P341/EN O/B11 Operation Guide
CHAPTER 3 Commissioning and
Page 2/80 Maintenance
MiCOM P341
5. SETTING CHECKS 18
5.1 Apply application-specific settings 18
5.2 Check application-specific settings 18
5.3 Demonstrate correct relay operation 19
5.3.1 Connect the test circuit 19
5.3.2 Perform the test 20
5.3.3 Check the operating time 20
6. ON-LOAD CHECKS 20
6.1 Voltage connections 21
6.2 Current connections 21
7. FINAL CHECKS 22
8. MAINTENANCE 23
8.1 Maintenance period 23
8.2 Maintenance checks 23
8.2.1 Alarms 23
8.2.2 Opto-isolators 23
8.2.3 Output relays 23
8.2.4 Measurement accuracy 24
8.3 Method of repair 24
8.3.1 Replacing the complete relay 24
8.3.2 Replacing a PCB 26
8.3.2.1 Replacement of the main processor board 28
8.3.2.2 Replacement of the IRIG-B board 29
8.3.2.3 Replacement of the input module 30
8.3.2.4 Replacement of the power supply board 32
8.3.2.5 Replacement of the relay board in the power supply module 33
8.4 Recalibration 33
8.5 Changing the battery 34
8.5.1 Instructions for replacing the battery 34
8.5.2 Post modification tests 34
8.5.3 Battery disposal 34
8.6 Cleaning 34
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