Specifications

ection

If the sensing potential transformer is correct, proceed to Step 3.

Step 3. High generator output voltage may occur when operating in droop mode with a capacitive load.

If the high voltage condition is not caused by the droop function, proceed to Step 4.

Step 4. Replace the DVR

2000E unit.

Poor Voltage Regulation

Step 1. Verify that the ground terminal of the DVR

2000E is properly grounded.

If the DVR

2000E is not properly grounded, connect a dedicated ground wire to the quarter-inch fast-on

connector labeled GND on the rear of the DVR

2000E case.

If the DVR

2000E is properly grounded, proceed to Step 2.

Step 2. Check for grounded ﬁ eld leads.

If the ﬁ eld leads are grounded, isolate them from ground.

If the ﬁ eld leads are not grounded, proceed to Step 3.

Step 3. Check for grounded PMG leads.

If the PMG leads are grounded, isolate them from ground.

If the PMG leads are not grounded, proceed to Step 4.

Step 4. Verify that the generator frequency is not dropping below the DVR

2000E underfrequency setpoint

when load is applied to the generator.

If the generator frequency is dropping below the underfrequency setpoint, reduce the setpoint if

possible. Also check the prime mover and generator for proper sizing in relation to the applied load.

If poor regulation is not related to DVR

2000E underfrequency operation, proceed to Step 5.

Step 5. Verify that regulation is not being affected by normal droop operation.

If droop operation is not affecting regulation, proceed to Step 6.

Step 6. Replace the DVR

unit.

Generator Output Unstable (Hunting)

Step 1. Verify that the governor for the prime mover is operating properly.

If the governor is not operating properly, troubleshoot using the manufacturer’s suggested procedures.

If the governor is operating properly, proceed to Step 2.

Step 2. Verify that the sensing and input power leads are connected securely.

If the sensing or input power leads are not connected securely, tighten the connections.

If the sensing or input power lead connections are secure, proceed to Step 3.

Step 3. Verify that the DVR

2000E Stability Range is set to the proper range.

If the Stability Range setting is incorrect, reset the Stability Range.

If the Stability Range setting is correct, proceed to Step 4.

Step 4. Verify that the Stability Level is properly set.

If the Stability Level is not properly set, reset the Stability Level.