9440300990 Rev J
169
DECS-250
Configuration
Configuration
Before the DECS-250 is placed in service, it must be configured for the controlled equipment and
application.
Generator, Field, and Bus Ratings
BESTCOMSPlus Navigation Path:
Settings Explorer, System Parameters, Rated Data
HMI Navigation Path:
Settings, System Parameters, Rated Data
Generator, field, and bus rating settings are illustrated in Figure 148.
For proper excitation control and protection, the DECS-250 must be configured with the ratings of the
controlled generator and field. These ratings are typically shown on the generator nameplate or can be
obtained from the generator manufacturer. Required generator ratings include the voltage
A
, frequency
B
,
power factor
C
, and apparent power
D
(kVA). Generator current
E
, real power
F
(kW), and reactive power
(kvar)
G
are listed with the other generator ratings as read-only settings. These values are automatically
calculated from the other generator ratings entered by the user. Required field ratings include the no load
dc voltage
H
and current
I
and full load voltage
J
and current
K
.
The ratio
L
of exciter poles to generator poles is used by the exciter diode monitor (EDM) function to detect
open and shorted exciter diodes. The calculated value can be entered directly or calculated using the
pole calculator
M
. A minimum ratio of 1.5 is recommended to ensure consistent EDM operation.
In applications where the generator will be synchronized/paralleled with a bus, the DECS-250 must be
configured with the rated bus voltage
N
.
The nominal operating power input voltage
O
is used to calculate the recommended Ka (Loop Gain) value.
This value is also used in metering calculations.
When using the DECS-250 with an exciter requiring an inverted output, check this box
P
to enable the
inverting of the DECS-250 control output.
Caution
Enabling inverted bridge output with an exciter which does not require
inverted bridge output will result in equipment damage.
Figure 148. Generator, Bus, Field, and Pole Ratio Ratings
Содержание DECS-250
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Страница 20: ...4 9440300990 Rev J Introduction DECS 250 ...
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Страница 40: ...24 9440300990 Rev J Synchronizer DECS 250 ...
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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 ...
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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 ...
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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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