How much Active Power can a Transformer Deliver Based on its kVA Rating?
This post provides an easy estimation of a transformer’s active power (kW) based on its apparent power rating. Assuming a typical power factor of 0.8, the active power may be calculated using the formula:
Active power (kW) = Apparent power (kVA) x 0.8
This easy method enables engineers & electricians to evaluate a transformer’s useful power output for wide range of applications without doing complex calculations.
| Transformer Rating (kVA) | Power Factor (pf) | Motor Power (kW) |
|---|---|---|
| 75 kVA | 0.8 | 60 kW |
| 93.8 kVA | 0.8 | 75 kW |
| 100 kVA | 0.8 | 80 kW |
| 125 kVA | 0.8 | 100 kW |
| 156 kVA | 0.8 | 125 kW |
| 187 kVA | 0.8 | 150 kW |
| 219 kVA | 0.8 | 175 kW |
| 250 kVA | 0.8 | 200 kW |
| 312 kVA | 0.8 | 250 kW |
| 375 kVA | 0.8 | 300 kW |
| 438 kVA | 0.8 | 350 kW |
| 500 kVA | 0.8 | 400 kW |
| 625 kVA | 0.8 | 500 kW |
| 750 kVA | 0.8 | 600 kW |
| 875 kVA | 0.8 | 700 kW |
| 1,000 kVA | 0.8 | 800 kW |
| 1,125 kVA | 0.8 | 900 kW |
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