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  2. Zigzag transformer - Wikipedia

    en.wikipedia.org/wiki/Zigzag_transformer

    A zigzag transformer winding is a special-purpose transformer winding with a zigzag or "interconnected star" connection, such that each output is the vector sum of two (2) phases offset by 120°. [1]

  3. Transformer oil testing - Wikipedia

    en.wikipedia.org/wiki/Transformer_oil_testing

    Transformer oil, a type of insulating and cooling oil used in transformers and other electrical equipment, needs to be tested periodically to ensure that it is still fit for purpose.

  4. Tap changer - Wikipedia

    en.wikipedia.org/wiki/Tap_changer

    Motor drive unit of a on-load tap-changer. A tap changer is a mechanism in transformers that allows for variable turn ratios to be selected in distinct steps. This is done by connecting to a number of access points, known as taps along either the primary or secondary windings.

  5. Transformer types - Wikipedia

    en.wikipedia.org/wiki/Transformer_types

    Transformers are also used in DI boxes to convert high-impedance instrument signals (e.g., bass guitar) to low impedance signals to enable them to connect to a microphone input on the mixing console. A particularly critical component is the output transformer of a valve amplifier.

  6. Distribution transformer - Wikipedia

    en.wikipedia.org/wiki/Distribution_transformer

    Single-phase distribution transformer in Canada. A distribution transformer or service transformer provides a final voltage transformation in the electric power distribution system, stepping down the voltage used in the distribution lines to the level used by the customer. [1]