What Is The Difference Between A Current Transformer And A Voltage Transformer?
A current transformer, also sometimes referred to as a “donut”, encircles the conductor cable or wire, in which it also measures the amount of current being supplied through that particular conductor. So its design is one thing that distinguishes it from a voltage transformer. A current transformer is used when AC current is so large that connecting measuring instruments such as a kilowatt meter (the ones that the meter person checks on a house every month for your electric usage for example), would be impracticable.The CT provides a means of reproducing the effect of the primary current on a reduced scale, suited to the kilowatt meter(kwh meter). Voltage transformers besides being shaped differently than Ct’s, are designed to step up(increase) or step down(decrease) voltage. They come in a variety of styles for various reasons, such as “buck or boost”, which is a common application of an auto-transformer. A “buck” transformer subtracts secondary voltage, and a “boost” transformer adds
