Quick Answer
Motor full load current: I = P / (sqrt3 * V * PF * eta)
Calculator
Result Interpretation
The result is computed directly from the entered inputs using I = P / (sqrt3 * V * PF * eta).
Worked Example
Verified calculation
Given:
- power = 7.5
- voltage = 400
- power_factor = 0.85
- efficiency = 0.9
Expected Result:
- current = 14.19
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from verified test cases.
Formula / Method
I = P / (sqrt3 * V * PF * eta)Motor full load current deterministic formula family formula_motor_current (DETERMINISTIC_AXIOM)
Standards: FormulaLibrary verified formula: formula_motor_current
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| power | Power | INPUT | Power |
| voltage | Voltage | INPUT | Voltage |
| power_factor | Power factor | INPUT | Power factor |
| efficiency | Efficiency | INPUT | Efficiency |
| current | Full load current | OUTPUT | Full load current |
Calculation Steps
- Enter the power in kW.
- Enter the voltage in V.
- Enter the power factor in ratio.
- Enter the efficiency in ratio.
- Step 1: Compute full load current.
- Read the full load current (A) from the results.
Engineering Summary
What is the result of Motor full load current computed from the given inputs using I = P / (sqrt3 * V * PF * eta)? The calculation uses deterministic formula evaluation. This tool is applicable in engineering calculation.
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Notes / Limitations
- ASSUMPTION3-phase AC motor
- LIMITATIONValid only within the stated assumptions of Motor full load current.
Frequently Asked Questions
What does this calculator calculate?
The Motor Full-Load Current and Circuit Breaker Sizing Tool estimates Full load current based on the input parameters you provide
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Power (kW), Voltage (V), Power factor (ratio), Efficiency (ratio). Make sure all inputs use the specified units for consistent results
How does Power affect the results?
The power directly affects: Full load current. Increasing or decreasing this value will change these output values according to the engineering formula
How should I interpret the calculated results?
The calculator provides the following outputs: full load current in A. Results are computed from the input values using the defined calculation method. Always verify results against project-specific requirements and applicable standards
What assumptions does this calculator use?
This calculator uses verified engineering formulas; the calculation method is based on deterministic formula evaluation, and references FormulaLibrary verified formula: formula_motor_current. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
When is this calculation useful?
The Motor Full-Load Current and Circuit Breaker Sizing Tool is useful during preliminary design, feasibility studies, and quick engineering checks in engineering calculation projects. It helps engineers and designers estimate key parameters before proceeding with detailed analysis
Technical Details
- Assumption
- 3-phase AC motor
- Limitation
- Valid only within the stated assumptions of Motor full load current.
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