GE Multilin 850 Instruction Manual page 544

FLEXLOGIC
ELEMENT OPERANDS
Virtual Outputs 1 to 32 VO # ON
VO # OFF
VT Fuse Failure VT Fuse Fail1 OP
VT Fuse1 V Loss
Wattmetric Ground Fault Watt GndFlt 1 PKP
Watt GndFlt 1 OP
NOTE:
4–412
EVENT DESCRIPTION
Flag is set, logic = 1
Flag is set, logic=0
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
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 4-40: 850 FlexLogic Operators
TYPE SYNTAX
Editor INSERT
DELETE
End END
One-shot POSITIVE ONE SHOT One shot that responds
NEGATIVE ONE
SHOT
DUAL ONE SHOT
DESCRIPTION
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.
to a positive going edge.
One shot that responds
to a negative going
edge.
One shot that responds
to both the positive and
negative going edges.
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
NOTES
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'.