CHAPTER 4: SETPOINTS FLEXLOGIC
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–385
NOTE:
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 4-38: 869 FlexLogic Operators
Trip Bus Trip Bus 1 PKP
Trip Bus 1 OP
Trip Bus 2 to 6
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 Circuit Monitoring TripCoil Mon 1 PKP
TripCoil Mon 1 OP
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.
Undercurrent Undercur[X] Alarm PKP
Undercur[X] Alarm OP
Undercur[X] Trip PKP
Undercur[X] Trip OP
Undercurrent[X] Alarm has picked up.
Undercurrent[X] Alarm has operated.
Undercurrent[X] Trip has picked up.
Undercurrent[X] Trip has operated.
Underpower Underpwr Alarm PKP
Underpwr PKP
Underpwr Alarm OP
Underpwr OP
Underpower alarm stage picks up.
Underpower trip stage picks up.
Underpower alarm stage operates.
Underpower trip stage operates.
UnderFrequency Underfreq 1 PKP
Underfreq 1 OP
Underfreq 2 to 4
Underfrequency 1 has picked up
Underfrequency 1 has operated
The same set of operands as per Underfreq 1
VFD VFD Bypassed
VFD Not Bypassed
The VFD is bypassed by the switch
The VFD is not bypassed by the switch
Virtual Input 1 to 32 VI # ON
VI # OFF
# – any virtual input number
Virtual Outputs 1 to 32 VO # ON
VO # OFF
Flag is set, logic = 1
Flag is set, logic = 0
Volts per Hertz 1 V/Hz 1 PKP
V/Hz 1 OP
The Volts per Hertz element 1 has picked up
The Volts per Hertz element 1 has operated
VT Fuse Failure VT Fuse Fail1 OP
VT Fuse1 V Loss
VT fuse failure detector 1 has operated
VT fuse 1 failure has lost voltage signals (V2 below 10% AND V1 below 5%
of nominal)
ELEMENT OPERANDS EVENT DESCRIPTION
TYPE SYNTAX DESCRIPTION NOTES
Editor INSERT Insert a parameter in an
equation list.
DELETE Delete a parameter from
an equation list.
End END The first END
encountered signifies
the last entry in the list of
processed FlexLogic™
parameters.
One-shot POSITIVE ONE SHOT One shot that responds
to a positive going edge.
A ‘one shot’ refers to a
single input gate that
generates a pulse
response to an edge on
the input. The output
from a ‘one shot’ is True
(positive) for only one
pass through the
FlexLogic equation. There
is a maximum of 64 ‘one
shots’.
NEGATIVE ONE
SHOT
One shot that responds
to a negative going
edge.
DUAL ONE SHOT One shot that responds
to both the positive and
negative going edges.
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