Basler Electric DECS-250N - Manual (Page 35)

9440500990 Rev D 19
DECS-250N Synchronizer
K Angle Compensation (°): Adjustable from 0.0 to 359.9° in 0.1° increments.
L Sync Fail Activation Delay: Adjustable from 0.1 to 600 s in 0.1 s increments.
Voltage Matching
BESTCOMSPlus Navigation Path: Settings Explorer, Synchronizer/Voltage Matching, Voltage Matching
HMI Navigation Path: Settings, Sync/Voltage Matching, Voltage Matching
When enabled A , voltage matching is active in AVR control mode and automatically adjusts the AVR mode
setpoint to match the sensed bus voltage. Voltage matching is based on two parameters: band and
matching level.
The voltage matching band B defines the window in which the generator voltage must be for voltage
matching to occur.
The generator to bus PT matching level C defines the percentage of the sensed bus voltage to which the
generator sensed voltage will be adjusted.
Voltage matching settings are illustrated in Figure 11.
Figure 11. Voltage Matching Settings
A Voltage Matching: Select Enabled to enable function.
B Band: Adjustable from 0 to 20% in 0.1% increments.
C Gen to Bus PT Match Level: Adjustable from 0 to 700% in 0.1% increments.
Breaker Hardware Configuration
BESTCOMSPlus Navigation Path: Settings Explorer, Synchronizer/Voltage Matching, Breaker
Hardware
HMI Navigation Path: Settings, Sync/Voltage Matching, Breaker Hardware
The DECS-250N can control and monitor a generator breaker. Breaker hardware settings are illustrated
in Figure 12.
Breaker Failure
When a close command is issued to the breaker, the DECS-250N monitors the breaker status and
annunciates a breaker failure if the breaker does not close within the time defined by the breaker close
wait delay
A . Typically, the wait delay is set to be longer than the actual breaker closing time.
Generator Breaker
The DECS-250N must be configured B with the generator breaker characteristics before the breaker can
be controlled by the DECS-250N. Breakers controlled by pulse or continuous control inputs C are
supported. During anticipatory-mode synchronization, if the generator breaker is serving to tie the
generator to the bus, the uses the breaker closing time
D to calculate the optimum time to close the
breaker. For a pulse-controlled generator breaker, the breaker open E and close F pulse times are used by