IEC 61820-3-2:2023

Electrical installations for lighting and beaconing of aerodromes - Part 3-2: Requirements for power supplies - Particular requirements for series circuits

IEC 61820-3-2:2023 specifies the requirements for power electronic converter systems (PECS) dedicated to powering aeronautical ground lighting (AGL) circuits with series circuit topology. An example of a traditional implementation is an AGL circuit with 6,6 A RMS nominal current, powered by a constant current regulator (CCR). In addition to revising the requirements for 6,6 A CCR setups, this document introduces requirements for general PECS for new AGL systems including systems specifically designed for LED based luminaires.
This first edition cancels and replaces IEC 61822 published in 2009. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to IEC 61822:2009:
a) introduction of power electronic converter systems (PECS) to be used in the aeronautical ground lighting systems other than the 6,6 A aeronautical ground lighting systems;
b) introduction of classification for different device types;
c) introduction of IEC 62477-1:2022 and IEC 62477-2:2018 as the basis for safety related requirements.

Installations électriques pour l'éclairage et le balisage des aérodromes - Partie 3-2 : Exigences relatives aux alimentations électriques - Exigences particulières relatives aux circuits série

L’IEC 61820-3-2:2023 spécifie les exigences relatives aux systèmes électroniques de conversion de puissance (PECS) servant à l’alimentation des circuits du balisage aéronautique au sol (AGL) avec des architectures de circuits série. Un circuit AGL alimenté par un régulateur à courant constant (RCC) avec un courant nominal efficace de 6,6 A, est un exemple de mise en œuvre traditionnelle. Outre la révision des exigences relatives aux configurations à RCC à 6,6 A, le présent document présente les exigences relatives aux PECS généraux applicables aux nouveaux systèmes AGL, y compris les systèmes spécifiquement conçus pour les équipements lumineux à LED.
Cette première édition annule et remplace l’IEC 61822 parue en 2009. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’IEC 61822:2009:
a) Introduction relative aux PECS systèmes électroniques de conversion de puissance à utiliser dans les systèmes d'éclairage et de balisage aéronautique au sol autres que les systèmes d'éclairage et de balisage aéronautique au sol de 6,6 A;
b) Introduction relative à la classification des différents types de dispositifs;
c) Introduction relative à l’IEC 62477-1:2022 et l’IEC 62477-2:2018 comme base des exigences relatives à la sécurité.

General Information

• Status: Published
• Publication Date: 09-Oct-2023
• ICS: 29.140.50 - Lighting installation systems
• ICS: 93.120 - Construction of airports
• Technical Committee: TC 97 - Electrical installations for lighting and beaconing of aerodromes
• Drafting Committee: MT 1 - TC 97/MT 1
• Current Stage: PPUB - Publication issued
• Start Date: 10-Oct-2023
• Completion Date: 10-Nov-2023

Relations

• Replaces: IEC 61822:2009 - Electrical installations for lighting and beaconing of aerodromes - Constant current regulators
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61820-3-2 ®
Edition 1.0 2023-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical installations for lighting and beaconing of aerodromes –
Part 3-2: Requirements for power supplies – Particular requirements for series
circuits
Installations électriques pour l'éclairage et le balisage des aérodromes –
Partie 3-2 : Exigences relatives aux alimentations électriques – Exigences
particulières relatives aux circuits série
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IEC 61820-3-2 ®
Edition 1.0 2023-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical installations for lighting and beaconing of aerodromes –

Part 3-2: Requirements for power supplies – Particular requirements for series

circuits
Installations électriques pour l'éclairage et le balisage des aérodromes –

Partie 3-2 : Exigences relatives aux alimentations électriques – Exigences

particulières relatives aux circuits série

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.50, 93.120 ISBN 978-2-8322-7604-4

