| Author | Message | ||
| Rob King (Skykingrob)
Registered Member Username: Skykingrob Post Number: 42 Registered: 10-2006 Posted From: 72.161.21.232 Rating: N/A |
My generator is running 1790 RPM (1800 RPM model) and putting out 118 volts. I think this is close enough on the volts but I am not an expert on electrical. What do you think? Rob 91 Prevost LeMirage XL Missouri | ||
| Sean Welsh (Sean)
Registered Member Username: Sean Post Number: 970 Registered: 1-2003 Posted From: 67.142.130.33  Rating: N/A |
118 is fine. Anything from 110 to 125 is considered "nominal" for standard household voltage. -Sean http://OurOdyssey.BlogSpot.com | ||
| clint hunter (Truthhunter)
Registered Member Username: Truthhunter Post Number: 504 Registered: 1-2009 Posted From: 24.129.237.52  Rating: N/A |
also consider the rpm holding at different loads, (once it has time to catch up with a large change in load, facter in the flywheel size/energy into the catch up process) | ||
| Jim Wallin (Powderseeker01)
Registered Member Username: Powderseeker01 Post Number: 37 Registered: 10-2008 Posted From: 208.68.48.77  Rating: N/A |
Thr speed of rotation determines the frequency, the exciter voltage is what determines the voltage. | ||
| Jack Conrad (Jackconrad)
Registered Member Username: Jackconrad Post Number: 1161 Registered: 12-2000 Posted From: 68.26.36.135  Rating: N/A |
Not sure if it is correct, but I was told it is more importamt to adjust the frequency (60-61 cycles). If frequency is correct, voltage will be within specs. Jack | ||
| David Dulmage (Daved)
Registered Member Username: Daved Post Number: 260 Registered: 12-2003 Posted From: 142.46.199.30  Rating: N/A |
120V ac elecrical equipment is typically certified with abnormal operation tests conducted at extremes of 104 V ac and 127 V ac. Mains power fluctuates as well, so 118 V ac should not be a problem as long as your distribution wiring is of adequate gauge for the current. You may want to measure the generator voltage under load. FWIW Dave D | ||
| Rob King (Skykingrob)
Registered Member Username: Skykingrob Post Number: 45 Registered: 10-2006 Posted From: 72.161.21.232 Rating: N/A |
Guys measured at 119 volt under no load, 118 volt under 25-50% load and drops to 117 volt under a 12K loadbank on a 12.5K gen. On my gen,cycles (frequency) is set by RPM and volt is adjusted by a set screw on the control board. Given the infor from you, sounds like I am okay. Thanks Rob 91 Prevost LeMirage XL Missouri | ||
| clint hunter (Truthhunter)
Registered Member Username: Truthhunter Post Number: 510 Registered: 1-2009 Posted From: 24.129.237.52 Rating: N/A |
" perfeck " as willienillie sazs | ||
| Cullen Newsom (Cullennewsom)
Registered Member Username: Cullennewsom Post Number: 139 Registered: 2-2009 Posted From: 98.200.242.221  Rating: N/A |
Rob, I can't see any problems with your genny from my house! This is nit-picky, but measurement accuracy and precision are worth remembering. Is that an NIST-Traceable calibrated meter with a four-wire kelvin connection? Or a handheld? Even expensive handhelds are typically no better than .5% Accuracy under ideal circumstances. So there goes almost one (1.77/2) volt right there (.5 of 177). Also remember that the RMS feature of handhelds that claim to do RMS readings is usually only good for a perfect sine wave; unless you've got a meter that really does RMS, instead of Average RMS. And, even most real RMS meters aren't able to give you the right answer for an AC signal with a DC component! The good news is, it doesn't really matter, as long as you know the limitations of your meter. .5% is much better than testing with your tongue. Yeh, bat boltage beelths uhbowt bight. The difference between 118V and 119V might be, your probes, meter, type of load, or any combination of those and other circumstances. Don't expect better Accuracy than your tools are able to deliver. | ||
| John Lacey (Junkman42)
Registered Member Username: Junkman42 Post Number: 101 Registered: 3-2007 Posted From: 66.82.162.13  Rating: N/A |
Cullen, just curious if You were perhaps a PMEL type in the military? Regards John | ||
| Cullen Newsom (Cullennewsom)
Registered Member Username: Cullennewsom Post Number: 146 Registered: 2-2009 Posted From: 98.200.242.221 Rating: N/A |
John, I was never in the military, but thanks! At least I think it was a compliment to be confused with a (Precision Measurement Equipment Laboratory) type. | ||
| John Lacey (Junkman42)
Registered Member Username: Junkman42 Post Number: 102 Registered: 3-2007 Posted From: 66.82.162.17 Rating: N/A |
Cullen, not derogatory, unusual to hear someone mention four wire. I served My last three of 22 years as the superintendent of the worlds largest PMEL. All of the regimens both physical, dimensional, electrical etc and had the additional responsibility for foreign items captured in the sand pits. Retired in 1980 and started My own facility and other equally not so bright undertaking's. hope to meet someday. Regards John | ||
| Cullen Newsom (Cullennewsom)
Registered Member Username: Cullennewsom Post Number: 148 Registered: 2-2009 Posted From: 98.200.242.221 Rating: N/A |
John, In that case, thanks indeed! Among my own other follies, I've been in private R&D and currently in physics research at a university. We try to precise when it matters. I'll be honored to trade you some of your best stories for my best lies over a cold beverage some day. -Cullen |