ABB Relion 670 Series Technical Reference Manual page 732

Line differential protection ansi

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Table of Contents

Introduction

The interlocking for a double busbar double circuit breaker bay including DB_BUS_A

(3), DB_BUS_B (3) and DB_LINE (3) functions are used for a line connected to a

double busbar arrangement according to figure 369.

ANSI04000518 V1 EN

Switchyard layout double circuit breaker

Three types of interlocking modules per double circuit breaker bay are defined.

DB_LINE (3) is the connection from the line to the circuit breaker parts that are

connected to the busbars. DB_BUS_A (3) and DB_BUS_B (3) are the connections

from the line to the busbars.

1MRK505222-UUS C

en04000518_ansi.vsd

Technical reference manual

Relion red670