The three-phase autotransformer is a type of transformer with the ability to change the voltage level of a three-phase electrical system.

A three-phase autotransformer serves to change the voltage level in a three-phase electrical system. Unlike a conventional transformer, a three-phase autotransformer uses a single winding of wire for both the input and output coils, instead of two separate windings.

Here are some common applications and purposes for three-phase autotransformers:

1. Voltage Change:

•    Voltage Boosting: It can increase the voltage level of an electrical network to meet the needs of equipment or systems requiring a higher voltage.
•    Voltage Reduction:** It can decrease the voltage level to meet the requirements of equipment or systems operating at a lower voltage.

2. Voltage Regulation:

•    Autotransformers can be used to keep the voltage level constant in an electrical network, helping to stabilize and regulate voltage.

3. Power Factor Correction:

•    They may be used to improve the power factor in electrical systems by adjusting the transformation ratio.

4. System Adaptation:

•    Autotransformers are also used in situations where it is necessary to adapt electrical systems with different voltages.

5. Energy Savings:

•    By adjusting the voltage level, autotransformers can contribute to energy savings in electrical systems, as some equipment may operate more efficiently at specific voltages.

It is important to note that while autotransformers have various applications, their use should be carefully planned and controlled to ensure the safety and performance of the electrical system in which they are employed. Additionally, applicable electrical regulations and standards must be followed.

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Dimensions in mm.