Marathon Electric DVR 2000E+ - Operating Features

15
Marathon Electric (a division of RBC Manufacturing Corp.) reserves the right to change specications and this manual without notice.
Revised 06/2011
DVR
®
2000E+ OPERATING FEATURES
Regulation Modes
The DVR
®
2000E+ provides three modes of regulation selectable through the HMI or through the Windows
®
communication software.
Automatic Voltage Regulation Modes
There are two automatic voltage regulation modes. AVR1 should be selected if the regulator is connected
for single phase voltage sensing and AVR3 should be selected if the regulator is connected for three phase
voltage sensing. In either mode, the DVR
®
2000E+ regulates the RMS generator output voltage. Regulation is
accomplishedbysensinggeneratoroutputvoltageandadjustingdcoutputexcitationcurrenttomaintainvoltage
attheregulationsetpoint.TheregulationsetpointisadjustedbytheUPandDOWNcontactinputs,throughthe
HMI or through the Windows
®
communication software. The Auxiliary Input, Droop and Under Frequency functions
may influence the regulation set point.
Field Current Regulation Mode
In Field Current Regulation (FCR) mode, the DVR
®
2000E+ maintains dc excitation current at a set level. The
regulationsetpointisadjustedbytheUPandDOWNcontactinputs,throughtheHMIorthroughtheWindows®
communication software. The Auxiliary Input function may override the regulation set point.
Auxiliary Input
Functionality of the auxiliary input is dependent on the configuration of the modes described below. The auxiliary
input is set to the Auxiliary - Off mode by default and can be set to the Auxiliary - Control or Auxiliary - Meter
modes through the HMI or the Windows
®
communication software. The effect of the auxiliary input on the set point
is displayed in the Windows
®
communication software.
Auxiliary - Off
In this mode, any signal applied to the analog input will be displayed in the Windows
®
communication software,
but will have no effect on the set point of the regulator.
Auxiliary - Control
This mode allows modification of the regulation set point by the application of a positive or negative DC voltage
acrossterminalsJ1-1(+)andJ1-12(-).Avoltageupto+/-3Vdcmaybeappliedatthisinput.Thecircuitimposes
a 2260-ohm burden on the DC source.
InAVR1orAVR3regulationmodes,theapplicationofa+/-3Vdcsignalcorrespondstoa+/-30%offsettotheset
point.ThisoffsetisnotlimitedbytheMaximumVoltageAdjusteldoftheWindows
®
communication software. For
example, with a programmed regulation set point of 480 Vrms, an input of -1 Vdc will result in a –48 Vrms offset to
the set point. Therefore the regulator will regulate to a reference voltage of 432 Vrms.
In the FCR regulation mode, the application of a 0-3 Vdc signal corresponds to a 0-3 Adc field current set point.
For example, the application of a 1.25 Vdc signal will result in a field current of 1.25 Adc.