Marathon DVR 2000E - Overexcitation Shutdown Indicator Annunciating; Loss of Generator Sensing Indicator Annunciating; Overexcitation Limiting Indicator Annunciating

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S
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If the Stability Level is not properly set, reset the Stability Level.
OVEREXCITATION SHUTDOWN Indicator Is Annunciating
Step 1. Verify that the eld overvoltage setpoint is adjusted properly.
If not properly adjusted, readjust the eld overvoltage setpoint.
If properly adjusted, proceed to Step 2.
Step 2. Check for generator overloading.
If the generator is operating with a larger than rated load, shed load.
If the generator is operating with a rated or less than rated load, proceed to Step 3.
Step 3. Replace the DVR2000E.
If replacing the DVR2000E does not correct the malfunction, proceed to Step 4.
Step 4. Refer to the generator manual. Generator is defective.
LOSS OF GENERATOR SENSING Indicator Is Annunciating
Step 1. Verify that the voltage sensing leads are properly connected.
If the sensing leads are not properly connected, correct the connections.
If the sensing lead connections are correct, proceed to Step 2.
Step 2. For single-phase sensing, verify that E2 and E3 are connected.
If E2 and E3 are not connected, connect them both to phase C sensing voltage.
If E2 and E3 are properly connected, proceed to Step 3.
Step 3. Verify that the sensing potential transformer (if used) has the correct turns ratio and is functioning
properly.
If the sensing potential transformer has the wrong turns ratio or is malfunctioning, replace it.
If the sensing potential transformer is correct and functioning properly, proceed to Step 4.
Step 4. Verify that the generator output voltage is present on all phases.
If the generator is missing a phase, refer to the generator manual. Generator is defective.
If generator output voltage is balanced on all phases, proceed to Step 5.
Step 5 Replace the DVR2000E.
OVEREXCITATION LIMITING Indicator Is Annunciating
Step 1. Check for generator overloading.
If the generator is operating with a larger than rated load, shed load.
If the generator is operating with a rated or less than rated load, proceed to Step 2.
Step 2. Verify that the DVR2000E output (eld) current limit is not set too low.
If the output current limit setpoint is too low, adjust for the proper setting.
If the output current limit is set properly, proceed to Step 3.
Step 3. Verify that the generator exciter eld is not shorted.
If the generator exciter eld is shorted, replace the generator.
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Main Index
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Section 7 Index
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Section 7 Index