Deif Multi-line 2 Designers Reference Handbook page 83

AGC
temperature. If the ambient temperature increases to a level where the cooling water coolers
decrease in cooling capacity, it will be necessary to reduce the power of the gen-set.
If the gen-set is not derated, alarms and shutdown events will very likely occur.
The derate function is typically used when cooling problems are expected.
Input selection
The derate function can be configured to one of the following inputs:
Input
Analogue input 100
PT100 input 106
PT100 input 109
VDO input 105
VDO input 106
Select the needed input in
6260 P derate
nom
.
Refer to the type label for information about engine interface selection.
Derate parameters
The parameters that define the derate characteristics are the following:
Start derate point (
6260 P derate
nom
):
This is the setting where the derating must start. The setting can be in mA (max. 20mA) or
in centigrades ºC (max 200ºC).
Slope (
6260 P derate
nom
):
Adjust the derating speed. The adjustment is in percent per unit, i.e. if the 4...20mA input is
used (analogue 100), then the derating will be in %/mA, and if the PT100/VDO input is
used, then the derating will be in %/C.
Be aware that the 4...20mA input can be configured with different minimum
and maximum settings. In this case the settings 'start derate point' and
'slope' use these new settings.
DEIF A/S
Designer's Reference Handbook
Engine interface
selection
M1 M2
X X
X
X
X
X
Page 83 of 168