This particular generator is probably 2 years old. The other ones are
probably closer to 12 years old and have 0 problems =/
Josh Luthman
24/7 Help Desk: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Mon, Sep 21, 2020 at 3:31 PM Bill Prince <part15...@gmail.com> wrote:
> How long have you had the generator? The first thing to have problems on a
> gas generator is usually the carburetor (and/or the fuel system). The only
> thing we've had to service on our gas generators is carbs, filters, and oil
> changes.
>
>
> bp
> <part15sbs{at}gmail{dot}com>
>
> On 9/21/2020 8:03 AM, Josh Luthman wrote:
>
> Before the UPS units were plugged in, it ran just fine. Once they were
> plugged in it sounded like it was struggling/running out of gas - this was
> resolved by closing the choke a little bit. Do you think that's a
> frequency problem?
>
> 110vac at the UPS. I didn't measure what was coming out of the generator.
>
> 6 amps per UPS load. It charges very slowly so maybe 7-8 amps. Still,
> well within the 20 amp circuit limit. Generator has a 220v 30 amp plug as
> well. It's an 8500w unit. This is it:
> https://www.lowes.com/pd/Troy-Bilt-6250-8500-Watt-Gasoline-Portable-Generator-with-Briggs-Stratton-Engine/4732729
>
> UPS is two 1500va APC- Smart UPS 1500VA. It's an OLDER version of this:
> https://www.amazon.com/APC-Smart-UPS-SMX1500RM2U-1500VA-System/dp/B002TIR2Z2/
>
> Josh Luthman
> 24/7 Help Desk: 937-552-2340
> Direct: 937-552-2343
> 1100 Wayne St
> Suite 1337
> Troy, OH 45373
>
>
> On Mon, Sep 21, 2020 at 10:44 AM Ken Hohhof <af...@kwisp.com> wrote:
>
>> 110v at the generator or the other end of the 175 feet of 10 AWG wire?
>>
>>
>>
>> And total load is 5-6 amps each including the UPS charging the
>> batteries? What kind of UPS? Something like an APC will have a relatively
>> low charging current, other setups may be quite a bit higher. I know our
>> Alpha UPS units have programmable charging current and I had to lower it in
>> case the only generator I have available is our smallest Honda 1000 VA,
>> otherwise the generator would run for a minute or two and then trip on
>> overload.
>>
>>
>>
>> Doing the math on voltage drop in the wire, 10 AWG is around 1 ohm per
>> 1000 feet, and you have 350 feet of wire including hot and neutral. So
>> 0.35 ohm times 5.5 amps is 2 volts. Assuming the generator is putting out
>> 120 volts, that wouldn’t account for a 10 volt drop.
>>
>>
>>
>> Sounds like you suspect the generator can’t handle the load and as a
>> result is putting out low voltage.
>>
>>
>>
>> What kind of generator is this? Is it an inverter style? What is the VA
>> rating? If it’s just a standard generator for power tools and stuff, a UPS
>> will sometimes find the voltage or frequency out of spec or unstable and
>> refuse to run off it. If it’s just an APC UPS or something like that,
>> sometimes they have a sensitivity setting that you can set lower.
>>
>>
>>
>>
>>
>> *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Josh Luthman
>> *Sent:* Monday, September 21, 2020 9:22 AM
>> *To:* AFMUG <af@af.afmug.com>
>> *Subject:* [AFMUG] Generator power supply questions
>>
>>
>>
>> So Friday we have another 3 phase go down in the building. They
>> unplugged it all so that wing had nothing.
>>
>>
>>
>> As a precaution I start up the generator. When they're cutting the other
>> phases we are using I move it to the generator. The generator complains
>> and the UPS units don't switch over. I drop it to say 90% open choke and
>> the UPS switches over - but it's only 110v. I'd like to know what's going
>> on here.
>>
>>
>>
>> I have 175 feet of 10 gauge (times 2). Two circuits on the generator,
>> two runs of copper, two UPS. UPS is doing about 5-6 amps each.
>>
>>
>> What can I do better? Should I? It runs but I'd like to keep it as
>> simple as possible to avoid "teaching someone" to lower it from full open
>> choke.
>>
>>
>>
>> Josh Luthman
>> 24/7 Help Desk: 937-552-2340
>> Direct: 937-552-2343
>> 1100 Wayne St
>> Suite 1337
>> Troy, OH 45373
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