GE D90 Plus Instruction Manual page 378

PROTECTION FLEXLOGIC™
370
PHASE UV1 OP C ........................................Asserted when phase C of the phase undervoltage 1 element
PHASE UV1 PKP ..........................................Asserted when at least one phase of the phase undervoltage 1
PHASE UV1 PKP A ......................................Asserted when phase A of the phase undervoltage 1 element
PHASE UV1 PKP B ......................................Asserted when phase B of the phase undervoltage 1 element
PHASE UV1 PKP C ......................................Asserted when phase C of the phase undervoltage 1 element
PHASE UV2....................................................Same set of operands as shown above for the phase
Permissive overreach transfer trip (POTT scheme) operands
POTT OP .........................................................Asserted when the permissive over-reaching transfer trip
POTT TRIP 3P................................................Asserted when the permissive over-reaching transfer trip
POTT TRIP A ..................................................Asserted when the permissive over-reaching transfer trip
POTT TRIP B ..................................................Asserted when the permissive over-reaching transfer trip
POTT TRIP C ..................................................Asserted when the permissive over-reaching transfer trip
POTT TX ..........................................................Asserted when the permissive signal is sent.
POTT TX1........................................................Asserted when the permissive over-reaching transfer trip
POTT TX2........................................................Asserted when the permissive over-reaching transfer trip
POTT TX3........................................................Asserted when the permissive over-reaching transfer trip
POTT TX4........................................................Asserted when the permissive over-reaching transfer trip
Power swing detection operands
POWER SWING 50DD...............................Asserted when the power swing detection element detects a
POWER SWING BLOCK............................Asserted when the power swing detection blocking element
POWER SWING INCOMING....................Asserted when an unstable power swing is detected (incoming
POWER SWING INNER .............................Asserted when the positive-sequence impedance is in the inner
POWER SWING MIDDLE..........................Asserted when the positive-sequence impedance is in the
POWER SWING OUTER............................Asserted when the positive-sequence impedance is in the outer
POWER SWING OUTGOING...................Asserted when an unstable power swing is detected (outgoing
POWER SWING TMR1 PKP .....................Asserted when power swing timer 1 picks up.
POWER SWING TMR2 PKP .....................Asserted when power swing timer 2 picks up.
POWER SWING TMR3 PKP .....................Asserted when power swing timer 3 picks up.
POWER SWING TMR4 PKP .....................Asserted when power swing timer 4 picks up.
operates.
element picks up.
picks up.
picks up.
picks up.
undervoltage 2 element.
scheme operates.
scheme operates to trip all three phases.
scheme operates to trip phase A.
scheme operates to trip phase B.
scheme operates to trip phase C.
scheme asserts transit bit number 1.
scheme asserts transit bit number 2.
scheme asserts transit bit number 3.
scheme asserts transit bit number 4.
disturbance other than a power swing.
operates.
locus).
characteristic.
middle characteristic.
characteristic.
locus).
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION