The definition of current transformer

Current transformer principle is based on the principle of electromagnetic induction. Current transformers consist of closed cores and windings. It has a small number of turns on the side of the primary winding, which is connected to the line where current is to be measured. The number of turns on the secondary side is relatively large. It is connected in series with the measuring instrument and the protection circuit.

Current transformer applications and features

To ensure the safe operation of power system, the operation of electrical equipment must be monitored and measured, but the general measurement and protection devices can not directly access a high-voltage equipment, which needs to be a system of high voltage and high current in proportion to transform into a low voltage and low current, supplying measuring instruments and protective device. conversion tasks to perform these devices, the most common is what we usually refer to the transformer. the voltage converter is a voltage transformer (high voltage transformer), to perform current conversion the transformer for the current transformer (current transformer), referred to CT.

Current transformer effect

The role of the current transformer is to convert a larger primary current through a certain ratio to a smaller secondary current for protection, measurement, and other purposes. For example, a current transformer with a ratio of 400/5 can convert an actual current of 400A into a current of 5A(5A precision current transformer).

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