Sel 751A - Station DC Battery Monitor; Table 4.48 Output Setting for a Card in Slot 3; Figure 4.58 Analog Output Settings

4.104
SEL-751A Relay Instruction Manual Date Code 20100129
Protection and Logic Functions
Station DC Battery Monitor
Table 4.48 shows the setting prompt, setting range, and factory default settings
for an analog card in Slot 3.
In this example, assume we want to display the transformer temperature
measurement from Analog Input AI301 (relabeled TX_TEMP) on an
instrument in the station control room that operates on 4–20 mA. We install an
analog output card in Slot C, and set the card as shown in Figure 4.58.
=>>SET G AO301AQ TERSE <Enter>
Global
AO 301 Settings
AO301 ANALOG QTY (OFF, 1 analog quantity)
AO301AQ := OFF
? AI301 <Enter>
AO301 TYPE (I,V) AO301TYP:= I ? <Enter>
AO301 AQTY LO (-2147483647.000 to 2147483647.000)
AO301AQL:= 4.000 ? 4 <Enter>
AO301 AQTY HI (-2147483647.000 to 2147483647.000)
AO301AQH:= 20.000 ? 20 <Enter>
AO301 LO OUT VAL (-20.480 to 20.480 mA) AO301L := 4.000 ? <Enter>
AO301 HI OUT VAL (-20.480 to 20.480 mA) AO301H := 20.000 ? <Enter>
AO 302 Settings
AO302 ANALOG QTY (OFF, 1 analog quantity)
AO302AQ := OFF
? END <Enter>
Save changes (Y,N)? Y <Enter>
Settings Saved
=>>
Figure 4.58 Analog Output Settings
Station DC Battery Monitor
The station dc battery monitor in the SEL-751A can alarm for under- or
overvoltage dc battery conditions and give a view of how much the station dc
battery voltage dips when tripping, closing, and other dc control functions
take place. The monitor function is available with the enhanced voltage option
with monitoring package that includes the 5AVI card in slot E of the relay.
Refer to Station DC Battery Monitor on page 5.11 for a detailed description
and Table 5.8 for settings.
Table 4.48 Output Setting for a Card in Slot 3
Setting Prompt Setting Range
Setting Name :=
Factory Default
AO301 ANALOG QTY Off, 1 analog quantity AO301AQ := OFF
AO301 TYPE I, V AO301TYP := I
AO301 AQTY LO –2147483647.000 to
+2147483647.000
AO301AQL := 4.000
AO301 AQTY HI –2147483647.000 to
+2147483647.000
AO301AQH := 20.000
AO301 LO OUT VAL –20.480 to +20.480 mA AO301L := 4.000
AO301 HI OUT VAL –20.480 to +20.480 mA AO301H := 20.000
AO301 LO OUT VAL –10.240 to +10.240 V AO301L := 0.000
a
a
Voltage setting range for a voltage transducer, i.e., when AO301TYP := V
AO301 HI OUT VAL –10.240 to +10.240 V AO301H := 10.000
a
NOTE: The SEL-751A hides the
following settings with default values
when you use a 3 DI/4 DO/1 AO card:
AOxx1TYP := I
AOxx1L := 4.000
AOxx1H := 20.000