S&C Instruction Sheet 761-505 27
Installation
(g) Move the blade assembly slowly toward the
Closed position until the blade assembly is
under the interrupter lever shaft. Verify the gap
between the end of the interrupter lever shaft
and the blade assembly is between ⁄-inch
(5 mm) and ⁄-inch (7 mm). See Figure 36.
(h) If the conditions described above are not met,
adjust as follows. Loosen the four ½–13 × 1¼-
inch hex-head galvanized steel cap screws which
fasten the terminal base castings to the
stationary insulators. See Figure 37. Shift the
terminal base castings as required. Tighten the
terminal base casting cap screws and recheck
for conformance to the conditions outlined
above. Readjust if required. Make certain the
terminal base casting cap screws are tight ened
to nal tightness (55 ft.-lb.)
If any of the conditions described in this step
cannot be achieved, contact the nearest S&C
Sales Office since it is likely that damage was
sustained during shipment.
Figure 36. Verifying the gap between the end of the interrupter
lever shaft and the blade assembly.
Figure 37. Adjusting the position of the terminal base casting.
⁄ -inch (5-mm) min,
⁄-inch (7-mm) max
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