Introduction; This Manual; Use Of Symbols; Intended Audience - ABB REF 542plus Technical Reference Manual

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Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual

Introduction

This manual

This manual provides thorough information on the protection relay REF 542plus
and its applications, focusing on giving a technical description of the relay.

Use of symbols

This publication includes the following icons that point out safety-related conditions
or other important information:
The electrical warning icon indicates the presence of a hazard which
could result in electrical shock.
The warning icon indicates the presence of a hazard which could result
in personal injury.
The caution icon indicates important information or warning related to
the concept discussed in the text. It might indicate the presence of a
hazard which could result in corruption of software or damage to
equipment or property.
The information icon alerts the reader to relevant facts and conditions.
Although warning hazards are related to personal injury, it should be understood
that operation of damaged equipment could, under certain operational conditions,
result in degraded process performance leading to personal injury or death.
Therefore, comply fully with all warning and caution notices.

Intended audience

This manual is intended for operators and engineers to support normal use of as
well as configuration of the product.
REF 542plus REF 542plus
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