Current transformers (CTs) are sensors used to linearly step down the current passing through the sensor to a lower level compatible with measurement instrumentation. The number of wire windings around the core dictates the step down ratio, or CT ratio, between the current in the measured line (primary), and the current output connected to the instrumentation (secondary).
CTs can be split core or solid core. Split-core current transformers are cost effective and efficient since the current can be measured without the need to break the conductor, thereby reducing installation and commissioning time.
