pplication Notes
P74x/EN AP/N
1, P742, P743 (AP) 6-
An Excel spreadsheet tool called “Idiff_Ibias“ is available on request to assure a reliable
setting choice:
2.1.1.1.1 Sub-station features
Only 6 values have to be known:
1. Minimum load current in a feeder
2. Maximum load current in a feeder
3. Maximum load current in a bus
4. Biggest CT primary winding
5. Minimum short-circuit value (phase to phase) in a bus
6. Number of independent bars
2.1.1.1.2 “Idiff_Ibias” Setting calculation spreadsheet
Enter in the Idiff_Ibias spreadsheet the 5 values here above listed and you’ll be able to
choose the 7 values hereafter listed.
To Next Page
Loading...
