Plant Services - September 2007 - (Page 63) Performance Lighting Parts make the whole Modular Modular tee extension cable Distribution box – by electrical contractor gaIn a 360-degree vIew of your plant operatIons, makIng long-term plannIng Modular pigtail Typical fluorescent high bay Occupancy/ photo sensor Typical fluorescent high bay Class II digital control wire Typical hid high bay easy. PC control Figure 2. Example of a modular wiring system layout that can be assembled from offthe-shelf parts and easily relocated as needed. manner suits the installation. Each luminaire still can be switched or dimmed individually. Control can be by means of daylight and occupancy sensors, local controls, central scheduling or any combination. By combining addressable controls and modular wiring, an assembly line could be installed without modifications to the Headline infrastructure (Figure 2). Recent trends and code changes The 2006 NEC 410.73 requirement for a means to disconnect ballasts in double-ended fluorescent lamp luminaires takes effect on January 1, 2008. Exceptions to this requirement include plants having a written luminaire maintenance procedure. The ballast disconnect is a safety feature that permits luminaire maintenance without having to shut off the entire branch circuit. The disconnecting also can reduce labor when replacing ballasts. References 1. U.S. Department of Energy www.eere.energy.gov/buildings/info/ documents/pdfs/selpies_field_eval_ 083006.pdf 2. U.S. Department of Energy Federal Energy Management Program (FEMP) w w w1.eere.energy.gov/femp/new_ technology/techdemo_comp5.html 3. National Electrical Manufacturers Association (NEMA) www.lightingtaxdeduction.com/f5.html Program-start electronic fluorescent ballasts are available in several ballast factors (measured as actual lamp output per rated lamp output), ranging from 0.77 to 1.1, allowing tuning of a luminaire by a range of 33% using the same lamp type. Many of these ballasts operate with 120- or 277-V input, thereby cutting down on the ballast models that need to be stocked. Linear fluorescent lamps are available with extended life and lumen maintenance ratings. Lamp life now extends to 36,000 hours for some series, with lumen maintenance of as much as 95% of the original output. Selecting these lamp types reduces total lighting density requirements and extends maintenance intervals. Electronic HID ballasts are available for lamps as large as 400 watts in ambient temperature ratings of as much as 55° C. These ballasts use ceramic pulse-start lamps, which are more efficient and have better lumen maintenance than their predecessors. Light-emitting diode (LED) sources are less susceptible to vibration, shock and low temperature. Their compact size permits them to fit tighter spaces. They don’t emit UV radiation, which makes them well suited for UV-sensitive environments. Contemporary LEDs produce between 40 lumens/watt and 60 lumens/watt, which isn’t as efficient as fluorescent or www.PLANTSERVICES.com With Syclo’s SMART Suite of mobile products, you can combine the benefits of work management and automated scheduling. • Perform more preventive maintenance • Extend the life of valuable assets • Track M.R.O. parts and tools inventories • Reduce costs by cutting travel and overhead expenses www.syclo.com September 2007 63 http://www.syclo.com http://www.eere.energy.gov/buildings/info/documents/pdfs/selpies_field_eval_083006.pdf http://www1.eere.energy.gov/femp/new_technology/techdemo_comp5.html http://www.lightingtaxdeduction.com/f5.html http://www.PLANTSERVICES.com
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