Technical information

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Absence dimming with Occupancy detectors and HF-ballast PCA ECO-lp
Occupancy detector
time setting
lux level
Occupancy detector
time setting
lux level
Connection for automatic control
between 100 % (occupancy) and 10 %
(absenteeism). The HF ballast PCA
ECO-lp recognises that these properties
are required and adjusts the standard
switchDIM function automatically.
The time can then be shortened on the
occupancy detectors to give maximum
functionality. Luminaires equipped with
e-Sense smartSwitch can be used in
combination with external occupancy
detectors.
If luminaires with compact fluores-
cent lamps are used, the luminaires
should be equipped with PCA EXCEL
One4all HF-ballasts. The same phase
to luminaires and sensors. A large
number of luminaires can be controlled
simultaneously as there is no output
via the relay function. Switching can be
controlled centrally, for example via a
time switch.
Dimming
Installation example switchDIM Corridor with absence dampening
Premises without natural daylight usually need the lighting to be
switched on continuously. However, in some cases some of the
luminaires can be switched o when no one is in the room. Light
control is ideal for corridors where the sucient basic light can be
quickly increased during occupancy. Energy savings can be up to 80 %.
Advantages:
Luminaires with Tridonic PCA ECO or Excel one4all. •
E-Sense luminaire with smartSwitch sensors can be used.•
HF ballasts learn the automatic function the first time it is used.•
External standard occupancy sensors can be combined in the •
system.
Proposal for the installation of control in the corridor
Lighting is usually continuously lit in corridors where people nor-
mally move around. Examples are hospital culverts and corridors in
large building complexes. Many installations have been made more
energy ecient by detecting occupancy and the movements of indi-
viduals and with that switching on the lighting when necessary. The
negative eect of this type of control is when you approach a dark-
ened room the reaction time of the sensor is then decisive for how
quickly the lighting is switched on. The combination of poor detec-
tion with the slow starting of the fluorescent lamp creates a scenario
where the user enters the corridor before the lighting is switched on.
Creating a feeling of displeasure and uncertainty. This can also have
a negative eect on the life of the fluorescent lamp. Short ignition
times result in lamp end blackening and a reduced life span.
If you know the lighting should always be on you can ensure that
the lighting is on at a high level with occupancy and then reduced
to a low energy-saving level awaiting the next detection. By regulat-
ing between high and low levels the cathodes are not consumed
and the life span of the fluorescent lamp is not negatively aected.
Absence dampening time delays can be as short as one minute to
regulate back to a low level.
The advantage of this type of control is that a central control unit
is not necessary. Occupancy detectors are connected directly to the
control input on the HF-ballast. After an on-pulse (occupancy) of
5 minutes the HF-ballast has changed function to adjust between
100 % with occupancy (230 V on the control input), and 10 % light
with absenteeism. If you know that the room/corridor will not be
used during certain parts of the day, for example in schools, you can
switch o the lighting completely with the help of central control.
See the wiring diagram below.
Product
Indigo Clivus with Tridonic PCA ECO-lp HF-ballast 24484-300
Indigo Clivus with Tridonic e-Sense smartSwitch 24484-309
External occupancy detector (see opposite page)
Light control in stairwells, corridors. The combination of smartSwitch sensors in the
luminaires and external occupancy detectors means that detection will be complete.
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