On 2/11/2014 1:40 PM, DaveC wrote:
Imagine you are asked to install a used buck-boost transformer. Imagine you
could normally do this in a few minutes. Except if the leads were cut short
such that identifying characters on the leads' insulation were missing.

Identifying 2 leads belonging to any one winding is straightforward ohm meter
work. Maybe use of a ESR meter might help separate the X windings from the H
windings?. But identifying which specific winding is which and which end is
which**not so straightforward. For me.

How would you go about identifying the windings? Maybe use a Variac to input
voltage to each of the windings then measure the output of the others? What
outputs should I expect at, for example, the H3/H4 winding with a voltage on
H1/H2 winding? How to identify backward connection of a winding?

Are the two H windings identical? The two X windings?

Suggestions welcome.

This is a 208 - 230 (ie, 12 & 24 v buck-boost voltage) single-phase
autotransformer in N. America.

Thanks.


Hey dave.. Imagine only sending this to groups that would be
interested. Woodworking , probably not

-=-=-=-

Leon,
Frequently wood- and metal-working groups are interested in mains wiring for
their equipment. They're not completely disinterested in my experience...

Dropped.

Dave