GE D90 Plus Instruction Manual page 311

Line distance protection system

Hide thumbs Also See for D90 Plus:

Table of Contents

CHAPTER 7: PROTECTION

Terminal one-pole open

LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL

Figure 245: Terminal three-pole open logic

The autoreclose scheme also has dedicated logic to determine if one pole is opened at the

local terminal. For single breaker operation, the

operand is used to derive this signal. For the 1&2 sequence, both breakers must

either declare one pole open or be open or out-of-service. For the 1-2 sequence, breaker 1

must declare one pole open and breaker 2 must declare one pole open or be open or out-

of-service. For the 2-1 sequence, breaker 2 must declare one pole open and breaker 1

must declare one pole open or be open or out-of-service. Alternately, a user-defined

setting is available to generate this signal.

CONTROL ELEMENTS

BREAKER 1 ONE P OPEN

BREAKER 2 ONE P