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Re: Question on Onan PTO 15kw standby generator
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Posted by buickanddeere on February 28, 2007 at 16:48:29 from (209.240.126.143):
In Reply to: Question on Onan PTO 15kw standby generator posted by Paul (ND) on February 28, 2007 at 14:53:37:
It's supposed to up the field excitation and output voltage to 10% over rated. E.g 132V instead of 120V. The timer is to limit the time the electrical equipment sees the safe max voltage of 10% over nameplate rated value. The idea is to start motor loads a little larger and farther away from the generator than a 15KW usually can. Other tricks of the trade are battery boost field excitation used in some small invertor generator. The CT transformer trick with its output in series with the generator field winding works well. Even if the generator terminal drops which would usually lower the field excitiation. The high current through the CT secondary and into the excitation field will keep the generator's excitation flux at max.
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