Volts Per Hertz (Ansi 24, Iec Pvph) - GE T60 Instruction Manual

5 SETTINGS
g) VOLTS PER HERTZ (ANSI 24, IEC PVPH)

PATH: SETTINGS GROUPED ELEMENTS
 VOLTS/HZ 1

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The per-unit volts-per-hertz (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 volt-
age, set 
SYSTEM SETUP SIGNAL SOURCES
to the corresponding 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. If the voltage bank connection value is selected as "Delta", then the phase-to-phase nominal voltage is used to define
the per-unit value. If the voltage bank connection value is selected as "Wye", then the
ting further defines the operating quantity and per-unit value for this element. If the voltage mode is set as "Phase-
phase", then the operating quantity for this element will be phase-to-phase nominal voltage. Likewise, if the voltage
mode is set to "Phase-ground", then the operating quantity for this element will be the phase-to-ground nominal volt-
age. It is beneficial to use the phase-to-phase voltage mode for this element when the T60 device is applied on an iso-
lated or resistance-grounded system.
3. 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
4. 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.
GE Multilin

SETTING GROUP 1(6)
VOLTS/HZ 1 FUNCTION:
Disabled
VOLTS/HZ 1 SOURCE:
SRC 1
VOLTS/HZ 1 VOLTAGE:
MODE: Phase-ground
VOLTS/HZ 1 PICKUP:
1.00 pu
VOLTS/HZ 1 CURVE:
Definite Time
VOLTS/HZ 1 TD
MULTIPLIER:
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)

VOLTAGE BANK N PHASE VT N SECONDARY
 setting.
NOMINAL FREQUENCY

SYSTEM SETUP AC INPUTS
 
POWER SYSTEM NOMINAL FREQUENCY
T60 Transformer Protection System

VOLTAGE ELEMENTS
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: Phase-ground, Phase-phase
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

SOURCE 1(6) PHASE VT
setting, divided by the divided by the
 
VOLTAGE BANK N AUXILIARY VT N SECONDARY
setting.
5.6 GROUPED ELEMENTS

VOLTS/HZ 1(2)
to None and
" "
SOURCE 1(6) AUX VT
SYSTEM
SYSTEM
VOLTS/HZ 1 VOLTAGE MODE
setting
5-265
5
set-