Power Metering - GE Multilin 489 Instruction Manual

6.3.3

Power Metering

POWER
METERING
Note
6–18
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NEUTRAL VOLTAGE
MESSAGE
3rd HARM: 0.0 V
TERMINAL VOLTAGE
MESSAGE
3rd HARM: 0.0 V
IMPEDANCE Vab / Iab
MESSAGE
0.0 Ω sec.
Measured voltage parameters will be displayed here. The V/Hz measurement is a per unit
value based on Vab voltage/measured frequency divided by generator phase-to-phase
nominal voltage/nominal system frequency. Polar coordinates for measured phase and/or
line voltages 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), IA output current
is used as the zero angle reference vector.
If is programmed as "None" and
VT CONNECTION TYPE
"No" in S2 SYSTEM, the
THIS FEATURE NOT PROGRAMMED
when an attempt is made to enter this group of messages.
PATH: ACTUAL VALUES A2 METERING DATA
[ ] POWER FACTOR:
0.00
REAL POWER:
MESSAGE
REACTIVE POWER:
MESSAGE
APPARENT POWER:
MESSAGE
POSITIVE WATTHOURS:
MESSAGE
POSITIVE VARHOURS:
MESSAGE
NEGATIVE VARHOURS:
MESSAGE
The values for power metering appear here. Three-phase total power quantities are
displayed here. Watthours and varhours are also shown here. Watthours and varhours will
not update if a digital input programmed as Test Input is shorted.
An induction generator, by convention generates Watts and consumes vars (+W and
–vars). A synchronous generator can also generate vars (+vars).
If the is programmed as "None", the
VT CONNECTION TYPE
flash message will appear when an attempt is made to enter this group of
PROGRAMMED
messages.
CHAPTER 6: ACTUAL VALUES
Range: 0.0 to 25000.0 V. Seen only if
there is a neutral VT.
Range: 0.0 to 25000.0 V. Seen only if
CONNECTION
Range: 0.0 to 6553.5 Ωsec., 0 to 359°
0°
NEUTRAL VOLTAGE TRANSFORMER
flash message will appear
POWER METERING
Range: 0.01 to 0.99 Lead or Lag, 0.00,
1.00
Range: 0.000 to ±2000.000 MW
0.000 MW
Range: 0.000 to ±2000.000 Mvar
0.000 Mvar
Range: 0.000 to 2000.000 MVA
0.000 MVA
Range: 0.000 to 4000000.000 MWh
0.000 MWh
Range: 0.000 to 4000000.000 Mvarh
0.000 Mvarh
Range: 0.000 to 4000000.000 Mvarh
0.000 Mvarh
THIS FEATURE NOT
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
VT
is "Wye".
is