How Many Amps Is 264 kW at 575V?

264 kilowatts at 575V works out to roughly 311.86 amps on AC three-phase at PF 0.85. That is typical for commercial HVAC, industrial motors, rooftop units, and three-phase panel loads. See the DC and alternate-phase numbers below for other circuit types.

264 kW at 575V, AC three-phase (PF 0.85)

311.86 Amps

264 kilowatts at 575V on AC three-phase ≈ 311.86 amps

AC Single Phase (PF 0.85)540.15 A

DC (ideal baseline)459.13 A

Try: 200kW at 575V 150kW at 575V 125kW at 575V 100kW at 575V

Volts

Amps (AC three-phase, PF 0.85)

311.86

Formulas

DC: kW to Amps

I_(A) = 1000 × P_(kW) ÷ V_(V)

1000 × 264 ÷ 575 = 264,000 ÷ 575 = 459.13 A

AC Single Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (PF × V_(V))

264,000 ÷ (0.85 × 575) = 264,000 ÷ 488.75 = 540.15 A

AC Three Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (√3 × PF × V_L-L), where V_L-L is the line-to-line voltage

264,000 ÷ (1.732 × 0.85 × 575) = 264,000 ÷ 846.52 = 311.86 A

Equipment & Circuit Sizing

Breaker Sizing

Breaker ratings are in amps, not watts, so the real install answer depends on the equipment nameplate FLA, whether the load is continuous (NEC 210.19(A) sizes the conductor and OCP at 125% of a continuous load, equivalently 80% of breaker rating), conductor ampacity and temperature rating, ambient and bundling derates, and any motor or HVAC provisions (NEC 430 / 440). At roughly 311.86A on AC three-phase at 575V, the load sits in the bracket between a 350A standard size (non-continuous) and the next size up that covers a continuous load under 210.19(A) (around 400A). The actual install pick depends on whether the load is continuous and the factors above; a conversion page can't pick a single "right" breaker from the amp draw alone.

Energy Cost

264 kW costs $44.88/hour at $0.17/kWh (rates last reviewed April 2026). See breakdown.

Power Factor Reference (AC three-phase)

How the line current for 264 kW at 575V changes with load power factor, on the same AC three-phase circuit basis the rest of the page uses. DC has no power factor; PF 1.0 represents resistive AC loads.

Load Type	PF	264 kW at 575V (AC three-phase)
Resistive (heaters, incandescent)	1	265.08 A
Fluorescent lamps	0.95	279.03 A
LED lighting	0.9	294.53 A
Synchronous motors	0.9	294.53 A
Typical mixed loads	0.85	311.86 A
Induction motors (full load)	0.8	331.35 A
Computers (without PFC)	0.65	407.81 A
Induction motors (no load)	0.35	757.37 A

AC Conversion Comparison

On DC, 264kW at 575V draws 459.13A. AC single-phase at PF 0.85 pulls 540.15A because reactive current is added on top of the real power. Three-phase at the same voltage needs only 311.86A per line since the same 264kW is shared across three conductors instead of one.

Circuit Type	Formula	Result
DC	264,000 ÷ 575	459.13 A
AC Single Phase (PF 0.85)	264,000 ÷ (0.85 × 575)	540.15 A
AC Three Phase (PF 0.85)	264,000 ÷ (1.732 × 0.85 × 575)	311.86 A

Other kW Values at 575V

kW	AC 3-Phase per line, PF 0.85	AC 1-Phase PF 0.85
15 kW	17.72 A	30.69 A
18 kW	21.26 A	36.83 A
20 kW	23.63 A	40.92 A
22 kW	25.99 A	45.01 A
25 kW	29.53 A	51.15 A
30 kW	35.44 A	61.38 A
35 kW	41.34 A	71.61 A
40 kW	47.25 A	81.84 A
50 kW	59.06 A	102.3 A
60 kW	70.88 A	122.76 A
75 kW	88.6 A	153.45 A
100 kW	118.13 A	204.6 A
125 kW	147.66 A	255.75 A
150 kW	177.19 A	306.91 A
200 kW	236.26 A	409.21 A

Same kW, Other Voltages

Each destination page leads with the interpretation most common for that voltage, so the amps shown below use the same basis as the page you'd land on: single-phase for residential voltages, three-phase for commercial/industrial panel voltages, DC for low-voltage.

electrical_services 264 kW at 208V = 862.11A (3-phase) electrical_services 264 kW at 400V = 448.3A (3-phase) electrical_services 264 kW at 460V = 389.82A (3-phase) electrical_services 264 kW at 480V = 373.58A (3-phase)

Related Calculations

bolt 264,000W to amps at 575V payments 264,000W running cost cable Wire size for 311.86A at 575V (3Φ)

Frequently Asked Questions

How many amps is 264 kW at 575V?expand_more

264 kW at 575V draws about 311.86 amps on an AC three-phase circuit at PF 0.85. Alternate cases at the same voltage: 459.13A on DC, 540.15A on AC single-phase.

Why do industrial systems use kW instead of watts?expand_more

Industrial equipment operates at higher power levels. 264 kW is easier to express than 264,000W. The math is identical, just scaled by 1000.

What size breaker would I need for 264 kW at 575V?expand_more

This is a sizing question, not a conversion question, and there is no single correct answer from a page like this. Breaker selection depends on the equipment nameplate FLA, whether the load is continuous (NEC 210.19(A) applies the 125% continuous-load rule), the conductor ampacity and temperature rating, any NEC 430/440 motor or HVAC provisions, and local code interpretation. Use the nameplate and a licensed electrician for the real install value; use this page only for the current-draw estimate that feeds into that process.

How does three-phase affect the amps for 264 kW?expand_more

Three-phase at 575V draws 311.86A per line versus 540.15A single-phase. Less current per conductor means smaller wire and lower I²R losses.

How many amps does a 264 kW EV charger draw at 575V?expand_more

575V is commercial/industrial panel voltage, not a typical AC EVSE feed to a vehicle. On three-phase 575V, 264 kW works out to about 311.86A per line (three-phase at PF 0.85). In practice, 400-480V three-phase is usually the AC input to a DC fast charger (50-350 kW CCS/NACS stations like Tesla Superchargers), which rectifies to DC and delivers that directly to the vehicle, rather than an AC EVSE connector. A 264 kW figure at 575V is most likely the AC feed to a smaller commercial cabinet or the control-side input of a larger DC fast charger, not an at-the-car AC current.

This calculator provides estimates for reference purposes only. Always consult a licensed electrician and verify compliance with the National Electrical Code (NEC) and local electrical codes before performing any electrical work.