8. Connect one test lead to TX Terminal 1. Connect the
other test lead to the transformer case. INFINITY should
be measured.
9. Connect one test lead to TX Terminal 7. Connect the
other test lead to the transformer case. INFINITY should
be measured.
10.Connect one test lead to TX Terminal 9. Connect the
other test lead to the transformer case. INFINITY should
be measured.
11.Connect one test lead to TX Terminal 1. Connect the
other test lead to TX Terminal 10. INFINITY should be
measured.
12.Connect one test lead to TX Terminal 1. Connect the
other test lead to TX Terminal 7. INFINITY should be
measured.
13.Connect one test lead to TX Terminal 10. Connect the
other test lead to TX Terminal 7. INFINITY should be
measured.
RESULTS:
For Steps 5, 6, and 7, replace transformer if an open
is indicated, or if the resistance value indicated is
zero. If the resistance value is not within the approxi-
mate range, proceed to test 65.
For Steps 8 through 13, replace the transformer if it
fails any of these steps.
10
9
7
6
5
1
N1
N2
224
225
224A
225A
Figure 6. Transformer (TX)
Page 74
PART 3
“V-TYPE” PREPACKAGED
TRANSFER SWITCHES
SECTION 3.4
DIAGNOSTIC TESTS
To Next Page
