GE L90 Instruction Manual page 604
Line current differential system
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- Instruction manual (832 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (700 pages)
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CONTROL ELEMENTS
5
5.8.12.4 Permissive overreaching transfer trip (POTT)
SETTINGS CONTROL ELEMENTS PILOT SCHEMES POTT SCHEME
POTT SCHEME
5-380
Figure 5-217: PUTT scheme logic
POTT SCHEME
FUNCTION: Disabled
POTT PERMISSIVE
ECHO: Disabled
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: 0.400 s
Range: Disabled, Enabled
Range: Disabled, Enabled
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
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
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