Counter EMF

Voltage or cell or battery opposing the voltage of the charging source.

Coulomb

A unit of electric charge in SI units (International System of Units). A Coulomb is the quantity of electric charge that passes any crossection of a conductor in one second when the current is maintained constant at one ampere.

Corona Discharge

An electrical discharge at the surface of a conductor accompanied by the ionization of the surrounding atmosphere. It can be accompanied by light and audible noise.

Core Loss

Power loss in a transformer due to excitation of the magnetic circuit (core). No load losses are present at all times when the transformer has voltage applied.

Core Balance Current Transformer

A ring-type current transformer in which all primary conductors are passed through the aperture making any secondary current proportional to any imbalance in current.