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FEATURE HAZARDOUS AREA EQUIPMENT


LIGHTENING THE LOAD WITH HAZARDOUS AREA LIGHTING


Equipment supplier, Turck Banner, looks at the benefits of using LEDs in hazardous areas


or to provide coloured illumination, for example red light at night. With eight length options and 750


n the not too distant past, the LED lighting revolution was driven largely by the universal acceptance of the effects of global warming and the need to save energy. Significant cost savings were realised with LEDs which prompted further adoption. Today, the benefits of LED lighting in standard applications are well known and in the world of hazardous area lighting such benefits are perhaps even more desirable. Old fashioned light bulbs consisted of a tungsten filament inside a glass bulb filled with an inert gas such as argon or nitrogen. When a current was passed through the filament it got very hot and gave off light. The tungsten filament would gradually evaporate over a period of time and eventually break. The problem with these incandescent bulbs was that they emitted a lot of heat for the amount of light produced, the ratio typically being about 80 per cent heat for only 20 per cent light and, as such, were not energy efficient. Halogen bulbs are similar in design to the old fashioned light bulbs and whilst they generally have a longer life span, they also generate a lot of heat which is wasted energy. Fluorescent lights are also guilty when it comes to wasting energy. A typical tube will produce 50-100 lumens per watt compared to an LED unit which produces 130 lumens per watt. At


I 26 APRIL 2019 | ELECTRICAL ENGINEERING


first glance, the gain in light output of an LED unit may not seem significant. However, LED lighting is directional, delivering the maximum amount of light to exactly the right position. Traditional lighting manufacturers often quote total light output figures for their devices, irrespective of direction. In practice, much of the light in traditional units is wasted. Furthermore, fluorescent lights are glass construction and contain mercury, which poses a health hazard should the tube be broken.


NEW HLS27 Supplier of hazardous area equipment, Turck Banner, has recently added to its portfolio with the introduction of the HLS27, a range of LED strip lights for hazardous areas. The HLS27 is a 12–30 volts DC powered


light, certified for gas and dust Division 2 locations. It utilises tough aluminium housings encased in a shatterproof, UV- stabilised, polycarbonate shell. Water resistant to IP67, the HLS27 is ideal for harsh indoor and outdoor applications such as cabinets, spray-booths and outdoor shelters. In addition to the classic cool white


models, the HLS27 is also available in single and dual colour models. Colours can be used for direct status indication, to supplement illumination with indication,


lumens per 30cm light output, the HLS27 easily replaces bulky, energy-hungry fixtures. In addition to the integral 50 per cent dimming option, models with a variable dimming input are also available for customisation of light levels. The integral ITC-ER rated cable is available in multiple lengths to allow for simple installation directly to the junction box without expensive conduit. Turck Banner also offers a range of hazardous area LED indicator lights (K30L & K50L) featuring extensive ATEX and CSA approvals. The indicator lights are safe to use in every classified zone or area in Europe and North America. Furthermore their IECEx approval means quicker authorisation for use in locations outside Europe and North America. To accommodate diverse hazardous


applications, the K30L and K50L are available in intrinsically safe (Ex ia), encapsulated (Ex mb/Ex ta) and non- sparking (Ex nA/Ex tc) models. The indicators also offer enhanced display flexibility, featuring five colours - green, red, yellow, blue or white - with up to three colours in one device. To eliminate false indication from ambient light, the indicator appears grey when turned off. For reliable operation, the IP67 /


The K30L and K50L are available in intrinsically safe, encapsulated and non-sparking models


IP69K indicator lights can operate in temperatures ranging from -40 to +50 degrees Celsius (-40 to +122 degrees Fahrenheit).


Turck Banner


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