Changed capacitor.. Old was checked OK 60.9 hz 39.4 ohms on rotor If I lower RPM how does this effect htz Local motor shop was concerned about lowering RPM on engin to 3600 as it would lower htz to 50.5 or something in that area. I think the problem started when it was backfed from power co line.... up until then. it worked fine. Is it possible that engin speed was affected when this happened.... Maybe it was lightening that caused it.... We had lightening that night and we had other problems
The thing more important than frequency (Hz) is the voltage with no/light load. It should not be over 130 under any circumstances. You will never maintain both frequency voltage with these small generators. With a light load, voltage may be 120-125, and with a heavy load, maybe 110 to 115. The frequency may vary between 58-59 and 60-63, but there is nothing you can do about that. Just make sure the voltage does not go too high. If you always run a fairly light load, then back it off so it's no more than about 125. Don't worry about RPM; worry about voltage. Unless your generator is a 50 Hz generator, it will produce exactly 60 Hz at exactly 3600 RPM. Your shop person's RPM meter is faulty.
And by the way, you should not have had it hooked up so it could possibly have been back-fed by the power company in the first place. You could easily have killed someone working on power lines. If you don't know how to hook it up safely, then you do not need power that badly. It's not worth someone's life.
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It could be several things but it sounds like it just running too slow. I would the engine rpms first. Depending if is a two pole or four pole and if your 60hz or 50 Hz on the needed unloaded rpms.
Example: 2 pole 60 hz. Engine needs to be running at 3600 rpm loaded and 3750 rpm unloaded; unless, it has a fuel saving mode.
A 4 pole 60 hz would running half this rpm. The 2 pole producing 50hz would have the engine running at 3000 rpm loaded (about 3100 rpm unloaded)
Now in order for the 50 hz system to produce the same output voltage it requires a different alternator than the 60 hz version; otherwords, You simply can't convert a 60 hz to 50 hz version without changing the alternator by changing the engine speed.
You cannot, speed is propertional to voltage on these, as they have capacitor voltage regulation. Do not use this for powering home appliances, it is common to see this design and not a problem. If you add load and it will decrease but so will the frequency
Not sure what you mean "high voltage rpm power generator out", however many people have asked how to adjust the engine for proper voltage output. On generators with~out a voltage regulator, I adjust the engine RPM by using a digital voltage meter that has a Hz setting. Adjust the governor untill the meter displays 60 Hz. With the geneator producing 60 cycles, I know that the engine is turning 3600 rpm (the engine produces max hp when it is turning 3600 rpm). At this point, read the voltage output to verify that the range is between 115 ~ 120. On generators with a voltage regulator, verify/adjust that generator is producing 60 cycles then adjust voltage by turning screw at the regulator (some regulators are sealed with potting compound and can not be adjusted). If your power demands are not that great and you appliance can operate at 50 cycles, adjust governor as needed. Lowering to 50 cycles will also reduce output voltage. Good luck
Electric clocks use synchronized motors that run on 60 Hz AC. The power company provides AC power with a precisely regulated frequency of 60 Hz. That means that the voltage jumps back and forth (positive to negative) 60 times per second. Your generator would do the same thing if it could run at precisely 3600 rpm (that's rev's per minute) - but it can't, because the engine is not that precisely controlled. In your case it tends to run (on average) a little fast.
I hope you found this helpful.
By the way, in Europe 50 Hz is the norm. If you run a clock designed for 50 Hz on 60 Hz power, it will run 20% too fast!
According to the parts pdf, there is no voltage regulator. Voltage is adjusted by the rpm of the engine. If your have a meter that reads hertz (Hz), you can set the engine rpm by adjusting hertz to 60 cycles (Hz). At 60 cycles the engine is running at about 3600 rpm. Most engines develop their max horsepower at this rpm. If you are loosing power/voltage and the engine speed is not dropping below 3600, than most likely could be problem with capacitor, brushes or diode (bridge diode). The diode converts ac voltage from stator to direct current to power the magnet (rotor). Check for brush wear and test capacitor for value printed on part. It should test with 5% of stated value. Diode can also be easily tested with meter. Good holidays
Voltage is adjusted by raising or lowering the engine speed (governor adjustment), however one must also pay attention to the rpm because your generator was designed to produce 120 volts at 60 cycles while turning 3600 rpm. Your electrician should have tested for htz while testing for voltage. I would recommend re-testing under load and adjust governor to turn 60 cycles to see resulting voltage.
Most low voltage conditions on generators are simply due to a low engine rpm. Most modern generators are 2- pole windings. So your engine rpm should theoretically run @ 3600 rpm. which will produce 120/240 volts @ 60 HZ. In actuality You want to set your rpm's @ Approx. 3720rpm no load. About 62.5 Hz. Without getting to technical this will give you your desired 120/240 volts loaded. Hope this helps.
Actually, without a load being connected, this voltage is within specifications. As you connect loads, the engine slows down, voltage will drop as well.
If your meter has the ability, the frequency of the generator with no load plugged in should be 65 or so (preferably 63, but hard to keep it there with mechanical governor).
If you do find that your voltage is too high, with a load plugged in, you are able to reduce it slightly by adjusting the governor ever so slightly towards a lower RPM. 60 RPM = 1 Hz, and a few volts difference.
The best way to adjust your generator is to plug in a load that is half the rated wattage of the generator. Then make your adjustments, keep the frequency just a hair above 60 so that additional loads won't cause it to drop too far.
It should read 115v-120v with full load. Yes, you can slow the engine down just a little, depending on the engine, there will be a high rpm adjustment. 130v with full speed, no load, is really not too bad.