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  2. Distribution transformer - Wikipedia

    en.wikipedia.org/wiki/Distribution_transformer

    In this case, single-phase distribution transformers are used. [5] The number of customers fed by a single distribution transformer varies depending on the number of customers in an area. Several homes may be fed from a single transformer in urban areas; depending on the mains voltage, rural distribution may require one transformer per customer.

  3. Electric power distribution - Wikipedia

    en.wikipedia.org/wiki/Electric_power_distribution

    Distribution substations connect to the transmission system and lower the transmission voltage to medium voltage ranging between 2 kV and 33 kV with the use of transformers. [1] Primary distribution lines carry this medium voltage power to distribution transformers located near the customer's premises. Distribution transformers again lower the ...

  4. Tap changer - Wikipedia

    en.wikipedia.org/wiki/Tap_changer

    However, a transformer may include a tap changer on each winding if there are advantages to do so. For example, in power distribution networks, a large step-down transformer may have an off-load tap changer on the primary winding and an on load automatic tap changer on the secondary winding or windings. The high voltage tap is set to match long ...

  5. Transformer - Wikipedia

    en.wikipedia.org/wiki/Transformer

    Audio-frequency transformers, used for the distribution of audio to public address loudspeakers, have taps to allow adjustment of impedance to each speaker. A center-tapped transformer is often used in the output stage of an audio power amplifier in a push-pull circuit. Modulation transformers in AM transmitters are very similar.

  6. Glossary of electrical and electronics engineering - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_electrical_and...

    distribution transformer A power transformer, usually used to change the utility distribution voltage to a lower voltage for use on the customer premises. Dolby A trademark for a noise reduction technique for analog sound recordings. dot convention A system for marking terminals on instrument transformers to maintain correct polarity.

  7. Delta-wye transformer - Wikipedia

    en.wikipedia.org/wiki/Delta-wye_transformer

    A delta-wye transformer is a type of three-phase electric power transformer design that employs delta-connected windings on its primary and wye/star connected windings on its secondary. A neutral wire can be provided on wye output side. It can be a single three-phase transformer, or built from three independent single-phase units.

  8. History of electric power transmission - Wikipedia

    en.wikipedia.org/wiki/History_of_electric_power...

    Ottó Bláthy also discovered the transformer formula, Vs/Vp = Ns/Np. [31] Electrical and electronic systems the world over rely on the principles of the original Ganz transformers. The inventors are also credited with the first use of the word "transformer" to describe a device for altering the EMF of an electric current. [30] [32]

  9. Electric power conversion - Wikipedia

    en.wikipedia.org/wiki/Electric_power_conversion

    It can also change the voltage or frequency of the current. Power converters include simple devices such as transformers , and more complex ones like resonant converters . The term can also refer to a class of electrical machinery that is used to convert one frequency of alternating current into another.

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