Diesel Generator sizing and calculation

 • Diesel Generator :

  Diesel Generator is selected by the client requirement like 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% of the transformer.

   In residential and commercial building we use 30 -- 60 % of the transformer.

• For example :

If we have 160 kVA transformer for commercial building. Then, we select of it 40 %.

Therefore, 160 × 0.4 = 64 kVA.

• Generator Rating :

    15 kVA

    20 kVA

    25 kVA

    30 KVA

    50 KVA

    75 KVA

    85 KVA

    100 KVA

    125 KVA

    140 KVA

    180 kVA

    200 kVA

    250 kVA

    500 kVA

    600 KVA

    750 KVA

    825 KVA

    1010 KVA

    1250 kVA

    1500 kVA

    1650 kVA

    1875 kVA

    2000 kVA

Therefore, 64 kVA we get,

                     

                   75 KVA, DG is recommended.

• For example :

     If we have 500 kVA transformer for industries. We use 80% DG as per client.

         500 kVA × 0.8 = 400 kVA

Therefore, for 400 kVA we should take 500 kVA D.G.