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IEEE 841
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IEEE 841 2009 Edition, March 19, 2009 Petroleum and Chemical Industry—Premium- Efficiency, Severe-Duty, Totally Enclosed Fan-Cooled (TEFC) Squirrel Cage Induction Motors—Up to and Including 370 kW (500 hp)
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Description / Abstract:
This standard applies to premium-efficiency totally enclosed
fan-cooled (TEFC), horizontal and vertical, single-speed, squirrel
cage polyphase induction motors, up to and including 370 kW (500
hp), and 4000 V nominal, in National Electrical Manufacturers
Association (NEMA) frame sizes 143T and larger, for petroleum,
chemical, and other severe-duty applications (commonly referred to
as premium-efficiency severe-duty motors). Excluded from the scope
of this standard are motors with sleeve bearings and additional
specific features required for explosion-proof motors.
Purpose
The purpose of this standard is to define a specification that deals with mechanical and electrical performance, electrical insulation systems, corrosion protection, and electrical and mechanical testing for severe-duty TEFC squirrel cage polyphase induction motors, up to and including 370 kW (500 hp), for petroleum and chemical industry application. Many of the specified materials and components in this standard stem from experience with severely corrosive atmospheres and the necessity for safe, quiet, reliable, premium efficiency motors.
Purpose
The purpose of this standard is to define a specification that deals with mechanical and electrical performance, electrical insulation systems, corrosion protection, and electrical and mechanical testing for severe-duty TEFC squirrel cage polyphase induction motors, up to and including 370 kW (500 hp), for petroleum and chemical industry application. Many of the specified materials and components in this standard stem from experience with severely corrosive atmospheres and the necessity for safe, quiet, reliable, premium efficiency motors.