– 2 – IEC 61820-3-2:2023 © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Classification . 9
4.1 Base classes . 9
4.2 Voltage classes. 9
4.3 Construction classes . 10
5 Requirements . 10
5.1 General . 10
5.2 Environmental requirements . 10
5.2.1 General . 10
5.2.2 Environmental conditions . 10
5.2.3 Electromagnetic compatibility (EMC) . 11
5.3 Functional requirements . 11
5.3.1 Input voltage . 11
5.3.2 Power ratings . 11
5.3.3 Brightness level control . 11
5.3.4 Remote interface communication . 12
5.3.5 Field circuit isolator . 13
5.3.6 Output performance and regulation . 13
5.3.7 Protective functions . 15
5.3.8 Optional functional requirements . 16
5.4 Performance requirements . 18
5.4.1 Efficiency . 18
5.4.2 Input power factor . 18
5.4.3 Output voltage limitation specific to 6,6 A CCRs . 18
5.4.4 Output voltage limitation specific to general PECS for AGL systems . 18
5.4.5 Output current waveform specific to 6,6 A CCRs. 18
5.4.6 Dynamic response specific to 6,6 A CCRs . 18
5.5 Design requirements . 19
5.5.1 General . 19
5.5.2 Local control . 19
5.5.3 Local indication . 19
5.5.4 Mechanical design . 19
5.5.5 Electrical design . 20
5.5.6 Information and markings . 21
5.6 Protection against hazards . 23
5.6.1 General . 23
5.6.2 SPD monitoring . 23
5.6.3 Specific considerations for the series circuit . 23
5.6.4 Functional safety . 23
5.6.5 Cyber security . 23
6 Type and routine tests . 24
6.1 General . 24

6.2 Type tests . 24
6.3 Routine tests. 25
6.4 Test descriptions . 25
6.4.1 General . 25
6.4.2 Visual inspection . 25
6.4.3 Test of protective functions . 25
6.4.4 Operation test . 27
6.4.5 Performance tests . 28
6.4.6 Mechanical operation test . 30
6.4.7 Electromagnetic compatibility (EMC) . 30
6.4.8 Environmental tests . 31
6.4.9 Optional accessories . 32
Bibliography . 33

Figure 1 – Nameplate . 22
Figure 2 – Open circuit test schematic diagram . 26

Table 1 – Remote control and monitoring functions . 12
Table 2 – Standard 6,6 A CCR output current step pre-settings . 14
Table 3 – Lamp failure indicator . 17
Table 4 – Type and routine tests . 24
Table 5 – Resistive loading test . 28
Table 6 – Reactive loading test . 28

– 4 – IEC 61820-3-2:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSTALLATIONS FOR LIGHTING
AND BEACONING OF AERODROMES –
Part 3-2: Requirements for power supplies –
Particular requirements for series circuits

FOREWORD
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IEC 61820-3-2 has been prepared by IEC technical committee 97: Electrical installations for
lighting and beaconing of aerodromes. It is an International Standard.
This first edition cancels and replaces IEC 61822 published in 2009. This edition constitutes a
technical revision.
This edition includes the following significant technical changes with respect to
IEC 61822:2009:
a) introduction of power electronic converter systems (PECS) to be used in the aeronautical
ground lighting systems other than the 6,6 A aeronautical ground lighting systems;
b) introduction of classification for different device types;

