11
Check that the jaw casting contact surfaces align
with the main blades. If necessary to adjust,
loosen the jaw casting mounting bolts, tap on the
spade terminal to align, then re-tighten the bolts.
See Figure 8.
Step 3: Arcing Blade Alignment
Slowly move blade in and out to check for
proper alignment of arcing blade with the
opening in the arc chute. If necessary, adjust the
jaw casting by loosening the mounting bolts and
lightly tapping the arc chute mounting bracket.
Re-tighten the bolts. See Figure 9.
If any corrections in the arcing blade position
are necessary (after all previous steps have been
completed), loosen the locknut on the arcing blade
adjusting screw – see Figure 10 – and turn the
screw either in or out to obtain positioning of arc-
ing blade. Re-tighten the locknut.
Figure 8
Figure 9
Figure 10
Spade terminal
Jaw casting
Arc chute
Adjusting screw
BreakMaster Load Interrupter Switch
