GE G60 UR Series, Instruction Manual

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5-186 G60 Generator Protection System GE Multilin
5.6 GROUPED ELEMENTS 5 SETTINGS
5
h) VOLTS PER HERTZ (ANSI 24)
PATH: SETTINGS
ÖØ
GROUPED ELEMENTS
Ö
SETTING GROUP 1(6)
ÖØ
VOLTAGE ELEMENTS
ÖØ
VOLTS/HZ 1(2)
The per-unit V/Hz value is calculated using the maximum of the three-phase voltage inputs or the auxiliary voltage channel
Vx input, if the Source is not configured with phase voltages. To use the V/Hz element with auxiliary voltage, set
SYSTEM
SETUP
ÖØ
SIGNAL SOURCES
Ö
SOURCE 1(6)
ÖØ
SOURCE 1(6) PHASE VT
to
“
None
”
and
SOURCE 1(6) AUX VT
to the correspond-
ing voltage input bank. If there is no voltage on the relay terminals in either case, the per-unit V/Hz value is automatically
set to “0”. The per unit value is established as per voltage and nominal frequency power system settings as follows:
1. If the phase voltage inputs defined in the source menu are used for V/Hz operation, then “1 pu” is the selected
SYSTEM
SETUP
Ö
AC INPUTS
ÖØ
VOLTAGE BANK N
ÖØ
PHASE VT N SECONDARY
setting, divided by the divided by the
SYSTEM
SETUP
ÖØ
POWER SYSTEM
Ö
NOMINAL FREQUENCY
setting.
2. When the auxiliary voltage Vx is used (regarding the condition for “None” phase voltage setting mentioned above),
then the 1 pu value is the
SYSTEM SETUP
Ö
AC INPUTS
ÖØ
VOLTAGE BANK N
ÖØ
AUXILIARY VT N SECONDARY
setting
divided by the
SYSTEM SETUP
ÖØ
POWER SYSTEM
Ö
NOMINAL FREQUENCY
setting.
3. If V/Hz source is configured with both phase and auxiliary voltages, the maximum phase among the three voltage
channels at any given point in time is the input voltage signal for element operation, and therefore the per-unit value
will be calculated as described in Step 1 above. If the measured voltage of all three phase voltages is 0, than the per-
unit value becomes automatically 0 regardless of the presence of auxiliary voltage.
Figure 5–104: VOLTS PER HERTZ SCHEME LOGIC
„
VOLTS/HZ 1
„
VOLTS/HZ 1 FUNCTION:
Disabled
Range: Disabled, Enabled
MESSAGE
VOLTS/HZ 1 SOURCE:
SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
MESSAGE
VOLTS/HZ 1 PICKUP:
1.00 pu
Range: 0.80 to 4.00 pu in steps of 0.01
MESSAGE
VOLTS/HZ 1 CURVE:
Definite Time
Range: Definite Time, Inverse A, Inverse B, Inverse C,
FlexCurve A, FlexCurve B, FlexCurve C,
FlexCurve D
MESSAGE
VOLTS/HZ 1 TD
MULTIPLIER: 1.00
Range: 0.05 to 600.00 in steps of 0.01
MESSAGE
VOLTS/HZ 1
T-RESET: 1.0 s
Range: 0.0 to 1000.0 s in steps of 0.1
MESSAGE
VOLTS/HZ 1 BLOCK:
Off
Range: FlexLogic™ operand
MESSAGE
VOLTS/HZ 1 TARGET:
Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
VOLTS/HZ 1 EVENTS:
Disabled
Range: Disabled, Enabled
SETTING
SETTINGS
FLEXLOGIC OPERANDS
SETTING
SETTING
VOLTS/HZ 1
FUNCTION:
VOLTS / HZ 1
TD MULTIPLIER:
VOLTS / HZ 1
T-RESET:
VOLTS / HZ 1
CURVE:
VOLTS / HZ 1
PICKUP:
VOLTS PER HERTZ 1 PKP
VOLTS PER HERTZ 1 DPO
VOLTS PER HERTZ 1 OP
VOLTS/HZ 1 BLOCK:
Disabled = 0
Off = 0
Enabled = 1
VOLTS/HZ 1
SOURCE:
VOLT / Hz
RUN AND
t
V/Hz
828003A5.CDR