GE D60 Instruction Manual page 286
Line distance relay
Hide thumbs
Also See for D60:
- Instruction manual (826 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (708 pages)
Table of Contents
Advertisement
5.6 CONTROL ELEMENTS
d) PERMISSIVE OVER-REACHING TRANSFER TRIP (POTT)
PATH: SETTINGS
CONTROL ELEMENTS
POTT SCHEME
5
This scheme is intended for two-terminal line applications only. The scheme uses an over-reaching Zone 2 distance ele-
ment 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.
For proper operation, the Zone 2 phase and ground distance elements must be enabled, configured and set per rules of
distance relaying. The Line Pickup element should be enabled, configured and set properly to detect line-end-open/weak-
infeed conditions. If used by this scheme, the selected ground directional overcurrent function(s) must be enabled, config-
ured and set accordingly.
5-196
PILOT SCHEMES
POTT SCHEME
FUNCTION: Disabled
POTT PERMISSIVE
MESSAGE
ECHO: Disabled
POTT ECHO COND:
MESSAGE
Off
POTT RX PICKUP
MESSAGE
DELAY: 0.000 s
TRANS BLOCK PICKUP
MESSAGE
DELAY: 0.020 s
TRANS BLOCK RESET
MESSAGE
DELAY: 0.090 s
ECHO DURATION:
MESSAGE
0.100 s
ECHO LOCKOUT:
MESSAGE
0.250 s
LINE END OPEN PICKUP
MESSAGE
DELAY:
0.050 s
POTT SEAL-IN
MESSAGE
DELAY:
0.010 s
GND DIR O/C FWD:
MESSAGE
Off
POTT NO OF COMM
MESSAGE
BITS: 1
POTT RX1:
MESSAGE
Off
POTT RX2:
MESSAGE
Off
POTT RX3:
MESSAGE
Off
POTT RX4:
MESSAGE
Off
POTT SCHEME TARGET:
MESSAGE
Self-Reset
POTT SCHEME EVENTS:
MESSAGE
Disabled
D60 Line Distance Relay
POTT SCHEME
Range: Disabled, Enabled
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
5 SETTINGS
GE Multilin
Advertisement
Table of Contents
