12
S&C Instruction Sheet 761-515
Installation
Attaching Couplings to
Outboard Bearings
Use the following steps to attach couplings to
the outboard bearings:
Step 4
Attach pipe coupling(s) to the outboard bearing
assembly (or assemblies) in accordance with
the item numbers specified on the erection
drawing.
Attach a pipe-to-hexagon type universal cou-
pling to the hexagonal shaft on the underside of
the outboard bearing assembly. See Figure 6 as
well as Detail A-A on the erection drawing. This
coupling is used in Step 9 to attach the upper
section of vertical operating pipe.
For triangular-upright and tiered-
upright switch mounting configurations:
Attach additional pipe-to-hexagon type
universal couplings that will be used to
connect the outboard bearing assemblies.
For mounting configurations using an out-
board bearing assembly mounted between
switch poles:
The outboard bearing connects
to the interphase pipe with a drag link (flat-bar
or pipe type) and an offset coupling. See Detail
A on the erection drawing. Attach one end of
the drag link to the outboard bearing crank-
arm, then attach the offset coupling to the
other end of the drag link. See Figures 7 and 8.
Installing the Switch to the
Mounting Structure
Use the following steps to install the switch to
the mounting structure:
Step 5
WARNING
DO NOT lift the switch pole-units by rigging
on the “live parts” or subject these parts to
undue stress from slings or fall lines .
Lifting the pole-units by the live parts will
damage the switch . Rough handling may
cause damage to the blades, contacts, and/
or interrupters .
Failure to lift the pole-units properly can result
in switch damage, causing improper opera-
tion, arcing, or electrical shock .
Outboard bearing
crank-arm (adjustable)
Universal
coupling
Uppermost section
vertical operating pipe
Connecting pipe section
Clamp bolts
Outboard bearing base
Stop bolt
Figure 6. Attach the universal coupling to the switch pole rotating shaft.
Typical outboard bearing configuration, upright mounted switch poles.
Outboard
bearing base
Universal
coupling
Stop bolt
Uppermost section
vertical operating pipe
Outboard bearing
crank-arm
(adjustable)
Drag link
Offset coupling
Interphase pipe
Figure 7. Typical outboard bearing configuration, upright mounted
between switch poles, with drag link (flat-bar type).
Universal coupling
Uppermost section
vertical operating pipe
Outboard bearing base
Clamp bolts
Offset coupling
Interphase pipe
Drag link
Clevis pipe coupling
Figure 8. Typical outboard bearing configuration, vertically mounted
between switch poles, with drag link (pipe type).
