Electrical systems supplier Legrand has upgraded its lighting and motion management system to incorporate an additional dimming functionality, as well as a switch sensor, or motion management system, says sales manager Johan Bosch.
He tells Engineering News that the system’s new features ensure energy savings of up to 60%.
Legrand’s lighting and motion systems, which reduces the time the lights are left on unnecessarily, was first launched onto the market in 2012. Following research and monitoring of the system’s functionality, the company decided to upgrade the system in September last year.
Bosch says Legrand is committed to strengthening its market reach in South Africa, adding that the company is establishing independent departments to handle local lighting designs, technical support and service requirements.
Legrand Southern Africa GM Luk Ivens emphasises that, as lighting and heating, ventilation and air conditioning (HVAC) account for the greatest energy consumption and electricity costs in a building, Legrand’s automatic lighting and motion management system – which ensures that the right amount of light is available when needed – saves energy and is beneficial to the environment.
“Reduced lighting not only lowers operating costs but also decreases greenhouse-gas emissions. Additional savings include fewer lamp replacement and maintenance requirements, as well as lower power demand during peak hours,” elaborates Ivens.
About Legrand’s Lighting System
The lighting management sensors monitor the detection area for occupancy and control lighting and the HVAC circuits.
The lighting system automatically switches on when a person enters a room, and automatically switches off when the area is vacated, after a preset time delay. The system also comes with the option of a built-in light level sensor, which ensures that lights do not switch on when sufficient natural light is available.
Bosch adds that, for optimal efficiency, motion sensors with an automatic on/off switch facility are recommended for areas with little or no natural light, such as in passageways, bathrooms and equipment rooms.
Further, the system’s passive infrared motion sensors detect occupancy within a radius of up to 8 m by identifying the difference between heat emitted from the human body in motion and heat emitted from the background space.
The sensors, therefore, work in two modes: occupancy mode, which ensures that lights are either automatically switched on when someone is in the room or automatically switched off when the room is vacated; and vacancy mode for additional energy saving. The latter solution ensures that lights have to be manually switched on when a person enters an area, but automatically switch off when the area is vacated.
For enhanced flexibility, switch sensors can also be combined with room controllers to manage several lighting and HVAC circuits. For example, in areas where daylight is unevenly distributed, a sensor can be combined with a row of luminaires to measure motion and light levels. The dimming controller regulates each row of luminaires and supplements the external light to obtain the required preset light level.
Bosch says Legrand is further committed to providing integrated services, and to combining lighting management, energy measurement, emergency lighting, access control, surveillance cameras and HVAC into one supervision software, ensuring functionality for a building management system, which can result in cost savings.
French-founded Legrand is a global specialist in electrical and digital building infrastructure. The company established its South African subsidiary in 1985 and has developed a comprehensive distribution network across Southern Africa, which represents the group’s business interests in South Africa, Botswana, Malawi, Namibia, Zambia, Zimbabwe, Lesotho and Swaziland.
The company employs about 35 000 people and boasts a yearly turnover of about €4.5-billion. Legrand is present in more than 70 countries, with subsidiaries and representative offices. Further, almost two-thirds of the company’s sales include the supply of products – which rank first and second on the market – to France, Italy, the US, Brazil, Russia, India, China and Mexico, among others.
Legrand provides tailored products and services for the commercial, industrial and residential markets. Its services include control and monitoring installations, cable management, power distribution and voice-data-image system distribution.
The company also provides several solutions for managing lighting, heating, energy, networks and building access.