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10. INSTALLATION AND
MAINTENANCE
11. MII FAMILY FAQ
(FREQUENTLY ASKED
QUESTIONS)
12. MIFII DO'S AND DON'TS
13. TROUBLESHOOTING
GUIDE
A. THERMAL IMAGE UNIT
B. TIME-CURRENT CURVES
FOR 51P AND 51N UNITS
C. MODBUS
GEK-106237P
TABLE OF CONTENTS
10.1 INSTALLATION
10.2 GROUND CONNECTION AND DISTURBANCES SUPPRESSION
10.3 MAINTENANCE
10.4 CLEANING INSTRUCTIONS
11.1 MIFII FAQ
12.1 DO'S
12.2 DON'TS
13.1 MIFII TROUBLESHOOTING GUIDE
A.1 INTRODUCTION
A.2 OPERATING PRINCIPLE
A.3 ALGORITHMS
A.4 DIGITAL TECHNOLOGY AND THERMAL IMAGE RELAYS
A.5 THERMAL CURVE
A.6 MIFII THERMAL CURVES
B.1 IEC/BS142 CURVES
B.2 ANSI CURVES
B.3 IAC CURVES
C.1 MODBUS FORMAT
C.2 READING VALUES
C.3 COMMAND EXECUTION
C.4 SYNCHRONIZATION
C.5 WRITING SETTINGS
C.5.1
FRAME STRUCTURE .......................................................................................C-8
C.6 ERRORS
C.7 MODBUS MAP - SETTINGS
C.8 MODBUS MAP- STATUS
MIFII Digital Feeder Relay
5
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