LIGHTING CONTROLS
a depth graduation that adjusts the lighting even better to the daylight and provides even greater energy efficiency. DUO DALI presence detectors and APC presence detectors for DALI-2 show how simple offsets can improve the use of daylight by constant lighting control in different ways. And all with just one detector, and therefore just one light sensor in the room. According to Core Distribution, this is a simple but effective concept that improves energy efficiency yet ensures that all zones have lighting in compliance with general standards. Particularly when using APC presence detectors with their multiple groups, this approach can also be implemented for rooms with windows on more than one side. The offset can be used to achieve energy efficiency even in rooms with windows on multiple sides. The flexible group formation of APC presence detectors makes this very straightforward.
groups and operates using an enhanced offset concept. APC presence detectors not only enable the use of a single offset between two lighting groups but can also provide a double offset. This is best demonstrated using a dimming curve (Fig. 4). As it shows, an upper offset can be set between group 2 and group 1 as well as a lower offset between group 2 and group 1. This double offset creates greater flexibility for the design process and further increases energy savings. More lighting groups = more offsets Another difference is that APC presence detectors allow even more lighting groups to be formed within a room than when using the DUO DALI, all of
which can then be controlled by a single presence detector. This also influences the offset concept of the APC detectors: additional double offsets can be set for each newly added group. Figure 5 shows an example: the same room, but now with three lighting groups. In addition to group 2 by the window and group 1 further away, there is now group 3 near the door. In the example, a double offset relative to group 1 is set for both the window group and the door group. A negative offset for the window group, and a positive one for the door group. As the level of daylight increases, the window group is dimmed earlier than group 1, while the door group is dimmed later than group 1. In a room with windows on just one side, this creates
About Core...
Award-winner Core Distribution is well renowned across Ireland for distributing high-quality products, such as the Esylux lighting controls and presence detectors, through their extensive network of electrical wholesalers to contractors. Dealing with specifiers and contractors to create demand, Core prides themselves on offering the best service possible. A large stock holding of close to €2M across their two bases means you can rely on Core Distribution to ensure quick delivery to every project across Ireland.
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