Basler Electric DGC-2020 - Manual (Page 349)

Figure 7-64. Settings Explorer, Breaker Management, Breaker Hardware Screen
a. Configure Mains Fail Transfer parameters in BESTCOMSPlus under SETTINGS EXPLORER
> BREAKER MANAGEMENT > MAINS FAIL. See Figure 7-65.
Front Panel Navigation Path: SETTINGS > BREAKER MANAGEMENT > BREAKER
HARDWARE > MAINS FAIL TRANSFER
i. Enable Mains Fail Transfer
ii. Enter the transfer and return delays
iii. Enter the max transfer time. This is the maximum duration allowed for the transfer to
be accomplished. If this time is exceeded, a mains fail transfer pre-alarm is
annunciated.
iv. Configure the Mains Fail Transfer Type setting for open or closed transitions. In open
transitions, the generator is not connected directly to the utility at any time. In closed
transitions, when transitioning the load from the generator to the utility, the generator
will synchronize to the utility, close the mains breaker, then open the generator
breaker when the generator has unloaded, or when the max parallel time has
expired, whichever occurs first.
v. Set the Max parallel Time if closed transitions are configured. This is the maximum
amount of time that the generator is paralleled to the utility when the load is
transitioned from the generator back to the utility power.
vi. Set the In Phase Monitor setting to Enable or Disable if open transitions are selected.
When enabled, the DGC-2020 initiates an open transition of the load from generator
power back to utility power when an alignment phase angle between the generator
and the utility passes through zero degrees. This can be less disruptive to certain
types of load than transitioning at arbitrary phase angles.
b. Breaker Close Wait Time. (See Figure 7-64) This is a time interval in which it is expected that
the breaker will transition from open to closed or closed to open. If it does not change state in
that time, either a Gen Breaker Close Fail or Gen Breaker Open Fail is annunciated for
Generator breaker failures, and/or Mains Breaker Close Fail or Mains Breaker Open Fail is
annunciated for mains breaker failures.
c. Generator Breaker (See Figure 7-64)
i. Set Dead Bus Close Enable to Enabled.
ii. Select the contact type and enter pulse times if pulsed contacts are used.
9400200990 Rev X DGC-2020 Setup 7-61