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A high-voltage current transformer may contain several cores, each with a secondary winding, for different purposes (such as metering circuits, control, or protection). [7] A neutral current transformer is used as earth fault protection to measure any fault current flowing through the neutral line from the wye neutral point of a transformer.
The current value may be directly displayed by an instrument, or converted to digital form for use by a monitoring or control system. Current sensing techniques include shunt resistor, current transformers and Rogowski coils, magnetic-field based transducers and others.
Choke transformers are sometimes called transmission-line transformers (although see below for a different transformer type with the same name), or Guanella transformers, or current baluns, or line isolators. Although called a "transmission line" transformer, it is distinct from the transformers made from segments of transmission line.
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.
Power conjugate variables in the analog domain are chosen that bear some resemblance to force and velocity. [27] In the electrical domain, the effort variable is voltage and the flow variable is electrical current. The ratio of voltage to current is electrical resistance . The ratio of the effort variable to the flow variable in other domains ...
An instrument that measures electric current. amorphous metal transformer A power transformer where the metallic core is made of metals cooled so quickly that they do not form a crystal structure; such transformers can reduce some kinds of energy loss. ampacity The current carrying capacity of a conductor, in the context of electric power ...
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