15 kVa UPS, 3 phase, worth $50?

[Ignoramus6607]

Someone is offering me a 15 kVa UPS for $50, made around 1994. It is 3
phase. I have no need for such a UPS, as such, however based on my
past experience I know that there is plenty of expensive power
electronics, IGBTs, etc. Also copper, connectors, caps, receptacles,
contactors, snubbers and whatnot.

I demolished a few big UPSes before and it was very satisfying.

So... Is there something interesting in 15 kVa units that would not be
in 5-8 kVa units? Worth the $50 purchase price? I suppose that there
should be at least 6 big IGBTs, 100,000 uF caps, and what I mentioned above.

i

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[Impmon]

So... Is there something interesting in 15 kVa units that would not be
in 5-8 kVa units? Worth the $50 purchase price?

Well, 3 phase isn't exactly common and usually are used in industrial.
Homes and most commercial are wired for single phase only. If it
works, it may be worthwhile to a small industrial that has a tight
budget.

Have you tried searching the completed auctions on eBay for 3 phase
UPS? See if they are worth $50 or so?

 

[Don Lancaster]

Someone is offering me a 15 kVa UPS for $50, made around 1994. It is 3
phase. I have no need for such a UPS, as such, however based on my
past experience I know that there is plenty of expensive power
electronics, IGBTs, etc. Also copper, connectors, caps, receptacles,
contactors, snubbers and whatnot.

I demolished a few big UPSes before and it was very satisfying.

So... Is there something interesting in 15 kVa units that would not be
in 5-8 kVa units? Worth the $50 purchase price? I suppose that there
should be at least 6 big IGBTs, 100,000 uF caps, and what I mentioned above.

i

The batteries are probably shot.

That age might be obsolete bipolar Darlingtons rather than IGBT's as I
just found out with two much newer and near mint 25 HP Reliance Drives.

But I got the drives for $2.50 each with free shipping.
Leaving some wiggle room.

The caps (except possibly for the main bank) and the whatnots are not
worth pissing over. We give them to another eBay seller who pays us $200
per month to haul all of our trash away.

Some of the older UPS are capacitor storage only and are really a power
quality conditioner that only can coast through a few cycles. We did
sell a large one of these a few years back, but it was not worth the
hassles and the uncertainty.

The thing about three phase VFC motor drives is you can buy a brand new
unit for much less than the shipping on an older one.

http://www.tinaja.com/gurgrm01.asp
http://www.tinaja.com/auct01.asp
http://www.tinaja.com/whtnu05.asp

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Many thanks,

Don Lancaster voice phone: (928)428-4073
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml email: [email protected]

Please visit my GURU's LAIR web site at http://www.tinaja.com

 

[Don Lancaster]

The batteries are probably shot.

That age might be obsolete bipolar Darlingtons rather than IGBT's as I
just found out with two much newer and near mint 25 HP Reliance Drives.

But I got the drives for $2.50 each with free shipping.
Leaving some wiggle room.

The caps (except possibly for the main bank) and the whatnots are not
worth pissing over. We give them to another eBay seller who pays us $200
per month to haul all of our trash away.

Some of the older UPS are capacitor storage only and are really a power
quality conditioner that only can coast through a few cycles. We did
sell a large one of these a few years back, but it was not worth the
hassles and the uncertainty.

The thing about three phase VFC motor drives is you can buy a brand new
unit for much less than the shipping on an older one.

http://www.tinaja.com/gurgrm01.asp
http://www.tinaja.com/auct01.asp
http://www.tinaja.com/whtnu05.asp

Also an IGBT sixpack module of 100 amps 1500 volts is worth about $30 in
large quantities these days.


--
Many thanks,

Don Lancaster voice phone: (928)428-4073
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml email: [email protected]

Please visit my GURU's LAIR web site at http://www.tinaja.com

 

[Ignoramus6607]

The batteries are probably shot.

Forgot to say, there are no batteries. (which I like a lot)

I will sell this thing by components only.

That age might be obsolete bipolar Darlingtons rather than IGBT's as I
just found out with two much newer and near mint 25 HP Reliance Drives.

But I got the drives for $2.50 each with free shipping.
Leaving some wiggle room.

Congrats Don, you are da man!

I got some 600A circuit breakers for $6 apiece recently.

The caps (except possibly for the main bank) and the whatnots are not
worth pissing over. We give them to another eBay seller who pays us $200
per month to haul all of our trash away.

I may check a little bit about what is inside before committing. The
previous big ass upses were a goldmine.

Some of the older UPS are capacitor storage only and are really a power
quality conditioner that only can coast through a few cycles. We did
sell a large one of these a few years back, but it was not worth the
hassles and the uncertainty.

The thing about three phase VFC motor drives is you can buy a brand new
unit for much less than the shipping on an older one.

http://www.tinaja.com/gurgrm01.asp
http://www.tinaja.com/auct01.asp
http://www.tinaja.com/whtnu05.asp

--

 

[Ignoramus6607]

Also an IGBT sixpack module of 100 amps 1500 volts is worth about $30 in
large quantities these days.

I calculated, it ought to be more like 400 amps apiece, 6 pieces (6
half bridges)

i
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[Ignoramus6607]

I calculated, it ought to be more like 400 amps apiece, 6 pieces (6
half bridges)

5 kVa UPSes that I demolished last spring, had 150A IGBTs. Is this one
more like the kind that produces 3 5 kVa phases, or the kind that
makes three 15 kVa outputs (3 phase). Depends on their safety factors.

i

 

[Rita Ä Berkowitz]

Someone is offering me a 15 kVa UPS for $50, made around 1994. It is 3
phase. I have no need for such a UPS, as such, however based on my
past experience I know that there is plenty of expensive power
electronics, IGBTs, etc. Also copper, connectors, caps, receptacles,
contactors, snubbers and whatnot.

If they are trying to offer you $50 to take it away they are insulting your
intelligence. Depending on the size of the UPS our prices start at $1,200
for the removal and *proper* disposal of the unit and all it's components.
Of course, this means they must have the UPS disconnected and ready for
transport, preferably sitting on their loading dock.

The only three phase UPS you can make a few bucks on eBay with is a newer
model APC unit. The problem with three phase UPS units is they are
generally site specific and most will never accept a used unit. NEVER pay
for UPS units! And always surcharge an extra $400 for them fucking
Lieberts. Unless you have local customers that want these it's not worth
screwing with.






Rita

 

[Ignoramus20247]

If they are trying to offer you $50 to take it away they are insulting your
intelligence. Depending on the size of the UPS our prices start at $1,200
for the removal and *proper* disposal of the unit and all it's components.
Of course, this means they must have the UPS disconnected and ready for
transport, preferably sitting on their loading dock.

The only three phase UPS you can make a few bucks on eBay with is a newer
model APC unit. The problem with three phase UPS units is they are
generally site specific and most will never accept a used unit. NEVER pay
for UPS units! And always surcharge an extra $400 for them fucking
Lieberts. Unless you have local customers that want these it's not worth
screwing with.

Yes, I think that $50 may be too much. In any case, as I said, it
would be for scrap.

i