What Is a Current Transformer
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A current transformer, also known as a CT, is a device that measures alternating currents. They are widely used to measure high-amplitude currents.
Current transformers essentially step down (step down) high currents to lower, safer levels that you can properly manage. It lowers the current being measured so that you can measure it with an average range ammeter.
The functions of current transformers include:
Convert large primary current to 1A/5A small current
Supply current to measuring devices and protective relay coils
It separates the primary voltage from the secondary voltage.
Characteristics of current transformers include:
The resistance of the instrument current coil connected to the CT secondary winding is small. CT transformers operate in a state close to the short circuit under normal conditions
The primary windings are installed in series in the current flow.
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