Schweitzer Engineering Laboratories SEL-387E - Table of Contents

Date Code 20080110 Introduction and Specifications i
SEL-387E Instruction Manual
TABLE OF CONTENTS
SECTION 1: INTRODUCTION AND SPECIFICATIONS......................1-1
Introduction...................................................................................................................................1-1
Instruction Manual Overview.......................................................................................................1-1
Relay Functions ............................................................................................................................1-2
Current Differential Protection .............................................................................................1-2
Restricted Earth Fault Protection..........................................................................................1-3
Overcurrent Protection..........................................................................................................1-3
Volts-per-Hertz Protection....................................................................................................1-3
Overvoltage and Undervoltage Protection............................................................................1-3
Frequency Protection ............................................................................................................1-4
Through-Fault Event Monitor...............................................................................................1-4
Programmable Optoisolated Inputs and Output Contacts ....................................................1-4
Model Options ..............................................................................................................................1-4
Conventional Terminal Blocks .............................................................................................1-4
Plug-In Connectors (Connectorized
®
)...................................................................................1-4
Specifications................................................................................................................................1-5
General..................................................................................................................................1-5
Metering Accuracy ...............................................................................................................1-8
Station DC Battery Monitor..................................................................................................1-8
Differential Element .............................................................................................................1-8
Harmonic Element ................................................................................................................1-9
Instantaneous/Definite-Time Overcurrent Elements (Winding) ..........................................1-9
Time Overcurrent Elements (Winding and Combined Current) ..........................................1-9
Over-/Undervoltage Elements ............................................................................................1-10
Frequency Element .............................................................................................................1-10
Volts/Hertz Element ...........................................................................................................1-10
FIGURES
Figure 1.1: SEL-387E Relay Functional Overview ................................................................................1-2