Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

power angle
the angular displacement of the rotor from the stator rotating magnetic field while the machine is on load. The power angle is also the angle between the terminal voltage Vt of a synchronous machine and the generated voltage Eg or Em, respectively, for a generator or motor. This angle denoted by δ is also referenced as power angle or torque angle or the load angle in a synchronous machine. It signifies the limits of the machine to remain in synchronism.
See torque angle
power angle curve
a curve shown the relationship between the active power output of a generator and its power angle.
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