična škoda na zgradbah in
+ A11:2009 nevarnost za živa bitja (IEC 62305-3:2010, spremenjen) (nadomeščen s
SIST EN 62305-3:2011)
SIST EN 62305-4 Zaščita pred delovanjem strele – 4. del: Električni in elektronski sistemi v
zgradbah (IEC 62305-4:2010, spremenjen)
SIST ISO 3864-1:2003 Grafični simboli – Opozorilne barve in opozorilni znaki – 1. del: Načela
načrtovanja opozorilnih znakov in opozorilnih oznak (nadomeščen s SIST
ISO 3864-1:2012)
OSNOVA ZA IZDAJO STANDARDA
– privzem standarda EN 60728-11:2010

PREDHODNA IZDAJA
– EN 60728-11:2006, Kabelska omrežja za televizijske in zvokovne signale ter interaktivne storitve
– 11. del: Varnost (IEC 60728-11:2005, spremenjen)

OPOMBE
– Povsod, kjer se v besedilu standarda uporablja izraz "evropski standard" ali "mednarodni
standard" v SIST EN 60728-11:2011 to pomeni “slovenski standard”.

– Nacionalni uvod in nacionalni predgovor nista sestavni del standarda.

– Ta nacionalni dokument je istoveten EN 60728-11:2010 in je objavljen z dovoljenjem

CEN /CENELEC
Upravni center
Avenue Marnix 17
B-1000 Bruselj
This national document is identical with EN 60728-11:2010 and is published with the permission of

CEN /CENELEC
Management Centre
Avenue Marnix 17
B -1000 Brussels
POMEMBNO: Logotip "notranjost v barvah" na platnicah te publikacije opozarja, da vsebuje barve, ki so potrebne za
pravilno razumevanje njene vsebine. Uporabniki morajo zato tiskati ta dokument z barvnim tiskalnikom.
III
EVROPSKI STANDARD EN 60728-11
EUROPEAN STANDARD
EUROPÄISCHE NORM
NORME EUROPÉENNE oktober 2010
ICS: 33.060.40 Nadomešča EN 60728-11:2005

Slovenska izdaja
Kabelska omrežja za televizijske in zvokovne signale ter interaktivne storitve –
11. del: Varnost
Cable networks for television Réseaux câblés pour les signaux de Kabelnetze für Fernsehsignale,
signals, sound signals and télévision, les signaux sonores et les Tonsignale und interaktive Dienste –
interactive services – Part 11: services interactifs – Partie 11: Teil 11: Sicherheitsanforderungen
Safety (IEC 60728-11:2010) Sécurité (CEI 60728-11:2010) (IEC 60728-11:2010)

Evropski standard je odobril CENELEC dne 1. oktobra 2010. Člani CENELEC morajo izpolnjevati
notranja pravila CEN/CENELEC, ki določajo pogoje, pod katerimi ta evropski standard dobi status
nacionalnega standarda brez kakršnih koli sprememb.

Seznami najnovejših izdaj teh nacionalnih standardov in njihovi bibliografski podatki so na zahtevo na
voljo pri Centralnem sekretariatu ali članih CENELEC.

Ta evropski standard obstaja v treh uradnih izdajah (angleški, francoski in nemški). Izdaje v drugih
jezikih, ki jih člani CENELEC na lastno odgovornost prevedejo v svoj uradni jezik in izdajo ter prijavijo
pri Centralnem sekretariatu, veljajo kot uradne izdaje.

