• Multipurpose protection describes the general protection function for current and
voltage.
• Secondary system supervision describes current based functions for current circuit
supervision and fuse failure supervision.
• Control describes control functions, for example, synchronization and energizing
check and other product specific functions.
• Scheme communication describes functions related to current reversal and weak
end infeed logic.
• Logic describes trip logic and related functions.
• Monitoring describes measurement related functions that are used to provide data
regarding relevant quantities, events and faults, for example.
• Metering describes pulse counter logic.
• Station communication describes Ethernet based communication in general,
including the use of IEC 61850 and horizontal communication via GOOSE.
• Remote communication describes binary and analog signal transfer, and the
associated hardware.
• Hardware describes the IED and its components.
• Connection diagrams provides terminal wiring diagrams and information
regarding connections to and from the IED.
• Inverse time characteristics describes and explains inverse time delay, inverse
time curves and their effects.
• Glossary is a list of terms, acronyms and abbreviations used in ABB technical
documentation.
1.1.3 This manual
The description of each IED related function follows the same structure (where
applicable). The different sections are outlined below.
1.1.3.1 Introduction
Outlines the implementation of a particular protection function.
1.1.3.2 Principle of operation
Describes how the function works, presents a general background to algorithms and
measurement techniques. Logic diagrams are used to illustrate functionality.
Logic diagrams
Logic diagrams describe the signal logic inside the function block and are bordered by
dashed lines.
1MRK505222-UUS C Section 1
Introduction
37
Technical reference manual
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