ABB VM1-T Manual page 13

M E D I U M V O LTA G E P R O D U C T S
6.4.4 Withdrawal from the test/disconnected
position onto the service truck
(Figures 9/21 and 9/22)
• Open the door of the circuit breaker compartment.
• Pull out control wiring plug 36.1 and place it in the
receptacle 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/disconnected position
• Carry out the procedure as described above for
withdrawal, changing the order accordingly.
6.5 Operation of the circuit
breaker (Figures 9/16 to 9/19)
Voltage is applied when switching readiness is
indicated ("READY" lamp 2 lights up).
Please also observe the notes in section 3.1.5.
1. Closing:
By remote control, by applying a voltage to input
-MC (see also sections 10.1.1a and 6.2) or locally
by pressing ON pushbutton 3.
2. Opening:
By remote control, by applying a voltage to input
-MO1 (see also sections 10.1.1a and 6.2) or locally
by pressing OFF pushbutton 4.
3. Opening on failure of the supply voltage:
a) Initially, for a period of 180 seconds, opening
by remote control or by pressing pushbutton
4 is still possible.
b) During the subsequent period, emergency
manual opening of the breaker is possible.
Insert emergency OFF lever 28 into the
receptacle 8 on the front plate and turn it
anti-clockwise to open the circuit breaker.
First, spring 29 on lever 28 has to be
tensioned. At the end of the tensioning
motion (approx. 65° to 70°) a tangible
resistance caused by the disengagement of
the actuator armature has to be overcome.
The circuit breaker is then switched off, and
any further turns would have no effect.
4. Closing on failure of the supply voltage:
Closing is not appropriate and not possible.
5. Operating cycle and switching condition
indicators on the switching device:
After every operating cycle (ON-OFF), operating
cycle counter 5 is incremented by one full digit.
On completion of a switching operation, switch
position indicator 6 shows the current 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.
• On closing with a following opening command,
renewed closing while the closing command is
still applied is blocked. A further closing
command has to be issued for the next closing
operation.
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