Variable Transformers

The Variable Transformer Rectifiers are based on variable transformer technology. This proven technology assures high quality DC currents with a constant ripple of 5% throughout the whole output range. In addition to very robust and durable construction, these power supplies also offer high efficiency and good mains response (sine-wave form, no harmonic distortion).

MVO Oil-Cooled Variable Ratio Rectifier

Robust enclosure highly protecting against harsh environment
 
Electronic adjustment (wear-free)
 
Constant 5% output ripple
 
Control via analog signals or field bus system
 
High efficiency

 

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Oil cooled systems are a strong and reliable solution for applications in harsh industrial environments. These designs allow a more compact integration of power. The main components are built into a corrugated steel tank. The heat losses are convected through the corrugated surface.The adjustment of these rectifiers is done by means of a motor driven variable transformer.

Features:

  • Robust construction
  • Excellent mains response
  • Easy maintenance
  • Excellent price/performance ratio
  • Great for difficult industrial conditions

Standard Technical Data:

Mains Voltage3 x 208VAC-600VAC 50/60 Hz
(other voltages available upon request)
AdjustmentStepless from 0 – 100%
Ripple5% at Full Load
Duty Factor100%
Ambient Temperature> 95°F
Surface FinishStructural laquer
SupervisionOil temperature
Overcurrent relay

Oil/Water-Cooled Variable Ratio Rectifiers

Electronic adjustment (wear-free)
 
Constant 5% output ripple
 
Control via analog signals or field bus system
 
Robust construction

 

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Oil/water-cooled systems are a strong and reliable solution for applications in harsh industrial environments. These designs allow a more compact integration of power. The main components are built into a corrugated steel tank. The heat losses are transferred through a heat exchanger allowing an external cooling water circuit to remove the heat. The adjustment of these rectifiers is done by means of a motor driven variable transformer.

Features:

  • Robust construction
  • Easy maintenance
  • Excellent price/performance ratio
  • Perfect for application under difficult industrial conditions

Standard Technical Data:

Mains Voltage3 x 208VAC-600VAC 50×60 Hz
(other voltages available upon request)
AdjustmentStepless from 0 – 100 %
Ripple5% at Full Load
Duty Factor100%
Ambient Temperature> 95°F
Water Entry TemperatureApprox. > 60°F – > 85°F
Operating AltitudeUp to 3280 ft. above sea level
Surface FinishStructural laquer
SupervisionOil temperature
Overcurrent relay