Buy Autotransformer, Variable

Variable autotransformers are usually used in cases where there is a need for completely continuous and linear voltage changes, with the output voltage being a complete sine wave shape without any jumps or oscillations.
These devices are available in two types: single-phase and three-phase, from 0.8 amps to 1600 amps, with an insulation test of over 3 kV, and are available in two models: one for use in electrical panels and the other for laboratory use (with a cover).

Uses of Omega variable autotransformers (variable-variac):

• Can be used as a voltage source.
• Can be used as a current source.
• Control voltage and current within a specified range.
• Control direct voltage before rectifiers.
• Increase or decrease electrical voltage in order to regulate it.
• Test high and low voltage of electronic and electrical equipment.
• Lower or increase variable voltage for consumer needs.
• Installation at the input of transformers High-Voltage for insulation testing.
• Breakdown voltage test and detection of voltage effects before failure in research projects.

Use of variable autotransformers (variable-variac) Omega:

• High-voltage laboratories (conservatories, universities, factories, etc.)
• To adjust the required lighting in large halls and cinemas, etc.
• Quality control of industrial factories, etc.
• To change the speed of coal-fired engines, etc.
• Changing the temperature in electric furnaces, etc.
• Testing and calibrating voltmeters, ammeters, wattmeters, cosine phi meters, etc.

How to change voltage In Omega Company’s variable autotransformers (variac – variable – industrial dimmer):

The control mechanism in these devices is manually controlled by moving the carbon arm to precisely control the voltage up to one volt, which is displayed on a digital display showing the output voltage and current consumption.

Variable autotransformers perform voltage change operations based on changing the number of turns of the coils. In this way, by increasing or decreasing the number of turns of the coils using a manually movable arm, the transformer inductance is changed, and as a result, the required voltage is increased or decreased (three-phase variable autotransformers have a torque axis to simultaneously control each of the phases.)

This method of changing voltage does not produce any interference with harmonics and outputs a complete sine wave shape (linear continuity) and does not create any waves in the input power source. High power, efficiency, accuracy and controlled quality of output voltage are among the important features of these devices.

It is worth noting that Omega variable autotransformers include a 1-year warranty and after-sales service.
The coil material inside all variacs is completely copper, which results in high current efficiency and 98% efficiency with real power.
It has an A-rated energy efficiency certificate from the Institute of Standards and Industrial Research, which indicates the lowest energy consumption and highest efficiency.

Buy Autotransformer, Variable and Variac

In the world of electrical engineering and electronics industries, precise control of alternating voltage (AC) is one of the most critical needs for testing, calibrating and commissioning sensitive equipment. Surely you have also needed a voltage exactly between zero and 250 volts or even higher in the laboratory or production line. In such circumstances, conventional transformers with fixed output are of no use. This is where the importance of variable, variac and autotransformers as strategic tools becomes clear. Given the serious challenges facing Iran’s power grid, including frequent outages in the summer and the possibility of damage to infrastructure in critical situations, the use of voltage regulation and control equipment such as variable power transformers has become an inevitable necessity for workshops, laboratories and industrial units.

What is a variac (variable) or variable autotransformer?

To better understand this equipment, we must first answer the question of what a variable is and what its nature is? Variac, also known in the Iranian market by other names such as variable device, variable autotransformer or variable autotransformer, is a type of electrical transformer that uses only one common coil for input and output.

Unlike conventional transformers that deliver a constant voltage at the output, in a variable transformer you can adjust the output voltage from zero volts to the rated network voltage (and even higher, usually up to 250 or 300 volts in single-phase models) completely continuously and steplessly by turning a knob or movable arm (carbon brush). This unique feature makes the variable autotransformer one of the most flexible equipment in the system.