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  2. Transformer types - Wikipedia

    en.wikipedia.org/wiki/Transformer_types

    Toroidal transformer. Donut-shaped toroidal transformers save space compared to E-I cores, and may reduce external magnetic field. These use a ring shaped core, copper windings wrapped around this ring (and thus threaded through the ring during winding), and tape for insulation.

  3. 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]

  4. Transformer - Wikipedia

    en.wikipedia.org/wiki/Transformer

    In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits.A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core.

  5. Trigger transformer - Wikipedia

    en.wikipedia.org/wiki/Trigger_transformer

    This electronics-related article is a stub. You can help Wikipedia by expanding it.

  6. Current transformer - Wikipedia

    en.wikipedia.org/wiki/Current_transformer

    A CT for operation on a 110 kV grid. A current transformer (CT) is a type of transformer that reduces or multiplies alternating current (AC), producing a current in its secondary which is proportional to the current in its primary.

  7. Autotransformer - Wikipedia

    en.wikipedia.org/wiki/Autotransformer

    An autotransformer has a single winding with two end terminals and one or more terminals at intermediate tap points. It is a transformer in which the primary and secondary coils have part of their turns in common.

  8. 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.

  9. Bushing (electrical) - Wikipedia

    en.wikipedia.org/wiki/Bushing_(electrical)

    A bushing must be designed to withstand the electrical field strength produced in the insulation, when any earthed material is present. As the strength of the electrical field increases, leakage paths may develop within the insulation.