Calculator
Motor Protection Arithmetic Check
Change the inputs to match your equipment. Results update automatically.
Formula
Current reference = I_rated x factor (Direct starting 1.6 - 2.0x, With drive 1.2x) Worked example
14.6 A × 1.6 = 23.36 A. The next listed nominal rating is 25 A; whether it is suitable cannot be determined by this multiplication.
Scope and interpretation
This arithmetic result is not a protective-device recommendation. Starting characteristics, cable protection, fault levels and manufacturer coordination must be checked.