GE D90 Plus Instruction Manual page 430

PROTECTION FLEXLOGIC
420
HYBRID POTT TRIP A.................................Asserted when the hybrid permissive overreaching transfer trip
HYBRID POTT TRIP B.................................Asserted when the hybrid permissive overreaching transfer trip
HYBRID POTT TRIP C.................................Asserted when the hybrid permissive overreaching transfer trip
HYBRID POTT TRIP 3P...............................Asserted when the hybrid permissive overreaching transfer trip
HYBRID POTT TX1 ......................................Asserted when the hybrid permissive overreaching transfer trip
HYBRID POTT TX2 ......................................Asserted when the hybrid permissive overreaching transfer trip
HYBRID POTT TX3 ......................................Asserted when the hybrid permissive overreaching transfer trip
HYBRID POTT TX4 ......................................Asserted when the hybrid permissive overreaching transfer trip
Non-volatile latch operands
LATCH 1 OFF.................................................Asserted when non-volatile latch 1 is off (logic 0).
LATCH 1 ON ..................................................Asserted when non-volatile latch 1 is on (logic 1).
LATCH 2 to 16..............................................The operands listed above are also available for non-volatile
Line pickup operands
LINE PICKUP DPO.......................................Asserted when the line pickup element drops out.
LINE PICKUP I<A .........................................Asserted when the line pickup element detects phase A current
LINE PICKUP I<B .........................................Asserted when the line pickup element detects phase B current
LINE PICKUP I<C .........................................Asserted when the line pickup element detects phase C current
LINE PICKUP LEO PKP...............................Asserted when the line pickup element line end open feature
LINE PICKUP OP ..........................................Asserted when the line pickup element operates.
LINE PICKUP PKP........................................Asserted when the line pickup element picks up.
LINE PICKUP RCL TRIP..............................Asserted when the line pickup element operates from
LINE PICKUP UV PKP.................................Asserted when the line pickup undervoltage protection picks
Load encroachment operands
LOAD ENCRO DPO .....................................Asserted when the load encroachment element picks up.
LOAD ENCRO OP.........................................Asserted when the load encroachment element operates.
LOAD ENCRO PKP ......................................Asserted when the load encroachment element drops out.
Negative-sequence directional overcurrent operands
NEG SEQ DIR OC1 FWD...........................Asserted when the negative-sequence directional overcurrent
NEG SEQ DIR OC1 REV.............................Asserted when the negative-sequence directional overcurrent
NEG SEQ DIR OC2 FWD...........................Asserted when the negative-sequence directional overcurrent
scheme operates to trip phase A.
scheme operates to trip phase B.
scheme operates to trip phase C.
scheme operates to trip all three phases.
scheme asserts transmit bit 1.
scheme asserts transmit bit 2.
scheme asserts transmit bit 3.
scheme asserts transmit bit 4.
latches 2 to 16.
less than 5% of nominal.
less than 5% of nominal.
less than 5% of nominal.
picks up.
overreaching zone 2 when reclosing the line (zone 1 extension
functionality).
up.
1 element forward mode operates.
1 element reverse mode operates.
2 element forward mode operates.
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION