If the two solutions are used together, both requirements are to be met before closing of the breaker is al-
lowed.
Breaker LED indication
To alert the user that the breaker close sequence has been initiated but is waiting for permission to give the
close command, the LED indication for the breaker will be flashing yellow in this case.
If the breaker needs time to reload the spring after it has opened, then the AGC can take this delay into ac-
count. This can be controlled through timers in the AGC or through digital feedbacks from the breaker, de-
pending on the breaker type.
6.5.1 Principle
The diagram shows an example where a single AGC in island mode is controlled by the AUTO start/stop in-
put.
This is what happens: When the AUTO start/stop input deactivates, the GB opens. The AUTO start/stop is
reactivated immediately after the GB has opened, e.g. by the operator through a switch in the switchboard.
However, the AGC waits a while before it issues the close signal again, because the spring load time must
expire (or the digital input must be activated - not shown in this example). Then the AGC issues the close
signal.
Spring load time
GB closed
GB open
Auto Start/stop ON
Auto Start/stop OFF
t [sec]
6.6 Alarm inhibit
In order to select when the alarms are to be active, a configurable inhibit setting for each alarm has been
made. The inhibit functionality is a way to make an alarm inactive when the events, chosen in the menu be-
low, are active. The inhibit functionality is only available via the PC utility software. For each alarm, there is a
drop-down window where it is possible to select which signals have to be present in order to inhibit the alarm.
AGC 100 Designer's Reference Handbook
4189340766 UK
Additional functions
DEIF A/S Page 53 of 152
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