GE 845 Instruction Manual page 469

CHAPTER 4: SETPOINTS
ELEMENT OPERANDS
Virtual Outputs 1 to 32 VO # ON
VO # OFF
Volts per Hertz 1 V/Hz 1 PKP
V/Hz 1 OP
Volts per Hertz 2 V/Hz 2 PKP
V/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
NOTE:
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
EVENT DESCRIPTION
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
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 4-38: 845 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 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.
A 'one shot' refers to a
to a positive going edge. single input gate that
generates a pulse
One shot that responds
response to an edge on
to a negative going
the input. The output
edge.
from a 'one shot' is True
(positive) for only one
One shot that responds
pass through the
to both the positive and
FlexLogic equation. There
negative going edges.
is a maximum of 64 'one
shots'.
FLEXLOGIC
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