Člani CENELEC so nacionalni elektrotehniški komiteji Avstrije, Belgije, Bolgarije, Cipra, Češke
republike, Danske, Estonije, Finske, Francije, Hrvaške, Grčije, Islandije, Irske, Italije, Latvije, Litve,
Luksemburga, Madžarske, Malte, 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 Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Centralni sekretariat: Avenue Marnix 17, B-1050 Bruselj

© 2010 CENELEC  Lastnice avtorskih pravic so vse države članice CENELEC Ref. oznaka EN 60728-11:2010 E

SIST EN 60728-11 : 2011
Predgovor k evropskemu standardu
Besedilo dokumenta 100/1679/FDIS, prihodnja tretja izdaja standarda IEC 60728-11, ki jo je pripravil
tehnični odbor IEC/TC 100 Zvokovni, slikovni in večpredstavni sistemi in oprema je bilo predloženo v
vzporedno glasovanje IEC-CENELEC in ga je CENELEC 1. oktobra 2010 odobril kot EN 60728-11.
Ta evropski standard nadomešča EN 60728-11:2005.
Standard EN 60728-11:2010 vsebuje v primerjavi s standardom EN 60728-11:2005 naslednje
pomembne tehnične spremembe:
– Seznam "razlik v posameznih državah" je bil prestavljen iz "Predgovora" v informativni dodatek D.
– Dodani so bili nekateri novi izrazi in definicije.
– Vse slike, ki med drugim zadevajo podrobnosti sestava za izenačitev potencialov in ozemljevanje,
so bile predelane in vstavljene na ustrezna mesta v besedilo.
– Točka 11 "Zaščita pred atmosferskimi razelektritvami in odprava potencialnih razlik" je bila
predelana v celoti in preoblikovana ob upoštevanju, med drugim, določil in zahtev iz skupine
standardov EN 62305, "Zaščita pred delovanjem strele".
– Dodan je bil nov informativni dodatek A, "Impedanca ozemljitvene zanke".
– Dodan je bil nov informativni dodatek C, "Primeri izračunov rizika zaradi udara strele".
– Prejšnji informativni dodatek B, "Posebni pogoji za uporabo IT-močnostnih napajalnih omrežij", je
bil predelan in vključen v dodatek ZA, "Posebni nacionalni pogoji na Norveškem".
Opozariti je treba na možnost, da so nekateri deli tega dokumenta lahko predmet patentnih pravic.
CEN in CENELEC nista odgovorna za prepoznavanje katere koli ali vseh takih patentnih pravic.
Določena sta bila naslednja datuma:
– zadnji datum, do katerega mora EN dobiti status
nacionalnega standarda bodisi z objavo
istovetnega besedila ali z razglasitvijo (dop) 2011-07-01
– zadnji datum, ko je treba razveljaviti nacionalne
standarde, ki so z EN v nasprotju (dow) 2013-10-01

V tem evropskem standardu se ne upošteva informativni dodatek D k standardu IEC 60728-11:2010 in
je zamenjan z informativnima dodatkoma ZA, Posebni nacionalni pogoji, in ZB, A-deviacije.
Dodatke ZA, ZB in ZC je dodal CENELEC.
____________
Razglasitvena objava
Besedilo mednarodnega standarda IEC 60728-11:2010 je CENELEC odobril kot evropski standard
brez sprememb.
V uradni izdaji je treba v Literaturi za navedene standarde dodati naslednjo opombo:
IEC 60728-1 OPOMBA: Harmoniziran kot EN 60782-1.

