GE D60 Instruction Manual page 393

5 SETTINGS
d) PERMISSIVE OVER-REACHING TRANSFER TRIP (POTT)

PATH: SETTINGS CONTROL ELEMENTS
 POTT SCHEME

MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
This scheme is primarily intended for two-terminal line applications. The scheme uses an over-reaching Zone 2 distance
element to essentially compare the direction to a fault at both terminals of the line. Ground directional overcurrent functions
available in the relay can be used in conjunction with the Zone 2 distance element to key the scheme and initiate its opera-
tion. This provides increased coverage for high-resistance faults.
GE Multilin
 
PILOT SCHEMES POTT SCHEME
POTT SCHEME
FUNCTION: Disabled
POTT SCHEME BLOCK:
Off
POTT PERMISSIVE
ECHO: Disabled
POTT ECHO COND:
Off
POTT RX PICKUP
DELAY: 0.000 s
TRANS BLOCK PICKUP
DELAY: 0.020 s
TRANS BLOCK RESET
DELAY: 0.090 s
ECHO DURATION:
0.100 s
ECHO LOCKOUT:
0.250 s
LINE END OPEN PICKUP
DELAY: 0.050 s
POTT SEAL-IN
DELAY: 0.010 s
GND DIR O/C FWD:
Off
POTT NO OF COMM
BITS: 1
POTT RX1:
Off
POTT RX2:
Off
POTT RX3:
Off
POTT RX4:
Off
POTT SCHEME TARGET:
Self-Reset
POTT SCHEME EVENTS:
Disabled
D60 Line Distance Protection System
5.7 CONTROL ELEMENTS
Range: Disabled, Enabled
Range: FlexLogic™ operand
Range: Disabled, Enabled, Custom
Range: FlexLogic™ operand
Range: 0.000 to 65.535 s in steps of 0.001
Range: 0.000 to 65.535 s in steps of 0.001
Range: 0.000 to 65.535 s in steps of 0.001
Range: 0.000 to 65.535 s in steps of 0.001
Range: 0.000 to 65.535 s in steps of 0.001
Range: 0.000 to 65.535 s in steps of 0.001
Range: 0.000 to 65.535 s in steps of 0.001
Range: FlexLogic™ operand
Range: 1, 2, or 4
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: Self-Reset, Latched, Disabled
Range: Disabled, Enabled
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