Marathon Electric DVR 2000E+ - Page 45

43
is also true for VAR and PF regulation modes. Some
rounding may occur for gain values due to fixed
point arithmetic.
Regulation Modes (3c)
This panel contains a radio button for selecting the
regulation mode:
• AVR3 Regulation Mode is used for
Automatic Voltage Regulation with three-
phase generator voltage sensing.
• AVR1 Regulating Mode is used for auto-
matic voltage regulation with single phase
generator voltage sensing.
• FCR Regulation Mode is used for field
current regulation. In this mode the DVR
®
will maintain a fixed level of field current.
• VAR Regulating Mode (EC+ Only) is used
for reactive VAR regulation. This mode is
onlyenabledwhentheVAR/PF_OFFinputis
open. Otherwise, the DVR
®
will regulate as if
AVR3 mode were selected.
• PF Regulating Mode (EC+ Only) is used
for power factor regulation. This mode is
onlyenabledwhentheVAR/PF_OFFinputis
open. Otherwise, the DVR
®
will regulate as if
AVR3 mode were selected.
Number of CT’s (3d)
This panel contains a radio button for selecting the
number of CT’s to be used for current and power
measurement.
• Three (A, B, C) is used for metering of all
three phase currents independently. This
sensing mode should only be selected when
using three current transformers.
• One (B Only) is used for metering of phase
B current only. This sensing mode should
only be selected when using one current
transformer in phase B. Currents for phases
A and C will not be metered and power mea-
surements will be based on the assumption
phase B current flows equally in phases A
and C.
VR Excitation (3e)
This panel contains a radio button for disabling or
enabling excitation to the field.
• Excitation Off is used to disable excitation to
the generator exciter field. The status indi-
catorintheheader will display a gray “Off”
state. This state is recommended for making
adjustmentstoDVR
®
settings.
• Excitation On is used to enable excitation to
the generator exciter field. If the regulator
waspreviously“Off,”selectingthisstatewill
initiate a new soft start for AVR1 and AVR3
regulation modes.
Note: Any changes to DVR
®
settings made prior to
selecting “Excitation On” will be lost unless they are
saved to EEPROM. See the Header section above for
details on saving settings to EEPROM.
7
DVRPortal
™
Graphical User Interface (GUI)
GPN046 04-13.indd 43 4/5/13 10:24 AM