International Electrotechnical Commission <br/><br/>
IEC/TR: 60909-1(Ed-2)-2002-07; Short-circuit currents in three-phase a.c. systems- Part 1: factors for the calculation of short-circuit currents according to IEC 60909-0 

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 - Geneva  International Electrotechnical Commission  2002 
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<br/><br/> Downloaded from the IEC website 
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