THE problem of a lack of space for power cables at a landmark London building has been solved by the use of Power over Ethernet.
Service voids at the Armitage building in Marylebone – a mixture of retail, apartments and self-storage – are too small for mains power cabling for the lighting, so engineers have specified a mix of PoE and LED lighting.
As LED is low voltage, data cables can be used to energise the luminaires rather than traditional bulky twin-and-earth.
The system was specified by Tuckers Consultancy and installed by R B Emerson Group.
The system used is the Prolijik Lightmatrix, which also enables integration with other building controls, in this case the door entry system. Storage clients can use their key fob for entry, with the key fob acting as a wireless controller for the lighting of the individual storage units.
Communal lighting is controlled by PIRs to illuminate areas as people enter them.
Lightmatrix combines plug-and-play data cabling with Dali standard features into a lighting control system. Energy consumption is reduced by about 11 per cent compared to a 240V system, and installation costs are reduced by about 30 per cent in a typical commercial building.
Power over Ethernet is the ability to deliver 48 VDC of power over the same copper cable as is used for Ethernet networks to drive low-power devices such as LED luminaires. With PoE, the lighting installation becomes a part of the computer network, and this facility can be used for both control and monitoring of the lighting, and the harvesting of data from sensors embedded within the light fittings.
- A special webinar on Power over Ethernet and lighting in association with Igor takes place on 20 September 2017. To register, email firstname.lastname@example.org.