Protection Flexlogic - GE D90 Plus Instruction Manual

Line distance protection system

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Table of Contents

CHAPTER 7: PROTECTION

Protection FlexLogic™

LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL

Figure 282: Shared operands configuration window

The left side of this screen displays all D90

function as shared operands. Select any operands from the other five primary features by

clicking on the >> button. Operands may be de-assigned as shared operands by pressing

the << button.

The arrangement of internal digital logic in the D90

programmable parameters. The logic upon which individual features are designed is fixed,

and all other logic, from digital input signals through elements or combinations of

elements to digital outputs, is variable. The user has complete control of all variable logic

through FlexLogic™. In general, the system receives analog and digital inputs which it uses

to produce analog and digital outputs. The major sub-systems of a generic UR

series device involved in this process are shown below.

PROTECTION FLEXLOGIC™

operands that are available to the protection

combines fixed and user-