Maker Pro
Maker Pro

220V 3 phase => 60 HP, how many amps?

J

Jamie

Jan 1, 1970
0
Winfield said:
Lots of companies now sell things on eBay, I just won
a used Tektronix item, and was surprised to learn I'd
bought it directly from Tektronix. So ask you company
if you can establish an eBay account sell it for them.
actually, one of my bosses has an EBay account and we do buy from
Ebay when looking for something old or odd to replace in the facility.
I'll ask tomorrow.

Lets see, 75kva 3 phase for step up. 220 to 440.
 
R

Rich Grise

Jan 1, 1970
0
actually, one of my bosses has an EBay account and we do buy from
Ebay when looking for something old or odd to replace in the facility.
I'll ask tomorrow.

Lets see, 75kva 3 phase for step up. 220 to 440.

That would be the one - like I say, all I can do is present it,
albeit some pics would help, wink, wink, nudge, nudge. :)
(assuming, of course, it's not a piece of crap.)

And where are you? There's no point in collecting a free transformer
if it would cost more than the price of a new one to ship it to
Whittier. (that's Whittier, CA 90606)

Thanks!
Rich
 
J

Jamie

Jan 1, 1970
0
Rich said:
That would be the one - like I say, all I can do is present it,
albeit some pics would help, wink, wink, nudge, nudge. :)
(assuming, of course, it's not a piece of crap.)

And where are you? There's no point in collecting a free transformer
if it would cost more than the price of a new one to ship it to
Whittier. (that's Whittier, CA 90606)

Thanks!
Rich
ha, I think you better get a new one.
I'm on the East Coast. (CT).
 
R

Rich Grise

Jan 1, 1970
0
Rich Grise wrote:
ha, I think you better get a new one.
I'm on the East Coast. (CT).

Thanks. :)

Presumably, he's already found one - yesterday, they brought in the
machine and the MG. They brought the machine in with a forklift
about the size of a garage. The MG is only about the size of a
stack of 2 desks. :)

Cheers!
Rich
 
J

Jamie

Jan 1, 1970
0
Rich said:
Thanks. :)

Presumably, he's already found one - yesterday, they brought in the
machine and the MG. They brought the machine in with a forklift
about the size of a garage. The MG is only about the size of a
stack of 2 desks. :)

Cheers!
Rich
I really think it would of been more cost effective to simply change
the motor to a lower voltage and use a drive from the 220 AC ..
oh well. Obviously water over the damn now.
 
J

JosephKK

Jan 1, 1970
0
Rich Grise [email protected] posted to sci.electronics.design:
Thanks. :)

Presumably, he's already found one - yesterday, they brought in the
machine and the MG. They brought the machine in with a forklift
about the size of a garage. The MG is only about the size of a
stack of 2 desks. :)

Cheers!
Rich

A transformer would have been smaller and lighter.
 
J

Jamie

Jan 1, 1970
0
Rich said:
nice antique. :)

I noticed it has a Tach generator on the back end ? , most likely
a 50 Volts per 1000 RPM. or at least, that is what it looks like.

Most likely has a field and so that would be a DC shunt motor.

trying to identify the maker of the motor?, could be GE, almost
looks like one. Reliance usually has more of a squarish shape to it.
Don't think it's a Baldor, they don't usually last that long!

And lesson motors are ok how ever, we've never dealt with motors
above 5 Hp from them.

Oh well :)
 
R

Rich Grise

Jan 1, 1970
0
nice antique. :)

I noticed it has a Tach generator on the back end ? , most likely
a 50 Volts per 1000 RPM. or at least, that is what it looks like.

Most likely has a field and so that would be a DC shunt motor.

trying to identify the maker of the motor?,

No, huh-uh, it's out of my hands, thank Goddess! :)

I just thought it was kinda cute, in a mongo sort of way. ;-)

Cheers!
Rich
 
Y

YD

Jan 1, 1970
0
The motor is DC, which is what the MG is for.

Thanks!
Rich

MGs are sooo 40s. Chuck it and get a solid state DC drive. You can
feed it directly from your existing supply so the cost of the drive
compensates the expense on the xfmr. Sell off the MG and you may even
end up ahead a few bucks.

- YD.
 
S

skenn_ie

Jan 1, 1970
0
Why not just rectify the 3-phase mains ? 100A rectifiers are cheap.

I recently bought a retired RN Minesweeper. The RN use 220V DC !. Be
careful though. 220 DC BITES, and doesn't let go !
 
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