Alstom MiCOM P54 Series

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Maintenance P54x/EN MT/La4

MiCOM P543, P544, P545 & P546

(MT) 11-1

CONTENTS

(MT) 11-

1. MAINTENANCE 3

1.1 Maintenance period 3

1.2 Maintenance checks 3

1.2.1 Alarms 3

1.2.2 Opto-isolators 3

1.2.3 Output relays 3

1.3 Method of repair 4

1.3.1 P54x relay 4

1.3.1.1 Replacing the complete relay 4

1.3.1.2 Replacing a PCB 5

1.4 Re-calibration 5

1.4.1 P54x relay 5

1.5 Changing the relay battery 5

1.5.1 Instructions for replacing the battery 5

1.5.2 Post modification tests 6

1.5.3 Battery disposal 6

1.6 Cleaning 6

Alstom MiCOM P54 Series - Page 875