Schweitzer Engineering Laboratories SEL-321 - Table of Contents

Date Code 20011026 Introduction i
SEL-321/321-1 Instruction Manual
TABLE OF CONTENTS
SECTION 1: INTRODUCTION .................................................................1-1
Getting Started..............................................................................................................................1-1
Overview.......................................................................................................................................1-1
Event Reporting ....................................................................................................................1-5
Applications Highlights ........................................................................................................1-6
Other Features.......................................................................................................................1-7
Electronic-Level Input Option ..............................................................................................1-7
Maximum Continuous Rating .......................................................................................1-8
Relay Test System (RTS)..............................................................................................1-8
FIGURES
Figure 1.1: SEL-321 Front Panel (One I/O Board Version) ................................................................... 1-2
Figure 1.2: SEL-321 Rear Panel (One I/O Board Version, showing conventional terminal
blocks – other options are available)..............................................................................1-2
Figure 1.3: SEL-321 Rear Panel (Two I/O Board Version, showing plug-in connectors option -
other options are available)............................................................................................1-3
Figure 1.4: Three-Phase and Phase-Phase Distance Characteristics.......................................................1-3
Figure 1.5: Ground Distance Characteristics ..........................................................................................1-4
Figure 1.6: Instantaneous, Definite-Time, and Time-Overcurrent Characteristics.................................1-4
Figure 1.7: SELOGIC
®
Control Equations Programmable Control Logic ...............................................1-5
Figure 1.8: SEL-5601 Analytic Assistant ...............................................................................................1-5