GE D90 Plus, Instruction Manual

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402 D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION FLEXLOGIC™ CHAPTER 7: PROTECTION
Protection FlexLogic™ gates and operators
The characteristics of logic gates used in protection FlexLogic™ equations are tabulated
below.
Table 23: Protection FlexLogic™ gate characteristics
The following operators are available for use in protection FlexLogic™ equations.
Table 24: Protection FlexLogic™ operators
Element
(digital)
Pickup
DIG ELEM 1 PKP
The output operand is at logic 1.
Dropout
DIG ELEM 1 DPO
This operand is the logical inverse of the
pickup operand.
Operate
DIG ELEM 1 OP
The input operand has been at logic 1 for the
programmed pickup delay time, or has been
at logic 1 for this period and is now at logic 0
but the reset timer has not finished timing.
Fixed On
ON
Logic 1.
Off
OFF
Logic 0.
Remote
input
On
REMOTE IN 1 ON
The remote input is presently in the on state.
Virtual
input
On
VIRT IP 1 ON
The virtual input is presently in the on state.
Virtual
output
On
VIRT OP 1 ON
The virtual input is presently in the on state.
Type State Example Characteristics (input is logic 1 or “on” if...)
Gate Inputs Output is logic 1 if...
NOT 1 the input is logic 0
OR 2 to 16 any input is logic 1
AND 2 to 16 all inputs are logic 1
NOR 2 to 16 all inputs are logic 0
NAND 2 to 16 any input is logic 0
XOR 2 only one input is logic 1
Type Syntax Description Operation
Editor INSERT Insert a parameter in the equation
list.
---
DELETE Delete a parameter from an
equation list.
---
End END The first END operator signifies the
last entry in the FlexLogic™
equation.
---
One
shots
POSITIVE ONE
SHOT
One shot that corresponds to a
positive-going edge.
A one shot refers to a single input
gate that generates a pulse in
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 are
a maximum of 64 one shots.
NEGATIVE ONE
SHOT
One shot that corresponds to a
negative-going edge.
DUAL ONE SHOT One shot that responds to both the
positive and negative-going edges.