Voltage Transformers

An electrical power system is a network of electrical components used to supply, transfer, and consume electric power. The power is supplied through a generation mechanism like a power plant, transferred through transmission lines and distribution systems, and consumed through residential applications. The voltage level should be measured to ensure an optimum value is transferred at various points along the power distribution system. This voltage is often very high, which cannot be measured with a conventional voltmeter. Specialized transformers known as instrument transformers are used to measure very high voltage and current along the power system. The transformer used to measure high-voltage is called a voltage transformer, also commonly called a potential transformer, and the one used to measure a high-current is called a current transformer. This article discusses the construction, working principle, measurement, types, and applications of voltage transformers.