Constant Voltage Transformer (CVT)

Optimum performance of sophisticated electronic equipment is highly dependent on the stability of the mains voltage. The continuously fluctuating mains supply, transients, spikes & surges produce harmful effects.

The CVTs are preferred over voltage Stabilizer as the Stabilizer have relays that are when switched cause the output voltage to be interrupted for a short time. This type of interruption or transient many not be good for computers. In comparison to voltage Stabilizer, the CVTs ensure a clean, spike-free and controlled output voltage.

BE Servo System constant voltage transformer gives an effective solution to all these problems.

Constant voltage Transformer are based on Ferro-Resonance Principle & it consists of two basic components i.e., Ferro-Resonant transformer and capacitor

Technical Specifications

Range	500 VA
Input Voltage	180V - 270V AC
Line Frequency	49-51 Hz
Output Voltage	220-230 v +/- 2%
Output Step Load Response	2 cycles (30 to 40 millisecond)
Efficiency	85-90% (approx.) under full load conditions
Output Wave Form	Sine wave
Waveform 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

Silent Features

   No feedback control used

   Intrinsic current limiting and short circuit protection

   Energy storage for line up to main 3ms at typical load.

Recommendations

Place the CVT away from equipment and all magnetic display and storage devices like diskettes, monitors, tapes etc

It is safer to connect CVT to mains supply through a 3 Pin socket ensuring thereby the availability of proper 'Earth' connection

Switch ON the CVT first then the attached peripherals and while switching OFF, switch OFF attached peripherals first and then the CVT.

In case of supply from a generator, check frequency, CVT is not be used if frequency variation is beyond 50 +/-1Hz

Switch OFF the CVT when not in use.

Not to be used for high inductive LOADS like motors.

Application

These step-up and step-down transformers are widely used for:

Bio-med equipment's	Petrol pumps displays	Fax	Telecom Equipment
Colour photography lab	Highly Sensitive machines	Computers	Data Processing Equipment
Telecommunication	All sensitive electronic devices