Technical Specification for 25KVA Distribution Transformer

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Technical Specifications for 11/0.433 KV    Distribution Transformer



25 KVA T/F


     1)   Nominal System voltage : 11KV
     2)   Highest System Voltage : 12KV 
     3)   Nominal Primary Voltage :11KV
     4)   Nominal Secondary Voltage :433V
     5)   HV side Line current (Amps) : 1.312 A
     6)   LV side Line current (Amps) : 33.33 A
     7)   HV Winding :  Delta   
     8)   LV Winding : Star  
     9)   Vector Group : Dyn 11
    10)   Neutral Earthing : Solidly Earthed
    11)    Frequency: 50Hz ± 3%Tolerance.
    12)    Transformer OIL in Litres: 100 Lts.
     13)     Rated Short Circuit Level: 13.1 KA /3Sec.
     14)    Percentage Impedance : 4.5%








·        Electrical Clearance :
Clearance between Winding and Body of Tank should be less than 30mm.

·        Minimum External Clearance between Bushing Terminals


Voltage

 Clearance between

 Clearance in (mm)

HV

Ph-Ph

        255mm


            Ph-E

        140mm

              LV

             Ph-Ph

         75mm


             Ph-E

          40mm


 

63 KVA T/F



100 KVA T/F
























Different KVA Ratings of Distribution transformer 16,25,63,100,160,200,250 315,400,500,630,800,1000 KVA


      KVA
   VOLTAGE
   HV AMPS
    LV AMPS
    16 KVA
   11/0.433 KV
     0.89 A
   21.33 A
     25 KVA
   11/0.433 KV
     1.31 A
   84.00 A
     63 KVA
    11/0.433 KV
     3.30 A
   33.33 A
     100 KVA
    11/0.433 KV
     5.24 A
   133.34 A
     160 KVA
    11/0.433 KV
     8.39 A
   213.34 A
     200 KVA
    11/0.433 KV
     10.49 A
   266.68 A
     250 KVA
    11/0.433 KV
     13.12 A
   333.35 A
     315 KVA
    11/0.433 KV
     20.99 A
   420.02 A
     400 KVA
    11/0.433 KV
     16.53 A
   533.36 A
     500 KVA
    11/0.433 KV
     26.24 A
   666.70 A
     630 KVA
    11/0.433 KV
     33.06 A
   840.04 A
     800 KVA
    11/0.433 KV
     41.99 A
   1066.72 A
     1000 KVA
    11/0.433 KV
     52.48 A
   1333.41 A





 

315 KVA T/F






 



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