Effective October, 2000
Page 14
E. With the Breaker in the OPEN position and with
the Breaker Closing Springs DISCHARGED,
slide the Trip Finger (attached to the Breaker
Trip Bar in Step 7-A) over so that it is located
under the left hand side of the DTA flange nut.
F. Position trip finger with a HORIZONTAL GAP of
0.03" to 0.12" to the DTA shaft.
G. Tighten trip finger mounting hardware. Recheck
horizontal gap and reposition the Trip Finger if
necessary.
H. Verify DTA Assembly is reset. Manually reset if
necessary.
DO NOT apply more than 5 lbs. force to the end
of the Reset Spring when manually resetting.
Excessive force can bend the springs, resulting
in a failure of the DTA Assembly to reset during
normal operation.
I.
Close the breaker.
B. Position the DTA Assembly near the front of the
Breaker. Route the DTA Extension Harness
from the Aux. CT Module under the front of the
Breaker to the 2-Point Terminal Block mounted
on the DTA Assembly. Connect the “+” wire of
the DTA Extension Harness to the same
terminal as the DTA Wire marked “+”. Connect
the unmarked wire of the DTA Extension
Harness to the same terminal as the unmarked
DTA Wire.
C. Carefully tilt the Breaker back and slide the DTA
Assembly under the front of the Breaker.
Position the DTA Assembly near the left front of
the Breaker with the 2-Point Terminal Block
facing the rear of the Breaker. Lower the front of
the Breaker, being careful not to damage the
DTA Assembly.
D. Align the DTA Assembly with the existing holes
near the bottom front of the Left Breaker Frame.
Apply Loc-Tite
®
242 to the threads then secure
the DTA Assembly, as shown, using the (2)
.375-16
×
1.00" bolts, (4) flat washers, (2) lock
washers, and (2) nuts supplied.
Note: On some breakers, a Ground Shoe may
have been mounted to the holes used to
mount the DTA Assembly. When mounting the
DTA Assembly, the Ground Shoe MUST BE
reinstalled and secured to the Breaker using
the ORGINAL mounting hardware.
WARNING
HORIZONTAL
GAP
HORIZONTAL
GAP
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