EC&M magazine has just published a second edition of Practical Guide to Motors and Motor Controllers. Much new information, many new control techniques and an entire new generation of motors and motor-control equipment have become available since the first edition was published in 1993. The new edition reflects these changes and brings the information up to 1999 NEC standards. It also details the newest technology in the motors, starters and VFD controller field and discusses how the technologies can save initial cost, energy cost, maintenance cost and equipment replacement cost. The book provides specific information about favorable and tolerable voltage excursion limits and the effects on the motor of each, including considerations of total voltage harmonic distortion and its effects on motor heating and service factor. Also included are checklists of what to look for in specifying motor control centers and variable speed drives. For more information or to order this 92-page book, call 800-543-7771.

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