Date Code 20010518 Maintenance i
SEL-2020 Instruction Manual
TABLE OF CONTENTS
SECTION 10: MAINTENANCE 10-1
Introduction.................................................................................................................................10-1
Calibration...................................................................................................................................10-1
Battery Replacement ...................................................................................................................10-1
Alarm Conditions........................................................................................................................10-2
Self-Tests ....................................................................................................................................10-3
Troubleshooting ..........................................................................................................................10-3
Power System Problems......................................................................................................10-3
Communications Problems..................................................................................................10-3
SEL-2020 Firmware Upgrades....................................................................................................10-4
Relay Firmware Upgrades...........................................................................................................10-5
Factory Assistance ......................................................................................................................10-5
TABLES
Table 10.1: Alarm Conditions.................................................................................................................10-2
Table 10.2: Power System Problems ......................................................................................................10-3
Table 10.3: Communications Problems ..................................................................................................10-4
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