How to calculate r2 from zs?
1 Answer(s) Available
Answer # 1 #
- Get to know the voltage to earth (Uo)
- Determine Ia, see the breaker tripping curve, to find the cuurent needed to trip in 5 seconds (see example on the attached file “Earth Fault Loop Impedance Summary.ppt”, slide 2 and 3)
- Calculate Zs = Uo / Ia.
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