Marathon Electric DVR 2000E+ - Generator under Voltage Shutdown; Generator Voltage Imbalance Shutdown; Loss of Generator Sensing Shutdown

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Marathon Electric (a division of RBC Manufacturing Corp.) reserves the right to change specications and this manual without notice.
Revised 06/2011
Generator Under Voltage Shutdown
The DVR
®
2000E+ has a Generator Under Voltage Shutdown threshold that is adjustable from 5% to 50%
(defaultof25%)withatimerthatisadjustablefrom1.0to15.0seconds(defaultof6.0sec).Ifgeneratorvoltage
drops below the under voltage threshold the timer is started. The HMI will change from a PYN status to an alarm
status with alarm code A012. The Windows
®
communication software also displays this alarm condition. If generator
voltage stays below the under voltage set point for the duration of the timer, the regulator will stop providing
excitation to the field and close the fault output contact. The HMI will change from a alarm status to a fault status
with fault code f012. The Windows
®
communication software also displays this fault condition. This is a latch-
ing 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.0.1.2. 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. This protection feature is inactive when operating in the FCR Regulation Mode.
Generator Voltage Imbalance Shutdown
The DVR
®
2000E+ has a Generator Voltage Imbalance threshold that is fixed at 20% and with a timer that is
adjustablefrom1.0to15.0seconds(defaultof12.0sec).Ifavoltageimbalanceisdetected,thetimerisstarted.
In AVR1 regulation mode, generator voltage imbalance protection is disabled. In AVR3 regulation mode, an
imbalance between phases of more than 20% is interpreted as a voltage imbalance. The HMI will change from
a PYN status to an alarm status with alarm code A016. The Windows
®
communication software also displays this
alarm condition. If the voltage imbalance condition continues for the duration of the timer, the regulator will stop
providing excitation to the field and close the fault output contact. The HMI will change from an alarm status
to a fault status with fault code f016. 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 Voltage Imbalance Shutdown, the fault code f.0.1.6. will flash 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.
Loss of Generator Sensing Shutdown
If sensing input continuity is lost, 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 f011. 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 Loss of
Sensing continuity Shutdown, the fault code f.0.1.1. will flash on the HMI and the fault will be indicated in the Win-
dows
®
communication software on the History tab of the Faults and Alarms section of the monitor screen.
Note: In AVR1 and AVR3 regulation modes, Loss of Sensing is not enabled until a speed of 850 RPM is detected.