GE t60 Instruction Manual page 189

5 SETTINGS
g) VOLTS PER HERTZ (ANSI 24)
PATH: SETTINGS GROUPED ELEMENTS
VOLTS/HZ 1
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
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MESSAGE
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 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.
SETTING
VOLTS/HZ 1
FUNCTION:
Disabled = 0
Enabled = 1
SETTING
VOLTS/HZ 1 BLOCK:
Off = 0
SETTING
VOLTS/HZ 1
SOURCE:
VOLT / Hz
GE Multilin
SETTING GROUP 1(6)
VOLTS/HZ 1 FUNCTION:
Disabled
VOLTS/HZ 1 SOURCE:
SRC 1
VOLTS/HZ 1 PICKUP:
1.00 pu
VOLTS/HZ 1 CURVE:
Definite Time
VOLTS/HZ 1 TD
MULTIPLIER: 1.00
VOLTS/HZ 1
T-RESET: 1.0 s
VOLTS/HZ 1 BLOCK:
Off
VOLTS/HZ 1 TARGET:
Self-reset
VOLTS/HZ 1 EVENTS:
Disabled
SOURCE 1(6) SOURCE 1(6) PHASE VT
VOLTAGE BANK N PHASE
SYSTEM SETUP POWER SYSTEM
POWER SYSTEM NOMINAL FREQUENCY
SETTINGS
VOLTS / HZ 1
PICKUP:
VOLTS / HZ 1
CURVE:
VOLTS / HZ 1
TD MULTIPLIER:
VOLTS / HZ 1
T-RESET:
AND RUN
t
Figure 5–64: VOLTS PER HERTZ SCHEME LOGIC
T60 Transformer Management Relay
5.5 GROUPED ELEMENTS
VOLTAGE ELEMENTS VOLTS/HZ 1(2)
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
Range: 0.05 to 600.00 in steps of 0.01
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
" " SOURCE 1(6) AUX VT
setting, divided by the
NOMINAL FREQUENCY
VOLTAGE BANK AUXILIARY VT SECONDARY
setting.
FLEXLOGIC OPERANDS
VOLTS PER HERTZ 1 PKP
VOLTS PER HERTZ 1 DPO
VOLTS PER HERTZ 1 OP
V/Hz
828003A5.CDR
5
SYSTEM
to the correspond-
SYSTEM
setting.
setting
5-111