|
|
TECHNICAL INFORMATION |
X |
|
|
|
Type of Signs |
Section |
|
|
|
|
|
|
|
Emergency Lighting
System |
|||
|
|
|
|
|
Design
An emergency
lighting system can either be a power supply
(via UPS, inverter or direct current system) or consist of luminaires
with their own power supply, i.e. the luminaires have an integrated battery
and an emergency lighting unit. The
systems are usually called centralised respective decentralised systems.
In centralised
systems we recommend luminaires with electronic ballasts. This is to satisfy the reconnection demands
of 0.5s between normal to emergency operations.
The decentralised
system (self-contained) requires specially adapted luminaires. Solutions can
vary from luminaire to luminaire, as some components, for example batteries,
are sensitive to temperature. Some
luminaires need either the battery or the battery charger to be moved into
separate enclosures. These boxes may
be placed a maximum of 1 metre from the luminaire.
There are three main types of emergency lighting
installations
*
Evacuation
lighting i.e. emergency lighting that illuminates evacuation paths.
*
Information
lighting i.e. luminaires with text signs. * Anti-panic lighting, i.e. a general emergency lighting to reduce the risk of panic in the event of a power failure |
Connection
to the mains
Decentralised
emergency lighting luminaires should normally be connected using a 4-core
cable (protective earth, neutral, charge and ignition phases).
The above
connection means that the luminaire can be switched on and off as usual and
the emergency lighting operation kicks in with a power failure depending on
whether the luminaire is switched on or off. Charge respective ignition
phases should come from the same fuse box.
If the emergency
lighting luminaire is to only come on with emergency operation or if the
luminaire should constantly be on it is sufficient with a 3-core connection
cable.
Application
area
Emergency
lighting luminaires are intended for installtion in indoor environment
25°C. For outdoor installations,
parking decks etc,SLC recommend a centralised solution.
Luminous
flux with emergency operations
A decentralised
emergency lighting luminaire gives off a very limited luminous flux in
emergency mode. Usually this flow is
between 6-20% of the luminous flux provided with normal operations. In emergency mode only one lamp is active
irrespective of the number of lamps in the luminaire.
This must be
considered during lighting planning. For example , a high placed
decentralised emergency lighting luminaire in an industrial building with
high ceiling, would find it difficult to correspond to the demands of a requisite lighting strength in
emergency mode.
A centralised system may be more suitable for this kind
of installation. Virtually 100% luminous flux is obtained in emergency mode
from a centralilsed system.
Maintenance
An emergency
lighting system must be maintained.
The operation of
the luminaires must be tested each month.
This can be done via a brief power failure.
The emergency
operating time, which normally is 60 minutes, must be tested annually. All tests must be logged.
With too little
emergency operating times it may be necessary to replace the battery.
A battery has a
service life of at least 4 years. However, a longer service life is common,
as this is primarily determined by the temperature of the battery.
Range
Saudi Lighting can
provide decentralised and centralised emergency lighting designs for most of
our fluorescent lamp luminaires.
We principally
recommend luminaires with electronic ballasts due to reasons of temperature.
These ballasts can even be of those types that allow dimming. Operating times of 60 or 180 minutes in
emergency operating mode are available.
As luminaires
require different solutions due to reasons of temperature and space
(integrated, battery box or emergency lighting box) please refer to our
current emergency lighting range that is available in the catalogue.
Technical support can be obtained by calling in 00966 1 265 1010 |
||
