GE Power Management 750/760 Feeder Management Relay 12-
47
12 S5 PROTECTION 12.6 NEGATIVE SEQUENCE
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12.6.5 NEGATIVE SEQUENCE VOLTAGE
To protect against loss of one or two source phases, or against a reversed phase sequence of voltage, the
negative sequence voltage element can be used to either cause a trip or generate an alarm when the negative
sequence voltage exceeds the specified threshold for a specified time delay.
■ NEG SEQ VOLTAGE
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The Negative Sequence Voltage setpoints path is:
\ SETPOINTS \ S5 PROTECTION \ NEGATIVE SEQUENCE \ NEG SEQ VOLTAGE
NEG SEQ VOLTAGE
FUNCTION: Disabled
Range: Disabled, Trip, Alarm, Latched Alarm, Control
Select the required function.
NEG SEQ VOLTAGE
RELAYS (3-7): -----
Range: Any Combination of the 3-7 AUXILIARY Relays
Select the output relays required.
NEG SEQ VOLTAGE
PICKUP: 0.10 x VT
Range: 0.00 to 1.25 in steps of 0.01 x VT
Enter the pickup as a fraction of the bus VT nominal voltage.
NEG SEQ VOLTAGE
DELAY: 2.0 s
Range: 0.0 to 6000.0 in steps of 0.1 s
Select the delay required.
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