Time
0
% of nominal
voltage
100
GB open
Voltage rerun
level (2265)
Voltage
discharge
(2264)
New start
request GB close
CBE Break Lim
(2252) expired
In the diagram above, the excitation is ON during cooldown. Then a new start request is made, which means that the excitation will
be shut off. When the excitation is shut off, the voltage discharge timer starts.
Comparing the two situations shows that the first example is the fastest. This is because the excitation is already off when the next
start request appears. If the new start request had appeared a little later, the voltage discharge timer could already have expired.
This means that the generator breaker could have closed very shortly after the new start request.
Parameter
Item Range Default Note
2264 Voltage discharge timer
1.0 s
20.0 s
5.0 s
Parameter is not shared
between gensets!
5.5 Separate synchronising relay
When the AGC gives the synchronising command, then the relays on terminal 17/18/19 (generator breaker) and terminal 11/12/13
(mains breaker) will activate, and the breaker must close when this relay output is activated.
This default function can be modified using a digital input and extra relay outputs depending on the required function. The relay
selection is made in the menu 2240, and the input is selected in the input settings in the utility software.
The table below describes the possibilities.
DESIGNER'S HANDBOOK 4189341275A EN Page 96 of 196
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