Marathon DVR 2000E - Low Generator Output Voltage; High Generator Output Voltage

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If the soft start settings are incorrect, adjust the settings.
If the soft start settings have no effect, proceed to Step 8.
Step 8. Replace the DVR2000E unit.
If replacing the DVR2000E unit does not correct the malfunction, then the generator is defective.
Consult with the generator manufacturer.
Low Generator Output Voltage
Step 1. Verify that the voltage adjustment is not set too low.
If the voltage adjustment is too low, adjust it to the correct setpoint.
If the voltage adjustment is correct, proceed to Step 2.
Step 2. Verify that the underfrequency knee setpoint is not greater than the generator frequency.
If the underfrequency setpoint is too high, adjust the setpoint below the rated generator frequency.
If the underfrequency setpoint is correct, proceed to Step 3.
Step 3. Verify that the generator is spinning at rated speed.
If the generator is not up to rated speed, increase the generator speed to the rated level.
If the generator is spinning at rated speed, proceed to Step 4.
Step 4. Check for correct input power to the DVR2000E. Refer to Section 1 (General Information, Specications)
for input power requirements.
If the DVR2000E input voltage is low, refer to the PMG manual for PMG.
If the voltage is at the required level, proceed to Step 5.
Step 5. Verify that the sensing potential transformer (if used) has the correct turns ratio and is operating
correctly.
If the turns ratio of the sensing potential transformer is incorrect, replace the sensing potential
transformer.
If the sensing potential transformer is operating correctly, proceed to Step 6.
Step 6. Verify that the front panel OVEREXCITATION LIMITING indicator is not lit.
If the front panel OVEREXCITATION LIMITING indicator is lit, check the generator and/or load
conditions. Also check the eld-current limit setpoint for the correct level. Interrupt input power or shut
down the generator for a minimum of one minute.
If the front panel OVEREXCITATION LIMITING indicator is not lit, proceed to Step 7.
Step 7. Low generator output voltage may occur when operating in droop mode with an inductive load.
If the low voltage condition is not caused by the droop function, proceed to Step 8.
Step 8. Replace the DVR2000E unit.
High Generator Output Voltage
Step 1. Verify that the voltage adjustment is not set too high.
If the voltage adjustment is too high, adjust it to the correct setpoint.
If the voltage adjustment is correct, proceed to Step 2.
Step 2. Verify that the sensing potential transformer (if used) has the correct turns ratio.
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Main Index
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Section 7 Index
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Main Index
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Section 7 Index