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Re: Emergency Power Generator
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Posted by Errin OH on February 13, 2003 at 08:13:27 from (168.73.245.53):
In Reply to: Emergency Power Generator posted by Two Bit on February 13, 2003 at 06:06:11:
A couple things to think about, 20hp @3600 rpm is the requirement to run it at full power (7200w). As for your setup, ie. 7 to one or 3 to 1, the hp requirements will change. Because you are stepping up, with 7 to 1 you need something like 140hp PTO hp to produce 7200w (60hp at 3 to 1). Likewise I would figure 20hp stepped up 7-1 would only produce something like 1000w before the tractor stalls. 20hp/7=3hp at gen, (6hp @ 3-1 ratio) figuring (7200w/20hp=360w per hp) You would be looken at 1080w and 2100w respectively. I am sure these are not exact figures and it does not mean it won't work. But if you are want 7200w you need the hp to get it (ie.. PTO hp x step up or an gen that will work at lower rpms). Regulation is another story and as stated in previous post, could be a real problem if your gov is not up to snuff. A miller 225 welder fit my needs just right at 7500w. But it has its own 20 hp twine cyl engine and internal reg. Good luck.
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