ABB ZS1 Instruction Manual page 44

• Check that the relevant conductors are in-phase,
as far as necessary when several incoming
feeder cables and switchgear sections are
concerned (see also section 6.3.2).
• Carry out all measurements and check all
functions dependent on the high-voltage power
supply being connected.
• Watch out for irregularities of any kind.
6.2 Switching operations
Perform switching operations with the front doors
shut.
6.2.1 Withdrawable circuit-breaker part
(Figures 6/1, 6/5 to 6/7 and 6/9 to 6/11)
Manual insertion from the test/disconnected
position to the service position:
• Connect control wiring plug 10.2.
• Close the front door.
• Ensure that the circuit-breaker is in the OFF
position.
• Fit hand crank 121 on square spigot 18.1 of the
spindle mechanism 18.
• Turn the crank clockwise through approx. 20
turns until the stop is reached and the
withdrawable part 13 is in the service position.
• Observe the position indicator.
• Remove hand crank 121.
It has to be considered that the spring loaded piece
of scenery 18.2 will lie completely on the rear side
of the panel door when the hand crank will be
moved from the square spigot 18.1 of the spindle
mechanism 18. This ensures that the rear part of
the scenery has been shift on the hexagon cap of
the spindle and prevents the unintentional
wrenching of the spindle during the service of the
panel. The wrenching may lead to a blocking of the
circuit-breaker.
Note:
The withdrawable part must not be stopped at any
position in the travel range between the service
position and test/disconnected position!
Manual withdrawal from the service position into
the test/disconnected position:
• Ensure that the circuit-breaker is in the OFF
position.
• Reverse the procedure described above for
insertion into the service position.
Note:
Withdrawable parts with blocking magnet Y0 may
not be forcibly moved during power failures. In
such a case they are blocked along the whole travel
range between the service and test positions. For
deblocking, see section 7.5.5.
ABB Power Distribution
Motor-driven movement of the withdrawable part:
• Briefly operate the electrical control for insertion
or withdrawal (the withdrawable part then
automatically moves into the opposite position).
• Observe the position indicator.
Note:
When the motor fails, the withdrawable part can be
moved in emergency manual operation. If the drive
motor fails during movement of the withdrawable
part, the withdrawable part must be moved into a
limit position in emergency manual operation.
Emergency manual operation is carried out with the
hand crank 121 on the spindle mechanism 18, in a
similar manner to operation of a withdrawable
breaker part with manual systems:
• Switch off the auxiliary power (m.c.b.), since the
motor would otherwise be braked electrically.
• Turn hand crank 121 in the required direction.
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.
The motor protection by fuse must not be changed
from the specified type and rated value, or the
behaviour of the permanent magnet motor could
be irreversibly impaired!
Caution:
On emergency manual operation of a motor-driven
withdrawable circuit-breaker part, the interlock
with a motor operated earthing switch could not
be effective! The interlock is always effective with a
manual operated earthing switch.
Withdrawal from the test/disconnected position
onto the service truck:
• Open the door of the circuit-breaker compartment.
• Release control wiring plug 10.2 and engage it in
the storage position on the withdrawable part.
• Position service truck 124 with the guide pins
124.2 of the adjustable bench top at the correct
height facing the panel front, and allow catch
124.3 to engage.
• Move sliding handles 13.11 inwards against the
springs to release withdrawable part 13,
withdraw onto the service truck and secure it in
the catches on the truck.
• Press the release lever 124.4 (at the front
underneath the bench top) and release the
service truck from the panel.
• Secure the shutter(s) in position as required with
the padlock.
Insertion from the service truck into the test/
disconnected position:
• Carry out the procedure as described above for
withdrawal, changing the order accordingly.
45