Purelux Catalog 2018

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emergency lighting 101 Legal requirements and guidelines It is important to be aware of legal requirements before undertaking an emergency escape lighting design. Two main instruments are of interest to emergency lighting: > The occupational health and safety act (OHS Act) > South African Bureau of Standards (SABS) specifications The OHS Act (85 of 1993), and act of parliament basically states that it is illegal not to have emergency lighting in the work place in areas where failure of the normal mains supply may present a danger through low visability. The compulsary specification (VC 8055) has been issued that calls various safety standards (including SANS 1464 part 22) making it illegal for emergency lighting products not to comply with certain levels of safety and performance. Interestingly, because the emergency lighting forms part of safety equipment, it must not only be designed to prevent shock or a fire hazard, it must also provide correct lighting levels, lighting duration and other technical levels of performance. The SABS offers internationally acceptable design guidelines to ensure the functionality and, probably more importantly for cash strapped budgets, cost effectiveness of an emergency lighting solution. In the event of an emergency, the emergency lighting systems must provide continuous illumination for a minimum of 90 minutes to allow the occupants to safely exit the building. Emergency lighting systems must meet stringent criteria for construction and performance against the occupational health and safety act (OHS Act). However, even though emergency lighting systems must meet these standards, not all systems are created equally. There are applications in which certain systems should not be used. The mounting height, light source and environment are very important to consider during installations. Some environmental issues to consider are temperature, dust, damp or a wet location and a hazardous area. The OHS Act requires an average of 1foot-candle upon initial illumination of the emergency light, and an average of not less than 0.6 foot-candle after a 90minute illumination period. Keeping that in mind, the proper choice of unit must be made to meet the foot-candle requirement. The unit source of the unit used in an office with a mounting height of 7 - 9 feet will not work in a situation where the emergency light is mounted 18 feet above the floor. Many emergency lighting systems have lead acid batteries. These batteries generally have a 5 - 7 year life expectancy as long as it is maintained in an operating temperature range of 60 - 80°F. As the temperature increases above 80°F, the life of the battery decreases dramatically. When the temperature decreases, the battery life will increase, but the run-time of the battery will decrease, thus not allowing the system to maintain the required 90 minute illumination. The sealed Nickel Cadmium maintenance-free battery is an alternate option when it comes to temperature. These batteries offer a 12 to 15 year life with an operating range of -4 to 158°F. There are also re-fillable lead acid and Nickel Cadmium batteries. These batteries require maintenance, but are great batteries to consider for temperature issues. The lead acid battery has an expected life of 8 to 12 years if maintained in an operating environment of 32 to 105°F. The Nickel Cadmium battery will have a life of 20 to 25 years, with an operating range of -22 to 140°F. There are emergency lighting units that are specifically designed for dusty, damp and wet environments.An installer can not place any unit into these situations and expect them to function as designed. Standard metal emergency lighting units will allow moisture and dust into the enclosure. There have been situations where this has occured and the result is a shorter printed circuit board because the moisture accumulated and dripped on the board components, or the dust from a metal grinding operation accumulated over time in the enclosure that created a connection between components. Hazardous environment units are again designed for their particular applications. The NEC developed Classes, Divisions and Groups for these situations. Class I refers to areas where inflammable gases or vapours may be present in sufficient quantities to produce explosive or flammable mixtures. Class II units are for areas where combustable dusts are present. Class III systems are for areas where ignitable fibers are present in sufficient quantities to produce ignitable mixtures. Division I indicates an area where the hazardous condition is normally present either continuously or periodically. Division II are areas where the hazardous condition is present due to accidental rupture, breakage or unusual faulty operation of a dosed container or system. The groups are broken down by particular categories based on class. Under Class I, Group A is for Acetylene, Group B for Hydrogen, Group C for Ether, Group D for Gasoline. Class II has Group E for Metal Dust, Group F for Coal Dust and Group G for Grain Dust. Emergency conversions are available for most <strong>Purelux</strong> luminaires. The advantages of using our fittings with factory fitted emergency lighting equipment include the peace of mind that comes with the guarantee that applies to the entire luminaire and factory fitted units installed under our quality assurance systems meeting the requirements of ICEL, BS and EN standards. 32 trading
