Basler Electric DGC-2020 - Manual (Page 361)

Synchronizer Active for a Short Time, Then Stops
Step 1: Check if a Sync Fail pre-alarm or a Breaker Close Fail pre-alarm is occurring or has occurred.
The synchronizer stops acting when such a pre-alarm occurs. Press the Off button or the Reset
button on the DGC-2020 front panel to clear these pre-alarms.
Step 2: Verify that the Sync Fail Activation delay is sufficiently long to allow the synchronizer to
complete the synchronization process.
Step 3: Verify that the Breaker Close Wait time is not too short causing a pre-alarm to occur before the
breaker closes when a breaker close is initiated by the DGC-2020.
Synchronizer Does Not Lower Engine Speed Allowing Alignment of Bus and Generator
Step 1: Using the front panel HMI, navigate to the SETTINGS > MULTIGEN MANAGEMENT > GOV
ANALOG OUTPUT screen and set SPD RESPONSE to DECREASING.
Synchronizer Does Not Raise Engine Speed Allowing Alignment of Bus and Generator
Step 1: Using the front panel HMI, navigate to the SETTINGS > MULTIGEN MANAGEMENT > GOV
ANALOG OUTPUT screen and set SPD RESPONSE to DECREASING.
Synchronizer Does Not Lower the Generator Voltage to Achieve Matching of Bus and Generator
Voltages
Step 1: Navigate to the SETTINGS > MULTIGEN MANAGEMENT > AVR ANALOG OUTPUT screen
and set VOLT RESPONSE to DECREASING.
Synchronizer Does Not Raise Generator Voltage to Achieve Matching of Bus and Generator
Voltages
Step 1: Navigate to the SETTINGS > MULTIGEN MANAGEMENT > AVR ANALOG OUTPUT screen
and set VOLT RESPONSE to DECREASING.
Speed Bias
Engine Speed Does Not Change When Speed Bias Voltage Changes
Step 1: Verify that the engine speed will change when the speed bias changes. As a test, you can force
a voltage on the speed bias output by setting the Min Output Voltage and Max Output Voltage
to the same value by navigating to SETTINGS > MULTIGEN MANAGEMENT > GOV ANALOG
OUPUT. If the bias is current based, you can force a fixed current by setting the Governor
Output Current Minimum and Maximum to the same value by navigating to SETTINGS >
MULTIGEN MANAGEMENT > GOV ANALOG OUTPUT.
If the speed still does not change when varying the bias:
•
Verify that the governor or ECU is equipped and configured to accept bias inputs.
•
Check connections to verify the wiring to the governor bias is correct.
•
If you have an engine with an ECU, check ECU programming to verify it is set up to
accept a speed bias input.
Engine Speed Decreases When Speed Bias is Increased
Step 1: Navigate to the SETTINGS > MULTIGEN MANAGEMENT > GOV ANALOG OUTPUT screen
and set SPD RESPONSE to DECREASING.
Engine Speed Increases When Speed Bias is Decreased
Step 1: Navigate to the SETTINGS > MULTIGEN MANAGEMENT > GOV ANALOG OUTPUT screen
and set SPD RESPONSE to DECREASING.
Voltage Bias
Generator Voltage Does Not Change When Voltage Bias Changes
Step 1: As a test, you can force a voltage on the AVR bias output by setting the Min Output Voltage
and Max Output Voltage to the same value by navigating to SETTINGS > MULTIGEN
MANAGEMENT > AVR OUTPUT. If the bias is current based, you can force a fixed current by
setting the Min Output Current and Max Output Current to the same value by navigating to
SETTINGS > MULTIGEN MANAGEMENT > AVR OUTPUT.
9400200990 Rev X DGC-2020 Maintenance and Troubleshooting 8-7