Transformers & Accessories. Transformers are electrical devices that use electromagnetic induction to pass an alternating current (AC) Signal from one electric circuit to another, often changing the voltage and electrical current. Transformers do not pass direct currents (DC) and can be used to take the DC voltage out of a signal while keeping the part that changes.

in electrical grid transformers changing are key to changing the voltage of the electrical signal coming out of the power plant.

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