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• • • SAFETY IN ENGINEERING • • • 


Think you’re working safely in a hazardous area?


concerns that the voltage being supplied to temporary lighting is no longer within certified limits. How can anyone be absolutely sure what voltage is being supplied, especially in a long cable situation? Could it be one volt more or less than the


W


certified safe range? Reassurance is now available from Wolf Safety Lighting, world leaders in the design and manufacture of portable and temporary lighting for use in hazardous areas. The company’s SOVI™ (Safe Optimal Voltage Indicator) technology removes all doubt, giving operators immediate warning when voltage either slips below or exceeds certified limits, even by just one volt. Unique to Wolf Safety products, the pioneering technology is now incorporated into the company’s ATEX and IECEx certified Hazardous Area Temporary Lighting range, further enhancing safety in potentially explosive atmospheres.In the event that a light is operating at a voltage above the maximum certified limit, the beam will pulse from bright to dim, giving a clear warning that action is needed to ensure that work can continue safely in the hazardous area. However, it is more likely that issues will arise at the lower end of the voltage range. For example, if too many 24-volt lights are strung together and the transformer is overloaded, voltage could drop below the optimal level and light output will reduce incrementally as the input voltage falls. If this does occur, SOVI™ will pulse the light, clearly showing the lamp is not operating within its optimal voltage range and optimum light output, even though the light itself is still safe as it is uniquely certified down to 0 (zero) volts. This differs from other ATEX lights, where a reduced voltage supply can lead to the light operating outside the certified voltage range. www.wolfsafety.com


   


orking in potentially explosive atmospheres is hazardous enough without


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electricalengineeringmagazine.co.uk


ELECTRICAL ENGINEERING • MARCH 2021 37


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