GE Industrial Solutions ProTrip Conversion Kits DB-25, DBL-25, DB-50, DBL-50 - Manual (Page 10)

6. Tighten the CT assembly mounting bolts, as shown
in Figure 15. For a DB-25 breaker, tighten the 1 / 2 -13
bolts to 300 in-lb and the 3 / 8 -16 bolts to 200 in-lb.
Tighten all the CT mounting bolts on a DB-50
breaker to 200 in-lb.
7. On a DB-25 breaker, tighten the bolts on the CT
assemblies to 200 in-lb, as shown in Figure 16.
Tighten the CT assembly bolts on a DB-50 to 300 in-
lb.
WARNING: Steps 6 and 7 provide critical electrical
integrity connections. The designated bolts must be
correctly tightened for proper operation. Failure to
tighten these bolts properly will cause a breaker failure,
resulting in property damage and/or personal injury.
8. On a draw-out breaker, reinstall the load-side draw-
out fingers removed earlier.
The conversion of the back frame is now complete.
Figure 14. CT assemblies installed into the breaker.
Figure 15. Tightening the CT assembly mounting bolts.
on the rear of the breaker.
Figure 16. Tightening the CT assembly bolts.
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