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  Constant Voltage Transformer (CVT)

In an Elent CVT, the AC mains powers the input winding which is widely separated physically from the isolated output winding. The input winding normally runs at very moderate Flux linkage levels. The output winding exhibits an intrinsic energy characteristic and this energy storage operates in conjunction with mains capacitor to produce self-generated AC flux field which is indirectly excited from the input winding.

The result is instantaneous voltage regulation. No transient and spikes. Sinewave output. A perfect answer and remedy for every electronic equipment.
  • No semiconductors or moving parts used, hence very high reliability
  • No feedback control used
  • Intrinsic current limiting and short circuit protection
  • Output voltage correction within ½ Cycle ( 10 ms) from no load to full load for specified load and line variation
  • Short term over load capability
  • Energy storage for line loss up to 3 ms at typical loads
  • Higher input voltage control range, for loads less than rated load
  • Very high line transient/spike rejection capability and excellent input to output isolation characteristics
  • Output floating (optional)


Elent CVT is available in a wide range.. from 50 VA to 10,000 VA with load test conducted at unity power factor for all ratings. For configurations other than those mentioned above, please contact our office.


Computers, Data Processing equipment, Colour Photography Labs., Bio-medical equipment, PA equipment, Telecommunication, TV, VCD/DVD recorders & players, Teleprinters, Fax machines and all other sensitive electronic devices.
  • Keep magnetic storage and display devices like Diskettes, Spools, Monitors etc. away from the CVT
  • Switch on the CVT before switching ON the attached peripherals and while switching off, switch OFF attached peripherals first and then the CVT
  • Avoid using the CVT for high inductive loads.
  • Check frequency before using the CVT with a generator. Recommended frequency: 50 1Hz
  • Switch OFF the CVT when not in use.

  Input Voltage   180V-260V (other choices on request)
  Line Frequency   50Hz
  Output Voltage   220/230± 1%
  Output Stepload response   2 cycles (30 to 40 milliseconds)
  Efficiency   90% (approx) under full load conditions
  Output Waveform   Sinusoidal
  Waveform Distortion   5% (approx) under full load conditions
  Load Power Factor   0.75% lag to 0.9% lead
  Ambient Temperature   -5ºC to 50ºC
  Transformer Type   Ferro-Resonant
  Effect of Frequency   1.6% (approx) change in output voltage for every 1% change in
  line frequency
  Since product innovation is a continuous process at Elent, specifications are subject to
  change without notice

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