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  2. Vector group - Wikipedia

    en.wikipedia.org/wiki/Vector_group

    The number is in units of 30 degrees. For example, a transformer with a vector group of Dy1 has a delta-connected HV winding and a wye-connected LV winding. The phase angle of the LV winding lags the HV by 30 degrees. Note that the high-voltage (HV) side always comes before the low-voltage (LV) side, regardless of which is the primary winding.

  3. High-voltage switchgear - Wikipedia

    en.wikipedia.org/wiki/High-voltage_switchgear

    750 kV high-voltage switchgear. High-voltage switchgear is any switchgear used to connect or disconnect a part of a high-voltage power system.This equipment is essential for the protection and safe operation, without interruption, of a high voltage power system, and is important because it is directly linked to the quality of the electricity supply.

  4. Trembler coil - Wikipedia

    en.wikipedia.org/wiki/Trembler_coil

    The primary winding carries the low voltage battery current, and the secondary winding generates the high voltage for the spark plug. Attached to the end of the coil is an interrupter or trembler, a magnetically operated switch, which repeatedly breaks the primary current to create flux changes in the transformer needed to produce high voltage.

  5. Polarity (mutual inductance) - Wikipedia

    en.wikipedia.org/wiki/Polarity_(mutual_inductance)

    A transformer is called "additive" if, conceptually, connecting the high-voltage terminal to the adjacent low-voltage terminal gives a total voltage between the other two terminals that is the sum of the high voltage and low voltage ratings, when the high-voltage winding is excited at rated voltage. The H1 and X2 terminals are physically adjacent.

  6. Coil winding technology - Wikipedia

    en.wikipedia.org/wiki/Coil_winding_technology

    When the winding has been placed around the coil body it will meet with the previous positioned wire and needs to make a step with the size of the wire gauge. This movement is called winding step. The winding step can occupy an area of up to 60 degree of the coil circumference for round coil bobbins and takes one side of rectangular coil bobbins.

  7. Isolation transformer - Wikipedia

    en.wikipedia.org/wiki/Isolation_transformer

    A transformer sold for isolation is often built with special insulation between primary and secondary, and is specified to withstand a high voltage between windings. Isolation transformers block transmission of the DC component in signals from one circuit to the other, but allow AC components in signals to pass.

  8. Short-circuit test - Wikipedia

    en.wikipedia.org/wiki/Short-circuit_test

    An ammeter is connected in series with the primary winding. A voltmeter is optional since the applied voltage is the same as the voltmeter reading. Now with the help of a variac, the applied voltage is slowly increased until the ammeter gives a reading equal to the rated current of the HV side. After reaching the rated current of the HV side ...

  9. Oudin coil - Wikipedia

    en.wikipedia.org/wiki/Oudin_coil

    Oudin coil used for medical electrotherapy, 1907, and a schematic diagram of its circuit (left).. An Oudin coil, also called an Oudin oscillator or Oudin resonator, is a resonant transformer circuit that generates very high voltage, high frequency alternating current (AC) electricity at low current levels, [1] [2] [3] used in the obsolete forms of electrotherapy around the turn of the 20th ...

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