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Schweitzer Engineering Laboratories SEL-352-1 User Manual

Schweitzer Engineering Laboratories SEL-352-1
444 pages
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SEL-352-1, -2
BREAKER FAILURE RELAY
CONTROL RELAY
DATA RECORDER
INSTRUCTION MANUAL
SCHWEITZER ENGINEERING LABORATORIES
2350 NE HOPKINS COURT
PULLMAN, WA USA 99163-5603
TEL: (509) 332-1890 FAX: (509) 332-7990

Table of Contents

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Schweitzer Engineering Laboratories SEL-352-1 Specifications

General IconGeneral
Frequency Range50/60 Hz
Current Input Range0–5 A
Operating Temperature-40°C to +85°C
Communication ProtocolsDNP3, Modbus, IEC 61850
Protection FunctionsOvercurrent, Frequency
MeteringVoltage, Current, Power, Energy, Frequency
Standards ComplianceIEC 60255, IEEE C37.90
Event ReportingTime-stamped event recording

Summary

SECTION 1: INTRODUCTION AND SPECIFICATIONS

General Specifications

Lists the technical specifications, including environmental, electrical, and physical characteristics of the relay.

Relay Element Specifications

Provides detailed technical specifications for each protection and control element within the relay.

SECTION 2: INSTALLATION

Relay Mounting

Explains how to mount the SEL-352 relay in rack or panel configurations, including dimensions.

Rear-Panel Connections

Details the terminal block and connectorized connection options for wiring the relay.

SECTION 3: BREAKER LOGIC

Breaker Failure Relaying Overview

Explains the purpose and application of breaker failure relaying as a form of local backup protection.

Fault Current Conditions

Discusses the five protection schemes for detecting breaker failure during fault current conditions.

SECTION 4: CLOSE LOGIC

Controlled Closing

Explains the two schemes for reducing system transients during breaker closing operations.

Retripping

Describes the two schemes for retripping a breaker to clear faults or improve reliability.

Lockout Relay Control

Explains how the relay controls lockout relays for breaker failure scenarios, including MOD tripping.

SECTION 5: CONTROL LOGIC

Relay Word Bits and SELOGIC® Control Equations

Explains Relay Word bits and how SELOGIC® control equations are used to define relay logic.

SECTION 6: METERING AND MONITORING

Breaker Monitor

Details the breaker monitor functions, including operate times, energy, wear, and alarms.

Breaker Alarms

Describes how to select and interpret breaker alarm conditions reported by the relay.

SECTION 7: SETTING THE RELAY

Settings Changes via the Front Panel

Explains how to modify relay settings using the front-panel SET pushbutton.

Settings Changes via the Serial Port

Details how to change relay settings using SET commands via a serial port connection.

SECTION 8: SERIAL PORT COMMUNICATIONS AND COMMANDS

Command Definitions

Provides a detailed alphabetical list and description of the ASCII commands available for relay operation and configuration.

SECTION 9: FRONT-PANEL INTERFACE

SECTION 10: EVENT REPORTS AND SER

SECTION 11: TESTING AND TROUBLESHOOTING

Full Functional Test

Describes comprehensive tests to ensure relay settings match the application and verify performance.

Fault Current Breaker Failure, Scheme 1 Logic Test

Provides specific steps to verify the operation of the Scheme 1 fault current breaker failure logic.

Troubleshooting

Offers guidance on identifying and resolving common issues with the relay's operation and front-panel interface.

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