IEEE 275-1981

275-1981 is a technical standard for insulated stator coils used in electrical machines rated 6900 V and below. It addresses the design and expected characteristics of coil insulation in machines where dielectric integrity is critical, helping define a common basis for engineering and evaluation. In the context of engineered materials and electromagnetics, 275-1981 is relevant to consistency, performance, and safe operation in rotating equipment that relies on dependable coil insulation.

What is 275-1981?

275-1981 is a superseded standard focused on insulated stator coils for machines within a 6900 V and below rating range. It serves as a technical reference for the construction or qualification of coil insulation in electrical machinery, where material behavior and dielectric performance are closely linked. As a standards document, it would typically support consistent specification, inspection, and comparison of stator coil insulation across designs and procurement needs.

Where is 275-1981 used?

This standard is most relevant in the design, manufacture, and maintenance of medium-voltage rotating machines that use insulated stator coils. Typical applications may include motors, generators, and similar electrical equipment where coil insulation must withstand operating voltages up to 6900 V. It can also be useful in engineering, repair, and sourcing workflows when teams need a defined reference for coil insulation requirements and material selection.

Why is 275-1981 important?

In practice, 275-1981 helps reduce uncertainty around insulated stator coil requirements for machines operating at significant voltage levels. A clear standard can support more consistent design decisions, better quality control, and more reliable testing or acceptance checks. For purchasers and engineers, it also provides a common technical basis when comparing products or evaluating compliance, which may lower risk in equipment performance and long-term insulation integrity. The superseded status of 275-1981 makes version awareness especially important.

• Insulated stator coil requirements
• Machines rated 6900 V and below
• Dielectric and insulation performance
• Design, testing, and procurement reference
• Superseded technical document