Electrical installations for lighting and beaconing of aerodromes - Safety secondary circuits in series circuits - General safety requirements

This International Standard specifies protective provisions for the operation of lamp systems
powered by series circuits in aeronautical ground lighting.
The protective provisions described here refer only to secondary supply systems for loads
that are electrically separated from the series circuit.
This standard specifies the level of SELV, and alternatively PELV, under consideration of
additional personnel protection during work on live secondary circuits by electrically skilled
persons. This standard also covers the special operational features of aeronautical ground
lighting and addresses the level of training and the requirements for maintenance procedures
detailed in IEC 61821.
The requirements and tests are intended to set a specification framework for system
designers, users, and maintenance personnel to ensure a safe and economic use of electrical
systems in installations for the beaconing of aerodromes.
This standard complements existing IEC Airfield-Ground- Lighting (AGL) standards and can
be used as a design specification.

Elektrische Anlagen für Beleuchtung und Befeuerung von Flugplätzen - Sicherheitssekundärkreise in Serienstromkreisen - Allgemeine Sicherheitsfestlegungen

Installations électriques pour l’éclairage et le balisage des aérodromes - Circuits secondaires de sécurité dans des circuits série - Exigences générales de sécurité

L'IEC 62870:2015 spécifie des dispositions de protection pour le fonctionnement de systèmes de feux alimentés par des circuits série pour le balisage lumineux aéronautique au sol. Les dispositions de protection décrites ici se rapportent uniquement à des systèmes d'alimentation secondaires pour des charges séparées électriquement du circuit série.

Električne inštalacije za razsvetljavo in radijske javljalnike na letališčih - Sekundarni varnostni tokokrogi v seriji vezja - Splošne varnostne zahteve

Ta mednarodni standard navaja zaščitne ukrepe za delovanje sijalčnih sistemov z napajanjem prek zaporednih tokokrogov za talno razsvetljavo letališč. V tem standardu opisani zaščitni ukrepi se sklicujejo le na sekundarne napajalne sisteme za obremenitve, ki so električno ločene od zaporednega tokokroga. Ta standard navaja raven varnostne male napetosti SELV in alternativno tudi varnostne male napetosti PELV z upoštevanjem dodatne zaščite za elektrotehnično usposobljeno osebje med izvajanjem del na sekundarnih tokokrogih pod napetostjo. Ta standard zajema tudi posebne funkcije obratovanja talne razsvetljave letališč ter obravnava raven usposobljenosti in zahteve za postopke vzdrževanja, podrobneje opisane v standardu IEC 61821.
Zahteve in preskusi določajo okvirno specifikacijo za projektante sistemov, uporabnike in vzdrževalno osebje za zagotavljanje varne in gospodarne uporabe električnih sistemov v instalacijah za radijske javljalnike na letališčih. Ta standard dopolnjuje obstoječe standarde IEC za talno razsvetljavo letališč (AGL) in ga je mogoče uporabiti kot projektno specifikacijo.

General Information

Status
Published
Publication Date
16-Feb-2016
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
18-Jan-2016
Due Date
24-Mar-2016
Completion Date
17-Feb-2016

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SLOVENSKI STANDARD
SIST EN 62870:2016
01-marec-2016
(OHNWULþQHLQãWDODFLMH]DUD]VYHWOMDYRLQUDGLMVNHMDYOMDOQLNHQDOHWDOLãþLK
6HNXQGDUQLYDUQRVWQLWRNRNURJLYVHULMLYH]MD6SORãQHYDUQRVWQH]DKWHYH

Electrical installations for lighting and beaconing of aerodromes - Safety secondary

circuits in series circuits - General safety requirements

Installations électriques pour l’éclairage et le balisage des aérodromes - Circuits

secondaires de sécurité dans des circuits série - Exigences générales de sécurité

Ta slovenski standard je istoveten z: EN 62870:2015
ICS:
29.140.50 Instalacijski sistemi za Lighting installation systems
razsvetljavo
93.120 *UDGQMDOHWDOLãþ Construction of airports
SIST EN 62870:2016 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 62870:2016
---------------------- Page: 2 ----------------------
SIST EN 62870:2016
EUROPEAN STANDARD EN 62870
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2015
ICS 29.140.50; 93.120
English Version
Electrical installations for lighting and beaconing of aerodromes -
Safety secondary circuits in series circuits - General safety
requirements
(IEC 62870:2015)

