Two kinds of governors on these: Mechanical, or “droop” governor. Runs on flyweights. No load frequency should be set at or around 62-63 Hz so when under full load the generator set is at or near 60 Hz.
Isochronous or electronic governor. Uses a speed pickup on the flywheel, much like our crankshaft position sensors. Maintains generator frequency (speed) at 60 Hz under all conditions. Mechanical governors are more common on less expensive sets, as they’re relatively cheap. Electronic governors are much more expensive and typically found on more expensive units. -D > On Oct 9, 2020, at 5:52 PM, Scott Ritchey via Mercedes > <mercedes@okiebenz.com> wrote: > > I hear you. > > Power outages at our NC house were common in the past, but rare recently. I > think we had less than 10 hours of actual power outage over 15 years since we > installed a generator. I'm still glad we have it, especially if (when?) one > of us needs powered home medical equipment in the future. > > We moved to NC in 2005. Our previous house in the FL panhandle had days-long > power outages every year. We are getting older and wanted reliable power at > the new house. The "new" NC house was built in 1854 so the major 2005-2006 > remodel included a complete rewire/replumb plus a 15KW Generac automatic > standby generator and a 500 gal underground LP tank. > > In retrospect: > I think LP was a good choice for fuel ; it also feeds the stove and > fireplaces. The generator gets an annual oil change (usually) with same > Mobile 1 5W30 I use in gas engines. The generator case is steel and it's > starting to rust, ugly but not a problem. This is an older model with a > mechanical governor that is load sensitive. It runs just above 60HZ at light > load; cheap UPS systems don't like that and switch to battery, which doesn't > last long. I bought two APC Smart UPS systems (from ExcessUPS.com) which run > fine even of the frequency is a slightly high. > > -----Original Message----- > From: Dan Penoff via Mercedes > Sent: Friday, October 9, 2020 11:30 AM > > > That’s like the irony of installing a whole house generator system and have > no outages since it’s been deployed. Not that I want a hurricane, but... > > -D > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
