GE 745 Instruction Manual page 139

CHAPTER 5: SETPOINTS
5.4.11 Analog Outputs 1 to 7

ANALOG OUTPUT 1 [
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
PATH: SETPOINTS S2 SYSTEM SETUP


] ANALOG OUTPUT 1
FUNCTION: Disabled
ANALOG OUTPUT 1
MESSAGE
VALUE: W1 ΦA Current
ANALOG OUTPUT 1
MESSAGE
RANGE: 4-20 mA
ANALOG OUTPUT 1
MESSAGE
MIN:
ANALOG OUTPUT 1
MESSAGE
MAX: 1000 A
There are seven analog outputs on the 745 relay which are selected to provide a full-scale
output range of one of 0 to 1 mA, 0 to 5 mA, 4 to 20 mA, 0 to 20 mA or 0 to 10 mA. Each
channel can be programmed to monitor any measured parameter. This sub-section is only
displayed with the option installed.
• ANALOG OUTPUT 1(7) FUNCTION: This message enables or disables the analog
output 1(7) feature. When disabled, 0 mA will appear at the corresponding terminal.
• ANALOG OUTPUT 1(7) VALUE: Select the measured parameter below to be
represented by the mA DC current level of analog output 1(7).
Parameter
W1(3) ΦA Current
W1(3) ΦB Current
W1(3) ΦC Current
W1(3) Loading
W1(3) ΦA THD
W1(3) ΦB THD
W1(3) ΦC THD
W1(3) Derating
Frequency
Tap Position
Voltage
W1(3) ΦA Demand
W1(3) ΦB Demand
W1(3) ΦC Demand
Analog Input
MaxEvnt W1(3) Ia
MaxEvnt W1(3) Ib
MaxEvnt W1(3) Ic
MaxEvnt W1(3) Ia
• ANALOG OUPUT 1(7) RANGE: Select the full-scale range of output current for analog
output 1(7).
• ANALOG OUTPUT 1(7) MIN/MAX: Enter the value of the selected parameter which
corresponds to the minimum/maximum output current of analog output 1(7).
ANALOG OUTPUTS

0 A
Description
Select to monitor the RMS value (at fundamental frequency) of the
winding 1(3) Phase A, B, and C current inputs.
Select to monitor the winding 1(3) load as a percentage of the rated
load for that winding.
Select to monitor the total harmonic distortion in the winding 1(3)
phase A, B, and C current inputs.
Select to monitor the harmonic derating factor (that is, the derated
transformer capability while supplying non-sinusoidal load currents)
in winding 1(3).
Select to monitor the system frequency.
Select to monitor the onload tap changer position.
Select to monitor the system voltage as measured from the voltage
input.
Select to monitor the current demand value of the winding 1(3)
phase A, B, and C current inputs.
Select to monitor the general purpose analog input current.
Select to monitor the maximum captured RMS value (at fundamental
frequency) of the winding 1(3) phase A, B, C, and ground current
input for all events since the last time the event recorder was
cleared.
S2 SYSTEM SETUP
ANALOG OUTPUT 1(7)

Range: Enabled, Disabled
Range: see table below
Range: 0-1 mA, 0-5 mA, 4-20 mA, 0-20
mA, 0-10 mA
Range: matches the range of the
selected measured parameter
Range: matches the range of the
associated actual value
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