Installations électriques pour l'éclairage et le balisage des Elektrische Anlagen für Beleuchtung und Befeuerung von

aérodromes - Circuits secondaires de sécurité dans des Flugplätzen - Sicherheitssekundärkreise in

circuits série - Exigences générales de sécurité Serienstromkreisen - Allgemeine Sicherheitsfestlegungen

(IEC 62870:2015) (IEC 62870:2015)

This European Standard was approved by CENELEC on 2015-10-21. 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 CEN-CENELEC

Management Centre 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 CEN-CENELEC Management Centre 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, 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

© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 62870:2015 E
---------------------- Page: 3 ----------------------
SIST EN 62870:2016
EN 62870:2015
European foreword

The text of document 97/167/FDIS, future edition 1 of IEC 62870, prepared by IEC/TC 97 "Electrical

installations for lighting and beaconing of aerodromes" was submitted to the IEC-CENELEC parallel

vote and approved by CENELEC as EN 62870:2015.
The following dates are fixed:
(dop) 2016-07-21
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2018-10-21
• latest date by which the national standards conflicting with
the document have to be withdrawn

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.
Endorsement notice

The text of the International Standard IEC 62870:2015 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 60364-1 NOTE Harmonized as HD 60364-1.
IEC 61558-1:2005 NOTE Harmonized as EN 61558-1:2005 (not modified).
---------------------- Page: 4 ----------------------
SIST EN 62870:2016
EN 62870:2015
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),

the relevant EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is

available here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60364-4-41 - Low-voltage electrical installations - HD 60364-4-41 -
Part 4-41: Protection for safety -
Protection against electric shock
IEC 60417 - Graphical symbols for use on equipment - -
IEC 60529 - Degrees of protection provided by EN 60529 -
enclosures (IP Code)
IEC 61000-6-2 - Electromagnetic compatibility (EMC) - EN 61000-6-2 -
Part 6-2: Generic standards - Immunity
for industrial environments
IEC 61000-6-4 - Electromagnetic compatibility (EMC) - EN 61000-6-4 -
Part 6-4: Generic standards - Emission
standard for industrial environments
IEC 61140 - Protection against electric shock - EN 61140 -
Common aspects for installation and
equipment
IEC 61558-2-4 - Safety of transformers, reactors, power EN 61558-2-4 -
supply units and similar products for
supply voltages up to 1 100 V -
Part 2-4: Particular requirements and
tests for isolating transformers and
power supply units incorporating
isolating transformers
IEC 61558-2-6 - Safety of transformers, reactors, power EN 61558-2-6 -
supply units and similar products for
supply voltages up to 1 100 V -
Part 2-6: Particular requirements and
tests for safety isolating transformers
and power supply units incorporating
safety isolating transformers
---------------------- Page: 5 ----------------------
SIST EN 62870:2016
EN 62870:2015
Publication Year Title EN/HD Year
IEC 61821 - Electrical installations for lighting and EN 61821 -
beaconing of aerodromes - Maintenance
of aeronautical ground lighting constant
current series circuits
IEC 61822 - Electrical installations for lighting and EN 61822 -
beaconing of aerodromes - Constant
current regulators
IEC 61823 - Electrical installations for lighting and EN 61823 -
beaconing of aerodromes - AGL series
transformers
CISPR 11 - Industrial, scientific and medical EN 55011 -
equipment - Radio-frequency
disturbance characteristics - Limits and
methods of measurement
CISPR 22 - Information technology equipment - EN 55022 -
Radio disturbance characteristics -
Limits and methods of measurement
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SIST EN 62870:2016
IEC 62870
Edition 1.0 2015-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical installations for lighting and beaconing of aerodromes –Safety
secondary circuits in series circuits – General safety requirements
Installations électriques pour l’éclairage et le balisage des aérodromes –
Circuits secondaires de sécurité dans des circuits série – Exigences générales
de sécurité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.50; 93.120 ISBN 978-2-8322-2896-8

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 62870:2016
– 2 – IEC 62870:2015 © IEC 2015
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 7

4 Requirements for the SELV/PELV supply ......................................................................... 9

4.1 General ................................................................................................................... 9

4.2 SELV/PELV-safety demarcation line in an AGL series circuit ................................ 10

4.3 Environmental conditions ...................................................................................... 11

4.4 Degree of protection provided by enclosures ........................................................ 11

4.5 Electromagnetic compatibility (EMC) ..................................................................... 11

4.5.1 Limits of electromagnetic emission ................................................................ 11

4.5.2 Limits of immunity .......................................................................................... 12

4.6 Marking ................................................................................................................. 12

