LED Approach Sequence Flashing Lights SFL800D.pdf

LED Approach Sequence Flashing Lights SFL800D

1. LED
Approach
Sequence Flashing
Lights
SFL800D

2. The Standards
•Annex 14 section 5.3.7 and 5.3.8 sets out the standards for Runway lead in
lights and Runway threshold identification lights. See also Aerodrome design
manual Part 4 visual aids chapter 6; for more information.
•FAA L-849 (AC 150/5345-51) and E-2628d
•Frequency of the flashing lights -Flashing lights should be white lights with a
frequency of 60/120 flashes each minute (ICAO Annex 14 Vol.. I / 5.3.8.3.)
•Intensity of the flashing lights -On the approach, the light intensity level of the
sequenced flash lights need to be compatible with the light intensity level of
the Runway lights.
•Sequence of flashing -When practicable, groups should flash in sequence
towards the runways
Flashing -Introduction
2
AGLPlus2 –Module 10: Flashing System

3. AGLPlus2 –Module 10: Flashing System
3
Flashing -Introduction
CommentsCAT IIICAT IICAT ISystem
XXXAPPROACH LIGHTS
XX-APPROACH SIDE ROWS
Between threshold and 300 m crossbar in CAT I onlyXXXFLASHING LIGHT SYSTEM
XXXRTIL
Maybe switchoff in CAT IIIN.M.XXPAPI
XXXTHRESHOLD
XXXEDGE OF RUNWAY
XX-RUNWAY CENTRE LINE
XX-TOUCHDOWNZONE
XXXRUNWAY END
XX-RAPID EXIT IDENTIFICATION LIGHTS
XX-RAPID EXIT TAXIWAY CENTRELINE
Optional inthe straight sections if taxiway centerline
installed
XXXTAXIWAY EDGE LIGHTS
X--TAXIWAYCENTER LINE
XX-STOP BARS
XX-LEAD-ON LIGHTS
XXXRUNWAY GUARD LIGHTS
X--INTERMEDIATE HOLDING POINT
XXXSIGN
XXXWINDCONE
Depends onthe airport environmentCOND.COND.COND.BEACON

4. Purpose of Flashing lights
•Flashing light = bad weather landing aid.
•On when:
-Range of steady-burning, @ full intensity,
insufficient to ensure adequate guidance.
-Under good visibility conditions to facilitate
location of the runway in urban areas
-Under good visibility conditions to show the
approach path to an airport located in a difficult
area (sea, mountains...)
→Flashing = multipurpose: 3-level system is
recommended (full-power of a 1-level system
could cause dazzling under good visibility)
Flashing -Introduction
4
AGLPlus2 –Module 10: Flashing System

5. Flashing lights may be used in:
•ICAO and FAA precision approaches
•Runway Threshold Identification Light
Systems (RTILS)
•Sequence Flashing Lights (SFL)
•Omni-Directional Approach Lighting
Systems (ODALS)
•Lead In Lighting System
Flashing -Introduction
5
AGLPlus2 –Module 10: Flashing System

6. Sequence Flashing Lights (SFL)
•Optional equipment (but strongly recommend)
The SFL system completes the axial steady burning approach
lights. Spacing between each unit is the same than the
spacing between the steady burning rows (60m or 30m)
-from the threshold till the end of the approach system
(runway with CAT I precision approach system)
-from the 300m crossbar till the end of the approach
system (CAT II/III)
•SFL is made with capacitor discharge fittings (HV-2000V or
LV-400V)
•Each light shall be flashed twice a second in sequence,
beginning with the outermost light and progressing toward
the threshold to the innermost light of the system.
•The design is such that these lights can be operated
independently of the other lights of the approach system.
Flashing -Introduction
6
AGLPlus2 –Module 10: Flashing System

7. Configurations -ICAO Simple Approach Lighting System
Steady Burning Approach Light
Sequence Flashing Light
ICAO REFERENCES: ANNEX 14 –VOL 1
ATTACHMENT A. FIG. A-5 AND §11.2 & 11.3
30m
420 m
300 m
300m Crossbar
Threshold
Flashing -IntroductionAGLPlus2 –Module 10: Flashing System

