Basler Electric DGC-2020HD - Manual (Page 98)

88 9469300990 Rev B
Locator Setting Range Increment Unit
F Pickup (V L-L) Per Unit based on nominal n/a per unit
G Dropout Volts 10 to 99,999 1 volts
H Dropout Per Unit based on nominal n/a per unit
Overfrequency and Underfrequency Settings
I Pickup Hz 46 to 64 0.01 Hz
J Pickup Hz Per Unit based on nominal n/a per unit
K Dropout Hz 46 to 64 0.01 Hz
L Dropout Hz Per Unit based on nominal n/a per unit
3 Phase and 1 Phase Settings
M Gen Stable Activation Delay 0.1 to 600 0.1 seconds
N Low Line Scale Factor 0.001 to 3 0.001 n/a
O
Alternate Frequency Scale
Factor
0.001 to 3 0.001 n/a
Breaker Operation
The DGC-2020HD attempts to close a breaker only after verifying that it can be closed. If the breaker
cannot be closed, the close request is ignored. Only one breaker can be closed at a time. Synchronization
is required before closing the breaker to a live bus. Closure to a dead bus can be performed after meeting
dead bus threshold and timing requirements set by the user.
Breaker Operation Requests
Types of breaker operation requests include:
•
Local Request - initiated by internal functions and based on operating modes.
•
Com Request - initiated through a communication port using BESTCOMSPlus or the front panel.
•
Logic Request - initiated from BESTlogicPlus.
The type of response given for a local request depends on the operating mode of the DGC-2020HD.
RUN Mode
When in RUN mode, the generator and mains breakers can be closed manually using contact inputs or
the breaker buttons on the BESTCOMSPlus Control screen.
OFF or AUTO Mode (Not Running)
If operating in the OFF mode or AUTO and not running, the generator breaker cannot be closed unless
the Dead Gen Close Enable and Dead Bus Close Enable settings are both enabled.
AUTO Mode (Running)
When in AUTO mode and running, the mains fail transfer feature will automatically control the mains
breaker and the generator breaker. Or, the external ATS (automatic transfer switch) will start the
generator and control the breakers itself. In addition, the generator breaker can be automatically
controlled by the demand start/stop function, the exercise timer function, or a RUNWLOAD (run with load)
start from BESTlogicPlus. The generator breaker can be manually controlled using contact inputs and
outputs, the breaker open and close commands through the front panel, or the breaker buttons on the
BESTCOMSPlus Control screen.
Generator Breaker Closure Conditions
The conditions under which the DGC-2020HD will close the generator breaker are described in the
following paragraphs. Two flow diagrams are provided to show the conditions under which the generator
Breaker Management DGC-2020HD