Siemens Type Vector Buku Petunjuk - Halaman 15
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Halaman Cetak2. As the blade continues to rotate
open, the interrupter lever
must make full metal-to-metal
contact with the contactor
(refer to Figure 13: Contactor
connection). At this point, the
load then transfers from the
auxiliary contacts to the
interrupter's lever arm so that
the interrupter now carries the
full load.
3. As the blade continues to rotate
open, the interrupter will trip
thus interrupting the load. The
interrupter must trip while the
lever arm is in metal-to-metal
contact with the contactor. The
interrupter should trip (fire)
before the contactor is within
1/2" (12.7 mm) to 3/4" (19 mm)
of the end of the lever (refer to
Figure 14: Contactor space).
4. Continue to open the switch
until the interrupter lever has
cleared the end of the nylon
push bar, the lever will spring
back slightly. This allows the
nylon bumper of the contactor
assembly to engage the lever
and lift the lever into position,
when the switch is being
closed. Open the switch fully.
4. Now, close the switch slowly. The
following operations and checks
should be made:
a) As the blade rotates closed, the push
bar must pick up the lever at least
1/2" (12.7 mm) from the end of the
lever (refer to Figure 15: Lever pick
up).
b) Continue to close the blade, when
the lever is at 90° to the interrupter,
the push bar should be at least 1/2"
(12.7 mm) from the side of the yoke.
At no time during the closing of the
switch should the push bar touch
the connecting rod or yoke (refer to
Figure 16: Push bar).
c) Close the switch completely and
verify that the interrupter resets
(cocks) for the next opening
operation.
Operational check out instructions
A
Item
A
Figure 13: Contactor connection
A
B
Item
A
1/2" (12.7 mm) to 3/4" (19 mm)
B
Figure 15: Lever pick up
d) In the fully closed position, the lever
should rest on the bumper, and stick
above the bumper at least 1/8"
(3.2 mm) (refer to Figure 17: Lever
position).
e) These adjustment checks should be
repeated on each independent
switch blade/phase.
5. The switch is now ready for installation
of the conductors.
Description
Contactor
Description
Nylon push bar
A
Item
Description
A
1/2" (12.7 mm) to
3/4" (19 mm)
Figure 14: Contactor space
A
Item
Description
A
1/2" (12.7 mm) to
3/4" (19 mm)
Figure 16: Push bar
A
B
Item
Description
A
Air gap
B
Bumper
Figure 17: Lever position
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