Motor catalogue selector

User data only. P = torque × rpm × 2π/60; π = 3.141592653589793 and √3 = 1.7320508075688772 are declared approximations. Decimal unit conversions are exact rational operations. Missing ratings or requirements remain unknown.

No NEMA/IEC catalogue, service factor or efficiency is assumed. Regional standards, licensed current data and professional review are required for compliance approval. Inputs stay in this browser.

Schema: power W/kW/hp (mechanical hp = 745.69987158227022 W); torque and startTorque N·m/lbf·ft; rpm rpm/rad/s; voltage V/kV; current A/mA; frequency Hz; phase 1/3/DC; duty and environment exact strings. efficiency and powerFactor are fractions (0–1), only when supplied. Demand current is the permitted maximum. Other numeric demand fields are minimum ratings except voltage/frequency (equal), rpm (minimum, with optional maxRpm). Demand requires power or torque plus rpm, voltage, current, phase, frequency, duty, environment and startTorque for a complete screen. Extra fields are rejected.

Limits: each JSON input ≤200,000 characters; each list ≤200 rows; catalogue × scenarios ≤5,000 pairs; full report ≤4,000,000 characters. Exceeding any limit rejects the whole calculation without truncation.