Help with transformer I was given.

[diode]

firstly please excuse my ignorance re transformers. I was given this
trannsformer and was wondering if I could use it to convert 240v AC to
110-120v AC to run some low power motors (approx 150watt).
The transformer is approx 4in x 4in x 3in (100mm x100mm x75mm) painted
grey with the number D.T.2 on the top. It has two banks of taps and
they are marked (this bank does not appear to have any connections to
the transformer itself) Line, Neut,12v/3,12v/4, E4, E5, E6. The second
bank of terminals ( these do have connections running into the
transformer body, and are paired as far as continuity is concerned)
5A, 12v, 5A, 12v, E, 115v, 0, 115v, 0.
There is not continuity between either the Line or Neut to any of the
terminals.

 

[Tim Wescott]

On Mon, 23 Feb 2009 07:35:28 -0800, diode wrote:

firstly please excuse my ignorance re transformers. I was given this
trannsformer and was wondering if I could use it to convert 240v AC to
110-120v AC to run some low power motors (approx 150watt). The
transformer is approx 4in x 4in x 3in (100mm x100mm x75mm) painted grey
with the number D.T.2 on the top. It has two banks of taps and they are
marked (this bank does not appear to have any connections to the
transformer itself) Line, Neut,12v/3,12v/4, E4, E5, E6. The second bank
of terminals ( these do have connections running into the transformer
body, and are paired as far as continuity is concerned) 5A, 12v, 5A,
12v, E, 115v, 0, 115v, 0. There is not continuity between either the
Line or Neut to any of the terminals.

From the markings it looks like it's designed for a power supply that
takes 115V and delivers 5V and 12V. Given that, no, you probably can't
do what you want.

--
http://www.wescottdesign.com

 

[John Larkin]

On Mon, 23 Feb 2009 09:51:30 -0600, Tim Wescott <tim@seemywebsite.com>
wrote:

On Mon, 23 Feb 2009 07:35:28 -0800, diode wrote:

firstly please excuse my ignorance re transformers. I was given this
trannsformer and was wondering if I could use it to convert 240v AC to
110-120v AC to run some low power motors (approx 150watt). The
transformer is approx 4in x 4in x 3in (100mm x100mm x75mm) painted grey
with the number D.T.2 on the top. It has two banks of taps and they are
marked (this bank does not appear to have any connections to the
transformer itself) Line, Neut,12v/3,12v/4, E4, E5, E6. The second bank
of terminals ( these do have connections running into the transformer
body, and are paired as far as continuity is concerned) 5A, 12v, 5A,
12v, E, 115v, 0, 115v, 0. There is not continuity between either the
Line or Neut to any of the terminals.

From the markings it looks like it's designed for a power supply that
takes 115V and delivers 5V and 12V. Given that, no, you probably can't
do what you want.

It might work as a step-down autotransformer, using the 115-0-115
winding... if that's what it is.

One might experiment, with a low-current 240-volt rated fuse in the
line circuit.

John

 

[IanM]

John Larkin wrote:

On Mon, 23 Feb 2009 09:51:30 -0600, Tim Wescott <tim@seemywebsite.com
wrote:

On Mon, 23 Feb 2009 07:35:28 -0800, diode wrote:

firstly please excuse my ignorance re transformers. I was given this
trannsformer and was wondering if I could use it to convert 240v AC to
110-120v AC to run some low power motors (approx 150watt). The
transformer is approx 4in x 4in x 3in (100mm x100mm x75mm) painted grey
with the number D.T.2 on the top. It has two banks of taps and they are
marked (this bank does not appear to have any connections to the
transformer itself) Line, Neut,12v/3,12v/4, E4, E5, E6. The second bank
of terminals ( these do have connections running into the transformer
body, and are paired as far as continuity is concerned) 5A, 12v, 5A,
12v, E, 115v, 0, 115v, 0. There is not continuity between either the
Line or Neut to any of the terminals.
From the markings it looks like it's designed for a power supply that
takes 115V and delivers 5V and 12V. Given that, no, you probably can't
do what you want.

It might work as a step-down autotransformer, using the 115-0-115
winding... if that's what it is.

One might experiment, with a low-current 240-volt rated fuse in the
line circuit.

John

Lets ignore the safety aspects of a live chassis project with an OP who

hasn't even figured out transformers yet . . .

You spot the 2x 60 VA secondaries? The OP wants to run 150 W of motors!
If they were a perfect resistive load, He'd already be running a 25%
overload . . .

Wonder what duty cycle he wants?

--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
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