c) introduction of IEC 62477-1:2022 and IEC 62477-2:2018 as the basis for safety related
requirements.
The text of this International Standard is based on the following documents:
Draft Report on voting
97/264/FDIS 97/265/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 61820 series, published under the general title Electrical installations
for lighting and beaconing of aerodromes, can be found on the IEC website.
Future documents in this series will carry the new general title as cited above. Titles of existing
documents in this series will be updated at the time of the next edition.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
– 6 – IEC 61820-3-2:2023 © IEC 2023
INTRODUCTION
This document introduces an open specification for power electronic converter systems (PECS)
to be used in aeronautical ground lighting (AGL) series circuit systems. The aim of this open
specification is to enable various technologies to be used within AGL systems while ensuring
the safe operation and function of the AGL system based on specific items in a series circuit
topology.
This document also includes updated requirements for 6,6 A constant current regulators (CCR),
previously defined in IEC 61822:2009.
The PECS defined in this document are power supplies for AGL circuits with a series circuit
topology. It is possible that a PECS is not interoperable with AGL devices designed for the 6,6 A
system. It is also possible that a PECS is not interoperable with AGL devices from other PECS-
driven AGL systems. Special care should be taken to ensure the interoperability of the AGL
components unless they are specifically designed to be operated together.
To clarify the distinction between different series circuit power supplies, a new classification
system is introduced in Clause 4. A base class divides the power supplies into PECS and CCRs.
In this document the term PECS refers to series circuit power supplies belonging to the class
"General PECS for AGL systems" and the term CCR refers to series circuit power supplies
belonging to the class "CCR for 6,6 A systems". The term PECS/CCR refers to both device
classes. The class "CCR for 6,6 A AGL systems" corresponds to the traditional series circuit
power supplies as defined by IEC 61822:2009.
In addition to the base class, classes for voltage ranges and construction mechanics are
introduced. Where a part of this document only refers to one or more specific AGL systems, the
systems in question will be clearly indicated.
Meanwhile this updated edition can be partially applicable to PECS dedicated to converting
power from a mains supply to power suited for AGL other than series circuit topology. The
maintenance work of IEC 61822:2009 into IEC 61820-3-2 started before the writing of the
related subparts IEC 61820-3-1 and IEC 61820-3-3 had started. This updated version can
therefore be partially applicable to PECS dedicated to converting power from a mains supply to
power suited for AGL systems with other than series circuit topology.

ELECTRICAL INSTALLATIONS FOR LIGHTING
AND BEACONING OF AERODROMES –
Part 3-2: Requirements for power supplies –
Particular requirements for series circuits

1 Scope
This part of IEC 61820 specifies the requirements for power electronic converter systems
(PECS) dedicated to powering aeronautical ground lighting (AGL) circuits with series circuit
topology. An example of a traditional implementation is an AGL circuit with 6,6 A RMS nominal
current, powered by a constant current regulator (CCR). In addition to revising the requirements
for 6,6 A CCR setups, this document introduces requirements for general PECS for new AGL
systems including systems specifically designed for LED based luminaires.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60038, IEC standard voltages
IEC 60076-11, Power transformers – Part 11: Dry-type transformers
IEC 61000-6-4, Electromagnetic compatibility (EMC) – Part 6-4: Generic standards – Emission
standard for industrial environments
IEC 61000-6-5, Electromagnetic compatibility (EMC) – Part 6-5: Generic standards – Immunity
for equipment used in power station and substation environment
IEC 61439-1, Low-voltage switchgear and controlgear assemblies – Part 1: General rules
IEC 61439-2, Low-voltage switchgear and controlgear assemblies – Part 2: Power switchgear
and controlgear assemblies
IEC 61508 (all parts), Functional safety of electrical/electronic/programmable electronic
safety-related systems
IEC 61820-1:2019, Electrical installations for aeronautical ground lighting at aerodromes –
Part 1: Fundamental principles
IEC 62477-1:2022, Safety requirements for power electronic converter systems and equipment
– Part 1: General
IEC 62477-2:2018, Safety requirements for power electronic converter systems and equipment
– Part 2: Power electronic converters from 1 000 V AC or 1 500 V DC up to 36 kV AC or
54 kV DC
CISPR 11, Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement

