What are the winding connection methods of the three-phase transformer?

2019-04-19 16:04:08 JUKE CHINA ODM OEM Transformer factory Read

What are the winding connection methods of  three-phase transformers?
 prompt:

The three-phase transformer windings are connected in a star shape (Y), a triangle (D), and a meander shape (Z). There are many combinations of primary and secondary windings of the transformer. Generally, the clock representation is used. The line voltage phasors representing the primary side and the secondary side are used as the long and short needles on the clock surface. When the long needle is fixed to the 0 point position. At the time, the hour pointed by the short needle is the connected group. Such as Y, d11, it means: primary winding Y connection; secondary winding D connection; primary winding line voltage phasor U1UV

  The three-phase transformer windings are connected in a star shape (Y), a triangle (D), and a meander shape (Z). There are many combinations of primary and secondary windings of the transformer. Generally, the clock representation is used. The line voltage phasors representing the primary side and the secondary side are used as the long and short needles on the clock surface. When the long needle is fixed to the 0 point position. At the time, the hour pointed by the short needle is the connected group. Such as Y, d11, it means: primary winding Y connection; secondary winding D connection; primary winding line voltage phasor U1UV pointing to 0 point position, the secondary winding line voltage phasor U2UV pointing to the clock 11 o'clock position, once and two The phase difference between the secondary line voltages is 30° × 11 = 330°.

    The main connection group labels of three-phase transformer windings are shown in Table 1-3.

    Table 1-3 Connection group label of three-phase transformer

Connection group label of three-phase transformer.jpg

Connection group label of three-phase transformer.jpg

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