NEMA design E motors and controls-what´s it all about?

Author

Kilburn, Jeffrey A. ; Daugherty, R.H.

Author_Institution

Allen-Bradley Co., Milwaukee, WI, USA

fYear

1997

Firstpage

25

Lastpage

35

Abstract

Quite a bit of confusion exists in industry on the new NEMA design “E” motors and the associated equipment used to control them. While considerable information has been published on the motors themselves, articles typically do not cover both the motor and related control aspects. This paper first discusses the motor design background and related issues and then moves to the effects on motor controls. Issues covered include: characteristic´s of NEMA Design E motors; the impact of the 1997 Federal Mandate on energy efficient motors; UL´s position on test requirements for motor controllers used with NEMA Design E motors; the potential for nuisance tripping of overload relays and instantaneous circuit breakers; and the new Design E rating rules in Article 430 of the 1996 National Electrical Code

Keywords

control equipment; controllers; electric motors; machine control; machine testing; standards; 1996 National Electrical Code Article 430; 1997 Federal Mandate; NEMA design E motors; energy efficient motors; instantaneous circuit breakers; motor controllers; motor controls; nuisance tripping; overload relays; short circuit protection; test requirements; Circuit testing; Energy conservation; Energy efficiency; IEC standards; Industrial control; Motor drives; Protection; Relays; Rotors; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Petroleum and Chemical Industry Conference, 1997. Record of Conference Papers. The Institute of Electrical and Electronics Engineers Incorporated Industry Applications Society 44th Annual

Conference_Location

Banff, Alta.

ISSN

0090-3507

Print_ISBN

0-7803-4217-8

Type

conf

DOI

10.1109/PCICON.1997.648164

Filename

648164