Superseded Standard

IEEE 588-1976

IEEE Guide for AC Motor Protection

This application guide for the relay protection of squirrel-cage and wound-rotor induction motors and synchronous motors presents a review of the generally accepted forms of motor protection and summarizes the use of relays and devices, singly and in combination, so the reader may select the necessary equipment to obtain adequate motor protection. The guide is concerned primarily with the protection of three-phase integral horsepower motors and refers to twophase motors only in special instances where specifically indicated. This guide is not a standard and does not purport to detail the protective requirements of all motors in every situation. Its recommendations are of a general nature, designed to cover the usual or typical motor installations. Sufficient background material on objectives,applications, and setting philosophy is presented, however, to enable the reader to evaluate the need for various forms of protection and to select and properly apply suitable equipment for most situations.

Superseded Standard
Board Approval
ANSI Approved:

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