Basler Electric DGC-2020HD - Manual (Page 303)

9469300990 Rev B 293
DGC-2020HD Maintenance and Troubleshooting
necessary, modify the settings on the Settings, Breaker Management, Bus Condition screen to
achieve correct detection.
Step 5: Verify the wiring to the breaker from the DGC-2020HD. If it appears correct, you can do a
manual close and open by modifying the programmable logic. Map some unused outputs to the
Open and Close outputs from the Gen Breaker Block in the programmable logic. Map a virtual
switch to the logic output that would normally be the breaker close output. Map another virtual
switch to the logic output that would normally be the breaker close output. Connect with
BESTCOMSPlus, and exercise the virtual switches using the Control panel located in the
Metering Explorer. Never turn open and close on at the same time. This could damage the
breaker and/or motor operator. If everything is working as expected, restore the logic to its
original diagram.
Mains Breaker Does Not Close After Mains Returns
Step 1: Verify that a Mains Breaker has been configured by examining the settings on the Settings,
Breaker Management, Breaker Hardware screen.
Step 2: Verify the mains breaker has been correctly included in the programmable logic.
Step 3: Verify that the Mains Fail Transfer parameter is set to Enabled on the Settings, Breaker
Management, Breaker Hardware screen.
Step 4: Verify that stable mains power is detected by the DGC-2020HD. Check status using the
Metering Explorer in BESTCOMSPlus and verify that the Mains Stable status LED is lit when
the power on the DGC-2020HD bus voltage input is good. If necessary, modify the settings on
the Settings, Breaker Management, Bus Condition screen to achieve correct detection.
Step 5: Verify the wiring to the breaker from the DGC-2020HD. If it appears correct, you can do a
manual close and open by modifying the programmable logic. Map some unused outputs to the
Open and Close outputs from the Gen Breaker Block in the programmable logic. Map a virtual
switch to the logic output that would normally be the breaker open output. Map another virtual
switch to the logic output that would normally be the breaker close output. Connect with
BESTCOMSPlus, and exercise the virtual switches using the Control panel located in the
Metering Explorer. Never turn open and close on at the same time. This could damage the
breaker and/or motor operator. If everything is working as expected, restore the logic to its
original diagram.
Synchronizer
Determining if the Synchronizer is Active
Step 1: Disable the speed trim function.
Step 2: Initiate a breaker close request by one of the methods listed in the Breaker Management
chapter.
Step 3: Check for raise and/or lower pulses coming from the DGC-2020HD if the governor or AVR bias
control output type is contact.
Step 4: Check the governor and/or AVR bias analog outputs on the DGC-2020HD with a volt meter if
the governor or AVR bias control output type is analog.
Step 5: The voltages or raise/lower pulses should be changing when the synchronizer is active. If there
are no raise/lower pulses, or if the analog bias voltages do not change, the synchronizer is not
active.
Synchronizer Not Active
Step 1: Check style number to verify that the DGC-2020HD has the synchronizer option. If the
synchronizer option does not exist in the style number, you may contact Basler Electric and
request a style number change.
Step 2: Check status using the Metering Explorer in BESTCOMSPlus ® and verify that when the
generator is running, the Generator Stable status LED is lit and the Bus Stable LED is lit. Adjust