Loss Of Excitation (Ansi 40) - GE G30 Instruction Manual

5.6 GROUPED ELEMENTS
INVERSE CURVE C:
The curve for the Volts/Hertz Inverse Curve C shape is derived from the formula:
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.
5

PATH: SETTINGS GROUPED ELEMENTS
 LOSS OF
 EXCITATION
5-204
TDM
---------------------------------------------------- - when
T
=
V
  Pickup
--- - ⁄
 
F
Multiples of volts per hertz pickup
Figure 5–90: VOLTS-PER-HERTZ CURVES, INVERSE CURVE C

SETTING GROUP 1(6)
LOSS OF EXCITATION
FUNCTION: Disabled
LOSS OF EXCITATION
MESSAGE
SOURCE: SRC 1
LOSS OF EXCITATION
MESSAGE
CENTER 1: 10.00 ohm
LOSS OF EXCITATION
MESSAGE
RADIUS 1: 8.00 ohm
EXCITATION V SUPV 1:
MESSAGE
Enabled
LOSS OF EXCITATION
MESSAGE
PKP DELAY1: 0.050 s
LOSS OF EXCITATION
MESSAGE
CENTER 2: 12.00 ohm
G30 Generator Protection System
V
--- -
> Pickup
F
0.5
1
–

5.6.11 LOSS OF EXCITATION (ANSI 40)


LOSS OF EXCITATION
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: 0.10 to 300.00 ohms in steps of 0.01
Range: 0.10 to 300.00 ohms in steps of 0.01
Range: Disabled, Enabled
Range: 0.000 to 65.535 s in steps of 0.01
Range: 0.10 to 300.00 ohms in steps of 0.01
5 SETTINGS
(EQ 5.51)
Time
delay
setting
830740A1.CDR
GE Multilin