GE G30 - Loss of Excitation (Ansi 40)

5-204 G30 Generator Protection System GE Multilin
5.6 GROUPED ELEMENTS 5 SETTINGS
5
INVERSE CURVE C:
The curve for the Volts/Hertz Inverse Curve C shape is derived from the formula:
(EQ 5.51)
where: T = Operating Time
TDM = Time Delay Multiplier (delay in sec.)
V = fundamental RMS value of voltage (pu)
F = frequency of voltage signal (pu)
Pickup = volts-per-hertz pickup setpoint (pu)
The volts/hertz inverse C curves are shown below.
Figure 5–90: VOLTS-PER-HERTZ CURVES, INVERSE CURVE C
5.6.11 LOSS OF EXCITATION (ANSI 40)
PATH: SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  LOSS OF EXCITATION
 LOSS OF
 EXCITATION
LOSS OF EXCITATION
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
LOSS OF EXCITATION
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
MESSAGE
LOSS OF EXCITATION
CENTER 1: 10.00 ohm
Range: 0.10 to 300.00 ohms in steps of 0.01
MESSAGE
LOSS OF EXCITATION
RADIUS 1: 8.00 ohm
Range: 0.10 to 300.00 ohms in steps of 0.01
MESSAGE
EXCITATION V SUPV 1:
Enabled
Range: Disabled, Enabled
MESSAGE
LOSS OF EXCITATION
PKP DELAY1: 0.050 s
Range: 0.000 to 65.535 s in steps of 0.01
MESSAGE
LOSS OF EXCITATION
CENTER 2: 12.00 ohm
Range: 0.10 to 300.00 ohms in steps of 0.01
T
TDM
V
F
--- -


Pickup⁄
0.5
1–
-----------------------------------------------------
when
V
F
--- -
Pickup>=
Time to trip (in seconds)
Multiples of volts per hertz pickup
830740A1.CDR
Time
delay
setting