GE G30 Instruction Manual page 400

GROUPED ELEMENTS
This element is used to give a time-delay operating characteristic versus the applied fundamental voltage (phase-to-
ground or phase-to-phase for wye VT connection, or phase-to-phase for delta VT connection) or as a definite time
element. The element resets instantaneously if the applied voltage exceeds the dropout voltage. The delay setting selects
the minimum operating time of the phase undervoltage. The minimum voltage setting selects the operating voltage below
which the element is blocked (a setting of "0" allows a dead source to be considered a fault condition).
5
5.7.10.3 Phase overvoltage (ANSI 59P, IEC PTOV)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  VOLTAGE ELEMENTS  PHASE OVERVOLTAGE1(3)
 PHASE
 OVERVOLTAGE1
There are three phase overvoltage elements available. A phase overvoltage element is used as an instantaneous element
with no intentional time delay or as a definite time element. The input voltage is the phase-to-phase voltage, either
measured directly from delta-connected VTs or as calculated from phase-to-ground (wye) connected VTs. The figure
shows specific voltages to be used for each phase.
5-226
Figure 5-118: Phase undervoltage1 logic
PHASE OV1

FUNCTION: Disabled
PHASE OV1 SIGNAL

SOURCE: SRC 1
PHASE OV1

PICKUP: 1.000 pu
PHASE OV1 PICKUP

DELAY: 1.00 s
PHASE OV1 RESET

DELAY: 1.00 s
PHASE OV1 BLOCK:

Off
PHASE OV1

TARGET: Self-reset
PHASE OV1

EVENTS: Disabled
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: 0.004 to 3.000 pu in steps of 0.001
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: FlexLogic Operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS