ABB UniGear ZS1 Installation, Operation And Maintenance Instructions Manual page 43

O P E R A T I O N O F T H E S W I T C H G E A R
Important note:
The insertion and withdrawal of
circuit-breakers (and other withdrawable
parts) must be gradual to avoid any shocks
that could deform the mechanical interlock.
If any operations are prevented, do not
force the interlocks and check that the
operating sequence is correct. The force
normally applicable to the insertion/
withdrawing lever is 260 N. In any case,
the maximum applicable force must never
exceed 400 N. Please refer to the
circuit-breaker technical documentation
for installation operations.
Caution
Insertion and withdrawal must always be carried
out with the apparatus open!
In the event of an auxiliary voltage drop, do not
use force to move the withdrawable parts with
locking magnets Y0 or RL2. After a voltage drop
has occurred, the magnets are locked along the
entire travel range between the service and test
positions. To remove the interlock, consult the
circuit-breaker technical documentation.
121
—
Figure 63 Movement of the withdrawable part
between the test/ disconnected
position and the service position:
clockwise up to the stop for service
position and anticlockwise for the
test/disconnected position
121 Hand crank
Withdrawal from the test/disconnected position
onto the service truck:
• Open the door of the circuit-breaker
compartment
• Release the control wiring plug and place it in
the storage position on the withdrawable part
• Position the service truck, with the adjustable
bench-top guide pins, at the correct height
facing the panel front and allow the catch to
engage (Fig. 67)
• Move the sliding handles inwards against the
springs to release the withdrawable part. Draw
the withdrawable part out onto the service
truck and secure it in the catches on the truck
(Fig. 68)
• Press the release lever - positioned at the front
underneath the bench top - and release the
service truck from the switchgear panel
• Insertion from the service truck into the test/
disconnected position
• Carry out the procedure described above for
withdrawal in reverse order
124.2
124.3
—
Figure 64 Positioning the service truck
with the guide pins on the
adjustable - height bench top
at the correct height for approach
to the switchgear panel and
engaging the catch
124.2 Guide pin
124.3 Catch pin
—
Figure 65 Service truck engaged with the
switchgear panel. Withdrawable
part released for removal with the
handles slid inwards
13 Withdrawable part
13.11 Sliding handle
124 Service truck
43
13
13.11
124