Three-phase kVA to amps converter
Pick the line voltage, then convert a three-phase load or transformer rating in kVA to the current in each line, or amps back to kVA.
That's 3.3× as large as a small workshop, while an office building is 2.5× larger. At 400 V that draws 144.3 A in each line.
What it means
How large a load is that?
Balanced three-phase load, line-to-line voltage. For kW multiply kVA by the power factor; for single phase use the watts-to-amps converter.
Every unit
That load at this voltage
Learn
Three things worth knowing
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kVA × 1.44 at 400 V
Amps = kVA × 1000 ÷ (1.732 × V): ×1.44 at 400 V, ×2.78 at 208 V, ×1.2 at 480 V.
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Tesla and Dolivo-Dobrovolsky
Nikola Tesla patented polyphase motors in 1888; Mikhail Dolivo-Dobrovolsky built the first three-phase transmission line in 1891.
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Line or phase voltage
Use the line-to-line voltage (400 V), not line-to-neutral (230 V), with √3; mixing them is off by 73 %.
Shortcuts
Popular apparent power conversions
Background
About three-phase power
Industrial supplies use three phases, each 120° apart. For a balanced load the apparent power is S = √3 × V × I, with V the line-to-line voltage. At 400 V, each kVA draws 1.44 A per line; at 480 V, 1.2 A.
Transformers and generators are rated in kVA because their heating depends on current, whatever the power factor.