9440300990 Rev J
23
DECS-250
Synchronizer
O
Bus Stability Underfrequency Pickup and Dropout
: Adjustable from 46 to 64 Hz in 0.05 Hz increments.
P
Bus Stable Activation Delay
: Adjustable from 0.1 to 600 s in 0.1 s increments.
Generator Governor Control
BESTCOMSPlus Navigation Path:
Settings Explorer, Synchronizer/Voltage Matching, Governor Bias
Control Settings
HMI Navigation Path:
Settings, Sync/Voltage Matching, Governor Bias Control Settings
During synchronization, the DECS-250 adjusts the generator voltage and frequency by issuing speed
correction signals to the speed governor. Correction signals are issued in the form of DECS-250 output
contact closures. These correction signals may be either continuous or proportional
A
. When proportional
correction is selected, the correction pulses are of varying widths
B
and intervals
C
. Initially, long pulses are
issued when the frequency difference between the generator and bus is large. As the correction pulses
take effect and the frequency difference becomes smaller, the correction pulse widths are proportionally
decreased.
Governor bias control settings are illustrated in Figure 14.
Figure 14. Generator Governor Control Settings
A
Bias Control Contact Type:
Select Continuous Pulse or Proportional Pulse.
B
Correction Pulse Width
: Adjustable from 0 to 99.9 s in 0.1 s increments.
C
Correction Pulse Interval
: Adjustable from 0 to 99.9 s in 0.1 s increments.
Содержание DECS-250
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Страница 6: ...iv 9440300990 Rev J Revision History DECS 250 ...
Страница 16: ...xiv 9440300990 Rev J Contents DECS 250 ...
Страница 20: ...4 9440300990 Rev J Introduction DECS 250 ...
Страница 28: ...12 9440300990 Rev J Power Stage DECS 250 ...
Страница 32: ...16 9440300990 Rev J Voltage and Current Sensing DECS 250 ...
Страница 40: ...24 9440300990 Rev J Synchronizer DECS 250 ...
Страница 52: ...36 9440300990 Rev J Auxiliary Control DECS 250 ...
Страница 56: ...40 9440300990 Rev J Contact Inputs and Outputs DECS 250 ...
Страница 84: ...68 9440300990 Rev J Limiters DECS 250 ...
Страница 108: ...92 9440300990 Rev J Power System Stabilizer DECS 250 Figure 85 PSS Function Blocks and Software Switches ...
Страница 114: ...98 9440300990 Rev J Power System Stabilizer DECS 250 Figure 96 PSS Parameter Settings ...
Страница 124: ...108 9440300990 Rev J Stability Tuning DECS 250 ...
Страница 126: ...110 9440300990 Rev J Mounting DECS 250 Figure 103 Overall and Projection Mounting Dimensions ...
Страница 127: ...9440300990 Rev J 111 DECS 250 Mounting Figure 104 DECS 250 Escutcheon Plate Dimensions ...
Страница 128: ...112 9440300990 Rev J Mounting DECS 250 Figure 105 Panel Cutting and Drilling Dimensions for DECS 250 Panel Mounting ...
Страница 198: ...182 9440300990 Rev J Timekeeping DECS 250 ...
Страница 210: ...194 9440300990 Rev J CAN Communication DECS 250 ...
Страница 304: ...288 9440300990 Rev J Maintenance DECS 250 ...
Страница 316: ...300 9440300990 Rev J Specifications DECS 250 ...
Страница 334: ...318 9440300990 Rev J Analog Expansion Module DECS 250 ...
Страница 341: ...9440300990 Rev J 325 DECS 250 Contact Expansion Module Figure 188 CEM 2020 Input Contact and Output Contact Terminals ...
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