GE 845 Instruction Manual page 340

PROTECTION
4–236
Path:
Setpoints > Protection > Group 1(6) > Frequency > Underfrequency 1(4)
FUNCTION
Range: Disabled, Trip, Alarm, Latched Alarm, Configurable
Default: Disabled
FREQUENCY INPUT
Range: J2-3VT, J2-Vx
Default: J2-3VT
PICKUP
Range: 20.00 to 65.00 Hz in steps of 0.01 Hz
Default: 59 Hz
PICKUP DELAY
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 2.000 s
DROPOUT DELAY
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 2.000 s
MINIMUM VOLTAGE
Range: 0.000 to 1.250 x VT in steps of 0.001 x VT
Default: 0.700 x VT
The setting sets the minimum voltage for Underfrequency element operation specified
per times VT. The setpoint prevents incorrect operation before energization of the source
to the relay location, and during voltage dips.
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS