250 kW to Amps at 400V Three-Phase AC (IEC Europe)
Exact current (Amps), real power (kW), apparent power (kVA), mechanical horsepower (HP), breaker rating, and conductor size for 250 kW on a 400V Three-Phase AC (IEC Europe) circuit.
Line Current (0.85 PF)424.52 AAt 1.0 PF: 360.84 A
Active / Apparent Power250.0 kW294.12 kVA · 154.94 kVAR
Recommended Breaker600 A (NEC)450 A (IEC Nominal)
Recommended Copper Wire750 kcmilIEC Metric: 300 mm²
Engineering Breakdown for 250 kW at 400V
| Input Rating | 250 kW (400V Three-Phase AC (IEC Europe)) |
| Amperage at 0.85 Power Factor (Industrial Motor/Transformer) | 424.52 Amps |
| Amperage at 1.00 Power Factor (Resistive Load) | 360.84 Amps |
| Real Power (kW / Watts) | 250.0 kW (250,000 W) |
| Apparent Power (kVA) & Reactive Power (kVAR) | 294.12 kVA / 154.94 kVAR |
| Equivalent Mechanical Horsepower (HP) | 335.26 HP |
| NEC 125% Continuous Circuit Breaker | 600 A |
| Minimum Copper Conductor (100 ft / 30 m, ≤3% Drop) | 750 kcmil (NEC) / 300 mm² (IEC) |
Frequently Asked Questions
How many amps is 250 kW at 400V (3-Phase)?
At 400V Three-Phase AC (IEC Europe), 250 kW equals 424.52 Amps at an industrial power factor of 0.85 (or 360.84 Amps at unity power factor 1.0).
What size breaker and wire is needed for 250 kW at 400V?
For 424.52A continuous load, NEC requires a 125% rated breaker of 600A with 750 kcmil copper conductors, while IEC standard sizing uses a 450A breaker with 300 mm² copper cable.
Other Power Ratings & Voltages
5 kW at 400V (3P)10 kW at 400V (3P)15 kW at 400V (3P)20 kW at 400V (3P)25 kW at 400V (3P)30 kW at 400V (3P)45 kW at 400V (3P)50 kW at 400V (3P)75 kW at 400V (3P)100 kW at 400V (3P)150 kW at 400V (3P)200 kW at 400V (3P)500 kW at 400V (3P)250 kW at 120V Single-Phase AC250 kW at 208V Single-Phase AC250 kW at 230V Single-Phase AC (IEC)250 kW at 240V Single-Phase AC (NEC)250 kW at 208V Three-Phase AC250 kW at 230V Three-Phase AC250 kW at 415V Three-Phase AC (UK / AU)250 kW at 480V Three-Phase AC (US Industrial)250 kW at 600V Three-Phase AC (Canada / Heavy)250 kW at 24V DC Direct Current250 kW at 48V DC Battery / Telecom Bus