Constant Voltage Transformer

Ferro Resonant type Constant Voltage Transformers - CVT, the AC mains power 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 operate in conjunction with mains capacitor to produce self-generated AC flux Field which is indirectly extracted from the Input Winding.

The ferroresonant action is a flux limiter rather than a voltage regulator, but with a fixed supply frequency it can maintain an almost constant average output voltage even as the input voltage varies widely.

All problems related to variation / fluctuation in Voltages is effectively handled because of this principle and a constant voltage output of � 1% is given.

General Technical Specifications of our Ferro Resonant Transformer (CVT)

Input Voltage 180 V – 260 V AC other as per customer requirements up to 90V.
Line Frequency 50Hz+/-10%
Output Voltage 220 /230 V ± 1%
Output Step Load Response 2 cycles (30 to 40 milliseconds)
Efficiency 90% (approx) under full load conditions
Output Wave Form Sine wave
Wave from Distortion 5% (approx) under full load conditions
Load power Factor 0.75% lag to 0.9% lead
Ambient Temperature -10°C to 50°C
Transformer Type Ferro-Resonant
Effect of Frequency 1.6 (approx) change in output voltage for every 1% change in line frequency.
  • High reliability.
  • Current limiting and short circuit protection.
  • Energy storage for line loss up to main 3ms at typical load.
  • Short term over load capacity.
  • Higher input voltage control range for load less than rated low.

Color Photography Labs
Bio-medical equipment
PA equipment
TV, VCD/DVD recorders & players
Printers Fax machines and all other sensitive electronic devices which require constant input voltage.