Setting Description Comment
Maximum df
2032
Maximum dU
The maximum allowed voltage difference between the
busbar/mains and the generator.
+/- value related to the nominal generator voltage.
2033
Closing window
The size of the window where the synchronisation pulse can
be released.
+/- value.
2034
Static sync
Minimum time inside the phase window before sending a
close command.
2035
Static type GB
"Breaker" or "Infinite sync" can be chosen.
"Infinite sync" will close the MB to the busbar and
run the generator in sync with the mains. The GB
is not allowed to close.
2036
Static type MB
"Breaker" or "Infinite sync" can be chosen.
"Infinite sync" will close the GB to the busbar and
run the generator in sync with the mains. The MB
is not allowed to close.
2061
Phase K
P
Adjustment of the proportional factor of the PI phase
controller.
Only used during analogue regulation output.
2062
Phase K
I
Adjustment of the integral factor of the PI phase controller.
2070
Phase K
P
Adjustment of the proportional factor of the PI phase
controller.
Only used during relay regulation output.
5.4 Close before excitation
It is possible to adjust the AGC to start up the genset with the excitation switched off. When the gensets are started up, the breakers
will be closed and the excitation started. It is also possible to close the breaker before the engine is started. This function is called
Close Before Excitation (CBE).
The purpose of close before excitation is that the gensets are able to be ready for the load very quickly. All of the gensets will be
connected to the busbar as soon as they are started, and as soon as the excitation is switched on, the gensets are ready for
operation. This is faster than the normal synchronising, because in that case the breakers will not be closed until the generator
voltage is in the synchronised position, and it takes some time to achieve that position.
The close before excitation function can also be used if the load requires a soft start. This can be the case when the gensets
connect to a transformer.
As soon as the excitation is activated, the generators will equalise the voltage and frequency and will eventually run in a
synchronised system. When the excitation is activated, the regulators of the AGC will be switched on after an adjustable delay.
The function can be used in a single AGC, and also in AGCs with option G5.
INFO
The excitation must be increased slowly when this function is used.
INFO
This function can only be used with a magnetic pickup (MPU) or EIC speed signal.
The principle is described in the flowcharts below.
Flowchart abbreviations
• Delay 1 = Parameter 2252
• Delay 2 = Parameter 2262
DESIGNER'S HANDBOOK 4189341275A EN Page 90 of 196
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