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Amortisseur winding

A squirrel-cage winding placed near the surface of the pole faces of a synchronous motor. Its main purpose is to dampen any speed fluctuations that may occur as a result of sudden load changes. It is also used to accelerate the motor during starting. As the rotating field moves past the winding it induces currents in the winding which produce torque and accelerate the motor.


  • The portion of a motor, generator or alternator, that carries the main or AC current.
  • The moving part of a solenoid or relay.


a combining form meaning “self,” “same,” “spontaneous,” used in the formation of compound words:



A pipe that allows air in and out of a conservator.

Buchholz relay

A device used to detect electrical faults or gasses inside a conservator type transformer


A device that allows the passage of a conductor without touching the casing of a transformer.


Centrifugal Switch

A centrifugal switch is an electric switch that operates using the centrifugal force created from a rotating shaft.


Set of windings made up of turns.


A tank on top of an oil-filled transformer that stores oil when it expands. 


Magnetic path for flux.

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