Marathon Electric DVR 2000E+ - Protection Features Overview

17
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+ PROTECTION FEATURES
The DVR
®
2000E+ has the protective functions listed below:
 •FieldOverExcitationShutdown
 •GeneratorOverVoltageShutdown
 •GeneratorUnderVoltageShutdown
 •GeneratorVoltageImbalanceShutdown
 •LossofGeneratorSensingShutdown
 •FieldCurrentLimitingShutdown
 •InstantaneousFieldOverCurrentShutdown
 •RegulatorOverTemperatureShutdown
 •GeneratorUnderFrequencyAlarm
 •GeneratorReversePowerFlowAlarm
 •LossofCANCommunicationAlarm
Each fault or alarm condition is displayed through the HMI and the Windows® communication software.
Field Over Excitation Shutdown
The DVR
®
2000E+hasaFieldOverExcitationShutdownthresholdthatisadjustablefrom0.500to4.000A(default
of3.5A)withatimerthatisadjustablefrom1.0to15.0seconds(defaultof15.0sec).Thissettingismodied
through the Windows
®
communication software. If field current exceeds the shutdown threshold the timer is start-
ed. The HMI will change from a PYN status to an alarm status with alarm code A008. The Windows
®
communication
software also displays this alarm condition. If this current does not fall below 90% of the shutdown threshold within
the timer period, the regulator will stop providing excitation to the field and will close the fault output contact. The
HMI will change from an alarm status to a fault status with fault code f008. The Windows
®
communication soft-
ware also displays this fault condition. This is a latching condition that can be reset by removing power from the
regulator for at least 10 seconds or by momentarily shorting the EXCITATION_OFF circuit. When the DVR
®
2000E+
is powered up or the EXCITATION_OFF short is removed following a Field Over Excitation Shutdown, the fault
code f.0.0.8. will flash for 15 seconds on the HMI and the fault will be indicated in the Windows
®
communication
software on the History tab of the Faults and Alarms section of the monitor screen.
Generator Over Voltage Shutdown
The DVR
®
2000E+hasaGeneratorOverVoltageShutdownthresholdthatisadjustablefrom5%to20%(default
of 20%) over set point voltage with a fixed timer of 0.75 seconds. If generator voltage exceeds the over volt-
age threshold the regulator will stop providing excitation to the field and close the fault output contact. The HMI
will change from a PYN status to a fault status with fault code f013. The Windows
®
communication software also
displays this fault condition. This is a latching condition that can be reset by removing power from the
regulator for at least 10 seconds or by momentarily shorting the EXCITATION_OFF circuit. When the DVR
®
2000E+ is
powered up or the EXCITATION_OFF short is removed following a Generator Under Voltage Shutdown, the fault
code f.0.1.3. will flash for 15 seconds on the HMI and the fault will be indicated in the Windows
®
communication
software on the History tab of the Faults and Alarms section of the monitor screen.