Shared Operands - GE D90 Plus Instruction Manual

CHAPTER 7: PROTECTION

Shared operands

PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Operate
Range: any FlexLogic™ operand or shared operand
Default: as shown above
This setting selects an operand (virtual output, element state, contact input, or virtual
input) that will operate the contact output when asserted.
Seal-In
Range: any FlexLogic™ operand or shared operand
Default: as shown above
This setting selects an operand (virtual output, element state, contact input, or virtual
input) that will seal-in the contact output when asserted.
Voltage Threshold
Range: 20 to 250 volts in steps of 1
Default: 20
This setting specifies determines the level at which the Contact Op 1 VOn and Contact
Op 1 VOff operands function. It is only shown for contact outputs that have monitoring.
Events
Range: Enabled, Disabled
Default: Enabled
If this setting is "Enabled", every change in the contact output state will trigger an event
in the sequence of events recorder.
Plus
The EnerVista UR Setup software groups the D90
primary functions. Each function has its own setting parameters and each generates its
own outputs in the form of operands.
• Protection.
• Automation.
• Metering.
• Communications.
• Digital fault recorder (DFR).
• Equipment manager.
• Front panel interface (HMI).
However, it is often desirable for an output from an element within one function can be
available to an element within another function. For instance, it may be useful for the
digital fault recorder to record the output operands of any protection element.
Consequently a fixed, predetermined set of operands is available as to each function as
shown below.
PROTECTION INPUTS AND OUTPUTS
Plus
system into the following seven
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