Marathon Electric DVR 2000E+ - Protection Functions

4
OVERVIEW
This manual provides details on how to install,
operate and maintain a DVR
®
2000E+ or
DVR
®
2000EC+ digital voltage regulator (DVR
®
)
with Marathon Electric synchronous generators.
Additional publications are available for Controller
Area Network (CAN) communications and MODBUS
communications.
The DVR
®
is a control device that regulates the
output voltage of a brushless, AC generator by
controlling the current into the generator exciter
field. Input power to the DVR
®
is derived from a
single phase permanent magnet generator (PMG).
The DVR
®
is supplied in an encapsulated package
designed for behind-the-panel mounting. It is held
in place by thread-forming screws that thread into
mounting holes in the face of the DVR
®
. The front
panel display annunciates regulator status and
system conditions.
MANUAL CONVENTIONS
This manual describes details for the DVR
®
2000E+
and DVR
®
2000EC+.
Features that are exclusive to the DVR
®
2000EC+ are
noted.
NEW/ENHANCED FUNCTIONS
New and enhanced functions are indicated in the
lists below. Legacy DVR’s may not support new and
enhanced functions.
REGULATION MODES
Three regulation modes:
• Singlephaseautomaticvoltageregulation(AVR1)
• Threephaseautomaticvoltageregulation(AVR3)
• Fieldcurrentregulation(FCR).
The DVR
®
2000EC+ adds two regulation modes:
• Reactivepowerregulation(VAR)
• Powerfactorregulation(PF)
FEATURES
The DVR
®
has the following features:
•Preset stability settings based on generator
frame size
• AdjustablesoftstartinAVR1orAVR3regulation
modes
• Underfrequency(Volts/Hertz)regulation
• TrueRMSThree-phaseorsingle-phase
generator voltage sensing
• TrueRMSThree-phaseorsingle-phase
 generatorcurrentsensing(optionalCT’srequired)
• TrueRMSthree-phasepowermetering(optional
CT’srequired)
• Fieldcurrentsensing
• Fieldvoltagemonitoring
• Contactinputsforsysteminterfacecapability
• Contactoutputforfaultindication
• Generator paralleling with reactive droop com-
pensation and reactive differential compensation
(Enhanced)
• Front-panel human-machine interface (HMI) for
status and configuration
• MODBUSprotocolviaRS232forexternal
communication (Enhanced)
•DVRPortal™ Windows
®
-based software for
configuration and monitoring (Enhanced)
• CANinterfacewithCAN2.0BJ1939protocolfor
metering and control (Enhanced)
• “Poweron”LEDindicator
• Configurable auxiliary input for metering and
control (Enhanced)
• Simulatedreactivepowerfordroopset-up(New)
• Generatorpowerlimitingmode(New)
PROTECTION
The DVR
®
has the following protection features:
• FieldOverExcitationShutdown
• FieldUnderExcitationShutdown(New)
• GeneratorOverVoltageShutdown(Enhanced)
• GeneratorUnderVoltageShutdown
• GeneratorVoltageImbalanceShutdown
(Enhanced)
• LossofGeneratorSensingShutdown
• InstantaneousFieldOverCurrentShutdown
• RegulatorOverTemperatureShutdown
• GeneratorReversePowerShutdown(Enhanced)
• Generator Start Up Fault Shutdown (EC+ only)
(New)
• FieldCurrentLimitingAlarm(Enhanced)
• GeneratorUnderFrequencyAlarm
• GeneratorPowerLimitAlarm(New)
• LossofCANCommunicationAlarm(Enhanced)
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General
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