IEEE C57.15-2009
Voltage Regulators
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About This Item
C57.15-2009 is a technical standard for voltage regulators, written for power, energy, and related industrial applications where stable voltage control is important. It provides a focused reference for the design, performance, and evaluation of regulator equipment used to help maintain acceptable supply conditions. For engineers, purchasers, and compliance teams, C57.15-2009 supports more consistent specification and review of voltage-regulating apparatus in electrical systems.
C57.15-2009 overview
This standard addresses voltage regulators in a power-system context, where controlled voltage is needed to support reliable equipment operation and acceptable service quality. C57.15-2009 is relevant to the technical requirements that commonly shape regulator construction, ratings, and performance expectations. It is especially useful when comparing products or confirming that a regulator design aligns with established industry practice for electrical utility and industrial power applications.
Typical use cases
C57.15-2009 is typically used when specifying or reviewing voltage regulators for distribution networks, substation-related equipment, and other power-system installations that must manage voltage variation. It may also support procurement and acceptance activities for regulators intended for utility service or industrial power infrastructure. In practice, the standard is helpful wherever consistent voltage control, equipment interchangeability, and clear technical expectations are important to system operation.
Why this standard matters
Voltage regulation affects equipment performance, service continuity, and overall system stability, so a defined standard helps reduce uncertainty in design and procurement. C57.15-2009 gives stakeholders a common reference for evaluating whether a voltage regulator is suitable for its intended electrical duty. Using a recognized standard can improve consistency in testing, documentation, and acceptance decisions, while also helping limit risk from mismatched specifications or uneven performance.
- Voltage regulator technical reference
- Power-system performance expectations
- Design and rating consistency
- Procurement and acceptance support
- Utility and industrial application focus
- Publication Date: 2009
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications
- Official IEEE: Doi link
- New Version Available: C57.15 (2018)
- This Version: C57.15 (2009)
- Previous Version: C57.15 (2000)
- Previous Version: C57.15 (1988)
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