NEMA MG 1-2011 - User Manual

NEMA Condensed MG 1-2011
Information Guide for General Purpose Industrial AC Small
and
Medium Squirrel-Cage Induction Motor Standards
Published by
National Electrical Manufacturers Association
1300 North 17th Street, Suite 900
Rosslyn, Virginia 22209
www.nema.org
© 2014 National Electrical Manufacturers Association. All rights, including translation into other languages,
reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary
and Artistic Works, and the International and Pan American copyright conventions.

Summary

Motor Classification and Cooling

Classification of Degrees of Protection for Rotating Motors

Details IP codes for classifying motor enclosure protection against solids and water.

Degrees of Protection - First Characteristic Numeral

Explains the first numeral's meaning for protection against persons and parts.

Small and Medium Motors Ratings

Defines ratings for fractional and integral horsepower AC motors.

Motor Ratings Details

Horsepower and Speed Ratings

Details horsepower and speed ratings for various motor types.

Motor Dimensions and Frame Designations

Motor Tests and Performance

Routine Tests for Polyphase Medium Induction Motors

Describes routine factory tests for polyphase medium induction motors.

Thermal Protection of Medium Motors

Covers winding temperature limits and trip current for thermally protected medium motors.

Motor Efficiency Determination

Explains methods for determining motor efficiency and losses.

Motors with Adjustable Controls

Application Considerations for Adjustable Controls

Covers motor use with adjustable voltage or frequency controls.

Motor Torque with Adjustable Controls

NEMA MG 1-2011 Specifications

General

Brand	NEMA
Model	MG 1-2011
Category	Industrial Equipment
Language	English