GE L90 Instruction Manual page 418

Line current differential system
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FLEXLOGIC
Operand type
ELEMENT:
Frequency rate of
change
ELEMENT:
FlexElements
ELEMENT:
Ground distance
ELEMENT:
Ground
5
instantaneous
overcurrent
ELEMENT:
Ground time
overcurrent
ELEMENT:
Hybrid POTT
(Hybrid permissive
overreach transfer
trip)
ELEMENT:
Non-volatile latches
ELEMENT:
Line pickup
ELEMENT:
Load encroachment
5-194
Operand syntax
FREQ RATE 1 PKP
FREQ RATE 1 DPO
FREQ RATE 1 OP
FREQ RATE 2 to 4
FxE 1 PKP
FxE 1 OP
FxE 1 DPO
FxE 2 to 8
GND DIST Z1 PKP
GND DIST Z1 OP
GND DIST Z1 OP A
GND DIST Z1 OP B
GND DIST Z1 OP C
GND DIST Z1 PKP A
GND DIST Z1 PKP B
GND DIST Z1 PKP C
GND DIST Z1 SUPN IA
GND DIST Z1 SUPN IB
GND DIST Z1 SUPN IC
GND DIST Z1 SUPN IN
GND DIST Z1 DPO A
GND DIST Z1 DPO B
GND DIST Z1 DPO C
GND DIST Z1 DIR SUPN
GND DIST Z2 to 5
GROUND IOC1 PKP
GROUND IOC1 OP
GROUND IOC1 DPO
GROUND IOC2 to 12
GROUND TOC1 PKP
GROUND TOC1 OP
GROUND TOC1 DPO
GROUND TOC2 to 6
HYBRID POTT TX1
HYBRID POTT TX2
HYBRID POTT TX3
HYBRID POTT TX4
HYBRID POTT TRIP A
HYBRID POTT TRIP B
HYBRID POTT TRIP C
HYBRID POTT TRIP 3P
HYBRID POTT OP
LATCH 1 ON
LATCH 1 OFF
LATCH 2 to 16
LINE PICKUP OP
LINE PICKUP PKP
LINE PICKUP DPO
LINE PICKUP I<A
LINE PICKUP I<B
LINE PICKUP I<C
LINE PICKUP UV PKP
LINE PICKUP LEO PKP
LINE PICKUP RCL TRIP
LOAD ENCHR PKP
LOAD ENCHR OP
LOAD ENCHR DPO
Operand description
The frequency rate of change 1 element has picked up
The frequency rate of change 1 element has dropped out
The frequency rate of change 1 element has operated
Same set of operands as shown for FREQ RATE 1
FlexElement 1 has picked up
FlexElement 1 has operated
FlexElement 1 has dropped out
Same set of operands as shown for FxE 1
Ground distance zone 1 has picked up
Ground distance zone 1 has operated
Ground distance zone 1 phase A has operated
Ground distance zone 1 phase B has operated
Ground distance zone 1 phase C has operated
Ground distance zone 1 phase A has picked up
Ground distance zone 1 phase B has picked up
Ground distance zone 1 phase C has picked up
Ground distance zone 1 neutral 1A is supervising
Ground distance zone 1 neutral 1B is supervising
Ground distance zone 1 neutral 1C is supervising
Ground distance zone 1 neutral is supervising
Ground distance zone 1 phase A has dropped out
Ground distance zone 1 phase B has dropped out
Ground distance zone 1 phase C has dropped out
Ground distance zone 1 directional is supervising
Same set of operands as shown for GND DIST Z1
Ground instantaneous overcurrent 1 has picked up
Ground instantaneous overcurrent 1 has operated
Ground instantaneous overcurrent 1 has dropped out
Same set of operands as shown for GROUND IOC 1
Ground time overcurrent 1 has picked up
Ground time overcurrent 1 has operated
Ground time overcurrent 1 has dropped out
Same set of operands as shown for GROUND TOC1
Hybrid permissive over-reaching transfer trip asserts transmit bit 1
Hybrid permissive over-reaching transfer trip asserts transmit bit 2
Hybrid permissive over-reaching transfer trip asserts transmit bit 3
Hybrid permissive over-reaching transfer trip asserts transmit bit 4
Hybrid permissive over-reaching transfer trip has operated to trip phase A
Hybrid permissive over-reaching transfer trip has operated to trip phase B
Hybrid permissive over-reaching transfer trip has operated to trip phase C
Hybrid permissive over-reaching transfer trip has tripped all three phases
Hybrid permissive over-reaching transfer trip has operated
Non-volatile latch 1 is ON (Logic = 1)
Non-volatile latch 1 is OFF (Logic = 0)
Same set of operands as shown for LATCH 1
Line pickup has operated
Line pickup has picked up
Line pickup has dropped out
Line pickup detected phase A current below 5% of nominal
Line pickup detected phase B current below 5% of nominal
Line pickup detected phase C current below 5% of nominal
Line pickup undervoltage has picked up
Line pickup line end open has picked up
Line pickup operated from overreaching zone 2 when reclosing the line (zone
1 extension functionality)
Load encroachment has picked up
Load encroachment has operated
Load encroachment has dropped out
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS

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