دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a transformer with only one winding, part of which is used for either the primary or secondary conductor, and part of which is used as both primary and secondary conductors.

n: an electrical device designed to reduce voltage from primary distribution levels, usually 7,200 or 12,400 volts, to utilization voltages of 480, 240, or 120 volts. See power transfornlet:

n: a transformer loss caused by magnetic currents induced in the core of a transformer that take energy from the circuit. Eddy current loss is minimized by the use of laminated cores.

.. n: a transformer loss caused by magnetism retained in the core of the transformer each time the alternating current is reversed. Some energy must be used to overcome the residual magnetism each time the current reverses.

n: used to reduce current or voltage to a known proportion of that in the circuit. A meter is attached to the reduced voltage or current and the voltage or current in the circuit is computed from the meter reading.

n: a method that testes drilling pipe. Using interchange coil to magnetize drilling pipe, then couple transformer with primary coil, people record the data of electrical conductivity, magnetic inductive capacity and rigidity.

n: a transformer that takes power from a generating station and steps up the voltage for transmission, or that takes power from the transmission line and steps down the voltage to the primary distribution level of? ,200 or 12,400 volts. See distribution transfonner.

n: the winding of an induction apparatus, such as a transformer, that is connected to the source of power and induces emf in the secondary winding.

n: the winding of an induction apparatus, such as a transformer, in which an emf is induced by the current in the primary winding.

n: connection for transforming three-phase power using two transformers;a variation of the open-delta connection.