Three-phase transformer is an important electrical equipment, widely used in power systems, mainly used to transform AC voltage, current and impedance. A three-phase transformer consists of an iron core and a winding, which includes a primary coil and a secondary coil. When an AC current passes through the primary coil, an AC magnetic flux is generated in the core, which induces a voltage or current in the secondary coil
The working principle of a three-phase transformer is based on Faraday's law of electromagnetic induction. In a three-phase AC circuit, the AC electrical signal on the high voltage side (input end) generates a magnetic flux through the coil and is transmitted to the secondary winding (output end) through the iron core to form a closed loop. The iron core has a low impedance to the magnetic flux, helping to maintain an efficient transfer of electrical energy Include:
Three-phase transformers perform a variety of functions in the power grid, main package
The high-voltage electric energy is converted into low-voltage electric energy, which is used in the transmission and distribution link to ensure safe and reliable power transmission. In industrial production and other field applications, to achieve the start of electrical equipment, voltage regulation and speed regulation functions.
Used as input and output for controlling cable access or converters The main parameter variables of three-phase transformer include rated power, rated voltage, voltage ratio, working frequency, speed, no-load current, insulation resistance and so on. These parameters are essential for the performance and safe operation of the transformer
The internal structure of a three-phase transformer usually includes parts such as iron core, winding, insulation material, etc. In order to improve efficiency and safety, the core and windings are usually soaked in a tank with insulating oil to maintain good insulation and heat dissipation performanc
Three-phase transformers can use different winding connections according to different application requirements, such as star connection, triangle connection, etc. The combination of these connections allows the three-phase transformer to adapt to different input and output voltage requirements
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