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S3 PROTECTION
Negative sequence overvoltage (59_2)
6–80
The relay has one Negative Sequence Overvoltage element per protection group. The
negative sequence overvoltage may be used to detect the loss of one or two phases of the
source, a reversed voltage phase sequence, or non-system voltage conditions.
The following path is available using the keypad. For instructions on how to use the
keypad, please refer to Chapter 3 - Working with the Keypad.
PATH:
SETPOINTS > S3 PROTECTION > SETPOINT GROUP 1(2) > NEGATIVE SEQ. OV
NEG SEQ OV FUNCTION
Range: Disabled, Alarm, Latched Alarm, Trip
Default: Disabled
For details see
Common
NEG SEQ OV PKP
Range: 0.00 to 1.25 x VT in steps of 0.01
Default: 0.30 x VT
This setting defines the negative sequence OV pickup level.
NEG SEQ OV DELAY
Range: 0.00 to 600.00 sec in steps of 0.01 sec
Default: 2.00 s
This setting specifies the time delay before OV operation.
OUTPUT RELAY X
For details see
Common
BLOCK 1/2/3
For details see
Common
setpoints.
setpoints.
setpoints.
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS
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