- posted
14 years ago
Yawn.
Inverter or laptop power adapter?
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- posted
14 years ago
>
> Michael A. Terrell wrote:
> > Pal> >>
> >>
> >>> They {UPS} have to detect the loss of the line voltage before the inverter
> >>> will tun on.
> >> Many do. Many do not and have a run switch that will start up the UPS
> >> without any mains supply. Those that don't are usually fairly easy to
> >> modify so that they will start up without a supply present. A typical
> >> mod is as simple as a momentary-action switch wired across a set of
> >> relay contacts.
> >>
> >> --
> >> Sue
> >
> >
> > All of the models I use monitor the AC line quality, and use a
> > microprocessor to decide when to switch.
> >
> >
>
> Even the swish ones that do a lot of line quality monitoring will start
> the inverter up when plugged into an out-of-tolerance supply. The
> /supply present/ signal to the uproc is often either an opto-isolated
> logic level or a relay contact. Faking one of those with a momentary
> contact switch will get the uproc acting as if it has a supply present
> and it will start monitoring the input supply - which, with no supply
> present will cause the inverter to start up.
>
> Another thing to look out for is a (test) jumper on (one of) the pec(s).
> I haven't come across a modern one without one - although I seldom see > anything
- posted
14 years ago
Idiot. When they have clean power they DO NOT start at all.
It is when the power sags or fails completely that they begin to perform their job. D'oh!
It is when the power sags or fails completely that they begin to perform their job. D'oh!
- posted
14 years ago
We are using plenty of UPSs where the inverter runs all the time.
What you say could be true for a Standby UPS, however I suspect that
even then the inverter is actually active, it's just not supplying
power to the load. An on-line UPS will have its inverter actively
powering the load all the time the UPS is switch on.
- posted
14 years ago
The 12V laptop supply will probably be more efficient and less prone to
incompatibilities between a 115V PS and an inverter.
A good (not Radio Shack) inverter will provide more flexibility in the event 115 VAC is needed for other gizmos. It will, of course, be more expensive.
A good (not Radio Shack) inverter will provide more flexibility in the event 115 VAC is needed for other gizmos. It will, of course, be more expensive.
- posted
14 years ago
My friend decided to go with the 100W Anyplug adapter from Targus; It will
run from 110VAC, 12VDC, and whatever DC is used on commercial aircraft. I
appreciate all the info and opinions; I knew going in that there were
several ways to skin the cat and wanted to hear what others might do.
Again Thanks Ron
Again Thanks Ron
- posted
14 years ago
These are all off line UPS.
- posted
14 years ago
So MGE are not telling the truth?
* 2,200 / 3,000VA (2/3U) * True On Line * 0.9 PF * Modular UPS * Hot Swappable batteries * 2 Load segments * USB and RS232 ports [/quote]
Maybe I should confront them about it, do you think?
formatting link
[quote]
Modular on-line double conversion UPS.
Ideal protection for Servers, data storage, network equipment,
Telephony - VoIP & Medical equipment - Industrial processes.* 2,200 / 3,000VA (2/3U) * True On Line * 0.9 PF * Modular UPS * Hot Swappable batteries * 2 Load segments * USB and RS232 ports [/quote]
Maybe I should confront them about it, do you think?
- posted
14 years ago
I suspect that they already know that UPS come in three flavours:
line-interactive, online and oiffline and that various manufacturers
make different types - some producing all three types.
Even within each type, there are very many different designs. Designs for medium sized (2kVA10kVA ) tending to be rather different than those 10kVA.
The poster you are replying to seems to be talking about his experience with
Even within each type, there are very many different designs. Designs for medium sized (2kVA10kVA ) tending to be rather different than those 10kVA.
The poster you are replying to seems to be talking about his experience with
- posted
14 years ago
WTF does that have to do with APC UPS in the < 1 KVA range? Have you
always had a reading comprehension problem, or is it from excessive
drinking and old age?
- posted
14 years ago
Who would put a 10 KVA online UPS on a small boat? It might weigh
more than the boat, itself. :)
- posted
14 years ago
One of the main manufacturers of floating gin palaces is just down the
road from me, in Plymouth (UK):
OK, not exactly "small boats". But they have oodles of amps...
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OK, not exactly "small boats". But they have oodles of amps...
- posted
14 years ago
Falcon SG series from 800VA true on-line
XP Energy Systems MSX series from 700VA true on-line
Liebert GXT2 Series from 500VA true on-line
AEC T1 Series from 500VA true on-line
Sinetech MHC Series from 700VA true on-line
Plenty of true on-line double conversion UPSs under 1kVA.
I have no comprehension problems, your 'these' could have referred to any of the UPS ranges mentioned in the thread so far from my point of view. So what I gather you were actually referring to were your UPSs. I apologise for misunderstanding, but take issue with the rather unfriendly manner in which you decided to point out my error, are you always that rude?
I don't drink, and young enough thanks.
As for APC, no-one has mentioned APC before you did. We used some APC UPSs years ago, which were 500VA, and we were able to start them without line power. I can't remember the model though. They looked a bit like the APC Smart-UPS range, but were cream rather than black, in a 2U 19" rack format.
Plenty of true on-line double conversion UPSs under 1kVA.
I have no comprehension problems, your 'these' could have referred to any of the UPS ranges mentioned in the thread so far from my point of view. So what I gather you were actually referring to were your UPSs. I apologise for misunderstanding, but take issue with the rather unfriendly manner in which you decided to point out my error, are you always that rude?
I don't drink, and young enough thanks.
As for APC, no-one has mentioned APC before you did. We used some APC UPSs years ago, which were 500VA, and we were able to start them without line power. I can't remember the model though. They looked a bit like the APC Smart-UPS range, but were cream rather than black, in a 2U 19" rack format.
- posted
14 years ago
Well, ballast is often made out of lead. ;-)
- posted
14 years ago
The ones I am talking about are for PCs, Why would you want a
rackmount UPS on a small boat? S 100 VA inverter would make more sense,
and wouldn't need to be hacked.
- posted
14 years ago
I installed a dual battery systems on a pair of paddlewheel boats at
Lesourdsville Lake, an amusement park in SW Ohio in the early '70s.
They insisted on using a 12 VDC to 120 VAC motor generator to run a tube
audio amplifier, and a broadcast cart deck for music. If the boat's
engine was shut off for more than ten minutes it wouldn't start. I
couldn't convince them to switch to 12 VDC 8-track or cassette decks, so
they spent about $1000 to buy two deep cycle batteries and two dual
chargers, plus the golden time labor to have them done for an after prom
party. We worked all night to get the two boats ready, and we were just
leaving the dock when the carloads of kids started to show up.
- posted
14 years ago
So are balloons! ;-)
- posted
14 years ago
Been to one of Dimbulb's parties?
- posted
14 years ago
Parties? Did he finally get the permit from the EPA?