– 8 – IEC 61820-3-2:2023 © IEC 2023
CISPR 32, Electromagnetic compatibility of multimedia equipment – Emission requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
aeronautical ground lighting constant current series circuit
AGL constant current series circuit
apparatus configured as an electrical circuit designed to produce and operate with a constant
current, independent of variations in the load, in order to provide a specified light output for
aeronautical purposes
3.2
constant current regulator
CCR
apparatus which produces a current output at a constant root mean square (RMS) value
independent of variations in the constant current series circuit load, input voltage and service
conditions as specified
Note 1 to entry: Within this document, the term CCR is reserved for series circuit power supplies belonging to the
class CCR for 6,6 A AGL systems.
Note 2 to entry: It is acknowledged that legacy systems still in use across the world also use alternative current
ratings such as 8,33 A and 12 A but 6,6 A is the present standard. For the purposes of this document, 6,6 A systems
will be referenced only.
3.3
open circuit
AGL constant current series circuit with an unplanned interruption at any location of the primary
current line that produces a hazardous high voltage between the interrupted circuit sections
3.4
forced ventilation
cooling system in which the air is moved by external power
3.5
power electronic converter
PEC
device or part thereof for the purpose of electronic power conversion, including signalling,
measurement, control circuitries and other parts, if essential for the power conversion function
[SOURCE: IEC 62477-1:2022, 3.55]
3.6
power electronic converter system
PECS
one or more power electronic converters intended to work together with other equipment
Note 1 to entry: Within this document, the term PECS is reserved for series circuit power supplies belonging to the
class General PECS for AGL systems.
[SOURCE: IEC 62477-1:2022, 3.56, modified – "System consisting of" replaced with "one or
more" in the definition and Note 1 to entry added.]

3.7
PECS/CCR
series circuit power supply belonging to either base class
3.8
main transformer
transformer used for transferring energy and providing galvanic isolation between the mains
input of the PECS/CCR and the series circuit
3.9
local control
controlling functions affecting the output and thereby the AGL fixture brightness levels within
the series circuit power by the PECS/CCR from within the immediate vicinity of the PECS/CCR
(implemented on the PECS/CCR, or on a separate control device within the same substation in
which the PECS/CCR is installed) in order to allow a direct supervision and intervention only by
the operator acting on the device
3.10
remote control
control equipment which can alter the output state of the PECS/CCR and thereby the AGL
lighting fixture brilliancy and which is located remotely from the substation where the
PECS/CCR is installed, typically from the airfield control tower
Note 1 to entry: Remote control can be implemented by parallel wiring switched in response to airfield control tower
changes or via serial communications using a fibre optic or copper wire cable between the tower and the remotely
located equipment.
4 Classification
4.1 Base classes
The PECS or CCR shall be classified into one of the following base classes:
• General PECS for AGL systems
– The general PECS for AGL systems may control the AGL fixture brightness via stabilized
series circuit primary effective current. The AGL fixture brightness level may be
independent of the effective current in the primary series circuit and controlled through
a different information exchange mechanism.
• CCR for 6,6 A AGL systems
– The 6,6 A system CCR shall control the brightness levels of the AGL fixtures via
stabilized series circuit RMS current with precisely defined maximum current. The 6,6 A
CCR category closely follows the definitions from IEC 61822:2009 and is capable of
operating both halogen bulb and LED based AGL systems.
4.2 Voltage classes
The PECS/CCR shall be classified into one of the following categories based on the maximum
available output voltage:
• Low-voltage PECS/CCRs
– The rated system and output voltages of a low-voltage PECS/CCR shall not exceed
1 000 V AC.
• High-voltage PECS/CCRs
– The rated system and output voltages of a high-voltage PECS/CCR may be over
1 000 V AC, but shall not exceed 5 000 V AC.
NOTE 1 Within this document, the term "high voltage" refers to voltages greater than 1 kV. In other contexts, this
voltage range is often referred to as medium voltage.

