The way a GFCI operates is by comparing the line current and the neutral current inside the device. If some of the neutral current is returning through a ground circuit instead of the neutral the imbalance will trip the device. The generator neutral and the inverter neutral must have a common neutral-ground bond and only one! Your presentation indicates operational differences, multiple bonding points (two or more) can cause a neutral ground imbalance when load, source changes occur. The load-source changes can affect the tripping result.
On Sat, Dec 19, 2020 at 5:23 PM jay <jay.pe...@gmail.com> wrote: > HI All, > > I have a client with a older Kohler 8-10kw generator, VFX 3648 stacked > inverters, newer rolls batteries. its been installed and operating normally > for 10+ years. > > Customer had to upgrade the house for code, which involved installing GFCI > outlets and GFCI breakers. > > Since then the GFI outlets trip every time the generator starts but only > after 3-30 minutes. They work normally on the inverters. And if you do a > bypass/generator direct the GFI outlets don’t trip. > > The GFI breakers trip when the generator is about to turn off, not during > warm down but say 30 minutes before it will turn off. So charging current > is at the lowest. And again they all work normally on the inverters and all > the rest of the charge cycle. > > > Voltage is a bit high, around 254v-259v from the generator but it is the > whole time and seems to stable voltage. But if the voltage was the issue > the outlets would keep tripping. If it was too high for the breakers, why > at the end and not the beginning? > > I’m thinking its possibly a control board in the generator that’s not > working well. Can’t keep up with the PF for the inverters, etc. > > Buts its a new issue I’ve not run across. > > Any ideas? > > thanks > > jay > > peltz power > > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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