GE 845 Instruction Manual page 313

CHAPTER 4: SETPOINTS
REV Operating
Region
-ECA line
-Ig line
VCG
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 4-63: Ground Directional Voltage-polarized Characteristics
REV LA
line
LA
LA
REV LA
line
Path:
Setpoints > Protection > Group 1(6) > Current > Ground Directional OC 1(X)
FUNCTION
Range: Disabled, Enabled
Default: Disabled
POLARIZING VOLTAGE
Range: Calculated V0, Measured VX
Default: Calculated V0
Selects the polarizing voltage used by the directional unit when "Voltage" or "Dual"
polarizing mode is set. The polarizing voltage can be programmed to be either the zero-
sequence voltage calculated from the phase voltages ("Calculated V_0") or supplied
externally as an auxiliary voltage ("Measured VX")
-3V_0 line
FWD LA
line
VAG
(reference)
LA
ECA
FWD LA
line
3V_0 line
PROTECTION
FWD Operating
Region
Ig line
ECA line
LA
VBG
827805X1.CDR
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