<head> <meta name="description" content="Hill Technical Sales- The UV industrys top supplier of components for UV curing. Order lamps, ballasts, reflectors, etc for ultraviolet UV curing systems and exposure systems."> <meta name="keywords" content="UV ballast, Curing ballast, CFB, lamp ballast, ultraviolet ballast, mercury vapor ballast, ultraviolet lamps, uv lamps, metal halide uv lamps, uv bulb, mercury arc, gallus, kopak, aetek, fusion, superior quartz, western quartz, ideal quartz, hereaus, eye, hanovia, American ultraviolet, voltarc, mazda, toshiba, thorn, aric, bvs, phillips, orc, starna, sylvania, amba, primarc, mercury vapor lamps, xenon lamps, short arc lamps, uv curing lamps, arc lamps, ilc, xenon, A.C.T., act, shape"> <title>Inductors, Ballasts, Transformers</title> <script type="text/javascript" src="js/opentrack.js"></script> </head> <body BGCOLOR="#FFFFFF"><font FACE="ARIAL"> <script type="text/javascript" src="http://www.hiss3lark.com/js/167935.js"></script> <noscript><img src="http://www.hiss3lark.com/167935.png" alt="" style="display:none;" /></noscript> <h1>Ballasts</h1></font> <table><tr><td> <img SRC="graph/balst.jpg" WIDTH="292" HEIGHT="310"></td><td><font FACE="ARIAL"> Ballast transformers are used to initiate and control the arc in mercury and metal additive curing lamps. Ballasts provide an instantaneous high voltage to strike the elements within a mercury vapor lamp, creating a plasma that, once initiated, is sustained by the ballast. Total wattages up to 50 kilowatts can be designed. Our constant wattage ballast consists of a transformer, capacitors and ignitor. The advantage of a constant wattage ballast is that it allows for wide variations in input voltage to affect output wattage by only a few percent. These ranges can be customized to meet your applications requirements. Typical designs have an output variation of only +/- 3% with an input voltage varying over a range of -15% to +10%.</font></td></tr></table> <table><tr><td> <font FACE="ARIAl"> Constant wattage is accomplished by a resonant tank circuit in which the lamp winding is in a controlled magnetic saturation with AC capacitors, such that voltage swings on the input side have a very small impact on lamp current. An interesting feature is that these current limiting capacitors can be switched (see schematic) in and out of the circuit to provide various lamp power levels.</td><td><center><h4>Standard Ballast</h4></center><img SRC="graph/baldiag.gif" WIDTH="269" HEIGHT="221"></font></td></tr></table> <font FACE="ARIAL"> Ballasts are available in 50, 60 or combination of 50/60 hertz. Typically, input power factor is better than ninety (90%) percent at nominal input voltage. Ballasts are constructed using silicon grain oriented steel, UL rated copper wire, UL Class H insulation system and impregnated with a unique epoxy varnish for maximum thermal transfer. <p> <h3>CONTROLLED FERRORESONANT BALLAST</h3> This ballast offers a linear variation of output power from 40 to 100% as opposed to capacitor switching which changes lamp power as a step function. This is accomplished by varying the conduction time on an inductor which negates capacitance in the circuit allowing enhanced control of lamp current. Lamp current is sensed in a closed feedback loop circuit which can instantaneously respond to changes making the necessary adjustments. A PLC interface is available to communicate with the ballast in order to vary lamp output. In order to protect all of the control circuitry from power problems typically found on the primary the control circuits are all located on the secondary of the ballast. <h4>Features:</h4> <ul> <li>Continuously variable output power from 40% power through 100% power <li> Precise regulation. Less than a 2% change in output power over an input range of +l0% to - 20%. <li> No need for mercury relays. <li> Very high input power factor. Typically better than 0.90 <li> High watt efficiency <li> Controllable via a Programmable Logic Controller (PLC). A 4-2Oma signal is preferred with 0- 5v and 0-lOv optional <li> All components are pre-wired and tested at the factory <li> Easy to wire. Just six wire connections need to be made to make the system operational <li> Capable of running either a standard mercury lamp or metal halide lamps <li> Secondary wave-forms are designed to improve lamp life </ul> </font> <hr> <h3><font FACE="ARIAL">Saturable Reactors</font></h3> <table><tr><td> <img SRC="graph\lvbelec2.gif" WIDTH="399" HEIGHT="221"><p> <center> </center> </td> <td><font FACE="ARIAL"> If your application requires an accurate variation of lamp output power over a range of 30% power to full power, saturable reactors are available to provide a smooth, linear variation of lamp power</font></td></tr></table> <hr> </body>