Automation Logic - GE D90 Plus Instruction Manual

Line distance protection system

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CHAPTER 8: AUTOMATION

Automation logic

LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL

Figure 402: Shared operands configuration window

The left side of this screen displays all D90

automation 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.

internal digital logic combines fixed and user-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 automation logic. In general, the

system receives digital inputs which it uses to produce digital outputs and analog inputs

which it uses to produce analog outputs. The major sub-systems of a generic UR

series relay involved in this process are shown below.

operands that are available to the

AUTOMATION LOGIC