Explain the meaning of each letter and number of JDJ-10, JDZ-10, JSJW-10 voltage transformer

The meaning of each letter and number is as follows:

        (1) The first letter "J" voltage transformer .

        (2) The second letter "D" is a single phase and the "S" is a three phase.

        (3) The third letter “J” is oil-immersed and “Z” is epoxy cast.

        (4) The fourth letter "W" is a three-winding five-column type.

        (5) "-10" is a primary voltage level of 10kV.

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