Table 5.10
Parameters for a compact breaker
Parameter
Range
Default
Notes
Breaker type
•
Pulse breaker
•
Compact breaker
•
Continuous breaker
Pulse
breaker
Compact breaker
: This is a type of pulse breaker. In addition, a
compact breaker has a spring loaded opening mechanism, which must
be allowed to charge before the compact breaker is allowed to close.
To see the compact breaker parameters, you must change the breaker
type, then write the change to the controller, and refresh.
Pulse time ON
0.0 to 10.0 s
1.0 s
The length of the synchronisation pulse (that is, the maximum amount
of time that the
Breakers > [Breaker] > Control > [*B] close
output is
activated).
If the controller receives breaker closed feedback within this time, the
controller stops activating the breaker close output.
Pulse time OFF 0.0 to 10.0 s
0.5 s
During the close sequence, after spring-loading, the controller will not
send the
[*B] close
pulse until after this time has elapsed.
Spring load time 0.0 to 30.0 s
1.0 s
At the start of the close sequence, for spring loading, the controller
activates the
[*B] open
output for the
Spring load time
.
Open point (de-
loading)
1.0 to 20.0 % of
nominal power
5 %
The breaker is de-loaded when the power flowing through the breaker
is less than this set point. The nominal power is the nominal power of
the source.
Sequence diagrams
The sequence diagram below shows the sequence for closing a compact breaker.
Table 5.11
Closing a compact breaker
t2
Close
breaker
Breaker
closed
feedback
(3)
(4)
Spring-
loaded
feedback
(2)
t1
Open
breaker
(1)
t3
t1
Spring load time (
Parameters > Breakers > [Breaker]
configuration > Spring load time
)
t2
Wait after spring-loading (
Parameters > Breakers >
[Breaker] > Pulse time OFF
)
t3
Pulse on (
Parameters > Breakers > [Breaker] > Pulse time
ON
)
To close a compact breaker:
1.
Open breaker
:
Breakers > [Breaker] > Control > [*B] open
(digital output). To spring load the breaker, the controller activates this
output until there is spring loaded feedback, or for the
Spring load time
. After the breaker is spring loaded, the controller waits for
the
Pulse time OFF
.
2.
Optional: Spring loaded feedback
:
Breakers > [Breaker] > Feedback > [*B] spring loaded
(digital input). This input is activated
when the breaker is spring loaded.
3.
Close breaker
:
Breakers > [Breaker] > Control > [*B] close
(digital output). The controller activates this output until there is
breaker open feedback, or for the
Pulse time ON
.
DESIGNER'S HANDBOOK 4189340911K UK
Page 146 of 521