S&C Instruction Sheet 761-505
13
Installation
Installing Interphase Pipe
STEP 8.
Install the pipe sections connecting the switch
poles. See Figure 10. Follow the directions in
“Installing Pipe Couplings with Piercing Set
Screws” on page 12.
Torque the clamp bolt of each pipe-cou pling
clamp to final tightness. Then, tighten the asso-
ciated piercing set screw, piercing the pipe, and
continue turning until a firm resis tance is felt.
STEP 9.
Tighten the take-up screws of the adjustable pipe
couplings to remove all play in the inter-
connecting linkage. See Figure 11. Make sure the
switch-pole toggle mechanisms remain against
their closed stops.
Then, tighten the locknut on each adjust able
pipe-coupling take-up screw.
STEP 10.
If the bell-crank is mounted outboard of the
switch poles
: Install the pipe section connect ing
the driven arm of the bell-crank to the nearest
switch pole. See Figure 12. (If two bell-cranks
are used in a double-offset arrangement, install
the connecting pipe between them.) Follow the
directions in “Installing Pipe Couplings with
Piercing Set Screws” on page 12.
If the bell crank is mounted between switch
poles:
Connect it to the interphase pipe with the
offset coupling and drag link that were attached
to the bell-crank earlier. Follow the directions
in “Installing Pipe Couplings with Piercing Set
Screws” on page 12.
Torque the clamp bolt to final tightness. Then,
tighten the piercing set screw, piercing the pipe,
and continue turning until a firm resistance is
felt.
Figure 11. Take-up screw of adjustable pipe-coupling.
Figure 10. Pipe connecting switch poles.
Interphase pipe sections
Take-up screw
Driven arm
Figure 12. Pipe connecting bell-crank.
