S&C Omni-Rupter, Installation Manual

S&C Instruction Sheet 765-500

13

Installation

Installing the Operating Handle 

Step 11

a

Install the operating-handle assembly on the 
lowest section of vertical operating pipe at the 
location indicated on the erection drawing. 
Make certain the cutting tip of the piercing set 
screw in the operating-handle assembly does 
not protrude through the clamp when install-
ing the assembly on the vertical operating 
pipe. After the operating-handle assembly is 
in place, tighten the piercing set screw on the 
operating-handle assembly, piercing the pipe, 
and continue turning until a firm resistance is 
felt. See Figure 8.

Slide the foot bearing assembly onto the 

lowest vertical-operating-pipe section and bolt 
it to the pole at the position shown on the erec-
tion drawing. At the same time, use one of the 
mounting bolts to attach one end of the ground-
ing strap (the end with the grounding connector 
attached) to the foot bearing assembly.

d

If necessary to compensate for the taper of the 
wood pole, and to keep the vertical operating 
pipe aligned and plumb, shift the guide bear-
ings toward or away from the pole. Alignment 
slots are provided for this purpose. See Figures 
6 and 7.

Step 12

Fasten the free end of the grounding strap to 
the lowest vertical-operating-pipe section a few 
inches above the operating-handle assembly (or 
key interlock) with the U-bolt connector pro-
vided for this purpose. 

Then connect the lower 

end of the strap to a suitable earth ground,

fusing the grounding connector provided at that 
end of the strap.

d

 See Figure 8.

Step 13

Open and close the interrupter switch slowly 
to see that no operating difficulties are encoun-
tered due to undetected damage in shipping. 
(This applies only when checking for alignment 
and complete closure; when in service the inter-
rupter switch should be opened or closed vigor-
ously through its full travel without hesitation 
at any point. Be prepared to apply additional 
force to maintain full speed when operating 
effort increases as the switch blades engage 
the interrupters.)

a

  When a key interlock is furnished (Standard Minor 

Modification Suffix “-S6”), refer to Step 21 at this point .

d

  The grounding recommendations herein may differ 

from the standard operating and safety procedures of cer-

tain electric utility companies . Where a discrepancy exists, 

the operating procedures of the electric utility apply .

Figure 8. Foot bearing assembly and operating-handle assembly.

Vertical-operating-pipe 
section

Swing-away hasps for 
padlocking

Handle

Foot bearing support plate

Piercing set screw

Gaining channel (used  
on round poles only)

Grounding connector (for earth  
ground connection—see text)

d

Grounding strap