ABB ZS1 Instruction Manual page 60

2. Motor-operated mechanism for the earthing
switch:
• Disconnect the terminals.
• Loosen the grub-screw in the set collars.
• Withdraw operating shaft 14.1.
Observe the position of blocking disc 14.6
relative to cam 14.7!
• Replace the motor-operated mechanism.
• Slide the operating shaft through from the
front.
Observe the position of blocking disc 14.6 re-
lative to cam 14.7!
• Tighten the grub-screw in the set collars.
• Connect the control wiring.
• Set the operating mechanism manually in an
intermediate position and only then perform a
test run to determine the direction of rotation.
Ensure that the motor shuts down correctly in
the final positions!
Note:
The auxiliary switches of the interchangeable
groups are adjusted at works.
When the final installation of the earthing switch
and drive takes place on site, it may be
necessary
adjustment of the auxiliary switch. In this case,
the following should be taken into account:
• There must be a run-on of 0.5 mm in the fully
operated position before the plunger reaches
the stop (for safety reasons).
• Limit auxiliary switch 11.4 for earthing switch
ON must be operated immediately after the
dead centre position of the toggle spring
mechanism is reached in the closing process
and the automatic quick-closing process has
started.
• Limit auxiliary switch 11.3 for earthing switch
OFF must
a) be operated on earthing switches with
manual mechanisms during the opening
motion of the slide 14.2 before half of
the hexagon shaft has become visible, or
1 mm before the tongue of the slide makes
contact with the armature of the unexcited
blocking magnet.
b) be operated on earthing switches with
motor-operated mechanisms (no slide
14.2 then fitted) immediately after the
toggle spring mechanism has passed the
dead centre position during rotation to the
OFF position.
ABB Power Distribution
to undertake a further
7.5 Testing withdrawable parts with a VD4 type
circuit-breaker
(Figures 7/4 to 7/7)
When functional tests are carried out on
withdrawable
conditions listed below should also be checked.
7.5.1 Motor-driven withdrawable parts
(not standard)
Carry out testing of motor-driven withdrawable
parts in the same way as for manually operated
withdrawable part:
• Switch off the auxiliary power (m.c.b.), since the
motor could otherwise be braked electrically.
• Turn hand crank 121 in the required direction.
• Ensure that the spindle nut is correctly
lubricated.
Note:
When the withdrawable part moves, the motor
turns. The motor functions in such a case like a
generator, i.e. it can lead to reverse voltages in the
terminals.
7.5.2 Checking the correctness of dimensional settings
(Figures 7/4, 7/9 and 7/10)
1. The distance between lever 13.26 operated by
link rod 13.91 and plastic cam 13.25 should be
exact
2 +1 mm.
If adjustment is required, loose the two bolts
13.91.1 and 13.91.2. Deviations from the
specified value can have the following effects:
• Dimensions too large, blocking system for the
drive spindle deactivated.
• Dimensions too small, proper action of the
electrical interlock no longer guaranteed.
2. The distance between roller 13.24 and angle
lever 13.92 should be 0.5 mm when the circuit-
breaker is closed.
If adjustment is required, loose the two bolts
13.91.2 and 13.92.1.
7.5.3 Checking auxiliary switch settings on withdrawable
parts
(Figures 3/21, 7/4 and 7/6)
Compliance with the interlock conditions in the
test/disconnected and service position areas is
ensured by position signalling switches S8 and S9
located in the withdrawable assembly and factory-
set.
In test operations, the withdrawable part must be
moved by hand with the crank fitted with the motor
power switched off.
parts, compliance with the
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