8. ICAO REFERENCES: ANNEX 14 –VOL 1
PARA 5.3.4.10 to 5.3.4.21 AND
ATTACHMENT A. §11 AND FIG A-6 (B)
30m
900 m
300 m
300m Crossbar
Steady burning lights
Flashing Light
Threshold
Also called ALSF-1
Flashing -IntroductionAGLPlus2 –Module 10: Flashing System

9. ICAO REFERENCES: ANNEX 14 –VOL 1
PARA 5.3.4.22 to 5.3.4.39 AND
ATTACHMENT A. §11 AND FIG A-6 (B)
30m
900 m
300 m
300m Crossbar
Steady burning Approach Light (white)
Flashing Light, including RTILS ( REILS )
Threshold
150m Crossbar
Steady burning Side Row Barrettes (red)
Also called ALSF-2
AGLPlus2 –Module 10: Flashing System Flashing -Introduction

10. F.A.A Runway Threshold Identification Light Systems(RTILS)
The threshold may have two additional capacitor discharge luminairesinstalled. The
objective of these is to provide the pilot with information regarding the start of the runway.
The circuitry of the system is such that should one unit fail, then the other is prevented
from operating.
AGLPlus2 –Module 10: Flashing System Flashing -Introduction
12 m*
Threshold
12 m
15°
15°
Flashing Light
With PAPI = 22,5 m
*
Threshold Light Threshold Light
Vertical Setting Angle
10°10°

11. •Scope of Application
•System Design and Functions
•Wiring diagrams
•Control Unit
•Flashing lights
•Customer benefits
Content

12. Scope of
Application

13. AGLPlus2 –Module 10: Flashing System
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•The SFL800D serves as approach sequential flashing light system and runway
threshold identification flash lights (RTILS) on airports.
•The high intensity flashes enable to the pilot already from far distance to
recognize the runway and marks the active landing direction.
•The threshold identification lights indicate the begin of the runway.
•The system supports two different flash frequencies (1 / s or 2 / s).
•3 intensity steps allow the adaptation to the actual metrological view.
Scope of Application

14. System Design and
Functions

15. Principle Cabling
•The Control Unit placed in a sub-station supplies the flash system via a
single power cable.
•The communication between the Control Unit and the flashes is achieved
on separate wires of the same power cable.
TE
TE
32
31
Systemaufbau
System Layout
Steuereinheit
Control Unit
COMRemote Control
400 V 50/60Hz
Local Control
Überspanuungs
-schutzeinheit
Over Voltage
Protection Unit
TE
3
TE
2
TE
1
TE
n
Slave
TE
m
Control Unit
Overvoltage
Protection
Unit
System Layout
Inset lights may be installed by pairs
to increase the photometric
performances
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AGLPlus2 –Module 10: Flashing System

16. Components
The sequence flash system consist of:
•Control Unit with the power and
communication interface to
the field components
•Power Distribution Unit to feed
the single flash light heads with
SELV power and communication
•The flash lights (elevated or 12” inset)
with the high power LEDs and
the control electronics.
Note: the inset lights may be installed by pairs
AGLPlus2 –Module 10: Flashing System
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17. AGLPlus2 –Module 10: Flashing System
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Power Supply to the flashing lights
•400 V / 50 Hz or 60 Hz power supply voltage on two wires of the supply cable.
•The Power Distribution Unit transforms that voltage down to 36 VAC supply
voltage for the flash lights. The safe separation with the extra low voltage level
provides a Safety Extra Low Voltage (SELV) with the highest work safety.
Data communication to the flashing lights
•Control and monitoring by two other wires of the supply cable.
•The control unit sets the required intensity level and the system configuration
of the entire system.
•Individual address of the flash head defines the time of ignition.
•After ignition each flash light sends automatically the actual status to the
control unit.
•A pair of combined inset lights consists of a master and a slave unit. The
function is defined by the internal configuration. Only the master
communicates with the control unit.
Power and communication to the lights

18. Wiring diagrams

19. Principle Wiring Diagram and Voltage Levels
E.g. for elevated light with breakable coupling
Safety Extra Low
Voltage
(SELV)
< 50V
400 VAC
Control Unit
Overvoltage
Protection
Unit
Cable
joint
Power
Distribution
Unit
Cable joint
Connector
of the
light
•2 wires for power (400V)
•2 wires for control and
monitoring
HO7RN-F
4-core cable
(e.g. for electrical
frangibility
on approach masts)
Optional
connector
( =
separation
transformer)
(contractor-
made)
(contractor-
made)
AGLPlus2 –Module 10: Flashing System

