API 547

General-Purpose Form-Wound Squirrel Cage Induction Motors—250 Horsepower and Larger
API Std 547 | 1st Edition | January 2005 |

Covers the requirements for form-wound induction motors for use in general-purpose petroleum, chemical, and other industrial severe duty applications. These motors are used to drive centrifugal loads with inertia values within those listed in NEMA MG 1 Part 20.

These motors are rated for:
— 250 hp (185 kW) through 3000 hp (2250 kW) for 4, 6, and 8 pole speeds,
— less than 800 hp (600 kW) for two-pole (3000 or 3600 RPM) motors of totally-enclosed construction,
— less than 1250 hp (930 kW) for two-pole motors of WP-II type enclosures.

This standard does not cover induction generators.