Electrical Transformers and Power Transmission Basics

Transformers don’t generate electrical power. Transformers transfer electrical power

What’s an Electrical Transformer?

Electrical Transformers transfer electrical current among power circuits. Transformers change AC voltages from one power generator station to the next within power networks. Transformers are essential for utilizing electrical energy in AC Power transmission and distribution in a range of applications.

Electrical Transformer Basic Principles

Transformer cores have a stacked “winding” of thin steel laminate. Current passes through stacked winding creating a varying magnetic fields emitting an electromagnetic force in the secondary stacked winding. Winding layers are insulated for separation to ensure consistent current flow. Winding material differs among Low and High Power Transformers where different types of insulating material is required.

Transformer Core Winding Illustration
Transformer Core Winding

Low power transformers where current difference among the coiled windings is small can often use magnet wire with enamel insulation. Larger high voltage power transformers are often wound with copper and more heavily insulated.

Cooling Electrical Transformers

Obviously a lot of heat is generated within transformers. This requires cooling the transformers to maintain a safe operation temperature. Dry-type and liquid-cooled transformers use convection and radiation to dissipate heat. Increased power ratings require forced-oil, forced-air or forced-water-cooling.

Contact Select Equipment Company power distribution specialists at (888) 459-5191or sales@selectequipment for support in choosing electrical transformers suitable for your project.

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