GE G60 UR Series, Instruction Manual

Page: 454 / 634

10-2 G60 Generator Protection System GE Multilin
10.1 SETTING EXAMPLE 10 APPLICATION OF SETTINGS
10
For the example system, the voltage settings are calculated as follows:
PHASE VT SECONDARY = (EQ 10.2)
PHASE VT RATIO = (EQ 10.3)
NEUTRAL VT RATIO = (EQ 10.4)
Enter the following values through EnerVista UR Setup (or alternately, through the front panel
SETTINGS
ÖØ
SYSTEM SETUP
Ö
AC INPUTS
ÖØ
VOLTAGE BANK F5
Ö
menu):
10.1.3 POWER SYSTEM
Frequency tracking should always be enabled for generator applications. Make the following power system parameters
changes via EnerVista UR Setup or through the
SETTINGS
ÖØ
SYSTEM SETUP
ÖØ
POWER SYSTEM
ÖØ
VOLTAGE BANK F5
Ö
menu:
10.1.4 SIGNAL SOURCES
Two sources are required for this application example. The “LINE” source uses the phase and auxiliary VT inputs and the
CT input wired to the generator output CT. The “NEUTRL” source uses the phase VT inputs and the CT input wired to the
generator neutral CT. Including the phase VT inputs for both sources allows the user to choose the location of elements that
use both voltage and current. Elements using the auxiliary VT input are assigned to the “NEUTRL” source.
Make the following changes through EnerVista UR Setup or through the
SETTINGS
ÖØ
SYSTEM SETUP
ÖØ
SOURCE 1
and
the
SETTINGS
ÖØ
SYSTEM SETUP
ÖØ
SOURCE 2
menus:
18000 V
3
----------------------
120 V
18900 V
----------------------
×
66 V =
18900 V
120 V
---------------------- 157.5 =
12000 V
240 V
----------------------
50
=