A Current Transformer (CT) is an electric component that
produced an alternating current in its secondary coil which is proportional to
the AC in its primary coil. Current Transformers are known as instrument
transformer, which are designed for measurement. Current Transformers using in an
electrical line with high current or high voltage where current or voltage directly
measurement is too risky. CT gives a lower amount of current with its secondary
which is proportional to the current in the primary. This lower amount of
current is suitable for measuring instruments. Current Transformers are broadly
used for metering and protective relays in the electrical power industry.
A CT is applying where we need to measure line / Phase
current. It is some time difficult to measure directly for high current or high
voltage of the circuit. A CT provides an isolated lower current in its
secondary coil to the ammeter for showing the measuring value. This lower
current is proportional to the current in the primary circuit and it is
suitable for measuring instruments. Current transformer widely used in
electrical power industry for measuring, billing and protective relays.
