CVT (Constant Voltage Transformer)
 

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 storage characteristic in conjuntion with the mains capacitor, and this energy storage produces a self-generated AC flux field which is indirectly excited from the input winding.
The result:
Instantaneous Voltage regulation. No effect of input Transient and spikes on the output. Sinusoidal output waveform. A perfect answer and remedy for all types of electronic equipment.
SALIENT FEATURES
  • No semiconductors or moving parts used, hence very high reliability
  • Intrinsic current limiting and short circuit protection.
  • Output voltage correction within ½ Cycle ( 10 msecs.) 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 msecs. 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.
   TECHNICAL INFORMATION / SPECIFICATIONS

Input Voltage

180 to 260V AC/1 Ph/50±2Hz

Output Voltage

220VAC/230VAC±1%

Frequency Effect

Approx. 1.5% change in output voltage, for 1% change in input frequency

Efficiency

90%, Typical, at full load

Common-Mode-Noise Attenuation*

1:3000, Typical (10Khz to 5 MHz; 85 to 21 db, typ.)

Normal-Mode-Noise Attenuation*

1:2500, Typical (10Khz to 5 MHz; 62 to 21 db, typ.)

Output waveform

Sinusoidal

Total Harmonic Distortion

5% (Typical) at 230VAC-Input & full-load change

Output Voltage Correction

2 cycle (max.) for no load to full load conditions

Operating Temperature

-5ºC to +50ºC

Operating Humidity

95% RH , non condensing

Ratings (VA)

50, 100, 150, 250, 350, 400, 500, 750, 1000, 1500, 2000, 3000 & 5000

Metering

0-300v, M.I. meter; Accuracy ± 2% FSD
(To monitor output voltage)

Environment

0-40°C, 95% RH (non condensing)

Caution :
Keep CVT away from magnetic storage devices and displays, like floppy disks, magnetic tapes, monitors etc. Do not use with highly inductive type of loads or with loads requiring heavy starting current surges like motors. Do not use CVTs with generators whose frequency variations are outside the specified range.

*With output Floating
CVT with special input range available on request