Step 56
The lower bypass blade assembly uses two sets
of mounting holes and has an integral terminal
pad that should be used in place of mounting
a terminal pad to one of the sets of pole-unit
mounting bosses. Spacers are required between
the blade assembly and the pole-unit and are
furnished with the mounting hardware. An
aluminum connector compound can be used
to temporarily “glue” the spacers in place while
the blade assembly is being installed.
Using the four
Z\x
–
13
3
1
hex-head stainless-
steel cap screws and
Z\x
-inch stainless-steel lock
washers furnished, attach lower bypass blade
assembly to the appropriate sets of tapped
holes on the pole-unit. Tighten the screws to a
torque of 40 to 45 ft.-lbs. See
Figures 62 and 63
on page 32.
Step 57
After the bypass is mounted to the pole-unit,
disengage the blade from the upper contact
fingers and verify that the centerline of the
blade assembly has not shifted by more than
Z\,
0
from the center line of the contact fingers.
See Figure 63. If the blade assembly needs
adjustment, loosen the hinge support and blade
stop bracket hardware. See Figure 64. Center
the blade between upper contact fingers while
maintaining
B\zn
0
clearance from top of blade.
Tighten hinge support and blade stop bracket
hardware to 55 ft-lbs.
Operation
Step 58
To open,
pull the blade down fully using a S&C
Substation Prong or other heavy duty hook
stick tool. Support the blade during its travel.
Do not let the blade fall or bounce. Once fully
open the blade should be horizontal to the
ground, approximately 90
°
from the pole-unit.
See Figure 65.
To close,
engage the hook stick with the blade
pull ring and swing the blade assembly to within
two or three inches of the jaw-contact assembly.
Then move the blade assembly sharply to the
closed position. See Figure 64.
Step 59
If adjustment is necessary, loosen and shift
blade stop bracket hardware only.
Installing Optional Bypass Accessory
Figure 64. Center blade between contacts. Blade in bypass position.
Blade should be
centered between
contacts
Figure 65. Bypass in open position.
S&C Instruction Sheet 731-502
33