Siemens Type Vector E50001-F710-A420-X-4A00 - Manual (Page 13)

Operating handle adjustment procedure
Operating handle adjustment procedure
The next series of steps address adjusting
the position of the handle assembly and
lock segment assembly so that the handle
can be inserted into the OPEN and CLOSED
slot correctly.
Important: It is extremely important to
adjust the handle position so it is
impossible to place the operating handle in
the CLOSED slot unless the air switch
blades are fully closed. An operator may
not be able to check the blades visually to
verify the air switch is fully closed at night
and/or under severe weather conditions.
Therefore, it should take considerable
wind-up (torsion) of the vertical pipe to
get the handle in position to force it into
the CLOSED slot. Remember that as the air
switch gets older, it will become harder to
operate and more force will be required on
the operating handle to completely close
the air switch.
The operator must apply
sufficient force to completely close the
air switch.
1. Adjust the CLOSED and OPEN segments
on the lock segment assembly such
that they are approximately 90°/100°
apart, with adjustment still left in the
slots in each direction. Tighten the
bolts loosened under Installation
instructions item 10 on page 12.
Note: Before tightening bolts, put the end
of the ground strap from the handle
assembly under the flat washer on the
bolt. Leave enough slack in the ground
strap to allow the operating handle to
travel fully from the OPEN position to the
CLOSE position without any interference
(refer to Figure 7: Operating handle).
2. The handle casting should be mounted
4" (102 mm) to 6" (152 mm) above the
lock segment assembly. Position the
handle casting so that with the air
switch closed (blades tight against the
spacer), the operating handle will
strike point A on the lock segment
assembly when the operating handle is
lowered (refer to Figure 7: Operating
handle). This will assure that when the
air switch is fully closed, it will take
considerable wind-up torque to get the
operating handle into the CLOSED slot
on the lock segment assembly.
3. Tighten the four clamp bolts. Do not
tighten the piercing set screws yet.
Open and close the air switch slowly
and then rapidly. Check for a smooth
operation of the air switch. Adjust the
pipe guides for a smooth, non-binding
operation and tighten down both bolts
in each pipe guide assembly. Make sure
that the air switch can be fully opened
and fully closed (blade tightly up
against the jaw contact spacer on all
three phases).
4. Verify that the air switch handle will
strike point A of the lock segment
assembly and that considerable wind-
up torque is needed to get the air
switch operating handle into the
CLOSED slot of the lock segment
assembly.
5. If needed, reposition the handle
casting by loosening and re-tightening
the four clamp bolts until the operation
of the air switch meets the
requirements described in steps 3, 4
and 5. Adjustments may also be made
by moving the lock segment slightly on
the lock segment assembly.
6. After the handle casting is in the final,
properly adjusted position, verify the
four clamp bolts are fully tightened.
Then, tighten both piercing set
screws until each screw pierces
through the wall of the pipe.
Note: When tightening these piercing set
screws, the resistance will keep increasing
and then will drop off sharply once the
pipe is pierced. Fully tighten the piercing
set screws until the shoulder of the
piercing set screw is firmly placed against
the pipe (refer to Figure 8: After piercing).
7. The piercing set screws help assure
that when the air switch handle is
thrown open or closed, the vertical
pipe will definitely rotate with the
handle.
8. Ground the lock segment/handle
assembly to the pole ground using a #2
or larger flexible copper wire (refer to
Figure 9: Grounding).
Figure 7: Operating handle
Item Description
A Point A
B Operating handle
A
B
Figure 8: Before piercing
Item Description
A Slug from pierced
pipe
A
After piercing
Item Description
A #2 pole ground wire
or larger
B Split-bolt connector
C Pole
Figure 9: Grounding
A
A
B
C
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