Schweitzer Engineering Laboratories SEL-352-1 - Table of Contents

Date Code 20010731 Introduction and Specifications i
SEL-352-1, -2 Instruction Manual
TABLE OF CONTENTS
SECTION 1: INTRODUCTION AND SPECIFICATIONS.................... 1-1
Introduction .................................................................................................................................. 1-1
Instruction Manual Overview....................................................................................................... 1-1
Relay Functions ............................................................................................................................ 1-3
Breaker Failure Detection..................................................................................................... 1-3
Control Features.................................................................................................................... 1-4
Data Recording ..................................................................................................................... 1-4
Additional Features............................................................................................................... 1-4
Model Options.............................................................................................................................. 1-5
SEL-352-1 Relay .................................................................................................................. 1-5
SEL-352-2 Relay .................................................................................................................. 1-5
Conventional Terminal Blocks ............................................................................................. 1-5
Plug-In Connectors (Connectorized
®
)................................................................................... 1-5
Interface Boards.................................................................................................................... 1-6
Signal Processing Specifications .................................................................................................. 1-6
General Specifications.................................................................................................................. 1-7
Relay Element Specifications..................................................................................................... 1-10
Overcurrent Elements ......................................................................................................... 1-10
Pickup/Dropout Curves....................................................................................................... 1-11
Voltage Elements................................................................................................................1-13
Synchronism Check Element.............................................................................................. 1-13
Current Unbalance Element................................................................................................ 1-14
Overpower Elements........................................................................................................... 1-14
Breaker Resistor Thermal Elements ................................................................................... 1-14
Settable Timers ................................................................................................................... 1-14
Fixed Timers....................................................................................................................... 1-15
Internal Logic Timers ......................................................................................................... 1-15
Metering.............................................................................................................................. 1-16
Multiple Setting Groups...................................................................................................... 1-16
Data Recording Specifications ...................................................................................................1-16
Event Records..................................................................................................................... 1-16
Breaker Monitor Reporting................................................................................................. 1-16
Serial Port Specifications............................................................................................................ 1-17
FIGURES
Figure 1.1: Single-Phase Diagram of AC Inputs to the Relay ................................................................ 1-1
Figure 1.2: Functional Overview ............................................................................................................ 1-3
Figure 1.3: Analog Filter Curve.............................................................................................................. 1-6
Figure 1.4: 50FT Pickup Curves........................................................................................................... 1-11
Figure 1.5: 50FT Dropout Curves......................................................................................................... 1-11
Figure 1.6: 50MN, 50LD, 50MD, 50N Pickup Curves......................................................................... 1-12
Figure 1.7: 50MN, 50LD, 50MD, 50N Dropout Curves ...................................................................... 1-12