Marathon Electric DVR 2000E+ - Section 3: Features and Protection

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Fault Output Contact
A fault output contact is provided through terminals
J1-6 and J1-7. This normally-open, form-A contact
closes in the event of a protective shutdown.
DVR
®
OPERATING FEATURES
Regulation Modes
The DVR
®
2000E+ provides three modes of regulation
selectable through the HMI or through DVRPortal™.
The DVR2000EC+ adds two more regulation modes.
Automatic Voltage Regulation Modes
There are two automatic voltage regulation modes.
AVR1 should be selected if the regulator is con-
nected 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
®
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viatheUP
andDOWNcontactinputs,theauxiliaryinput(when
enabled), the HMI or DVRPortal™. The Droop and
UnderFrequencyfunctionsmayinfluencetheregu-
lation set point.
Field Current Regulation Mode
In FCR mode, the DVR
®
maintains DC excitation
current at a commanded level. The regulation set
point is adjusted via the UP and DOWN contact
inputs, the auxiliary input (when enabled), the HMI or
DVRPortal™.
Reactive Power Regulation Mode (EC+ only)
In Reactive Power Regulation (VAR) mode, the DVR
®
maintains the generator’s reactive power at a com-
manded level.The regulation set point is adjusted
via the UP and DOWN contact inputs, the auxiliary
input (when enabled), the HMI or DVRPortal™. This
mode can only be entered by selecting “VAR” as
the regulation mode and opening the VAR/PF_OFF
contact input.
Power Factor Regulation Mode (EC+ Only)
In Power Factor Regulation (PF) mode, the DVR
®
maintains the generator’s power factor at a com-
manded level.The regulation set point is adjusted
via the UP and DOWN contact inputs, the auxiliary
input (when enabled), the HMI or DVRPortal™. This
modecanonlybeenteredbyselecting“PF”asthe
regulation mode andopeningtheVAR/PF_OFFcon-
tact input.
Auxiliary Input
NOTE: If the DC voltage is removed from the aux-
iliary input, the operating set point will no longer
be modified and the regulator will regulate to the
programmed regulation set point.
Functionality of the auxiliary input is dependent on
the configuration of the modes described below. The
auxiliary input can be set to Off, Control1, Control2
or Meter modes through the HMI or DVRPortal™.
The effect of the auxiliary input on the set point is
displayed in DVRPortal™.
Auxiliary – Off
In this mode, any signal applied to the auxiliary input
will be displayed in DVRPortal™, but will have no
effect on the set point of the regulator.
Auxiliary – Control1
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.
When in AVR3 or AVR1:
The application of a +/- 3.000 Vdc signal corre-
spondstoapercentageoffsetofupto+/-30.0%to
the set point.
Example: A programmed regulation set point of 480
Vrms, with an auxiliary input scale factor of 30% and
an auxiliary 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.
When in FCR:
Theapplicationofa+/-3.000Vdcsignalcorresponds
to a -3.000 to3.000 Adc field current set point. The
auxiliary input scale factor is disabled in FCR mode.
Note: Any field current reference less than 0.000 Adc
will become 0.000 Adc.
Features and Protection
GPN046 04-13.indd 10 4/5/13 10:24 AM