Withdrawal From The Test/Disconnected Position Onto The Service Truck; Insertion From The Service Truck Into The Test/Disconnected Position; Circuit-Breaker Operation - ABB VM1 Instruction Manual

Emergency manual operation:
Emergency manual operation is carried out with the hand
crank 38 on the spindle mechanism 35.1, in a similar man-
ner 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 38 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!
6.4.4 Withdrawal from the test/disconnected position onto
the service truck
(Figures 9/22 and 9/23)
- Open the door of the circuit-breaker compartment.
- Pull out control wiring plug 36.1 and place it in the recep-
tacle provided.
- Position service truck 40 with the guide pins 40.2 of the
adjustable bench top at the correct height facing the panel
front, and allow catch 40.3 to engage.
- Move sliding handles 35.3 inwards against the springs to
release withdrawable part 31, 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.
6.4.5 Insertion from the service truck into the test/discon-
nected position
- Carry out the procedure as described above for withdraw-
al, changing the order accordingly.
6.5

Circuit-breaker operation

(Figures 9/17 to 9/21)
The power supply has been established when the "READY"
lamp 2 lights up.
Please also note the remarks in Section 3.1.5.
1. Closing:
Remote control by applying a voltage to input -MC (see
sections 10.1.1a and 6.2) or locally by pressing ON push-
button 3.
2. Opening:
Remote control by applying a voltage to input -M01
(see also sections 10.1.1a and 6.2) or locally by pressing
OFF push-button 4.
14 VM1 Vacuum circuit-breaker | Instruction manual 504/05
3. Opening in case of power failure:
a) Opening via the remote control system or by pressing
push-button 4 is initially still possible:
- up to 60 seconds for breaking currents up to 25 kA
- up to 120 seconds for breaking currents up to
31.5 kA.
b) Manual emergency opening is possible beyond these
times.
Insert emergency manual operation lever 28 into socket
8 in the front plate and turn it anti-clockwise to open the
circuit-breaker.
During this the auxiliary spring 29 on the lever 28 will be
charged at first. After a movement of about 65° to 70°
a resistance must be overcome which is generated from
the removal of the armature in the actuator. Then the
circuit-breaker is swiched off. A further rotation will be a
free movement.
c) On power failure and after expiry of the times stated
under 3a), the circuit-breaker remains in its current posi-
tion. If an automatic switch-off is desired immediately on
expiry of the times stated under 3a), this behaviour can
be effected by activating DIP switch I 1004/1 (see figure
9/16a, "AUTO-OFF on declining capacitor voltage").
4. Closing on failure of the supply voltage:
Closing is not appropriate and not possible.
5. Operating cycle and position indicators on the swit-
ching device:
After each operating cycle (ON-OFF), the oper at ing cycle
counter 5 is incremented by one full digit.
On termination of a switching operation, the position indi-
cator 6 displays the relevant switch position.
6. Anti-pumping system:
- The circuit-breaker controller ensures that closing of the
circuit-breaker is blocked when an opening command is
active.
- When closing on a subsequent opening command,
further closing with the still active closing command is
blocked. The closing command must be issued again for
the next closing operation.