ABB VD4 User Manual

39
Note:
In order to avoid damage to the operating
mechanism, use the original hand crank only:
– Standard version without slip clutch
– Optional version with slip clutch.
• Turn the crank clockwise according the table
until the stop is reached and the withdrawable
part is in the service position.
Note:
Do not force to move the withdrawable
breaker part (max. torque 25 Nm)!
Comply with the conditions for movement of the
withdrawable part as set out in section 8.5.6!
Number of crank turns
Panel type 12/17.5 kV 24 kV
ZS1, Powerbloc,
mounting frame 20 30
ZS8.4
without feeder
partitioning 20 25
ZS8.4
with feeder
partitioning 25 25
• Observe the position indicator.
• Remove hand crank 5 by pressing first against
the hand crank and then remove.
Note:
When removing the crank, it is essential to ensure
that the spring-loaded scene head 4.1 slides into
the untensioned front position. Spindle 4 is thus
locked in place, preventing inadvertent turning of
the spindle. Turning of the spindle opens auxiliary
switches -S8/-S9 and thus prevents the circuit-
breaker from being operated.
Note:
The withdrawable part must not be stopped at any
position in the travel range between the service
position and test/disconnected position!
7.3.2 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 in the service and test
positions. For deblocking, see section 8.5.6.
7.3.3 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.
As a precondition for an auto-reclosing sequence,
the operating mechanism is either (re-)charged
after a closing operation automatically by the
charging motor, or it requires (re-)charging by
hand if the operating mechanism is of the manual
type.
Emergency manual operation:
Emergency manual operation is carried out with the
hand crank 5 on the spindle mechanism 4, in a
similar manner to operation of a withdrawable
breaker part with manual systems:
• Turn off the supply voltage (m.c.b.), since the
motor would otherwise be braked electrically.
• Turn hand crank 5 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 device must not be
changed from the specified type and rated
value, or the behaviour of the permanent magnet
motor could be irreversibly impaired
7.3.4 Withdrawal from the test/disconnected position
onto the service truck
• Open the door of the circuit-breaker compartment.
• Release control wiring plug 8.1 and engage it in
the storage position on the withdrawable part.
• Position service truck 48 with the guide pins
48.2 of the adjustable bench top at the correct
height facing the panel front, and allow catch
48.3 to engage.
• Move sliding handles 3.1 inwards against the
springs to release withdrawable part 1, withdraw
onto the service truck and secure it in the
catches on the truck.
• Press the release lever (at the front underneath
the bench top) and release the service truck
from the panel.

ABB VD4 Specifications

General

Brand	ABB
Model	VD4
Category	Industrial Equipment
Language	English