(under the class definition) Subject matter in which means are provided for controlling the power factor (i.e., the phase angle between the line voltage and resulting line current which is supplied to the primary circuit) of the energy supplied by an alternating current source to the armature or primary circuit of an electric motor.
(1) Note. For the combination of power factor control and one or more motor operations control, see appropriate subclass for the particular operations control. Power factor control is not such a control as is combinable with other controls to constitute plural diverse controls.
SEE OR SEARCH THIS CLASS, SUBCLASS:
165, for motor systems having synchronous motor control, particularly field-circuit control, which may modify the power factor of the energy supplied to the motor. Particularly note subclass 179 for synchronous motor systems having automatic control means which is responsive to power factor, phase angle, power, or watts in the motor armature circuit.
508, and the subclasses specified in the Notes to the definition thereof for miscellaneous motor systems having the armature circuit controlled by means of impedances (reactors, condensers, etc.) in the armature circuit.
729, and the subclasses listed in the Search Notes thereto, for power factor control in induction motor systems.
SEE OR SEARCH CLASS 323, Electricity: Power Supply or Regulation Systems,
