Electrical Calculators
Motor Circuit
Calculate motor power relationships without substituting for nameplate data.
01
Inputs
02
Result & worksheet
6.36 kW estimated output
Recorded summary
- Voltage: 480 V
- Current: 10 A
- Input: 7.07 kW
- Output: 6.36 kW
Formula used
Output kW ≈ √3 × V × I × PF × efficiency ÷ 1,000Calculation steps
- √3 × 480 × 10 × 0.85 ÷ 1,000 = 7.07 kW input
- 7.07 × 0.9 = 6.36 kW output
Assumptions
- Balanced three-phase motor
- Measured current is stable
- Nameplate and applicable code motor tables govern circuit design
Verify before use
- Motor nameplate voltage, current, service factor, duty, and efficiency
- Applicable motor table value for conductor and protection calculations
- Overload, short-circuit, ground-fault, and controller requirements
- Phase balance and mechanical load