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Fuse selection - L-L faults

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NickParker

Electrical
Joined
Sep 1, 2017
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455
Location
NL
Is it okay to consider only L-L faults for fuse selection as it produces the minimum fault. Any possibility of L-G or L-L-L getting lower than L-L faults?
 
L-G fault current is limited using NGRs, in medium voltage systems.
In case of low voltage systems, even a small impedance in the earth return path, can cause L-G fault currents to drastically reduce.
 
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