4.6.1 Marking of the SELV/PELV power supply ....................................................... 12

4.6.2 Marking at the installation locations ............................................................... 12

4.7 Protection against electric shock ........................................................................... 12

4.7.1 Basic requirements ........................................................................................ 12

4.7.2 Protective measure to be applied ................................................................... 12

4.7.3 Protective separation from the primary series circuit ...................................... 13

4.7.4 Assemblies in the SELV/PELV supply ............................................................ 13

4.7.5 Load of the SELV/PELV supply ...................................................................... 13

4.8 Interfaces .............................................................................................................. 14

4.8.1 Supply unit .................................................................................................... 14

4.8.2 Connectors .................................................................................................... 14

5 Testing .......................................................................................................................... 14

5.1 Type tests ............................................................................................................. 14

5.2 Routine tests......................................................................................................... 14

Annex A (informative) System design selection .................................................................... 15

Bibliography .......................................................................................................................... 16

Figure 1 – Safety demarcation line in a SELV system ........................................................... 10

Figure 2 – Safety demarcation line in a PELV system ........................................................... 11

Table A.1 – Comparison of characteristics of PELV and SELV .............................................. 15

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SIST EN 62870:2016
IEC 62870:2015 © IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSTALLATIONS FOR
LIGHTING AND BEACONING OF AERODROMES –
SAFETY SECONDARY CIRCUITS IN SERIES CIRCUITS –
GENERAL SAFETY REQUIREMENTS
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62870 has been prepared by IEC technical committee 97:

Electrical installations for lighting and beaconing of aerodromes.
The text of this standard is based on the following documents:
FDIS Report on voting
97/167/FDIS 97/169/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

---------------------- Page: 9 ----------------------
SIST EN 62870:2016
– 4 – IEC 62870:2015 © IEC 2015

The committee has decided that the contents of this 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.
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SIST EN 62870:2016
IEC 62870:2015 © IEC 2015 – 5 –
INTRODUCTION

With a few exceptions, aeronautical ground lighting is designed for series circuit technology

operating with a constant current and a maximum input voltage of 5 000 V a.c. rms, including

tolerances. The input voltage to the series circuit is constantly adjusted by the constant

current regulator to maintain the series circuit current irrespective of the variations in the load.

The properties and characteristics of the constant current regulators are provided in

IEC 61822. Due to the structure of the series circuit, i.e. a series connection of all loads, the

usual protective devices for personnel protection of an IT, TT or TN network cannot be

applied.

Aeronautical ground lighting is defined as any light provided as an aid to air navigation and as

such is subject to specific requirements with respect to its resilience, availability, and

serviceability levels. Therefore, insulation faults in the series circuit are often tolerated, and

do not lead to the automatic disconnection of the electrical supply to the series circuit.

In view of the above IEC 61821 states that no work of any kind is normally permitted on live

series circuits without first conducting a suitable and sufficient Risk Assessment and using

appropriate protective equipment according to IEC 61821.

The electrical characteristics of the constant current series circuits are often confused with

those of IT, TT or TN networks, i.e. constant input voltage, equipment connected in parallel,

and a load-dependent current. In practice, it is not always easy to assign rated voltages

correctly to individual components of the series circuit or to determine possible touch

voltages. In a constant current series circuits, the rated voltage of the equipment in the series

circuit and the maximum touch voltage frequently exceed the normal mains input voltage.

In a series circuit installation the series circuit input voltage is divided in proportion to the

internal resistances of the various loads. The rated voltage, i.e. the voltage between the input

lines of the equipment, is defined by the series circuit current that flows through the

equipment and its input impedance. Since input impedance depends on the equipment design

and the series circuit current is constant, the input voltage remains the same for each item of

equipment. As a result of the provision of current control in the series circuit the series circuit

input voltage is load-dependent and corresponds to the sum of all partial voltages in the

series circuit.

This is different to determining the maximum possible touch voltage to earth in a series

circuit. Since one or more earth faults, of varying resistance to earth, maybe present, the

touch voltage to earth may assume any value up to the maximum series circuit input voltage

depending on the location of the earth fault and the equipment installed in the series circuit.

Therefore when determining the dielectric strength against earth potential it is usual to take

the maximum series circuit input voltage. Such peculiarities of the series circuit have been

taken into account in the requirements for lamp systems in this standard.

Since there are only a few effective safety features available for personnel protection in series

circuit technology the protective measure “Safety extra low voltage (SELV)” and “Protective

extra low voltage (PELV)” is applied in this standard for the supply of lamp systems. This

measure is common practice and can resort to the application of well-known and accepted

methodology. The introduction of SELV/PELV in this type of application has been made

possible by the introduction of new i
...

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