Date Code 20151029 SEL-411L Relay
Preface
Overview
This manual provides information and instructions for installing and operating
the relay. This manual is for use by power engineers and others experienced in
protective relaying applications. Included are detailed technical descriptions
of the relay and application examples. While this manual gives reasonable
examples and illustrations of relay uses, you must exercise sound judgment at
all times when applying the relay in a power system.
The SEL-411L Relay Manual consists of two volumes:
➤ Protection Manual
➤ Communications Manual
The manual contains a comprehensive index that encompasses the entire
manual. The index appears at the end of each printed volume. In the electronic
version of the manual, the index appears once; hyperlinks take you to material
referenced in the index. Also included is a glossary that lists and defines
technical terms used throughout the manual.
An overview of each manual section follows.
Protection Manual
Preface. Describes manual organization and conventions used to present
information (appears once in the electronic form of the manual;
repeated in each printed volume).
Section 1: Introduction and Specifications. Introduces the relay features;
summarizes relay functions and applications; lists relay specifications,
type tests, and ratings.
Section 2: Installation. Discusses the ordering configurations and interface
features (control inputs, control outputs, and analog inputs, for
example); provides information about how to design a new physical
installation and secure the relay in a panel or rack; details how to set
relay board jumpers and make proper rear-panel connections
(including wiring to CTs, PTs, and a GPS receiver); explains basic
connections for the relay communications ports.
Section 3: Protection Functions. Describes the function of various relay
protection elements; describes how the relay processes these elements;
gives detailed specifics on protection scheme logic for POTT, DCB,
DCUB, and DTT; provides trip logic diagrams, and current and
voltage source selection details. Also describes basic 87L
communications channel options and configuration parameters.
Section 4: Autoreclosing and Synchronism-Check. Explains how to
operate the two-circuit breaker multi-shot recloser; describes how to
set the relay for single-pole reclosing, three-pole reclosing, or both;
shows selection of the lead and follow circuit breakers; explains how
to set and apply synchronism-check elements for automatic and
manual closing.
NOTE: In the -0, -1 versions of the
relay, the LED alias settings (TnLEDA)
are no longer supported. Their
equivalent functionality is available
by aliasing the Tn_LED_n bits using
SET T. The only difference is that the
TnLEDA alias settings accept eight
character aliases, whereas aliases set
using the SET T command only accept
seven characters.
For SEL-5030 mapping purposes,
take any assigned TnLEDA settings
and create alias settings for the
corresponding TLED_n bits. The
aliases will need to be truncated to
seven characters.
To Next Page
Loading...
