1) The ratio of primary amps divided by secondary amps. 2) The current ratio provided by the windings of the CT. For example, a CT that is rated to carry 200 Amps in the primary and 5 Amps in the secondary, would have a CT ratio of 200 to 5 or 40:1.
A transformer used to measure the amount of current flowing in a circuit by sending a lower representative current to a measuring device such as a meter.
A transducer used for the measurement of A.C. current.
A fuse designed to reduce damaging extremely high current.
The movement of electrons in a conductor measured in Amperes.