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Havai Hat

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Transformer Column Cable, Grounding Conductor Selection - Underground Cable Selection  
         
         
   Transformer Power(kVA):    

                 Impedance             Cu 56  Al 35 

   
Cos φ =       φ = 30,68 Cable Laying in Earth Channel:    xlpe pvc
Secondary Voltage:    Cable Temp. Derating Factor(K1):  0,82  0,71
Short Circuit Impedance%: Earth Temp Derating Factor(K2):  0,93  0,89
Ambient Temperature(k1): Nature of Soil Derating Factor(K3):  1  
Soil Temperature(k2): Earth Laying Depth Rating Factor(K4):  1,05  
Nature of Soil(k3):      
Laying Depth(k4): Underground Cable Output Power(kW):     A  
Secondary Rated Current(A):  2309,4 Cable Length(m):    
Secondary Short Circuit Current(A):  38.490,00 Number of Circuits(Number):    
Number of Column Cables for Each Phase(Number):      Copper Aluminium
Neutral Grounding Cable Cross Section:   Selected Cross-Section(XLPE):   ( )   ( )
Copper  (mm2):  189 mm2 ;Selected Cable :240 mm2 Δu.akt  0  0
Aluminium  (mm2):  290 mm2 u.akt  0  0
Steel  (mm2):  523 mm2 Δu.r  0  0
    u.r   0  0
    Transformer Column Cable  

%et

 0  0

             PVC: Copper             Aluminium

     XLPE Copper      Aluminium      
 9x(1X240 )

 11x(1X240 )

   6x(1X240 )

 8x(1X240 )

     
 321        

**Aluminum grounding conductor can be laid inside the building. It cannot be laid in the ground.

   

**In our facilities, instead of copper material in column cables and grounding conductors, Aluminum can be used as column cable and braided steel wire can be used as grounding conductor.

*** The cross-section of the neutral conductor at a distance of 20 m from the protective grounding has been calculated.

****TIn our facilities, the cross-section of the protection grounding may be equal to or larger than the neutral grounding conductor cross-section. Click for detailed calculations.