12th November 2019

powerstream
12

Is KVA equal to KW?

The ratio between the VA (i.e. rms volts time rms amps) and Watts is called the power factor PF. In other words, volt-amps x power factor = watts. Similarly, KVA*PF = KW, Or kilovolt-amps times power factor equals kilowatts.

How many amps is a 50 kva transformer good for?

1000 kva divided by 240v secondary equals 4.2 amps which is the only number you need for single phase transformers.
Take any single phase KVA transformer and multiply the KVA times 4.2.
25KVA X 4.2 - 104 amps.
50KVA X 4.2 = 208 amps.

How do you compute KVA?

Calculation with line to line voltage
  1. S(kVA) = √3 × I(A) × VL-L(V) / 1000.
  2. So kilovolt-amps are equal to √3 times amps times volts divided by 1000.
  3. kilovolt-amps = √3 × amps × volts / 1000.
  4. kVA = √3 × A ⋅ V / 1000.
  5. S = √3 × 12A × 190V / 1000 = 3.949kVA.
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