Interbay Bus Functions; Introduction; Basic Configuration - Hitachi ABB RELION REB500 Communication Protocol Manual

Distributed busbar protection

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Table Of Contents

Table of Contents

1MRK 511 451-UEN Rev. C

Section 3

3.1

Introduction

An interface is available for connecting the numerical busbar protection to a station

automation system or station monitoring system (SCS/SMS).

For an overview of REB500's communication interfaces, see the

In contrast to feeder control and protection bay units, REB500 is equipped with only a single

interbay bus interface via which all the REB500 bay units in the entire station communicate.

This has to be taken into account by the various bus protocols.

3.2

Basic configuration

The fourth octet in the Data Unit Identification field of an ASDU determines the common

address of ASDU. It normally has to be the same as the station address on the link layer.

Exceptions are permitted where additional common ASDU addresses are needed because of

multiple instances of functions.

In case of REB500, this exception allowed in the IEC recommendation is used to be able to

address the Central Unit and the Bay Units via a single physical connection.

Common Address of ASDU – CAA

Basic setting:

1-60

255

The dialog for configuring the communication is accessed by selecting HMI500

Configuration/Communication/SCS Configuration.

Distributed busbar protection REB500

Communication protocol manual IEC 60870-5-103