Shared Operands - GE D90 Plus Instruction Manual

SHARED OPERANDS

Shared operands
500
High Alarm Pickup, Low Alarm Pickup, High-High Alarm Pickup, Low-Low Alarm Pickup
Range: –90.00 to 90.00 pu in steps of 0.01
Default: 1.00 pu
These settings specify the pickup thresholds for the alarm in per-unit values. A fixed
hysteresis of 3% is applied.
High Alarm Delay, Low Alarm Delay, High-High Alarm Delay, Low-Low Alarm Delay
Range: 1.0 to 300.0 seconds in steps of 0.1
Default: 1.0 seconds
These settings specify the time delays for the four alarm pickup types.
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.
Plus
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 11: METERING
system into the following seven