2 What is an fault arc - Die BG ETEM

Annex 1
The application of the calculation procedure is demonstrated in 8.5.
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Maximum values Guide values
R/X kPmax system kP validity range
< 0.1 0.45 For d ≤ 40 mm with equip-
0.1 0.43 L.V. 0.22…0.27 ment near to transformer;
0.2 0.38 (≤ 1000 V) For d ≤ 70 mm with
0.5 0.33 equipment near to end-use
1.0 0.29
2.0 0.26 M.V. 0.04…0.10
≥ 0.2 0.25 (> 1000 V)
Tab. A1.1: Maximum and guide values of the normalized arc power