IEEE C57.91-2011
Voltage Regulators
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About This Item
C57.91-2011 is a technical standard for voltage regulators, providing guidance for equipment used to control voltage in power and energy applications. It is relevant where stable output, system coordination, and dependable regulation matter in electrical networks and engineered device assemblies. By focusing on voltage regulator performance and related engineering considerations, C57.91-2011 helps support consistent design and evaluation practices for utility and industrial power systems.
About C57.91-2011
C57.91-2011 addresses the technical context of voltage regulators within power, energy, and industry applications. As a standards document, it is typically used to define expected characteristics, terminology, and performance-related considerations for regulating voltage in electrical systems. The standard is useful for organizations that need a clear reference when reviewing equipment suitability, comparing designs, or documenting compliance-related requirements. Its scope supports disciplined engineering around regulation behavior, device application, and system compatibility.
Where is C57.91-2011 used?
This standard is commonly used in utility distribution systems, industrial power installations, and equipment design workflows where voltage regulation is needed to maintain stable service. It may also be relevant to teams working with components, circuits, and devices that rely on controlled voltage conditions. C57.91-2011 is helpful during specification review, procurement, acceptance testing, and engineering analysis for regulators and related control hardware. In practice, it supports consistent selection and application of voltage regulation equipment.
Importance in practice
Voltage regulation affects equipment performance, power quality, and operational reliability, so a standard such as C57.91-2011 can reduce ambiguity in design and verification. It helps engineers and buyers align on requirements for regulator behavior, which supports safer integration and more predictable operation. Using a recognized technical reference can also improve consistency across projects, simplify comparison of products, and lower the risk of mismatched equipment in electrical systems where controlled voltage is important.
- Voltage regulator application guidance
- Power system and industrial use cases
- Performance and compatibility considerations
- Design, review, and procurement support
- Publication Date: 2012
- Standard Status: Inactive
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications; Components, Circuits, Devices and Systems; Engineered Materials, Dielectrics and Plasmas
- Official IEEE: Doi link
- This Version: C57.91 (2012)
- Previous Version: C57.91 (2003)
- Previous Version: C57.91 (1995)
- Previous Version: C57.91 (1981)
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