.:Eltam and EHID Ballasts

With over 40 years of experience in the design, production and supply of ballasts and other magnetic and electronic accessories for the lighting industry, Eltam has undertaken the challenge of leading the international market of high performance electronic ballasts by developing a range of electronic ballasts for HID lamps - Eltam EHID

Eltam EHID encompass unique technologies that allow sophisticated levels of monitoring and control.

EHID coincides with the worldwide movement to achieve Energy Efficient Lighting.

The EHID series presents a significant advance in electronic ballast technology by offering flexibility and compatibility with varied communication systems as well as complete autonomous ballast control.

 

.: Savings From Day 1!

Two main features influence the operating costs of all lighting systems

Energy consumption and maintenance.

Energy Saving Up To 50%:

  • Low loss ballasts
  • Fixed and steady power factor (also during dimming)
  • Steady power consumption regardless of voltage fluctuations
  • Dimming capabilities
  • Online monitoring - measures real time electrical data
  • Power factor very close to 1.0.
    • Preventive Maintenance Cost Saving Up To 30%:
  • Improved lamp life - fewer lamp replacements
  • Improved lumen maintenance
  • Online monitoring - streamlines the maintenance procedure
    		•

    .: Control Systems Over View

    Their are two main control Systems.

    -Midnight:
     
  • No additional wiring
  • Pre-programmed dimming scenes
  • easly user modifyable
    		•
    -DALI  
     
  • Requires dedicated DALI data line.
  • Much more flexable dimming options using additional DALI equipment.
  • Allows reporting of Ballast/Lamp status.
    		•

     

    Updated: 29 July, 2010

    .: EHID vs Magnetic

    Electronic Ballast Magnetic Ballast
    Lighting
    Good control of ignition process and excellent control of lamp current following ignition reduce electrode meltback and shorten the glow stage with overall effect of longer lamp life
    Limited control of the ignition process
    and lamp current following ignition
    Current
    Lamp current is square wave at low frequency which leads to increased lamp longevity
    Sinusoidal lamp current with peaks 40% higher than the RMS value
    Voltage
    Square wave lamp voltage
    Trapezoidal lamp voltage
    Lamp Watt
    Output
    The wattage output is a direct product of the lamp voltage and current (lamp power factor = 1.00) therefore lower current is required for a given
    wattage output total EHID power input has a pourer factor > 0.98
    Lamp power factor is between
    0.80 - 0.92 hence higher current is required
    for a given watt output
    Lamp Current
    Polarity
    Inversion
    Faster current polarity inversion (minimal intervals
    at low current values) increases lamp longevity
    Relatively long intervals of low lamp
    current near zero crossing of the
    current wave
    Reignition
    Voltage
    No reignition overvoltage required during steady
    state operation
    Some reignition overvoltage required,
    creating trapezoidal lamp voltage

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