GE 845 Instruction Manual page 465

Transformer protection system
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CHAPTER 4: SETPOINTS
ELEMENT
OPERANDS
Ground Directional OC
Gnd Dir OC FWD
Gnd Dir OC REV
Harmonic Detection
Harm Det 1 PKP
Harm Det 1 OP
Harmonic Detection 2 to 6
Harmonic Derating
W1 Harm Derat PKP
W1 Harm Derat OP
W2 Harm Derat PKP
W2 Harm Derat OP
W3 Harm Derat PKP
W3 Harm Derat OP
Load Limit Reduced
Hottest Spot
Hottest-Spot PKP
Hottest-Spot OP
Local Control Mode
SBO Enabled
Local Mode ON
Local Mode OFF
BKR[X] Local Open
BKR[X] Local Close
BKR[X] Loc Blk Open
BKR[X] Loc Blk Close
BKR[X] Loc Blk Open By
BKR[X] Loc Blk Cls By
BKR[X] Tag On
BKR[X] Tag Off
BKR[X] Selected
SW[X] Local Open
SW[X] Local Close
SW[X] Loc Blk Open
SW[X] Loc Blk Close
SW[X] Loc Blk Open By
SW[X] Loc Blk Cls By
SW[X] Tag On
SW[X] Tag Off
SW[X] Selected
Loss of
Loss Of Comms PKP
Communications
Loss Of Comms OP
Neutral TOC
Ntrl TOC 1 PKP
Ntrl TOC 1 OP
Neutral TOC 2
Neutral TOC 2, Neutral TOC 3
Neutral IOC
Ntrl IOC 1 PKP
Ntrl IOC 1 OP
Ntrl IOC 2
Neutral IOC 2 to Neutral IOC6
Neutral Directional OC
Ntrl Dir OC FWD
Ntrl Dir OC REV
Neutral OV
Ntrl OV 1 PKP
Ntrl OV 1 OP
Negative sequence OV
NegSeq OV 1 PKP
NegSeq OV 1 OP
Negative Sequence TOC NegSeq TOC 1 PKP
NegSeq TOC 1 OP
Neg Seq TOC 2, Neg Seq TOC 3
Negative Sequence IOC NegSeq IOC 1 PKP
NegSeq IOC 1 OP
Neg Seq IOC 2, Neg Seq IOC 3
Negative Sequence
NegSeq DirOC FWD
Directional OC
NegSeq DirOC REV
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
EVENT DESCRIPTION
Ground directional overcurrent forward has operated
Ground directional overcurrent reverse has operated
Harmonic Detection 1 has picked up
Harmonic Detection 1 has operated
The same set of operands as per Harmonic Detection 1
Harmonic Derating W1 has picked up
Harmonic Derating W1 has operated
Harmonic Derating W2 has picked up
Harmonic Derating W2 has operated
Harmonic Derating W3 has picked up
Harmonic Derating W3 has operated
Harmonic Derating has detected load limit reduced
The Hottest-spot temperature element has picked up
The Hottest-spot temperature element has operated
Select Before Operate control mode is enabled
Local mode is ON (shows LM in display banner)
Local mode is OFF
Local Open command has been initiated to BKR[X]
Local Close command has been initiated to BKR[X]
Open command to BKR[X] is blocked
Close command to BKR[X] is blocked
Open command to BKR[X] is permitted, Block Open signal is bypassed
command to BKR[X] is permitted, Block Close signal is bypassed
The selected breaker is tagged
The selected breaker is untagged
Breaker BKR[X] has been selected in SLD
Local Open command has been initiated to SW[X]
Local Close command has been initiated to SW[X]
Open command to the switch is blocked
Close command to the switch is blocked
Open switch command is permitted, Block Open signal is bypassed
Close switch command is permitted, Block Close signal is bypassed
The selected breaker/switch is tagged
The selected breaker/switch is untagged
Disconnect Switch 1(8) has been selected in SLD
[X] - the element number.
Loss Of Comms has picked up
Loss Of Comms has operated
Neutral time overcurrent 1 has picked up
Neutral time overcurrent 1 has operated
The same set of operands as per Neutral TOC 1
Neutral IOC 1 has picked up
Neutral IOC 1 has operated
The same set of operands as per Neutral IOC 1
Neutral directional overcurrent forward has operated
Neutral directional overcurrent reverse has operated
Neutral overvoltage element 1 has picked up
Neutral overvoltage element 1 has operated
Negative-sequence overvoltage element 1 has picked up
Negative-sequence overvoltage element 1 has operated
Negative Sequence TOC 1 has picked up
Negative Sequence TOC 1 has operated
Same set of operands as shown for Negative Sequence TOC 1
Negative Sequence IOC has picked up
Negative Sequence IOC 1 has operated
Same set of operands as shown for Negative Sequence IOC 1
Negative Sequence directional overcurrent forward has operated
Negative Sequence directional overcurrent reverse has operated
FLEXLOGIC
4–337

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