Sogn og Fjordane Highways
Telea cuts energy costs for Norwegian Road Authority with 30% saving
Radio frequency (RF) has become an increasingly popular method of controlling road lighting, particularly where energy savings and flexibility are required. In place of a photocell, an RF controller is fitted into the road lantern so that instructions are transmitted wirelessly to a base station (typically mounted in a nearby switch cabinet) and central management server.
The Norwegian Road Authority decided on this method of control when lighting the E39 and RV15 highways in the western county of Sogn og Fjordane. Because of their growing use of controls, the Authority asked Thorn to provide a lighting system which would minimise energy use, provide flexibility and be capable of easy installation. The project consists of 144 Oracle lanterns, with 150W HPS lamps, controlled by a Telea remote monitoring system.
The responsiveness of the step dim RF controllers has allowed the light level to be reduced down to 40% during quiet traffic periods, except for pedestrian crossings where the area is always fully lit, achieving a 30% drop in electrical load. At the same time, the system offers the flexibility to create and recall scenes, as a whole or for an individual lantern, for instance if an accident occurs or for maintenance purposes. Because Telea operates autonomously at a lighting point level, it ensures normal operation in the event of a communications failure.
The installation was carried out by Sunnfjord Energi and Mesta Nordfjordeid.
