Input Parameters
About This Calculator
- 3φ: I = P×1000/(√3×V×η×cosφ)
- 1φ: I = P×1000/(V×η×cosφ)
- DOL start: 6× FLA typical
How this motor current calculator works
Rated current depends on motor type: 3φ: I = P×1000/(√3×V×η×cosφ). Starting current depends on start method.
DOL: 5-7× rated. Star-delta: 2-3×. Soft starter: 3-5×. VFD: ~1.5× rated current.
FAQ
Motor current formula?
3φ: I = P×1000/(√3×V×η×cosφ).
Starting current?
DOL: 5-7×. Star-delta: 2-3×. VFD: ~1.5×.
No-load current?
~25-40% of full load current.