Power Transformers Directory at The Electricity Forum contains a listing of electrical power transformers, power and distribution transformer manufacturers and suppliers, transformer service and transformer maintenance facilities, transformer protection companies, electrical transformer rental and repair, transformer monitoring equipment, electrical transformer testing, power transformer manufacturing companies, distribution transformer companies, and the following subcategories:
They are used to "transform" voltage from one level to another, usually from a higher voltage to a lower voltage. They do this by applying the principle of magnetic induction between coils to convert voltage and/or current levels.
In this way, they are a passive device which changes alternating current (otherwise known as "AC") electric energy from one circuit into another through electromagnetic induction. This device normally consists of a ferromagnetic core and two or more coils called "windings". A changing current in the primary winding creates an alternating magnetic field in the core. In turn, the core multiplies this field and couples the most of the flux through the secondary windings. This in turn induces alternating voltage (or emf) in each of the secondary coils.
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| Instrument Transformers | Transformer Insulation | transformers | transformer |
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| signal transformer | hammond transformers | power transformer | hammond transformer |
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| electric transformers | transformer design | transformer theory | variable transformers |
| optimus prime transformers | transformer oil | control transformer | transformers for sale |
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| high voltage transformer | pulse transformer | padmount transformers | variable transformer |
See also: Power Transformers, Power Transformers Construction, Pole Mount Transformers, Padmount Transformer
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