fluorescent fittings featuring electronic ballasts energy efficient fluorescent ballasts The lighting industry has followed two paths in recent years towards the goal of improving fluorescent lamp efficiency.The first was a “make it better” approach that optomised existing lamp and ballast perfomrance, with the focus on T-12 systems. That resulted in a 10 to 20% improvement in system efficacy. The second approach - using solid-state electronics to provide high-frequency controlled power and optimum starting to fluorescent lamps - has successfully increased lamp / ballast system efficacy by as much as 30-40% and added the capability of additional features at low cost. These features include fluorescent lamp dimming, enhanced control capability and improved lamp life performance. electronic ballasts Electronic ballasts are more aptly, electronic high-frequency ballasts which increase lamp-ballasts efficacy, leading to increased energy efficiency and lower operating costs without sacrificing light output. Electronic ballasts operate lamps using electronic switching power supply circuits. These circuits take incoming 50-60Hz power (typically 120 or 277 volts) and convert it to high-frequency alternating current (AC) in the range of 20 to 40 kHz. Electronic ballasts are more efficient than magnetic ballasts in converting input power to the proper lamp power. Operating fluorescent lamps at higher frequencies reduces internal lamp losses resulting in an overall lamp-ballast system efficacy of 15 to 20% compared to efficient electromagnetically ballasted systems. Both traditional electromagnetic and high frequency electronic fluorescent ballasts utilise 50 - 60 Hz input power. The electromagnetic ballast merely regulates the 50Hz power and sends it to the lamp. The electronic ballast transforms the input power to a high frequency (20-40 kHz) before sending it to the lamp. This results in lower lamp and ballast losses and a higher system efficacy - as much as 30%. ballast terminology Ballast Power Factor: The ratio of the root mean square (RMS) power (Watts) to the volt-amps (VA) of the ballast. The power factor of the electrical loads, such as ballasts, on a system determine the overall power of the building electrical system. That measure is an indication of how efficiently electrical power is being transferred from the source to those building loads. (Note: power factor does not measure how efficiently the power is being used by the building loads). A high power factor (HPF) rating of a ballast signifies a desirable power factor equal to or greater than 0.90. A low or “normal” power factor (NPF) rating signifies a power factor less than 0.90 - usually between 0.40 and 0.70. Electric utilities may penalise customers whose overall building load has a low power factor since the lowers and transmissions efficiency of the utility’s system. Input Voltage: The design operating voltage of the ballast. Most ballasts are designed to operate at between 120 or 277 volts. Lamp - Ballast system efficacy: The ratio of lamp light output tp ballast input watts, in units of lumens per watt. Line Current Amps: The current drawn by the ballast when operating at rated voltage. Lamp Current Crest Factor (LCCF): The ratio of the peak current to the root means square (RMS) lamp current. The LCCF for lamps operated at high frequency is equal to the peak current of the modulated wave (50Hz) divided by the RMS lamp current. High current crest factors reduce lamp life and increase lamp depreciation. Life ratings for lamps are based upon an LCCF of 1.7 or less. Regulation (of line voltage): The ability of the system light output to adjust for input voltage variations. Generally expressed as a percentage variation in light output of a lamp for a percentage variation in input voltage. Volt-Amps: The apparent power of a system. It is equal to RMS of voltage x RMS of current. trading 33
Page 1 and 2: trading Product Catalogue 2018 031
Page 3 and 4: index Standard Range - Fluorescent
Page 5 and 6: standard range - fluorescent lumina
Page 19 and 20: ecessed led panel - luminaires Phot
Page 21 and 22: standard range - led bulkheads LED
Page 23 and 24: standard floodlight range - led lum
Page 25 and 26: standard floodlight range - led lum
Page 27 and 28: control gear - occupancy sensors Mi
Page 29 and 30: emergency range - led luminaires LE
Page 31: lighting accessories LED fashion wi

Purelux Catalog 2018

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