Why Is My 3-Phase Generator Voltage Clipping and Distorting?

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The discussion centers on a 600v 3-phase generator experiencing unstable voltage output, with phases B and C clipping at 690v and phase A showing distortion at a peak of 840v. Participants inquire about the generator's specifications, such as whether it is diesel-powered and if it is currently connected to a load. They also ask if the generator has undergone recent maintenance and whether there are signs of overheating, like the smell of hot insulation. These factors could indicate underlying issues affecting the generator's performance. Understanding these details is crucial for diagnosing the voltage clipping and distortion problem.
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I have a 600v 3 phase generator that will not put out a stable voltage. When looking at the sine wave through a scope meter I see phase “B” and “C” are clipping at 690v, Phase A is still a sine wave but with some cross over distortion. Phase “A” peak is 840v. Any Ideas?
 
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Welcome to PF! Is this a diesel powered 3 phase alternator?
 
is it connected to a load?

has it been recently worked on?

does it smell of hot insulation?
 
Last edited:

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