GE G30 Instruction Manual page 338

5.6 GROUPED ELEMENTS
e) NEGATIVE SEQUENCE OVERVOLTAGE (ANSI 59Q, IEC PTOV)

PATH: SETTINGS GROUPED ELEMENTS
 NEG SEQ OV1

There are three negative-sequence overvoltage elements available.
5
The negative-sequence overvoltage element may be used to detect loss of one or two phases of the source, a reversed
phase sequence of voltage, or a non-symmetrical system voltage condition.
5-198

SETTING GROUP 1(6)
NEG SEQ OV1
FUNCTION: Disabled
NEG SEQ OV1 SIGNAL
MESSAGE
SOURCE: SRC 1
NEG SEQ OV1 PICKUP:
MESSAGE
0.300 pu
NEG SEQ OV1 PICKUP
MESSAGE
DELAY:
NEG SEQ OV1 RESET
MESSAGE
DELAY:
NEG SEQ OV1 BLOCK:
MESSAGE
Off
NEG SEQ OV1 TARGET:
MESSAGE
Self-reset
NEG SEQ OV1 EVENTS:
MESSAGE
Disabled
Figure 5–84: NEGATIVE-SEQUENCE OVERVOLTAGE SCHEME LOGIC
G30 Generator Protection System

VOLTAGE ELEMENTS
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: 0.000 to 1.250 pu in steps of 0.001
Range: 0.00 to 600.00 s in steps of 0.01
0.50 s
Range: 0.00 to 600.00 s in steps of 0.01
0.50 s
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
5 SETTINGS

NEG SEQ OV1(3)
GE Multilin