– 10 – IEC 61820-3-2:2023 © IEC 2023
NOTE 2 For safety electrical low-voltage and protective extra-low-voltage circuits, refer to the dedicated standard
IEC 61820-3-4.
NOTE 3 The DC voltage definition of V2 in IEC 61820-1 is not applicable for series circuit systems.
4.3 Construction classes
The PECS/CCR shall be classified into one of the following categories based on the mechanical
construction:
• Self-contained PECS/CCR
A self-contained PECS/CCR is defined as a unit with all its components integral to one
individual and purpose-built housing. The self-contained unit takes an input power supply
and converts this to a series circuit primary current to power and control AGL fixtures. The
complete process of power conversion takes place within the housing of the PECS/CCR
with the input and output defined within this document. Self-contained PECS/CCRs are
typically delivered to the end user in its final form.
• Switchgear assemblies
A switchgear assembly is defined as a PECS or CCR consisting of an assembly of sub-parts
or modular parts. The complete assembly takes an input power supply and converts this to
a series circuit primary current to power and control AGL fixtures. These assemblies consist
of parts or modules that perform a subtask of process of the power electronic conversion.
The switchgear assembly can be used to separate low-voltage and high-voltage parts
physically in different enclosures or rooms. Switchgear assembly parts or modules are
typically connected and mounted by the end user to finalize the assembly.
The degree of interoperability of CCRs and PECS is defined by a reference to a specific primary
AGL series circuit system. The 6,6 A AGL system is an example of such a system.
5 Requirements
5.1 General
The following requirements are grouped into five categories: environmental, functional,
performance, design requirements and protection against electric shock.
5.2 Environmental requirements
5.2.1 General
The environmental condition classifications follow the definitions given in IEC 60721-3-3.
5.2.2 Environmental conditions
A PECS/CCR designed for continuous indoor operation without derating, shall follow the
provisions for environmental conditions of either class E20 or class E21, as defined in
IEC 61820-1:2019 and under one of the following temperature ranges:
• indoor temperature range: from +5 °C to +40 °C (class 3K3);
• normal temperature range: from +0 °C to +50 °C;
• extreme temperature range: from −40 °C to +55 °C (class 3K7 with 3Z11).
If the temperature range of the equipment is not explicitly specified, the PECS/CCR shall be
designed for operation under the normal temperature range.
A PECS/CCR designed for outdoor use shall follow the provisions for environmental conditions
of class E10, as defined in IEC 61820-1:2019.

A PECS/CCR following the climatic conditions of class 3K3 may be designed to operate in
altitude conditions from sea-level to 1 000 m. The limited altitude conditions of 1 000 m shall
be explicitly mentioned in the documentation.
A climate-controlled environment is recommended for PECS/CCR installations.
NOTE For PECS used externally, a specific temperature range can be defined if it is clearly mentioned in the
product documentation.
5.2.3 Electromagnetic compatibility (EMC)
5.2.3.1 Limits for emission
The PECS/CCR shall comply with IEC 61000-6-4, the EMC generic emission standard for
industrial environments. Radiated emission limits shall be in accordance with CISPR 11,
class A.
5.2.3.2 Limits for immunity
The PECS/CCR shall comply with the EMC immunity requirements of IEC 61000-6-5 for
substation, interface type 2.
5.2.3.3 Limits for harmonic current emissions on the PECS input
If specified in the data sheet, the emitted harmonic current should be stated in terms of
IEC 61000-3-2 and IEC 61000-3-12. Where possible, a 3-phase mains input should be used to
improve the harmonic content on the input current of the PECS/CCR.
5.3 Functional requirements
5.3.1 Input voltage
The rated input voltage to the PECS/CCR shall be in accordance with IEC 60038. The
PECS/CCR shall tolerate input voltage frequency changes up to ±7,5 % from the nominal value.
The PECS/CCR shall be designed to withstand momentary increases of voltage up to 120 %
and momentary decreases of voltage down to 80 % of the nominal input voltage without being
de-energized or damaged by such voltages. The PECS/CCR shall withstand such voltage
excursions for up to 50 ms within a 1 min period. The PECS/CCR shall automatically resume
normal operation when the input voltage returns to 90 % to 110 % of the nominal value.
5.3.2 Power ratings
The PECS/CCR can be manufactured in the following output power ratings:
1 kVA; 2 kVA; 2,5 kVA; 3 kVA; 4 kVA; 5 kVA; 7,5 kVA; 10 kVA; 15 kVA; 20 kVA; 25 kVA; and
30 kVA.
Greater power ratings than those specified in this document can be used to meet existing circuit
requirements. In this case, the PECS/CCR should meet the applicable performance,
qualification and safety requirements contained in this document.
5.3.3 Brightness level control
The PECS/CCR shall be capable of controlling the AGL fixture brightness on at least three
different illuminating levels. The steps shall correspond to the brightness levels required. If the
'step 0' exists, it shall correspond to no light output.
NOTE Five brightness levels are common, but additional brightness levels can be used.

