ELECTRO-AREA
CABLE CALCULATOR ONLINE : SHORT-CIRCUIT CURRENT END-LINE
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Calculation of  stready state short-circuit current in low voltage line according to IEC 60909-0

This sheet allows the online calculation of three-phase short-circuit current Icc low voltage three-phase , double-phase and Icc single-phase between phase and neutral or protection conductor at the and of the line, known the supply voltage, the short circuit to start line Icc0 , and power factor cosfi0,the type of low-voltage cable used, the current carrying capacity Iz and the conductor material used (copper (cu) or aluminum (al)) and the length of the line, according to IEC 60909-0.
Intermediate results of calculations: let-trough energy cable ,  loop resistance, reactance, and impedance of the line.
 
N.b.: use the decimal point for numbers, do not use the comma!.
 



                              Phase-to-phase voltage(volt):                                



         Short-circuit current at start line ICC0 (KA):               CofiICC0:  
 

                 in general for                       ICC0  = <  5KA              =>     Cofi ICC0: 0.7
                                               5KA  < ICC0  = <  10KA            =>    Cofi ICC0: 0.5
                                             10KA  < ICC0  = <  20KA            =>     Cofi ICC0: 0.3
                                             20KA  < ICC0                               =>     Cofi ICC0: 0.2



                                                  Voltage factor C:                                 




                                                      type of cable:   


                                                            isolation:    



      Short circuit final conductors temperature(°C):                                     



                          PHASE: cable C.section(mmq):       numer of cables:     conductor type: 

 NEUTRAL/PROTECTION:cross-section(mmq):     numer of cables::


                                                  Line length (m.):    




RESULTS OF CALCULATION OF THE IMPEDANCE OF THE CABLE LOOP FAULT AND MINIMUM OR MAXIMUM SHORT-CIRCUIT CURRENT, LOW VOLTAGE



                                                     Let-Through Energy of the cable line  =  0
                                   
                                                                    Line impedance Zl (mOhm)  = 

                                                                      Line resistance Rl(mOhm)  = 

                                                                      Line reactance Xl(mOhm)  = 



                         ( Minimum or max.) three-phase short-circuit  at end line  ICC 3F (KA)  = 

                         ( Minimum or max. )phase-phase short-circuit  at end line ICC F-F (KA)  = 

(Minimum or max ) phase-protection/neutral short-circuit  at end line  ICCF-N/PE (KA)   = 
                 
              

                   


 When Icc is calculate with C=1,05 instead of C=0,95 and the short circuit final temperature assumes =20 °C  instead of 160°C-250°C, results change and ( minimum )Icc  became ( maximum ) Icc at end line .
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