Schweitzer Engineering Laboratories SEL-352-1 - SECTION 6: METERING AND MONITORING

Date Code 20010731 Metering and Monitoring i
SEL-352-1, -2 Instruction Manual
TABLE OF CONTENTS
SECTION 6: METERING AND MONITORING................................... 6-1
Introduction .................................................................................................................................. 6-1
Metering ....................................................................................................................................... 6-1
Metering Calculations .......................................................................................................... 6-1
Breaker Monitor ........................................................................................................................... 6-2
Header................................................................................................................................... 6-3
Breaker Operations............................................................................................................... 6-3
Date and Time............................................................................................................... 6-4
Operation ...................................................................................................................... 6-4
Electrical Operate Time................................................................................................ 6-4
Mechanical Operate Time............................................................................................. 6-4
Energy........................................................................................................................... 6-4
Current .......................................................................................................................... 6-4
Operation Summary.............................................................................................................. 6-5
Number of Operations .................................................................................................. 6-5
Average Operation Times............................................................................................. 6-5
Last Operation Times ................................................................................................... 6-5
Total Energy ................................................................................................................. 6-5
Total Current................................................................................................................. 6-5
Percent Wear (SEL-352-2 Relay)................................................................................. 6-5
Breaker Alarms..................................................................................................................... 6-7
Selecting Alarms........................................................................................................... 6-7
Total Count ................................................................................................................... 6-7
Clearing the Breaker Monitor Report................................................................................... 6-8
Preloading the Breaker Monitor Report (SEL 352-2 Relay)................................................ 6-8
Breaker Resistor Thermal Monitor .............................................................................................. 6-8
Resetting the Thermal Monitor ............................................................................................ 6-8
Status Monitor .............................................................................................................................. 6-8
Channel Offset...................................................................................................................... 6-9
Master Offset ........................................................................................................................ 6-9
Power Supply........................................................................................................................ 6-9
Temperature.......................................................................................................................... 6-9
RAM ..................................................................................................................................... 6-9
Flash ROM ........................................................................................................................... 6-9
Analog-to-Digital Converter ................................................................................................ 6-9
Critical RAM ...................................................................................................................... 6-10
EEPROM ............................................................................................................................ 6-10
I/O Boards........................................................................................................................... 6-10
Self-Testing Alarms............................................................................................................ 6-11
Warnings..................................................................................................................... 6-11
Failures ....................................................................................................................... 6-11