38
11
1 2
12
1 Close latch actuator
7 Manual close arm
2 Close return spring
8 Adjusting collar &
3 Close plunger clevis
set screw
4 Close plunger
9 Manual actuating
5 Close coil
shaft
6 Positive interlock linkage 10 Adjusting plate
11 Manual close button
12 CL/MS (switch)
Figure 35. Close coil assembly -front view
9
10
3
4
5
8
6
7
1 Close coil
4 Collar & set screws
2 Manual close arm
5 Washer
3 Close plunger
6 Positive interlock arm
7 Close Plunger Clevis
Figure 36. Close coil gap adjustment -
front view
0.375” - 0.560”
6
approx. 0.187”
0.350” - 0.437”
PowerVac
®
5kV Vertical Lift
Chapter 11. Mechanical Adjustments
11-5 Close Coil Plunger
Adjustment
To adjust the close coil plunger gap (Figure 36)
The closing system is shown in Figure 35. With
the closing spring discharged, operate the
plunger to make certain that the plunger moves
freely over its full stroke in the coil. To check the
closing coil plunger gap the breaker should be
open and the closing spring charged and
gagged.
Adjusting plate (Figure 35 Item 10) is spring
loaded against the pivot for the arm-this set the
close coil actuating arm (Figure 34 Item 1). The
collar and washer (Figure 35 Item 4 & Item 5)
are assembled to the close plunger (Figure 36
Item 3) to the dimension indicated (.375”). This
is the initial adjustment.
Measure the gap between the close plunger top
clevis (Figure 36, Item 7) and the close coil hous-
ing (Figure 36, Item 1) when the attached lever
is depressed and contacts the close release le-
ver. (Varies from 0.375 - 0.560)
Release the plunger and set the plunger collar
(Figure 36, Item 4) so that the close plunger
clevis is at the previously measured gap plus
0.25.
Rotate the positive interlock lever until it reaches
18°, set the close plunger clevis gap to the close
housing
to 0.032 - 0.094 by adjusting the length
of the vertical link
descending from the posi-
tive interlock shaft.
4
3
