IEEE 841-2009
Cooled (TEFC) Squirrel Cage Induction Motors--Up to and Including 370 kW (500 hp) - Redline
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About This Item
841-2009 is a technical standard for cooled (TEFC) squirrel cage induction motors rated up to and including 370 kW (500 hp), with guidance that supports consistent design and performance expectations. This standard is relevant where power, energy, and industrial applications depend on robust motor selection and dependable operation. It is a useful reference for engineers, buyers, and specifiers who need a clear basis for evaluating motor construction, ratings, and compliance for demanding equipment.
What is 841-2009?
841-2009 defines requirements for cooled, totally enclosed fan-cooled squirrel cage induction motors in the stated power range. In practice, it helps establish a common technical framework for motor features such as construction, thermal performance, and operational reliability. The document is especially relevant where motors must perform consistently under industrial duty conditions. As a standards document, it supports aligned expectations between manufacturers, purchasers, and end users when specifying motors for critical applications.
Where is 841-2009 used?
This standard is commonly used when specifying or procuring TEFC induction motors for industrial drives, process equipment, compressors, pumps, fans, and other rotating machinery. It may also be applied in facilities where dependable motor performance is important, including energy-related and heavy industrial settings. Because 841-2009 addresses motors up to 370 kW (500 hp), it is particularly suited to medium- and large-power applications where operating conditions, enclosure type, and performance expectations need to be clearly defined.
Why is 841-2009 important?
841-2009 matters because it helps reduce ambiguity in motor design and procurement. Clear technical requirements can improve consistency across suppliers, support testing and inspection, and lower the risk of selecting motors that do not match the intended duty. For purchasers and engineers, the standard provides a practical reference for comparing options and documenting compliance. It is especially valuable where reliability, service life, and predictable performance are important to plant operation and maintenance planning.
- TEFC squirrel cage induction motors
- Up to and including 370 kW (500 hp)
- Design and performance expectations
- Industrial and power applications
- Superseded technical reference
- Publication Date: 2009
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications; Geoscience; Components, Circuits, Devices and Systems
- Official IEEE: Doi link
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