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SIST EN 60728-11 : 2011
Dodatek ZA
(normativni)
Posebni nacionalni pogoji
Posebni nacionalni pogoj: je nacionalna značilnost ali praksa, ki se ne more spremeniti celo v daljšem
obdobju, na primer podnebne razmere, električne ozemljilne razmere.
OPOMBA: Če vpliva na harmonizacijo, tvori del evropskega standarda.
V državah, za katere veljajo posebni nacionalni pogoji, so ta določila normativna, v ostalih državah pa
so informativna.
Točka Posebni nacionalni pogoj
6.2 ZA.1 Norveška
Zaradi posebnih nacionalnih pogojev se ne uporabljajo naslednji deli standarda:
– pri novih in obnovljenih koaksialnih elektronskih komunikacijskih omrežjih mora biti
zunanji vodnik koaksialnega kabla, ki vstopa v stavbo, galvansko ločen od zunanjega
vodnika koaksialnega kabla v stavbi;
– primeri inštalacij v stavbah, opisani v 6.2.g, 6.2.i in 6.2.l ter prikazani na sliki 2, sliki 4,
sliki 5 in sliki 7, morajo biti opremljeni z galvanskimi ločilniki, ki ločijo lokalno ozemljitev
od distribucijskih vodov kabelskega omrežja;
– galvanski ločilniki morajo vzdržati naslednje zahteve:
– če se med vhod in izhod zunanjega vodnika galvanskega ločilnika priključi izmenična
napetost 300 V s frekvenco 50 Hz za čas, ki ni krajši od 20 min, uhajavi tok ne sme
RMS
preseči 8 mA . Če se med vhod in izhod zunanjega vodnika galvanskega ločilnika
RMS
priključi enosmerna napetost 2 120 V za čas, ki ni krajši od 1 min, uhajavi tok ne sme
preseči 0,7 mA.
Kadar je galvanski ločilnik priključen, mora biti preprečena možnost dotika njegovih
kovinskih delov.
6.3 ZA.2 Norveška
ZA.2.1 Obrazložitev
V večini delov Norveške je elektrodistribucijsko omrežje zgrajeno kot omrežje IT ali TT z
napetostjo med vodniki 230 V (glej sliko ZA.1).
Te vrste omrežij nimajo nevtralnega vodnika (vodnik N) in izmenična energija se dovaja
opremi po dveh od treh linijskih vodnikih (IEC 60950-1:2005, dodatek V).
SIST EN 60728-11 : 2011
1 Distribucija energije, sistem IT, napetost med vodniki 230 V 2 Napetostni omejevalnik
3 Zbiralka za izenačitev potencialov 4 Ozemljilo

Slika ZA.1: Sistem distribucije omrežnega napajanja IT na Norveškem
Pri kabelskih omrežjih, ki pokrivajo območja s tem načinom distribucije omrežnega napajanja, je treba
posebno pozornost nameniti zagotavljanju varnosti kabelskega omrežja. Varnost v takem omrežju
bodo zagotovili naslednji načini izenačitve potencialov.
ZA.2.2 Sistem izenačitve potencialov za kabelska omrežja
ZA.2.2.1 Namestitev v bližini transformatorskih postaj
Nobeno ozemljilo v kabelskem omrežju ne sme biti oddaljeno manj kot 20 m od najbližjega ozemljila
elektroenergetske transformatorske postaje (visoka omrežna napetost) (glej sliko ZA.2 in ITU-T K.8 ali
EN 50174-3).
Če je zgoraj omenjena razdalja manjša od 20 m, mora biti vsa oprema kabelskega omrežja električno
izolirana od lokalne ozemljitve, tako da se namesti v nekovinske omare, kot kaže slika ZA.3. V tem
primeru se ne sme uporabljati oprema z lokalnim napajanjem, napajana preko omrežnega napajanja.
Pred začetkom nameščanja je treba z meritvami preveriti, ali med lokalno ozemljitvijo in ozemljitvijo
kabelskega sistema obstajajo nevarne napetosti.
Nekovinsko ohišje mora biti označeno z znakom "POZOR – visoka napetost!" v skladu z
znakom 7.4 v ISO 3864-1:2002.
ZA.2.2.2 Omarice za kabelska omrežja, nameščene blizu omaric/inštalacij omrežnega napajanja
Omarice za kabelska omrežja, nameščene skupaj z omaricami za distribucijo omrežnega napajanja,
morajo biti po možnosti med seboj oddaljene vsaj 2 m. Če je razdalja manjša od 2 m, je treba uporabiti
skupno ozemljilo med obema omaricama. Primeri takih namestitev so prikazani na sliki ZA.4, sliki
ZA.5, sliki ZA.6 in sliki ZA.7.
SIST EN 60728-11 : 2011
Najmanjša razdalja > 20 m
1 Ozemljilo 2 Nekovinska omarica
3 Zbiralka za izenačitev potencialov 4 Oprema, napajana iz omrežja
5 Transformatorska postaja 6 Visokonapetos
...