"A transformer is an electrical apparatus designed to convert alternating current from one voltage to another"
- It can be designed to “step up” or “step down” voltages and works on the magnetic induction principle.
- A transformer has no moving parts and is a completely static solid state device, which insures, under normal operating conditions, a long and trouble-free life.
- Construction of transformer is very simple, two or more coils of insulated wire wound on a laminated steel or iron core. When voltage is introduced to one coil, called the primary winding, it magnetizes the iron core. A voltage is then induced in the other coil, called the secondary winding or output coil. The change of voltage (or voltage ratio) between the primary and secondary depends on the turns ratio of the two coils.
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