Date Code 20010719 701 Motor Protection Relay
Introduction & Specifications
Introduction
1.1
Section 1
Introduction & Specifications
Introduction
The SEL-701 Motor Protection Relay is designed to protect three-phase, medium
voltage motors. The basic relay provides locked rotor, overload, unbalance, and short-
circuit protection functions. You can select options that add voltage-based and RTD-
based protection and monitoring capabilities. All relay models offer innovative
monitoring functions, such as:
Motor Start Reports and Motor Start Trend Data.
Load Profiling.
Motor Operating Statistics.
Event Reports and Summaries
and a Sequential Events Record (SER).
Complete Suite of Accurate Metering Functions.
This manual contains the information you need to select, install, set, test, operate,
and maintain any SEL-701 Relay. You probably will not need to review the whole book
to perform the specific tasks that are your responsibility. The following is an overview
of the sections in this instruction manual:
Section 1: Introduction & Specifications. Describes how to locate information in this
instruction manual; describes the basic features and functions of the
SEL-701 Relay; shows how to create an SEL-701 Relay part number;
lists the SEL-701 Relay specifications.
Section 2: Installation. Describes how to mount and wire the SEL-701 Relay;
illustrates wiring connections for various applications.
Section 3: SEL-701PC Software. Describes setup, features, and use of the
SEL-701PC software.
Section 4: Settings Calculation. Describes how to calculate and record settings for
basic motor protection, RTD-based protection functions, and voltage-
based functions.
Section 5: Front-Panel Operation. Explains the features and use of the SEL-701
Relay front panel, including front-panel command menu, default
displays, and automatic messages.
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