GE G60 Instruction Manual page 240

5.5 GROUPED ELEMENTS
h) VOLTS PER HERTZ (ANSI 24)
PATH: SETTINGS GROUPED ELEMENTS
VOLTS/HZ 1
5
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
SETUP SIGNAL SOURCES
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
SETUP AC INPUTS
SETUP POWER SYSTEM
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
divided by the
SYSTEM SETUP
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.
5-142
SETTING GROUP 1(6)
VOLTS/HZ 1 FUNCTION:
Disabled
VOLTS/HZ 1 SOURCE:
MESSAGE
SRC 1
VOLTS/HZ 1 PICKUP:
MESSAGE
1.00 pu
VOLTS/HZ 1 CURVE:
MESSAGE
Definite Time
VOLTS/HZ 1 TD
MESSAGE
MULTIPLIER:
VOLTS/HZ 1
MESSAGE
T-RESET: 1.0 s
VOLTS/HZ 1 BLOCK:
MESSAGE
Off
VOLTS/HZ 1 TARGET:
MESSAGE
Self-reset
VOLTS/HZ 1 EVENTS:
MESSAGE
Disabled
SOURCE 1(6) SOURCE 1(6) PHASE VT
VOLTAGE BANK N PHASE VT N SECONDARY
NOMINAL FREQUENCY
SYSTEM SETUP AC INPUTS
POWER SYSTEM
SETTING
VOLTS/HZ 1
FUNCTION:
Disabled = 0
Enabled = 1
SETTING
AND
VOLTS/HZ 1 BLOCK:
Off = 0
SETTING
VOLTS/HZ 1
SOURCE:
VOLT / Hz
Figure 5–84: VOLTS PER HERTZ SCHEME LOGIC
G60 Generator Management Relay
VOLTAGE ELEMENTS
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: 0.80 to 4.00 pu in steps of 0.01
Range: Definite Time, Inverse A, Inverse B, Inverse C,
FlexCurve A, FlexCurve B, FlexCurve C,
FlexCurve D
Range: 0.05 to 600.00 in steps of 0.01
1.00
Range: 0.0 to 1000.0 s in steps of 0.1
Range: FlexLogic™ operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
to None and
" "
setting, divided by the divided by the
setting.
VOLTAGE BANK N
setting.
NOMINAL FREQUENCY
SETTINGS
VOLTS / HZ 1
PICKUP:
VOLTS / HZ 1
CURVE:
VOLTS / HZ 1
TD MULTIPLIER:
VOLTS / HZ 1
FLEXLOGIC OPERANDS
T-RESET:
RUN VOLTS PER HERTZ 1 PKP
VOLTS PER HERTZ 1 DPO
t
VOLTS PER HERTZ 1 OP
V/Hz
5 SETTINGS
VOLTS/HZ 1(2)
to the correspond-
SOURCE 1(6) AUX VT
AUXILIARY VT N SECONDARY
828003A5.CDR
GE Multilin
SYSTEM
SYSTEM
SYSTEM
setting