GE Multilin
B30 Bus Differential System
5-199
5 SETTINGS
5.9 TRANSDUCER INPUTS AND OUTPUTS
5
Figure 5–88: DCMA OUTPUT CHARACTERISTIC
The DCmA output settings are described below.
•
DCMA OUTPUT H1 SOURCE
: This setting specifies an internal analog value to drive the analog output. Actual values
(FlexAnalog parameters) such as power, current amplitude, voltage amplitude, power factor, etc. can be configured as
sources driving DCmA outputs. Refer to Appendix A for a complete list of FlexAnalog parameters.
•
DCMA OUTPUT H1 RANGE
: This setting allows selection of the output range. Each DCmA channel may be set inde-
pendently to work with different ranges. The three most commonly used output ranges are available.
•
DCMA OUTPUT H1 MIN VAL
: This setting allows setting the minimum limit for the signal that drives the output. This
setting is used to control the mapping between an internal analog value and the output current. The setting is entered
in per-unit values. The base units are defined in the same manner as the FlexElement base units.
•
DCMA OUTPUT H1 MAX VAL
: This setting allows setting the maximum limit for the signal that drives the output. This
setting is used to control the mapping between an internal analog value and the output current. The setting is entered
in per-unit values. The base units are defined in the same manner as the FlexElement base units.
The
DCMA OUTPUT H1 MIN VAL
and
DCMA OUTPUT H1 MAX VAL
settings are ignored for power factor base units (i.e. if
the
DCMA OUTPUT H1 SOURCE
is set to FlexAnalog value based on power factor measurement).
Three application examples are described below.
EXAMPLE: CURRENT MONITORING
The phase A current (true RMS value) is to be monitored via the H2 current output working with the range from 4 to 20 mA.
The CT ratio is 5000:5 and the maximum load current is 4200 A. The current should be monitored from 0 A upwards, allow-
ing for 50% overload.
The phase current with the 50% overload margin is:
(EQ 5.21)
The base unit for current (refer to the
FlexElements
section in this chapter for additional details) is:
(EQ 5.22)
The minimum and maximum power values to be monitored (in pu) are:
(EQ 5.23)
The following settings should be entered:
DCMA OUTPUT H2 SOURCE
: “SRC 1 Ia RMS”
DCMA OUTPUT H2 RANGE
: “4 to 20 mA”
DCMA OUTPUT H2 MIN VAL
: “0.000 pu”
DCMA OUTPUT H2 MAX VAL
: “1.260 pu”
842739A1.CDR
DRIVING SIGNAL
OUTPUT CURRENT
MIN VAL
I
min
I
max
MAX VAL
NOTE
I
max
1.5 4.2 kA
×
6.3 kA
=
=
I
BASE
5 kA
=
minimum current
0 kA
5 kA
------------
0 pu, maximum current
6.3 kA
5 kA
-----------------
1.26 pu
=
=
=
=
Содержание B30 UR Series
Страница 10: ...x B30 Bus Differential System GE Multilin TABLE OF CONTENTS ...
Страница 92: ...3 44 B30 Bus Differential System GE Multilin 3 3 DIRECT INPUT AND OUTPUT COMMUNICATIONS 3 HARDWARE ...
Страница 122: ...4 30 B30 Bus Differential System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 326: ...5 204 B30 Bus Differential System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Страница 412: ...A 12 B30 Bus Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 554: ...D 10 B30 Bus Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...
Страница 566: ...E 12 B30 Bus Differential System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...
Страница 574: ...F 8 B30 Bus Differential System GE Multilin F 3 WARRANTY APPENDIX F F ...