S&C Instruction Sheet 761-545 19
Installation
Checking Operation
STEP 27. Open and close the switch slowly through its
full travel.
WARNING
Open and close the switch slowly ONLY
when checking alignment or making
adjustments to the de-energized switch.
When opening or closing an energized
switch, swing the operating handle
vigorously through its full travel without
hesitation at any point.
Failure to operate the switch properly can
result in arcing, switch damage, serious
injury, or death.
Make sure 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 fully closed with
the blades against their blade stops. See
Figure 27.
(b) Each switch-pole operating lever should lie
against its closed stop. See Figure 28.
Figure 27. Checking that the main contacts are fully closed.
Blade stop
Blade
Main
contacts
fully
closed
Switch-pole
operating lever
Stop bolt
Figure 28. Verifying the switch-pole operating lever is within
-inch (2 mm) of the closed stop bolt.
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