GE 845 Instruction Manual page 312

PROTECTION
4–208
PICKUP
Range: 0.00 to 1.50 x VT in steps of 0.01 x VT
Default: 1.00 x VT
This setting sets the Auxiliary Undervoltage Pickup level specified per times VT. For
example, a Pickup setting of 0.80 x VT with a 13800:115 VT translates into 11.04kV (or
92V secondary).
MINIMUM VOLTAGE
Range: 0.00 to 1.50 x VT in steps of 0.01 x VT
Default: 0.20 x VT
This setting sets the minimum operating voltage for the undervoltage Pickup level
specified per times VT.
UNDERVOLTAGE CURVES
Range: Definite Time, Inverse Time
Default: Definite Time
This setting provides the selection of definite time delay or time delay inverse
undervoltage curves.
PICKUP DELAY
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 1.000 s
If Inverse Time is selected as an Undervoltage Curve setpoint, the Pickup Delay value is
loaded to variable D in the curve formula. For more information, refer to
Curves on page 4-203.
BLOCK
Range: Off, Any operand from the list of FlexLogic operands
Default: Off
OUTPUT RELAY 3 (X)
Range: Do Not Operate, Operate
Default: Do Not Operate
EVENTS
Range: Enabled, Disabled
Default: Enabled
TARGETS
Range: Disabled, Self-reset, Latched
Default: Self-reset
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
Undervoltage