S&C Mark VI Instructions For Installation Manual page 16

INSTALLATION
Step 18
Check operation of the blade for proper
alignment of the blade with the jaw-contact
assembly. As the blade is closed, the fault-
closing tongue contact should engage each
of the fault-closing jaw contacts with equal
pressure and the current-carrying tongue
contact should enter the current-carrying jaw
contacts with equal clearance on each side.
The silver-surfaced area of the current-car-
rying tongue contacts should center laterally
with the silver-surfaced current-carrying jaw
contacts, and the blade should rotate with
slight pressure against the blade bumper stop
and come to rest either on the stop or slightly
above it. See Figure 18.
Step 19
Close the disconnect and remove the temporary
manual operating handle.
NOTICE
If the blade angle is not attained or the
contacts are not properly aligned after
leveling the disconnect base, stop the
installation and contact S&C Electric
Company.
712-502
Blade
Figure 18. Check penetration of the blade into the jaw contact during
closing.
16
Current-carrying
tongue contacts
Current-carrying
jaw contacts
Blade bumper
stop
Fault-closing
jaw contacts
Fault-closing
tongue contacts