Parameter Range
Nominal setting
1
Nominal setting
2
Nominal setting
3
Nominal setting
4
Notes
Nominal (4th) 1 A to 9 kA 867 A 345 A 345 A 345 A
The maximum 4th current
flow during normal
operation.
Current transformer
You can configure the 4th current input current transformer under Configure > Parameters > Local > 4th current input > Current
transformer (I4). You must set these parameters if there is a current transformer on the 4th current input measurement.
More information
See the Installation instructions for examples of 4th current input wiring for the neutral phase.
Parameter Range Default Notes
Primary (I4) 5 A to 9 kA 1 kA The current transformer primary side (measurement side) nominal current.
Secondary (I4) 1 or 5 A 1 A
The current transformer secondary side (controller side) nominal current. You can select
either 1 A or 5 A.
3.2 Nominal settings
3.2.1 General information on nominal settings
The controller nominal settings are used in a number of key functions. These include power management and protections. Many
protection settings are based on a percentage of the nominal settings.
Each controller can store four sets of nominal settings. You can easily change the active set of nominal settings by changing the
parameter, using a digital input, analogue input, or an external source (for example, Modbus).
INFO
Always check that the conditions are safe to change the nominal settings. Changing nominal settings while a genset is
running with a load could lead to unexpected actions. For example, the generator breaker can trip due to an under
frequency alarm when changing the nominal frequency from 50 Hz to 60 Hz.
The nominal settings for the controller are mainly the alternating current (AC) settings. Changing the nominal settings set also
changes the engine nominal speed, and analogue governor and AVR offsets.
More information
See the each controller type for more information about the nominal settings and regulation for more information about
the analogue regulator offsets.
This is how the AC measurements on the ACM3.1 module relate to the controller types:
DESIGNER'S HANDBOOK 4189340911K UK Page 51 of 521
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