– 12 – IEC 61820-3-2:2023 © IEC 2023
5.3.4 Remote interface communication
5.3.4.1 General
The PECS/CCR shall be capable of being controlled from a remote location allowing integration
into an airfield lighting control system. All pre-set brightness levels of the PECS/CCR shall be
selectable through the remote control. Feedback shall be available regardless of whether the
PECS/CCR is in local or remote-control mode.
5.3.4.2 Remote control and monitoring functions
The PECS/CCR shall provide at least the standard functions listed in Table 1. Additional control
and monitoring functions can be provided.
Table 1 – Remote control and monitoring functions
Control
Standard Optional
On/Off selection Non-illumination step (NVG – night vision goggles) or
black heat selection
Brightness selection Circuit selector switch
Monitoring
Standard Optional
On Non-illumination step obtained
Local/remote Circuit selector feedback
Brightness 1 obtained Circuit selector fault
Brightness 2 obtained Lamp fault warning
Brightness 3 obtained Lamp fault alarm
Brightness 4 obtained Earth fault warning
a
Earth fault alarm
Brightness 5 obtained
Brightness out of range Lamp fault detection level
Open circuit trip Earth fault detection value
Over current trip Input readings
Output readings
PECS/CCR status parameters
PECS/CCR errors
a
Three and five brightness levels are common, but additional brightness levels can be used.

5.3.4.3 Network interfaces
The PECS/CCR may be controlled and monitored through a network interface. It can also be
possible to combine parallel and serial or network interfaces. It can be possible to control the
PECS/CCR control through parallel wiring while monitoring is available through serial or a
network interface.
The data availability on the network interfaces shall be no less than that specified under
standard in Table 1. The interface may allow more elaborate interfacing for control and
monitoring to improve integration into a higher system.
Execution of mandatory commands and provision of feedback by the PECS/CCR shall be within
1 s.
Optionally, the network interfaces can be available redundantly.
5.3.4.4 Parallel interface
Remote control power can be provided from a source either external or internal to the
PECS/CCR.
Control and monitoring of the PECS/CCR shall be isolated through relays or other devices rated
at minimum 60 V DC and 50 mA. The rating can be increased to a higher voltage if required.
Remote control and monitoring cabling shall be connected through terminal blocks or
connectors with a minimum voltage rating of 300 V. These shall accommodate cables with a
2 2
cross-section ranging from 0,250 mm to 2,500 mm .
The data availability on the parallel interface shall be no less than that specified under standard
in Table 1.
5.3.5 Field circuit isolator
The PECS/CCR may contain an integral isolating device to allow the isolation of the outgoing
field cables for the purpose of load disconnection, cable insulation resistance testing, and
ground search capability. When operated, the device shall short out the PECS/CCR output
terminals and provide access for instrument connection to both of the load side terminals. If the
PECS/CCR is equipped with a field circuit isolator (FCI), a facility shall be provided for earthing
the primary series circuit.
NOTE Other parts of the IEC 61820 series can cover field circuit isolators.
5.3.6 Output performance and regulation
5.3.6.1 Functional requirements specific to general PECS for AGL systems
The PECS manufacturer shall undertake a proper technical analysis, taking into account the
applicable requirements for 6,6 A CCRs, to determine the critical parameters and the
acceptable limits that will affect the following performance of the AGL for systems, in particular
concerning:
• accuracy of the light output when stabilized;
• time for stabilization between transition between two brightness steps;
• start-up and shutdown time;
• minimum or maximum load limitations;
• misbehaviours during the start-up or shutdown time that can drive to unacceptable light
reaction (flicker, perturbing light intensity transition,…);
• behaviour during input power loss (as defined in 5.3.7.4).
This analysis shall demonstrate that the performance of the PECS when operated in a relevant
AGL system is equivalent to the performance required from a CCR for 6,6 A AGL systems.
These values shall be clearly visible in the documentation of the product delivered to the end
user.
Appropriate testing of these parameters shall be performed and documented as part of the
compliance to this document.
Generally it can be considered that the PECS control the brightness of the AGL fixtures via
brightness control messages. The messages can for example be in the form of effective
amplitude of the primary circuit current.

