On October 13, 2020, the current transformer ordered by an Italian customer has been shipped
The principle of the current transformer is based on the principle of electromagnetic induction and consists of a closed core and windings. Its primary winding has very few turns, which is stringed in the line where the current needs to be measured. Therefore, it often has all the current flowing through the line. The secondary winding has a large number of turns. It is connected in series in the measuring instrument and the protection circuit. Current mutual inductance When the transformer is working, its secondary loop is always closed, so the impedance of the series coil of the measuring instrument and the protection loop is very small, and the working state of the current transformer is close to short circuit. The current transformer plays the role of current conversion and electrical isolation. It is a sensor for the secondary equipment such as measuring instruments and relay protection in the power system to obtain the current information of the electrical primary circuit. The current transformer converts high current into low current proportionally. The primary side of the transformer is connected to the primary system, and the secondary side is connected to measuring instruments, relay protection, etc.
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