Voltage Metering - GE Multilin 489 Instruction Manual

CHAPTER 6: ACTUAL VALUES
6.3.2

Voltage Metering

VOLTAGE
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
Courtesy of NationalSwitchgear.com
All measured current values are displayed here.
measurements:
A, B, C NEUT. AMPS
the differential operating current calculated as the vector difference between the output
side and the neutral end CT measurements on a per phase basis. The 489 negative-
sequence current is defined as the ratio of negative-sequence current to generator rated
FLA, I / FLA × 100%. The generator full load amps is calculated as: generator rated MVA /
2
( 3 × generator phase-to-phase voltage). Polar coordinates for measured currents are
also shown using Va (wye connection) or Vab (open delta connection) as a zero angle
reference vector. In the absence of a voltage signal (Va or Vab), the IA output current is
used as the zero angle reference vector.
PATH: ACTUAL VALUES A2 METERING DATA
Vab:
[ ] Vca:
AVERAGE LINE
MESSAGE
VOLTAGE: 0 Volts
Van:
MESSAGE
Vcn:
AVERAGE PHASE
MESSAGE
VOLTAGE: 0 Volts
LINE A-B VOLTAGE:
MESSAGE
LINE B-C VOLTAGE:
MESSAGE
LINE C-A VOLTAGE:
MESSAGE
PHASE A-N VOLTAGE:
MESSAGE
PHASE B-N VOLTAGE:
MESSAGE
PHASE C-N VOLTAGE:
MESSAGE
PER UNIT MEASUREMENT
MESSAGE
OF V/Hz: 0.00
FREQUENCY:
MESSAGE
0.00 Hz
NEUTRAL VOLTAGE
MESSAGE
FUND: 0.0 V
A, B, C AMPS
the neutral end CT measurements, and
VOLTAGE METERING
Range: 0 to 50000 V. Not seen if
0 Vbc: 0
0 Volts
Range: 0 to 50000 V. Not seen if
Range: 0 to 50000 V. Not seen if
0 Vbn: 0
0 Volts
Range: 0 to 50000 V. Not seen if
Range: 0 to 50000 V, 0 to 359°. Not
0 V 0° Lag
Range: as above
0 V 0° Lag
Range: as above
0 V 0° Lag
Range: 0 to 50000 V, 0 to 359°. Not
0 V 0° Lag
Range: as above
0 V 0° Lag
Range: as above
0 V 0° Lag
Range: 0.00 to 2.00. Not seen if
Range: 0.00 to 90.00 Hz. Not seen if
Range: 0.0 to 25000.0 V. Seen only if
represent the output side CT
A, B, C DIFF. AMPS
VT
is "None".
CONNECTION
VT
is "None".
CONNECTION
VT
is "Wye".
CONNECTION
VT
is "Wye".
CONNECTION
seen if is
VT CONNECTION
"None".
seen if is
VT CONNECTION
"Wye".
VT
is "None".
CONNECTION
VT
is "None".
CONNECTION
there is a neutral VT.
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