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Re: Re: Re: Emergency Power Generator
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Posted by Red Dave on February 13, 2003 at 10:18:11 from (24.104.94.34):
In Reply to: Re: Re: Emergency Power Generator posted by Two Bit on February 13, 2003 at 08:32:09:
The governor should do exacly what you said.
The well pump, refigerator and freezer all have motors. Motors don't like underfrequency or undervoltage conditions, either will tend to make them run hot.
Is your H governor good enough to hold frequency under varying loads? The only possible answer is -I don't know. It's 50+ years old and it could be real good or not so good, the only way to know is to try it and see.
Here at the plant, we control generator speed, which means frequency, to 1/100 of a hz. I doubt that you need that kind of accuracy to run your pump and compressors safely, but it ought to be within a couple of hz if you want to avoid trouble. The way I test portable generators is run them at rated freguency unloaded, load them to rated power and check it, then unload them and check it again. The closer it comes back to 60 hz each time, the better the governor is.
You would test the voltage regulator the same way except measure volts instead of hz and compare the results to rated voltage.
If you get a 240/120 volt generator, try to balance the load(s) across the windings as close as possible. The well pump is likely 240 so would be OK, but the fridge and freezer would likely be 120 and could unbalance you. I would unplug any unnecesary appliances, lights, clocks, computers, TV's etc. so if anything did happen, less would be damaged.
I think that what you want to do will work if you are careful.
Don't forget to disconnect everything from the incoming power line when you hook up your generator to the house. You can kill somebody if you don't. Local code may require a double throw-double pole disconnect on your incoming main.
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