– 14 – IEC 61820-3-2:2023 © IEC 2023
It is important to consider the current dynamics of the PECS and the specific limits of the chosen
AGL system. The parameter values (especially related to output current) can significantly differ
from those of the 6,6 A systems and it is therefore important to inform the user about their
expected values and the functionality of the system in abnormal situations.
5.3.6.2 Nominal output current range and tolerances specific to the 6,6 A CCR
A 6,6 A CCR shall produce a maximum rated RMS current output of 6,6 A and a minimum rated
RMS current output of 1,7 A. A 6,6 A CCR shall be classified according to the number of output
current steps available, as follows:
• Style 1: three brightness steps between 4,8 A RMS and 6,6 A RMS;
• Style 2: five brightness steps between 2,8 A RMS and 6,6 A RMS.
Each brightness step shall correspond to a single current value within the full range.
Table 2 gives the standard pre-settings of the CCR. These settings may be varied according to
the requirements of an airport.
Table 2 – Standard 6,6 A CCR output current step pre-settings
Style Intensity step Nominal output current
A RMS
3 6,60
1 2 5,50
1 4,80
5 6,60
4 5,20
2 3 4,10
2 3,40
1 2,80
A tolerance of ±0,1 A for each current step setting within the output current range applies. The
6,6 A CCR shall implement the light intensity levels with RMS current outputs according to
Table 2.
NOTE An additional low current step(s) for non-illumination purposes can be offered as an option (see 5.3.8.6).
Each style CCR can be configured to operate with a reduced or increased number of current steps.
5.3.6.3 Regulation – Current step dynamics specific to the 6,6 A CCR
The 6,6 A CCR shall stabilize the output current at any selected current step within 500 ms and
shall hold the output current stable within the specified tolerance of the nominal output current.
There shall be no interruption of output current to the series circuit when switching from one
current step to another.
NOTE The current step dynamics of a PECS can differ from those defined for a 6,6 A CCR.
5.3.6.4 Regulation – Resistive loading specific to the 6,6 A CCR
While powering any resistive load between no load (short circuit) and full load, the CCR shall
provide an output current within the specified tolerance for each current step setting within the
nominal output current range, specified in 5.3.6.2.
CCRs shall provide regulation over the full range of environmental conditions specified in 5.2
and within the input voltage range according to IEC 60038.

5.3.6.5 Regulation – Reactive loading specific to the 6,6 A CCR
The CCR shall maintain the current within the specified tolerance for each current step setting
within the nominal output current range when the load has an inductive power factor of 0,60.
5.3.6.6 Load matching specific to the 6,6 A CCR
CCRs shall match connected loads from 50 % to 100 % of the rated load.
For resistive loads in the range of 50 % to 100 % of the rated load, at the rated input voltage,
and with an output current at 100 %, the efficiency and power factor shall not be less than the
values specified in 5.4.1 and 5.4.2. Additional output load taps may be provided to allow a more
precise adjustment or lower load matching.
5.3.6.7 Output current surge limitation s
...