THE TRANSFORMER & ELECTRICAL Co Ltd

              

 

 Constant Voltage Transformers

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TEC manufactures and supplies a range of CVTs to a number of customers for incorporation in their own equipment.

The CVTs are solidly built units with no moving parts or electronic components except one or more resonating capacitors (CVTs can be supplied with or without capacitors). This makes the CVT almost indestructible. The output can be continuously and completely short circuited without damage to itself.

The CVT will provide a regulated voltage output on a cycle to cycle basis whilst being unaffected by either low or high input voltage. The CVT will present a low impedance to very high voltage surges and provide an effective barrier to lower energy spikes which can cause data corruption in computers and computer-based equipment.

Although normally specified over a ±15% input range, the CVT does not stop working outside this range, however for practical reasons a swing in excess of ±25% ceases to give a useful output. Because of the resonating circuit in the output of the CVT, a limited energy storage capability is exhibited which will maintain the output for a period approximating a half a cycle if the input is temporarily interrupted.

TEC CVTs are manufactured using class F materials as a minimum. In addition to normal testing each CVT is checked for insulation integrity by "flashing" the input and output windings to core and earth.

CVTs for INVERTERS

AVAILABLE FOR THE FOLLOWING DC INVERTER INPUTS

DC INPUT 12VDC, 24VDC, 36VDC, 48VDC, 96VDC, 110VDC.

INPUT TOLERANCES ±15%.
AC OUTPUT

The output voltage will remain within ±4% of nominal from zero to full load, at unity power factor, over the input tolerances.

LINE STABILISATION

Output voltage will be typically ±3% for ±15% input range.

WAVEFORM

The output waveform is sinusoidal, with less than 3% harmonic distortion.

FREQUENCY

50 Hz or 60 Hz - please specify.

EFFICIENCY

Typical efficiency at full load and nominal input voltage is greater than 80%.

RATING (@ 0.7 power factor)

250 VA - 6000 VA

OPTIONS

Flying leads, Stud type terminals on top of CVT, Stud type terminals on front of CVT, or CVT prone with terminals.

CVTs for general use

AVAILABLE FOR THE FOLLOWING AC INPUTS

AC INPUT 110 V TO 440 V.

INPUT TOLERANCES ±15%.
AC OUTPUT

The output voltage will remain within ±4% of nominal from zero to full load, at unity power factor, over the input tolerances.

LINE STABILISATION

Output voltage will be typically ±3% for ±15% input range.

WAVEFORM

The output waveform is sinusoidal. with less than 3% harmonic distortion.

FREQUENCY

50 Hz or 60 Hz - please specify.

EFFICIENCY

Typical efficiency at full load And nominal input voltage is greater than 80%.

RATING (@ 0.7 power factor)

250 VA - 6000 VA

OPTIONS

Flying leads, Stud type terminals on top of CVT, Stud type terminals on front of CVT, or CVT prone with terminals.

TRI-PORT CVTs

AVAILABLE FOR THE FOLLOWING INPUTS

DC INVERTER SUPPLY VOLTAGES 12VDC, 24VDC, 36VDC, 48VDC, 96VDC, 110VDC.

ANY AC INPUT SUPPLY VOLTAGE BETWEEN 110 V & 440 V (to be specified).

INPUT TOLERANCES ±15%.
AC OUTPUT

The output voltage will remain within ±4% of nominal from zero to full load, at unity power factor, over the input tolerances.

LINE STABILISATION

Output voltage will be typically ±3% for ±15% input range.

WAVEFORM

The output waveform is sinusoidal, with less than 3% harmonic distortion.

FREQUENCY

50 Hz or 60 Hz - please specify.

EFFICIENCY

Typical efficiency at full load and nominal input voltage is greater than 80%.

RATING (@ 0.7 power factor)

300 VA - 7500 VA

OPTIONS

Flying leads, Stud type terminals on top of CVT, Stud type terminals on front of CVT, or CVT prone with terminals.

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