GE 845 Instruction Manual page 429

CHAPTER 4: SETPOINTS
ELEMENT OPERANDS
Tap Changer Failure Tap Ch Fail PKP
Tap Ch Fail OP
Tap Ch Fail Alarm PKP
Tap Ch Fail Alarm OP
Targets Active Target
Trip Bus Trip Bus 1 PKP
Trip Bus 1 OP
Trip Bus 2 to 6
Trip Circuit Monitoring TripCoil Mon 1 PKP
TripCoil Mon 1 OP
Under-Frequency Underfreq 1 PKP
Underfreq 1 OP
Underfreq 2 to 4
Virtual Input 1 to 32 VI # ON
VI # OFF
Virtual Outputs 1 to 32 VO # ON
VO # OFF
Volts per Hertz 1 V/Hz 1 PKP
V/Hz 1 OP
V/Hz 2, V/Hz 3
Volts per Hertz 2 Volts/Hz 2 PKP
Volts/Hz 2 OP
VT Fuse Failure VT Fuse Fail1 OP
VT Fuse1 V Loss
Wattmetric Ground Watt GndFlt 1 PKP
Fault Watt GndFlt 1 OP
Xfmr Loss Life Xfmr Loss Life PKP
Xfmr Loss Life OP
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845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
EVENT DESCRIPTION
Tap Changer Fail has picked up
Tap Changer Fail has operated
Tap Changer Failure Alarm has picked up
Tap Changer Failure Alarm has operated
At least one target is detected active
Asserted when the trip bus 1 element picks up
Asserted when the trip bus 1 element operates
The same set of operands as per Trip Bus 1
Trip Coil 1 Monitoring element has picked up.
Trip Coil 1 Monitoring element has operated for an amount of time
greater than the Close Circuit Monitor Pick-up Delay Time.
Underfrequency 1 has picked up
Underfrequency 1 has operated
The same set of operands as per Underfreq 1
# – any virtual input number
Flag is set, logic = 1
Flag is set, logic=0
The Volts per Hertz element 1 has picked up
The Volts per Hertz element 1 has operated
Sam set of operandss as for Volts per Hertz 1
The Volts per Hertz element 2 has picked up
The Volts per Hertz element 2 has operated
VT fuse failure detector 1 has operated
VT fuse 1 failure has lost voltage signals (V2 below 10% AND V1 below 5%
of nominal)
Wattmetric directional element 1 has picked up
Wattmetric directional element 1 has operated
Xfmr Loss Life element has picked up
Xfmr Loss Life element has operated
If Phase to Phase mode is selected in this protection element, in "EVENT DESCRIPTION"
column, "Phase A" becomes "Voltage AB", "Phase B" becomes "Voltage BC" and "Phase C"
becomes "Voltage CA".
Some operands can be re-named by the user. These are the names of the breakers in the
breaker control feature, the ID (identification) of contact inputs, the ID of virtual inputs, and
the ID of virtual outputs. If the user changes the default name or ID of any of these
operands, the assigned name will appear in the relay list of operands. The default names
are shown in the FlexLogic Operands table above.
Table 4-50: 845 FlexLogic Operators
TYPE SYNTAX
Editor INSERT
DELETE
End END
Logic gate NOT
OR(2)↓ OR(16)
DESCRIPTION NOTES
Insert a parameter in an
equation list.
Delete a parameter from
an equation list.
The first END
encountered signifies
the last entry in the list of
processed FlexLogic™
parameters.
Logical NOT Operates on the previous
parameter.
2 input OR gate↓ 16 Operates on the 2
input OR gate previous parameters.
↓Operates on the 16
previous parameters.
FLEXLOGIC
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