IEEE 841-2021
Duty, Totally Enclosed Squirrel Cage Induction Motors from 0.75 kW to 370 kW (1 hp to 500 hp)
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About This Item
841-2021 is a technical standard for duty, totally enclosed squirrel cage induction motors in the 0.75 kW to 370 kW range (1 hp to 500 hp). It addresses motor construction and performance expectations for equipment used in power, energy, and industrial applications, where enclosure, duty rating, and reliable operation are important. For engineers, purchasers, and specifiers, this document helps define a consistent basis for selection, compliance review, and technical comparison.
Overview of 841-2021
The 841-2021 standard focuses on the requirements associated with severe-duty style totally enclosed squirrel cage induction motors. Its technical context is centered on motors that must operate dependably under demanding service conditions, where design details such as enclosure type, rating, and performance characteristics can affect long-term suitability. By setting a clearer reference point for these motors, the standard supports more consistent engineering decisions and helps align procurement specifications with actual operating needs.
Typical use cases
This standard is commonly relevant when specifying motors for pumps, compressors, fans, conveyors, and similar driven equipment in industrial plants and utility-related installations. It may also be used in geoscience or process environments where enclosed motor construction and dependable duty performance are important. Because the covered power range extends from 0.75 kW to 370 kW, 841-2021 can apply to both smaller machine drives and larger equipment trains that require controlled starting, steady operation, and durable service.
Why it matters
Using 841-2021 helps reduce ambiguity in motor selection and evaluation. When a project calls for a totally enclosed squirrel cage induction motor, the standard provides a shared technical reference for design expectations and performance review. That can support compliance efforts, improve purchasing consistency, and lower the risk of mismatched equipment in critical applications. It is especially useful where operational reliability, maintenance planning, and lifecycle performance matter as much as initial cost.
- Duty-rated totally enclosed motor requirements
- 0.75 kW to 370 kW power range
- Squirrel cage induction motor application focus
- Industrial and energy-sector equipment selection
- Specification and compliance reference
- Publication Date: 2021
- Standard Status: Active
- Publisher: IEEE
- Subject: Geoscience; Power, Energy and Industry Applications; Components, Circuits, Devices and Systems
- Official IEEE: Doi link
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