300 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 300 kW on a 400V Three-Phase AC (IEC Europe) circuit.
Line Current (0.85 PF)509.43 AAt 1.0 PF: 433.01 A
Active / Apparent Power300.0 kW352.94 kVA · 185.92 kVAR
Recommended Breaker700 A (NEC)600 A (IEC Nominal)
Recommended Copper Wire1000 kcmilIEC Metric: 400 mm²
Engineering Breakdown for 300 kW at 400V
| Input Rating | 300 kW (400V Three-Phase AC (IEC Europe)) |
| Amperage at 0.85 Power Factor (Industrial Motor/Transformer) | 509.43 Amps |
| Amperage at 1.00 Power Factor (Resistive Load) | 433.01 Amps |
| Real Power (kW / Watts) | 300.0 kW (300,000 W) |
| Apparent Power (kVA) & Reactive Power (kVAR) | 352.94 kVA / 185.92 kVAR |
| Equivalent Mechanical Horsepower (HP) | 402.31 HP |
| NEC 125% Continuous Circuit Breaker | 700 A |
| Minimum Copper Conductor (100 ft / 30 m, ≤3% Drop) | 1000 kcmil (NEC) / 400 mm² (IEC) |
Frequently Asked Questions
How many amps is 300 kW at 400V (3-Phase)?
At 400V Three-Phase AC (IEC Europe), 300 kW equals 509.43 Amps at an industrial power factor of 0.85 (or 433.01 Amps at unity power factor 1.0).
What size breaker and wire is needed for 300 kW at 400V?
For 509.43A continuous load, NEC requires a 125% rated breaker of 700A with 1000 kcmil copper conductors, while IEC standard sizing uses a 600A breaker with 400 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)250 kW at 400V (3P)500 kW at 400V (3P)300 kW at 120V Single-Phase AC300 kW at 208V Single-Phase AC300 kW at 230V Single-Phase AC (IEC)300 kW at 240V Single-Phase AC (NEC)300 kW at 208V Three-Phase AC300 kW at 230V Three-Phase AC300 kW at 415V Three-Phase AC (UK / AU)300 kW at 480V Three-Phase AC (US Industrial)300 kW at 600V Three-Phase AC (Canada / Heavy)300 kW at 24V DC Direct Current300 kW at 48V DC Battery / Telecom Bus