Winco DGC-2020 - Manual (Page 216)

7-4 DGC-2020 Maintenance and Troubleshooting 9400200990 Rev K
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.
Generator Breaker Does Not Open When It Should
Step 1: Verify the wiring to the breaker from the DGC-2020. If it seems OK, 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 Open When Mains Fails
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 ENABLE on the SETTINGS-
>BREAKER MANAGEMENT->BREAKER HARDWARE screen.
Step 4: Verify that a failure of the mains is detected by the DGC-2020. Check status using the Metering
Explorer in BESTCOMSPlus and verify that the MAINS FAIL status LED is lit when the power
on the DGC-2020 bus voltage input is either out of voltage or frequency range. If necessary,
modify the settings on the SETTINGS->BREAKER MANAGEMENT->BUS CONDITION
DETECTION screen to achieve correct detection.
Step 5: Verify the wiring to the breaker from the DGC-2020. If it seems OK, 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 ENABLE on the SETTINGS-
>BREAKER MANAGEMENT->BREAKER HARDWARE screen.
Step 4: Verify that stable mains power is detected by the DGC-2020. Check status using the Metering
Explorer in BESTCOMSPlus and verify that the MAINS STABLE status LED is lit when the
power on the DGC-2020 bus voltage input is good. If necessary, modify the settings on the
SETTINGS->BREAKER MANAGEMENT->BUS CONDITION DETECTION screen to achieve
correct detection.
Step 5: Verify the wiring to the breaker from the DGC-2020. If it seems OK, 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.