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Customer application 27 August 2021

Bright Prospects on the Street

Street lighting is becoming an ever greater energy cost trap for towns and cities, since they are still using lighting technology from the 1960s. Efficient LED technology supplants mercury vapor lamps: The new Vulkan Series from Nordeon in Springe, Germany provides impressive evidence of the savings LED streetlights can achieve. Nordeon uses innovative connection technology from WAGO for component installation to tailor its modular lighting solutions perfectly to specific street conditions.

Street lighting has a real potential – particularly when the town coffers are empty. If cities and towns invest in efficient lighting technology, they can save up to 80 percent on electrical power, according to industry groups such as the German Electrical and Electronic Manufacturers’ Association (ZVEI). A quick glimpse at Germany makes the amounts involved clear: savings of 2.2 billion kilowatt hours, which, according to ZVEI, corresponds to 1.4 million metric tons of CO2 and 400 million euros on the electricity bill at a price of 18 cents per kW/h. Legislation to discourage use of inefficient technology is also a factor: First the familiar old incandescent bulbs became ineligible for CE approval, then mercury vapor lights followed in 2015.

The Vulkan Series from Nordeon

Modular Construction Kits for Perfect Lighting
Flexible Retrofitting
Innovative, Economical Technology
Durability

Modular Construction Kits for Perfect Lighting

LED streetlights are significantly more innovative and – what’s most important – economical . To make it as easy as possible for cities and towns to convert to this technology for reliably illuminating streets, parks and sidewalks, manufacturers such as Nordeon design their LED streetlights as modular product kits. These include everything required for the right power, illumination and retrofitting.

Introduced for the first time at the Light+Building 2016 trade fair, the company developed the V3610 model light for use in residential areas and side streets under the brand name “Vulkan.” The V3610 is available with three light output levels depending on the conditions of use and available space. For the different options, Nordeon simply scales the number of LED circuit boards. Up to three can be combined, forming an assembly consisting of 24 high-efficiency, high-power LEDs. Each module, equipped with eight LEDs, is based on a circuit board with an aluminum core that effectively dissipates heat losses from the LEDs through the light’s flat aluminum housing.

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“We anticipate a minimum service life of 100,000 hours,” says product manager Sascha Müller, adding that the service life is highly dependent on how much the prevailing temperature remains within the tolerance range during operation. The standard test is performed at 25 degrees. “In Germany, the annual average is just 10–12 degrees Celsius, which helps extend the service life.” As a rule of thumb, a decrease of 10 degrees Kelvin doubles the service life. Müller puts it simply: “Heat is often lethal for LEDs.”

Four cables are required to connect the LED boards: two for the positive and negative poles for the DC supply, as well as two more for the vitally important temperature monitoring circuit. “We’ve integrated temperature diodes into the modules, giving us the capability to measure the temperature of the LEDs in the light driver and keep it within the tolerance range,” says Müller. If it gets too hot, the light reduces the power or, if necessary, shuts off completely. Once the components have cooled down sufficiently, the lights switch back on automatically. Ultimately, operational reliability and longevity are the essence of this control concept.

Nordeon uses the 2060 Series SMD PCB Terminal Blocks, reworked by WAGO over a year ago, to connect the LED circuit boards to the drivers of these outdoor lights. Functionally, the term “driver” refers to the LED electronic ballast unit, which is responsible for the entire control of the lighting equipment, as well as the DC power supply delivering 24 volts per module. If two modules are connected in series, the voltage increases to 48 volts.