Basler Electric DECS-250N - Manual (Page 36)

20 9440500990 Rev D
Synchronizer DECS-250N
the DECS-250N when issuing open and close commands to the breaker. When setting the pulse times,
the open and close times should be set at or longer than the breaker closing time setting.
If desired, breaker closure is possible during a dead bus condition G and/or dead generator condition H .
Caution
Use caution when connecting a “dead” generator to a “dead” bus.
Undesired system damage can occur if the bus becomes energized
while a “dead” generator is connected to it.
Figure 12. Breaker Hardware Configuration Settings
A Breaker Close Wait Time: Adjustable from 0.1 to 600 s in 0.1 s increments.
B Gen Breaker: Select Configured or NOT Configured.
C Contact Type: Select Pulse or Continuous.
D Breaker Closing Time: Adjustable from 0 to 800 ms in 5 ms increments.
E Open Pulse Time: Adjustable from 0.01 to 5 s in 0.01 s increments. Setting is available only when
Contact Type is Pulse.
F Close Pulse Time: Adjustable from 0.01 to 5 s in 0.01 s increments. Setting is available only when
Contact Type is Pulse.
G Dead Bus Close: Select Disabled or Enabled.
H Dead Gen Close Enable: Select Disabled or Enabled.
Generator and Bus Condition Detection
BESTCOMSPlus Navigation Path: Settings Explorer, Synchronizer/Voltage Matching, Bus Condition
Detection
HMI Navigation Path: Settings, Sync/Voltage Matching, Bus Condition Detection
The DECS-250N monitors the voltage and frequency of the generator and bus for determining when a
breaker closure is appropriate. Generator and bus condition detection settings are illustrated in Figure 13.