Installing Terminal Pads And Conductor; Installing The Terminal Pad - S&C Mark VI Instructions For Installation Manual

Installing the Terminal Pad

Repeat Steps 64 through 68 for each pole-unit.
Ç CAUTION
DO NOT exceed the terminal pad loading
limits outlined in S&C Data Bulletin 712-60.
Failure to do so can result in damage to the
Mark VI Circuit-Switcher.
Step 64
Remove the lifting bracket from the interrupter.
Make sure all packing material has been
removed from the top of the interrupter. See
Figure 64.
Ç
CAUTION
The lifting brackets must be removed before
energizing the Mark VI Circuit-Switcher.
Failure to do so can result in damage to the
interrupters.
Step 65
Prepare the interrupter terminal pad attachment
as follows:
a. Thoroughly clean the terminal pad using a
soft cloth.
b. Thoroughly wire-brush the appropriate set
of holes on the interrupter casting.
c. Immediately apply a liberal coating of Burndy
Penetrox A or other suitable aluminum con-
nector compound to the clean surfaces.
d. Apply Penetrox A to the threads of two
¹⁄₂–13
1 hex-head stainless-steel cap
screws furnished.
e. Attach the terminal pad to the appropriate set
of tapped holes on the interrupter. Tighten
the screws to a torque of 40 to 50 ft.-lbs. See
Figure 65.

INSTALLING TERMINAL PADS AND CONDUCTOR

Lifting bracket
Figure 64. Remove the lifting bracket.
Upper
terminal pad
Figure 65. Bolt the upper terminal pad to the interrupter.
47
¹⁄₂–13
1 hex-head
stainless-steel cap
screws and lockwashers
Bolts
712-502