PIR detection & lighting system – SAINT NICHOLAS SCHOOL, Brazil case study
The Saint Nicholas School in Alphaville, São Paulo, is an international educational institution for pupils between the ages of 18 months and 18 years. Read here how Finder provided a lighting system within the school including PIR detection.
Energy-saving with personalised features - The challenge
In virtually every public institution the issue of energy-saving has to be addressed. No more so than when it comes to large buildings with a continuous flow of people and varying occupancy. In the case of the Saint Nicholas School hosting such a large group of pupils, the need was particularly acute, so it was decided to install Finder’s 18 Series for PIR detection and 11 Series light dependent relays.
A student friendly solution - The solution
How do you solve the challenge of wasting energy, which can happen so easily just by simply forgetting to turn the lights off? Firstly, we used an 11 Series light dependent relay to block the energizing of the lighting when the ambient light level was ok. In addition, a Type 12.51 time switch was used to limit the functioning of the lighting to the hours when the school was active, whilst retaining the option to switch the lighting on or off manually through the use of a Type 13.61 electronic step relay. In the classrooms and canteen, a special solution was developed. The Type 18.51 PIR movement detectors were used to operate the lighting, but pre-set to operate only when they detected that the level of natural light present in the room was insufficient. As a further measure, the PIR detection components were pre-set to turn the lighting off should no movement be detected beyond the pre-set time. In this way, it was possible to reduce energy wastage by restricting lighting to when it was needed.
The 11 Series comprises light dependent relays (twilight switches) for controlling lighting according to the ambient brightness level – supplied with a separate photosensitive sensor.
These devices include the following features (according to Type):
- 1 contact
- 35 m wide
- 230 V AC, 24 V AC/DC version also available
- 35 mm rail (EN 60715) mount
The Finder 13 Series is a range of electronic step relays, call and reset relays, monostable relays, and the multi-function YESLY relay. Features of these devices include (according to Type):
- 35 mm rail (EN 60715) mount, panel mount or mounting within residential switch boxes
- 1 or 2 contacts
- Call relay with reset command
- Longer mechanical and electrical life, and much quieter than electromechanical step relays
The Finder 18 Series is a range of 14 movement and presence detectors in both indoor and outdoor versions, for ceiling and wall mounting.
Features of these devices include (according to Type):
- Small size
- Twilight sensor and delay time
Versions with DALI interface and KNX interface are also available.
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