Calculator · Electrical Engineering
Star–Delta Line & Phase Relations Calculator
Balanced connections relate line and phase quantities without any power calculation: in star the line voltage is √3 times the phase voltage; in delta the line current is √3 times the phase current.
Inputs
Results
Phase voltage Vphase
230.9 V
Phase current Iphase
10 A
| Line-to-line voltage VLL | 400 V |
|---|---|
| Line current Iline | 10 A |
| Relation | VLL = √3·Vphase · Iline = Iphase |
Assumptions
- · balanced three-phase system
Explore in the Lab
Continue in the Power & Three-Phase Lab
Carries the connection and line quantities; the Lab asks for the power factor.
Technical reference
Star: VLL = √3 · Vphase, Iline = Iphase
Delta: VLL = Vphase, Iline = √3 · Iphase
- VLL
- line-to-line voltage (≥ 0)[V]
- Vphase
- phase voltage[V]
- Iline
- line current (≥ 0)[A]
- Iphase
- phase current[A]
Reference: star 400 VLL → Vphase ≈ 230.94 V; delta 10 A line → Iphase ≈ 5.7735 A.
Star and delta relations are never mixed; balanced systems only.