GE 850 - Page 343

CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–75
Figure 6-30: Load Encroachment logic diagram
SETPOINTS
Positive seq voltage (V_1)
SETPOINTS
LOAD ENCROACHMENT FUNCTION: Disabled
LOAD ENCROACHMENT REACH:
AND
Positive seq current (I_1)
RUN
SETPOINTS
LOAD ENCROACHMENT BLOCK: Off = 0
Enabled
FlexLogic Operands
Load Encro OP Load Encro PKP
LOAD ENCROACHMENT ANGLE:
SETPOINT
LOAD ENCROACHMENT MINIMUM VOLTAGE : |V_1| > MINIMUM
SETPOINTS
Do Not Operate, Operate OUTPUT RELAYS 3 to 7
AND
SETPOINTS
LOAD ENCROACHMENT PICKUP DELAY: LOAD ENCROACHMENT DROPOUT DELAY:
t
PKP
t
DPO
SETPOINT
CT INPUT: - CT Bank 1 – J1
850 Only
VT INPUT: - Ph VT Bank 1 – J1
894044A2.cdr