S&C Instruction Sheet 765-500
23
Installation
Figure 24. Loosen the blade hardware if necessary and move blade to
the fully-closed position against the bumper stop.
Checking Operation
Step 23
Open and close the interrupter switch by swing-
ing the handle slowly through its full travel.
Check to be sure that the following conditions
exist:
a. With the operating handle as far as it will go
in the closing direction, all main contacts
of the interrupter switch are in the fully-
closed position. See Figure 23.
b. With the operating handle as far as it will go
in the opening direction, the switch blades
are 90° from the closed position.
If adjustment is required, loosen the hinge-
end bolts that fasten the blade assembly
to its insulator and move the switch blade
until it is in the fully-closed position with the
blade against the bumper stop; then retighten
the bolts making sure the blade remains
in the fully-closed position. (Cypoxy insu-
lators—torque
³⁄₈
–16 hardware to 22 ft. lbs.;
porcelain insulators—torque
¹⁄₂
–13 hardware
to 55 ft. lbs.) See Figure 24.
If adjustment is required
beyond
that pro-
vided by moving the switch-blade assembly,
loosen the two clamping bolts and set screw
that fasten the coupling to the interphase rod
and rotate the switch blade until it is in the
fully-closed position. Re-tighten the clamping
bolts and set screw, making sure the interrupter
switch remains in the fully closed position.
Step 24
For 14.4 kV switches. Check the following on
each phase.
Figure 23. Make sure the jaw contact is fully-centered between the blade
contacts and that the blade contacts are against the bumper stop.
Bumper stop
Jaw contact
Blade
contacts
Summary of Contents for Omni-Rupter
Page 28: ...Printed in U S A...
