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GE Power Management 750/760 Feeder Management Relay 12-

12 S5 PROTECTION 12.6 NEGATIVE SEQUENCE

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.

GE 750 User Manual

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