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Constant Voltage Transformers

CVT maintains voltage using Ferro-resonance principle where large changes in input voltage result in small changes in output voltage. Our transformers are built to filter any distortion
Key features

  • Instantaneous regulation
  • Over current protection
  • Stability with temperature
  • Filtration of all spikes and over voltages
  • Isolated supply
  • High reliability as no semiconductors/ moving parts used
  • Constant voltage over a large input range
  • Inherent short circuit protection
  • Maintenance free




Input Volts

160-300V AC

Output Volts

220/230V AC +/-1%


50 Hz

Load Regulation

Better than 2%

Current Lamination


Full Load Efficiency

87% (approx)

Transformer Type


No Load Loss

approx 15-22% of the rated VA capacity

Frequency Variation

106% change in output voltage for every 1% change in frequency




Data Processing Equipment

Telecommunication Systems

Electrical & Electronic

Biomedical Equipment

Color Photography Labs Testing Labs

Note:- CVT can be only designed up to a limitation of 5 KVA.


  • Place the CVT away from magnetic storage and display devices like monitors, diskettes, tapes etc.,
  • Keep it in such a place that plenty of air circulation is provided to it.
  • Make sure that there are no loose connections.
  • Do not place anything on top of CVT during operation.
  • Switch off CVT when frequency variation exceeds 50+/-1Hz
  • Do not use the highly inductive loads like motors.