22
S&C Instruction Sheet 765-500
Installation
b. Install the operating-handle assembly on
the lowest section of vertical operating pipe
at the location indicated in the erection
drawing. Make certain the cutting tip of the
piercing set screw in the operating-handle
assembly does not protrude when installing
the assembly on the vertical operating pipe.
After the operating handle 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 21.
c. Attach the interlock bracket to the foot bear-
ing assembly, using the
¹⁄₂
–13
1
screws and
lockwashers furnished.
d. Attach the key interlock to the interlock
bracket and extend the bolt.
e. With the interrupter switch in the closed
position, use the interlock bolt to position
the locking disc so that the bolt enters the
closed-position slot in the disc (and will
enter the open-position slot when the switch
is in the open position). Hold the locking
disc
³⁄₈
inch below the interlock bracket (see
Figure 22) and drill
⁷⁄₁₆
-inch holes through
the vertical-operating-pipe section, using
the holes in the locking-disc collar as pilots.
Attach the locking disc to the pipe, using
the
³⁄₈
–16
3 bolt, nut, and lockwasher
furnished.
f. Block one of the two slots in the locking disc
with the blocking screw provided. The slot
to be blocked will be determined by whether
a locked-open or locked-closed arrangement
is required.
NOTICE
Key interlocks are intended for proper
sequencing of switching operations; they
are not intended to provide security. The
operating-handle assembly includes swing-
away hasps for padlocking the interrupter
switch in either the open or closed position.
Complete the operating-handle installation
as directed in Steps 10 through l4. Proceed to
page 23 for instructions on checking switch
operation and adjustment.
Figure 22. Key-interlock group detail.
Locking disc
Interlock bracket
Figure 21. Foot bearing assembly and operating-handle assembly.
Handle
Piercing set screws
Summary of Contents for Omni-Rupter
Page 28: ...Printed in U S A...
