What is a current transformer?

The principle of the current transformer is based on the principle of electromagnetic induction. It will replace the large current on this side with the small current on both sides to measure the instrument, and the current transformer is composed of closed heart and winding. Yes, the number of turns of its primary side winding is very small and it is connected in series with the current route to be measured, so it often has all the current of the line flowing through it and the number of turns of the secondary side winding is relatively large. Connected to the protection of measuring instruments and circuits.
When the current transformer is working, the secondary measurement circuit is always closed, so the resistance resistance of the measuring instrument and the protection series coil of the circuit will be very small, which also leads to the working state of the current transformer is closer to Short circuit, the current transformer actually converts the large current on the primary side into a small current on the secondary side for measurement, and the secondary side cannot be opened.
Its working principle is also that in the routes of power generation, transformation, distribution and power consumption, the magnitude of the current is very different, ranging from a few amps to hundreds of amps. There are current transformers, which need to be converted in order to facilitate measurement, protection and control. In order to compare the uniform current, the voltage on the other line is generally relatively high. It is very, very dangerous to measure directly. At this time, the current transformer plays the role of current conversion and electrical isolation.
The current transformer is very similar to the transformer, and it starts to work according to the principle of electromagnetic induction, but the transformer transforms the voltage while the current transformer transforms the current. The function of the current transformer is to pass a relatively large primary current through A certain transformation ratio is converted into a secondary current with a relatively small value for protection and measurement.