GE G60 Instruction Manual page 445

CHAPTER 5: SETTINGS
5.7.13.8 Volts per hertz (ANSI 24, IEC PVPH)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  VOLTAGE ELEMENTS  VOLTS/HZ 1(2)
 VOLTS/HZ 1

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
voltage, set
SYSTEM SETUP  SIGNAL SOURCES  SOURCE 1(6)  SOURCE 1(6) PHASE VT
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  VOLTAGE BANK N  PHASE VT N SECONDARY
 POWER SYSTEM  NOMINAL FREQUENCY
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
setting 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 is the phase-to-phase nominal voltage. Likewise, if the voltage
G60 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 5-151: Auxiliary overvoltage logic
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: 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
setting.
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
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
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
VOLTS/HZ 1 VOLTAGE MODE
GROUPED ELEMENTS
to
SOURCE 1(6) AUX VT
SYSTEM
SYSTEM SETUP
5-269
5