Question
Download Solution PDFWhat are the zero power factor characteristics (ZPFC) used for in the context of alternators?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Zero Power Factor Characteristic (ZPFC):
- ZPFC of a generator is a curve of the armature terminal voltage and the field current.
- The machine is operated with constantly rated armature current at synchronous speed and zero lagging power factor.
- The Zero Power Factor Characteristic is also called as Potier Characteristic.
- For maintaining very low power factor, the alternator is loaded by means of reactors or by an under excited synchronous motor.
- The shape of ZPFC is very much like that of the O.C.C. The phasor diagram corresponding to zero power factor lagging is shown below.
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