20. E.g. for inset light as single and paired type
Safety Extra Low
Voltage
(SELV)
< 50V
400 VAC
Principle Wiring Diagram and Voltage Levels
HO7RN-F
4-core cable
Cable
joint
Power
Distribution
Unit
Cable joint
Inset
light
Connector
Power
Distribution
Unit
Cable joint
Master
inset
light
Connector
Slave
inset
light
H-
connector
AGLPlus2 –Module 10: Flashing System
Principle Wiring Diagram and Voltage Levels

21. Control Unit

22. AGLPlus2 –Module 10: Flashing System
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•Input: 400 V 3 phases
•Output: 4-core cable –2 wires for power (400
VAC), 2 wires for communication
•Interface to remote Control and Monitoring
System (CMS) via parallel or serial interface.
•Local control for the basic functions.
•Detailed maintenance and configuration of the
system can be done over an external
maintenance computer with the optional service
software lucDMC.
Control Unit

23. AGLPlus2 –Module 10: Flashing System
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•Local control for maintenance purposes on
the internal control module
•5 push buttons to select function (TIL, SFL,
flash frequency...) + 1 rotary switch for
brightness and remote/local control
•9 LED indications show the actual
status of the system.
Local Control and Monitoring
Note:
The use of the internal local control
should be limited to trained electricians.
With opened Control Unit the suitable
safety regulations must be applied!

24. AGLPlus2 –Module 10: Flashing System
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•Parallel (multiwire) interface with in-and
outputs on 24 VDC level.
•2 redundant CAN-Bus ports
•For an optional serial interfacing with any
other CMS brand the following interface can
be provided on request:
-RS-485 (EIA-485) MODBUS/RTU, RCOM,
RCOMplus
-ETHERNET MODBUS/TCP
-PROFIBUS DP
Remote Control Interfaces

25. Flashing lights

26. AGLPlus2 –Module 10: Flashing System
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Flashing lights are not specified
in ICAO Annex 14 or ADM
•However, it seems logical that
the beam dimensions should be the same
as steady burning lights.
•But what about the intensity?
Average intensity of 20,000 cd is
often excessive and produces glare.
FAA limits the intensity to a maximum of 20,000 cd, with a minimum of 8,000 cd for elevated
lights and 5,000 cd for inset lights. Many lights of this type installed worldwide.
•Ideal solution:
-Use the ICAO beam angles
-Average intensity for elevated lights: 10,000 cd to avoid glare (meaning peak intensity 
15,000 cd as most FAA lights)
-Inset lights should be approx. 60% of elevated lights as per FAA, as they are seen at shortest
distance.
Flashing lights –which photometric requirements?

27. AGLPlus2 –Module 10: Flashing System
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Elevated flash light
•The elevated type is available as
-as a standard light with 12,500 cd * nominal intensity.
-or a extra high intensity light with 20,000 cd *
for best far distance operation under low vis.
•Choosing the standard light helps to increase
the LED lifetime.
12” inset flash light
•The single inset light provides a nominal intensity of
6500 cd *.
•To increase the operational effective intensity, two
synchronized insets next to each other can be combined
to form a single point of light.
Flashing lights
*Typical values of the effective Intensity on the highest brightness step.

28. Customer benefits

29. Approach lighting is
different!

30. AGLPlus2 –Module 10: Flashing System
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Reduced maintenance thanks to
•The reliability and long life time of the LEDs (xenon flash tubes have a very short life)
•IP68 for all outdoor equipment, including the elevated lights
Customer benefits
This is extremely useful for approach lights
installed on masts, outside the airport perimeter,
above fields, roads or sea...

31. AGLPlus2 –Module 10: Flashing System
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Low power consumption: 20VA per light
Inexpensive and easy installation:
•Standard low voltage cable (HO7RN-F), of small diameter; typically:
-2,5 mm² from the Control Unit to the first light
-then 1,5 mm² to the end of the line
•Same 4-core cable used for both the power supply and the communication. No
separate bus.
•No individual electronic cabinet: only a simple transformer that can be installed
in a transformer pitSafety: SELV at the level of the lights, instead of 400 or 2000V.
Customer benefits