UV Electric, Inc -  Electronic Ballasts for UV Applications



LS Series Electronic Ballasts

LSA Electronic Ballast
LSA Electronic Ballast
LSC Electronic Ballast
LSC Electronic Ballast

UV Electric's LS Series is the most comprehesive high power electronic ballast product line-up offered today on the market. These ballasts, or power supplies designed to drive gaseous discharge lamps, power medium pressure UV lamps with a medium frequency, 400Hz square wave to assure stable, acoustic resonance free lamp operation. The underlying technology, a combination of high and medium frequency power processing, improves response, shrinks package size, and reduces cost.

The LS Series electronic ballasts are more efficient than comparable electromagnetic ballasts. A significant increase in UV radiation is obtained at nominal output due to the constant, non-pulsating light output. For variable UV output systems, where regulation is required, efficacy improvement over conventional ballasts are much more significant. This not only translates into energy cost savings, but also simplifies system level engineering and thermal management.

The use of UV Electric's LS Series ballasts also reduces the so called relamping costs as igniting with UV Electric's standard, internal 2kV pulse igniter and operating discharge lamps at unity current crest factor (crest factor defined as a ratio between the peak and the rms value) is the optimal condition for minimizing electrode wear and therefore extending lamp life by reducing lamp wall blackening, caused by electrode sputtering, and associated UV output reduction.

The LS Series product line-up covers the 3.3kW to 60kW power range with 44 models either with front-panel control, the LSA Series, or without it, the LSC Series. Both options have a switch that energizes the control circuits without turning on the main power. These controls are tied to a mechanical contactor to break the ac mains when stop is commanded. Each model can be programmed remotely via analog inputs (resistance, voltage, or current), via RS232 digital interface or by optional Ethernet interface.

UV Electric's LS Series ballasts are rack-mountable up-to 45kW, while the 60kW models are cabinet mounted. Air cooling is standard (air intake on the side and exhaust in the back of the rack-mountable units and air intake in the front and exhaust on the top of the cabinet mounted units) while water-cooling is optional.

The LS Series ballasts's diagnostic functions include lamp and ballast status monitoring. These ballasts have three levels of over current protection: shutdown of controlling insulated gate bipolar transistors (IGBT's), disconnect of main power, and internal fusing. If the fault condition requires user attention, such as open circuit conditions caused by a failed lamp, main power is disconnected and the diagnostic condition is latched into memory.

Finally, UV Electric's internal pulse igniter enables the use of the same ballast with variety of lamps with all kind of dopings (and same electrical, voltage and current, properties). Igniting iron dopped lamps, a well known problem, is no issue.



LS Series Models and Ratings Table


  • 400Hz Square-wave ballasts producing 20% more and constant UV radiation
  • 44 Models: 3.3kW - 60kW
  • Two versions:
    LSA Series with local and remote control and
    LSC Series with remote control only
  • Control interfaces: analog (PLC) and RS232 digital interface
  • Continuous dimming: from 15 -100% of nominal output
  • High efficiency, 92% or better, across the dimming range
  • 2kV Pulse ignition circuit
  • Unity current crest factor and no cycle-by-cycle reignition
  • Air cooled -- air exhaust in rear of cabinet or water cooled
  • Status monitoring: lamp outage detection, interlock, etc.
  • Mechanical contactor and internal fusing
  • Smaller size and weight
  • High power factor
  • CE-marked*


Input voltage: 208/240 Vac, 50-60 Hz, 3-phase;
                       380/415 Vac, 50-60 Hz, 3-phase;
                       440/480 Vac, 50-60 Hz, 3-phase;
                       240 Vac, 50-60 Hz, 1-phase, 3.3 kW only
Power factor:
greater than 90%
Inrush current:
less than nominal
Current control:
Ambient temperature:
-10°C to 40°C
Relative humidity:
from 10% to 95% noncondensing

Custom output voltage
Hot-Restrike feature
EMI Filter*
*For CE-marking an external EMI filter is required



1. Specifications subject to change without notice
2. Other options consult factory

LS Series Size Matrix

Mechanical specifications

Outline drawings and electrical interface

LSA Series front panel
LSA Series front panel
LSC Series front panel
LSC Series front panel
LSA Series package drawing, 3.3kW-45kW
LSA Series Cabinet 3.3 - 45kW
LSC Series package drawing, 3.3kW-45kW
LSC Series Cabinet 3.3 - 45kW
LSA Series package drawing, 60kW
LSA Series drawing 60kW



Terminal definitions for JS1 and JS2
Terminal definitions for JS1 and JS2





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UV Electric, Inc.
High power electronic ballasts critical to driving high power,
medium pressure UV lamps used in curing and germicidal applications.
Last updated:
June 04, 2008