Motor
Find motor full load current, starting current and cable.
Questions
Each answer describes what this tool calculates. The result is a design aid. Verify against the current standard.
What does the motor calculator do?
The tool reports the full load current, the synchronous speed, the shaft speed, the full load torque and the starting current of an induction motor. It works from the shaft rating in kilowatts, the voltage, the phase count, the pole count and the slip.
Which inputs matter most?
The shaft rating and the voltage set the current. Power factor and efficiency both raise the current for the same shaft rating. The pole count and the supply frequency set the synchronous speed. The slip percent sets how far the shaft speed falls below it.
How is the starting current worked out?
The tool assumes a direct on line start at six times the full load current. It says so in a note with every result. A soft starter, a star delta starter or a variable speed drive gives a different starting current. Use the nameplate figure when you have one.
Can I use the result to size a cable?
Use the full load current as the design current in the cable size tool. Motor starting also affects the voltage drop and the protective device choice, and this tool does not check those. The inputs sit in the page address, so a link reproduces the result.