P54x/EN FD/La4 Firmware Design
(FD) 9-2
MiCOM P543, P544, P545 & P546
FD
3.3.2 Settings database 15
3.3.3 Database interface 15
3.4 Protection and control software 15
3.4.1 Overview - protection and control scheduling 16
3.4.2 Signal processing 16
3.4.3 Main protection digital filtering 16
3.4.3.1 Differential protection 16
3.4.3.2 Distance protection 17
3.4.3.3 Fourier filtering 17
3.4.4 Programmable scheme logic 17
3.4.4.1 PSL data - attaching a text identifier for version traceability 18
3.4.5 Event recording 18
3.4.6 Disturbance recorder 18
3.4.7 Fault locator 18
4. SELF TESTING & DIAGNOSTICS 19
4.1 Start-up self-testing 19
4.1.1 System boot 19
4.1.2 Initialization software 19
4.1.3 Platform software initialization & monitoring 20
4.2 Continuous self-testing 20
FIGURES
Figure 1:
Relay modules and information flow 4
Figure 2:
Main input board 7
Figure 3:
High break contact operation 10
Figure 4:
Second rear comms board (optional) 12
Figure 5:
Ethernet board (optional) 13
Figure 6:
Relay software structure 14
Figure 7:
Frequency response of filters 17
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