“A Stitch in Time...”
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7. Power Transformers<br />
Figure 19<br />
Connections for test<strong>in</strong>g <strong>in</strong>sulation resistance of a transformer high voltage<br />
w<strong>in</strong>d<strong>in</strong>g and bush<strong>in</strong>gs, and the high tension disconnect switch, <strong>in</strong> parallel,<br />
with reference to the low voltage w<strong>in</strong>d<strong>in</strong>g and ground. Note that the low<br />
voltage w<strong>in</strong>d<strong>in</strong>g is grounded for this test.<br />
8. AC Generators<br />
Figure 20<br />
With this connection, the <strong>in</strong>sulation resistance will be that of the generator<br />
stator w<strong>in</strong>d<strong>in</strong>g and connect<strong>in</strong>g cable comb<strong>in</strong>ed. To test either the stator<br />
w<strong>in</strong>d<strong>in</strong>g or the cable itself, the cable must be disconnected at the mach<strong>in</strong>e.<br />
32<br />
A STITCH IN TIME
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