108 | URBAN
time
0
+6
-2
light
level
100%
50%
time
0
+6
-2
light
level
100%
50%
RPA
RPP
The technical and conceptual changes that have taken place in the public lighting
sector to achieve greater energy savings have also included the concept of “light only
when needed”. In fact, the standards establish that the technical lighting levels must
adapt to the traffic changes during night hours, implementing reductions of the
luminous flux if necessary.
To meet these needs, Performance iN Lighting offers a complete range of flux
regulation systems, both standalone and for centralized systems, which can be
configured in relation to the customer’s needs.
LIGHT ONLY WHEN NEEDED
The fixtures equipped with RPA (automatic power reducer) power supply feature a
standalone flux regulator since no additional wiring is required and the dimming
profiles (up to five) are pre-programmed in relation to “virtual midnight”, in other words,
the intermediate time between the switching on and switching off of the fixtures,
calculated during the first three days the system is in operation.
Example: let’s suppose that, during a certain period of the year, a system is on from
5:00 pm to 6:00 am the following day for a total of 13 hours. The virtual midnight will
coincide with 11:30 pm (13 hours ÷ 2 = 6.5 hours, therefore 5:00 pm + 6.5 hours =
11:30 pm). The Performance iN Lighting factory setting provides 50% dimming from
two hours before to six hours after virtual midnight. Considering these parameters, the
fixtures will be dimmed 50% from 9:30 pm (11:30 pm + 2 hours) to 5:30 am (11:30 pm +
6 hours) on the following day.
Virtual midnight is periodically updated to adapt to the seasonal changes of how long
day and night last, allowing the system to be switched on and off with a twilight switch.
The fixtures equipped with RPP (power
reduction with pilot command) power
supply have a feature which, using
dedicated wiring (the “pilot wire”),
allows the flux to be reduced to a pre-
programmed level (the factory setting is
50%).
Applying mains voltage to the pilot wire,
the fixture is dimmed to the preset value,
otherwise it operates at 100% of the
luminous flux. By changing the fixture’s
programming, this operating logic can
be inverted. The product will operate at
100% when the pilot wire is powered and
dimmed when it is not.
