S&C Alduti-Rupter Instruction Sheet

22 S&C Instruction Sheet 761-545
Installation
STEP 28. Open and close the switch slowly several times.
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.
Check the operation of each switch pole. The following
conditions must be met on each phase:
• As the blade moves in the closing direction, clearance
between the blade-opening cam and the interrupter-
opening lever must be within the limit shown in
Figure 33, View A-A.
• In the fully Closed position, clearance between the
blade-closing cam and the interrupter-closing lever
must be within the limit shown in Figure 33. Also, the
clearance between the blade shunt contact and the
inter-rupter housing must be as shown in Figure 33.
• As the blade moves in the opening direction, the blade
shunt contact must rmly engage the interrupter hous-
ing before the blade disengages from the jaw contact.
(The shunt contact may be bent as required to conform
to these conditions.)
If adjustment is required, loosen the bolts that fasten
the interrupter to the jaw-contact casting and reposition
the interrupter. It also may necessary to loosen the bolts
that fasten the jaw-contact casting to its mounting bracket
and to slightly rotate the casting in order to achieve the
necessary clearances. Retighten the bolts, making sure the
blade engages the stationary contact on-center.
If any of the conditions described in this step cannot be
achieved, contact the nearest S&C Sales Office because it
is likely that damage was sustained during shipping.
Figure 33. Operating checkpoints.
Opening
lever
(interrupter
opened)
Interrupter
Opening
cam
Closing lever
Closing lever
(interrupter
closed)
Jaw-contact casting
Adjust for
equal clearance
3/16-inch (5-mm) max.
for 14.4-kV switches
¼-inch (6-mm) max.
for 25-kV switches
Opening lever
Blade assemby
3/16-inch (5-mm) max.
Closing
cam
Opening cam
Shunt contact
Mounting bracket
Interrupter housing
⅝-inch (8-mm) min.
A A
View A-A

S&C Alduti-Rupter Specifications

General

Brand	S&C
Model	Alduti-Rupter
Category	Switch
Language	English