French Street Lighting System Cuts Energy Use with Lonworks® Network

® FRENCH STREET LIGHTING SYSTEM CUTS ENERGY USE WITH LONWORKS® NETWORK

REDUCE ENERGY USAGE BY 35%

Key Benefits The Challenge In an effort to reduce energy use in the • Energy use has been Sénart en Essonne, a fast-growing area four-city Sénart en Essonne area, the town reduced by 35% 35 km south of Paris comprising four council set an ambitious goal for its street cities, has a street lighting network of lighting system: It aimed to save 35% on • Lower operating and about 3,500 streetlights. The town council energy use each year, thereby reducing maintenance costs. wanted to reduce the area’s energy use its annual carbon emissions by an average by 35% to significantly contribute to its of 300 tons. The council also wanted to • Increased lighting sustainable growth plan. The council also contain its operating budget and reduce quality and hoped to lower its operating budget and its maintenance costs, while keeping the maintenance costs while increasing road streets safe and easy to navigate. efficiency safety. • The streetlight network To meet its goal, the council partnered with The Solution SPIE, one of the largest streetlight mainte- can be leveraged as a nance companies in France, with respon- communication net- The town council partnered with SPIE, one sibility for roughly 500,000 streetlights of France’s largest streetlight maintenance throughout the country. SPIE worked with work to collect data companies, to install an intelligent network Echelon to propose a solution based on from environmental based on Echelon’s LONWORKS technol- LONWORKS technology, an open, exten- ogy and SPIE’s CityNetworks software. The sible architecture that lets control devices sensors and support system uses electronic dimmable smart from multiple manufacturers interact with other M2M ballasts to dim the lamps when appropri- each other. The solution dims streetlights ate, extend lamp lifetime, automatically when there are fewer cars on the road, applications identify lamp failures, and enable remote automatically identifies failed lamps, and control in real time.

www.echelon.com enables real-time control to reduce onsite Remote operation and automatic failure operations. It also increases light quality detection have helped SPIE reduce costs by using electronic dimmable ballasts that in several ways. Before the new system drive the lamps more efficiently and make was installed, it could take up to 15 days them last longer. to identify a lamp outage. Now, failures are identified almost instantly. And since maintenance teams no longer need to Putting the Pieces Together patrol for outages at night, they spend less The streetlights are equipped with a Philips time driving, need fewer cars, and emit less Starsense light controller that embeds CO2. Customer service is less expensive, an Echelon power line transceiver and too, since SPIE now receives fewer calls drives an electronic dimmable ballast and from citizens reporting lamp outages. high-pressure sodium (HPS) lamps. The Starsense controller governs the operation “Our maintenance teams anticipate prob- of the ballast and also identifies failures, lems and diagnose them before citizens triggers alarms, and takes real-time mea- even know about them,” says Daniel surements of energy use, number of hours Labanowski, Director of Business Develop- burned, voltage, current, power factor, and ment at SPIE. The system is designed for power usage. The streetlights are connect- flexibility and supports hardware compo- ed to Echelon SmartServer systems, which nents from many different manufacturers. send On, Off, and Dimming commands to The council isn’t obligated to use a single the controllers over the existing power line brand of smart controllers or smart bal- cables. The SmartServers then send this lasts; it can choose from a number of solu- data via a GPRS network to the central tions. That way, the system can continue CityNetworks monitoring software, which to grow by adding the most cost-effective is hosted by SPIE. components.

The CityNetworks software gives SPIE an Labanowski calls the system a model for overall view of the streetlight system and others municipalities to follow. makes it easy to manage its operation. The software automatically aggregates and “With this solution, the Sénart en Essonne records data from many SmartServers, area has met its goal of reducing energy without manual intervention. The sys- costs by 35% a year,” he says. “It is a tem- tem’s On/Off commands are based on the plate for other cities looking for ways to SmartServer’s astronomical clock, and the support sustainable development.” dimming commands follow scenarios that are easily programmed into the CityNet- works software. The Customer Town Council of Sénart en Essonne Reaping the Benefits Sénart en Essonne, France Automatic dimming makes it possible to http://www.senart-essonne.com vary light brightness according to time of day. During rush hour, for example, the streetlights are set to an 80% brightness The Integrator level, but are dimmed to 60% otherwise. SPIE In some areas, the lamps are dimmed to Cergy-Pontoise, France as low as 40% between 11 p.m. and 5 a.m., www.spie.com with no discernible impact on visibility. When a lamp fails, maintenance operators can be notified by an alarm on their cell phone or via e-mail. Operators can check status by accessing the CityNetworks Web portal, which is available anytime, anywhere, via a secured access network. Using the portal, operators can diagnose failures and compile lists of older lamps in the surrounding area, so multiple lamps can be replaced on a single service run. The Web Portal also lets operators control the lamps remotely, and lets them perform efficiency checks to monitor energy and CO2 savings.

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