5-304 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
GROUPED ELEMENTS CHAPTER 5: SETTINGS
5
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).
Figure 5-168: Phase undervoltage1 logic
5.7.14.3 Phase overvoltage (ANSI 59P, IEC PTOV)
SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) VOLTAGE ELEMENTS PHASE OVERVOLTAGE1(3)
PHASE UV1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
PHASE UV1
EVENTS: Disabled
Range: Disabled, Enabled
PHASE
OVERVOLTAGE1
PHASE OV1
FUNCTION: Disabled
Range: Disabled, Enabled
PHASE OV1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
PHASE OV1
PICKUP: 1.000 pu
Range: 0.004 to 3.000 pu in steps of 0.001
PHASE OV1 PICKUP
DELAY: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01
PHASE OV1 RESET
DELAY: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01
PHASE OV1 BLOCK:
Off
Range: FlexLogic Operand
PHASE OV1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
PHASE OV1
EVENTS: Disabled
Range: Disabled, Enabled
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