Sparks Electrical News March 2015

lighting 18

Light when you need it

manually switched on and automati- cally switched off when the person leaves the area. For enhanced flexibility, switch sensors can be combined with room controllers tomanage a number of lighting and ventilation 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 pre-set light level. Once the sensor and controls have been selected for each installation, Legrand offers a choice of local BUS/ SCS control or the global BUS/KNX solution for lightingmanagement. BUS/SCS (simplified cabling system) wiring enables local and remote presence and light level detection andmanagement. Every installation, which also includes time and scenario management functions, is designed, monitored and supervised on a PC, us- ing Legrand’s advanced software. As an addition to this local control system, the wireless Radio/ZigBee system can be used to install new ra- dio control points, without damaging walls. This system is ideal for refurbish- ment installations or glazed surfaces. In addition to BUS/SCS, BUS/KNX wiring enables supervision and inte- gration of other building applications, including emergency lighting, HVAC and fire alarms. This building control system enhances energy and operat- ing performance, also ensuring ease of maintenance. Enquiries: +27 11 444 7971

mend a number of solutions tomaximise energy savings and to ensure absolute comfort for occupants of the building.” Legrand’s lightingmanagement sensors are used tomonitor the detec- tion area for occupancy and to control lighting and HVAC circuits. Lighting is automatically switched on when a person is sensed. Where sensors are equipped with a built-in light level sensor, the lighting will be kept off when sufficient natural light is available. When the area is vacated, the lighting automatically switches off after a pre-set time delay. Motion sensors, with an automatic switch on/off facility, are recommended for areas with little or no natural light, for example in passageways, bathrooms and equipment rooms. Passive infrared (PIR) technology of mo- tion sensors detects occupancy up to 8m, by identifying the difference between heat emitted from the human body in motion and the background space. Lightingmanagement sensors - designed for shops, offices, healthcare buildings and warehouses - have a man- ual or automatic switch on/off, according to whether there is anyone present and the natural light level. These sensors have built-in adjustable lux sensors that keep the lighting switched off if there sufficient natural light. Detection of lightingmanagement sensors is based on PIR technology and dual technology (DT) which ensures maximum sensitivity and coverage in applications for optimum reliability and energy saving. Legrand sensors work in occupancy mode, where are lights are automatically switched on or off accord- ing to occupancy, or in vacancy mode for additional energy saving, where lights are

Legrand’s lighting and motion management systems reduce the amount of time lights are left on unnecessarily, saving hours of wasted electricity each day.

The Legrand PIR ceiling mounted lighting management sensor, with 180° infrared detection, is ideal for passageways

LEGRAND’S lighting andmotionman- agement systems, which are designed tomake industrial, commercial and do- mestic buildings more energy efficient, encompass switch sensors that reduce the amount of time lighting is left on unnecessarily. “Lighting, together with heating and air-conditioning, accounts for the great- est energy consumption and electric- ity costs of a building,”says Luk Ivens, general manager, Legrand Southern Africa.“With the installation of an auto- matic lighting andmotionmanagement system, which ensures there is exactly the right amount of light when and where it is needed, energy savings of up to 60% can be achieved. Reduced lighting usage not only lowers operating costs, but also helps decrease Green House Gas (GHG) emissions. Additional savings include reduced lamp replacement andmain- tenance requirements and lower power demand during peak hours. Because vari- ous areas in a building require different lighting control strategies, we recom-

Breakthrough the with DARKNESS

ELX210

PYN-14

ELX233A

Rechargeable Lantern

Rechargeable Night Light

Rechargeable Emergency Light

Cape Town Tel: 021 706 4215 Fax: 021 706 0864

KZN Tel: 031 266 5520 Fax: 086 750 7495

Free-State Tel: 082 400 7241 Fax: 086 693 3942 Chantel Human

JHB Tel: 011 614 5760 Fax: 011 618 3007 Willie Garbers

Nigel Cutting

Gordon Leech

willie@superlume.co.za

sparks

march 2015

ELECTRICAL NEWS