ERL 8700/BUS, User Manual

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Appendix K Bus Differential Function Setting Examples
D01908R02.12 B-PRO User Manual 8700 Appendix K-3
Settings Method The clearest way to understand the proposed bus differential settings method
is through a specific example. Figure 3 illustrates normal load conditions.
Figure K.4: Bus transfer load
Settings are developed using simple steps:
1. Enter Winding/CT connection information
2. Determine the maximum bus transfer current
3. Choose a value for IRs
4. Calculate the Bus Base MVA
5. Determine the CT Saturation Block Timer
6. Enter settings in the B-PRO
1. Enter Winding/CT Connection Information
Enter Winding and CT connection information to match the specific bus pro-
tection application, as in the example of Figure 4.
Figure K.5: Winding/CT Connections Settings
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