Current Transformers

Current transformers are used in electrical engineering, and they are used to measure electric currents. Current transformers are also called instrument transformers. When the current of a circuit is too high, current transformers will produce a current proportional to the current in a circuit, and this can be connected to recording and measuring instruments. Current transformers can also isolate the measuring instruments from a very high voltage in the primary circuit. More common uses for current transformers are metering and protective relays in the electrical power industry. Like other transformers, current transformers have a primary winding, a magnetic core and a secondary winding. The primary functions of current transformers are to ensure primary and secondary circuits are coupled, so that the secondary current has an accurate relationship with the primary circuit.