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The two coil windings are electrically isolated from each other but are magnetically linked through the common core allowing electrical power to be transferred from one coil to the other. This soft iron core is not solid but made up of individual laminations connected together to help reduce the core’s losses. These two coils are not in electrical contact with each other but are instead wrapped together around a common closed magnetic iron circuit called the “core”. In a single-phase voltage transformer the primary is usually the side with the higher voltage. For this tutorial we will define the “primary” side of the transformer as the side that usually takes power, and the “secondary” as the side that usually delivers power. Transformers are capable of either increasing or decreasing the voltage and current levels of their supply, without modifying its frequency, or the amount of electrical power being transferred from one winding to another via the magnetic circuit.Ī single phase voltage transformer basically consists of two electrical coils of wire, one called the “Primary Winding” and another called the “Secondary Winding”. Then we can say that transformers work in the “magnetic domain”, and transformers get their name from the fact that they “transform” one voltage or current level into another. Mutual induction is the process by which a coil of wire magnetically induces a voltage into another coil located in close proximity to it. A transformer operates on the principals of “electromagnetic induction”, in the form of Mutual Induction. The transformer does this by linking together two or more electrical circuits using a common oscillating magnetic circuit which is produced by the transformer itself. A transformer basically is very simple static (or stationary) electro-magnetic passive electrical device that works on the principle of Faraday’s law of induction by converting electrical energy from one value to another. The Voltage Transformer can be thought of as an electrical component rather than an electronic component.