Circuit Breaker Operation - ABB VM1 Manual

VM1 - INSTRUCTION MANUAL BA 504/05 E
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6. Commissioning / Operation
6.5
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
2. Opening:
• Remote control by applying a voltage to input
3. Opening in case of power failure:
a) Opening via the remote control system or by
b) Manual emergency opening is possible

Circuit breaker operation

(Figures 9/17 to 9/21)
-MC (see sections 10.1.1a and 6.2) or locally by
pressing ON pushbutton 3.
-M01 (see also sections 10.1.1a and 6.2) or
locally by pressing OFF push-button 4.
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.
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 position. If an
automatic switch-off is desired
immediately on expiry of the times stated
under 3a), this behaviour can be effected
by cactivating 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 switching device:
After each operating cycle (ON-OFF), the
operating cycle counter 5 is incremented by
one full digit.
On termination of a switching operation, the
position indicator 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.