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CHAPTER 6: SETPOINTS
Auxiliary overvoltage (59X)
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
The relay has one Auxiliary Overvoltage element per protection group. The element is
intended for monitoring overvoltage conditions of the auxiliary voltage input. A typical
application for this element is monitoring the zero sequence voltage (3V_0) from an open
corner Delta VT connection. The nominal voltage for the auxiliary voltage input is set under
Setpoints > S2 System Setup > Voltage Sensing > Aux VT Secondary.
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) > AUXILIARY OV
AUX OV FUNCTION
Range: Disabled, Alarm, Latched Alarm, Trip
Default: Disabled
For details see
Common
AUX OV PKP
Range: 0.00 to 1.25 x VT in steps of 0.01
Default: 0.3 x VT
This setting defines the auxiliary OV pickup level.
AUX OV DELAY
Range: 0.00 to 600.00 sec in steps of 0.01
Default: 2.0 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.
S3 PROTECTION
6–85
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