GE Multilin 489 User Manual

6–18 489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 6: ACTUAL VALUES
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
VT CONNECTION TYPE is programmed as “None” and NEUTRAL VOLTAGE TRANSFORMER is
“No” in S2 SYSTEM, the THIS FEATURE NOT PROGRAMMED flash message will appear
when an attempt is made to enter this group of messages.
6.3.3 Power Metering
PATH: ACTUAL VALUES ZV A2 METERING DATA ZV POWER METERING
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.
Note
An induction generator, by convention generates Watts and consumes vars (+W and
–vars). A synchronous generator can also generate vars (+vars).
If the
VT CONNECTION TYPE is programmed as “None”, the THIS FEATURE NOT
PROGRAMMED
flash message will appear when an attempt is made to enter this group of
messages.
MESSAGE
NEUTRAL VOLTAGE
3rd HARM: 0.0 V
Range: 0.0 to 25000.0 V. Seen only if
there is a neutral VT.
MESSAGE
TERMINAL VOLTAGE
3rd HARM: 0.0 V
Range: 0.0 to 25000.0 V. Seen only if VT
CONNECTION
is “Wye”.
MESSAGE
IMPEDANCE Vab / Iab
0.0 Ω sec. 0°
Range: 0.0 to 6553.5 Ωsec., 0 to 359°
 POWER [Z]
METERING
POWER FACTOR:
0.00
Range: 0.01 to 0.99 Lead or Lag, 0.00,
1.00
MESSAGE
REAL POWER:
0.000 MW
Range: 0.000 to ±2000.000 MW
MESSAGE
REACTIVE POWER:
0.000 Mvar
Range: 0.000 to ±2000.000 Mvar
MESSAGE
APPARENT POWER:
0.000 MVA
Range: 0.000 to 2000.000 MVA
MESSAGE
POSITIVE WATTHOURS:
0.000 MWh
Range: 0.000 to 4000000.000 MWh
MESSAGE
POSITIVE VARHOURS:
0.000 Mvarh
Range: 0.000 to 4000000.000 Mvarh
MESSAGE
NEGATIVE VARHOURS:
0.000 Mvarh
Range: 0.000 to 4000000.000 Mvarh
Courtesy of NationalSwitchgear.com

GE Multilin 489 Specifications

General

Brand	GE
Model	Multilin 489
Category	Relays
Language	English