IEEE C57.13.5-2009
IEEE Standard of Performance and Test Requirements for Instrument Transformers of a Nominal System Voltage of 115 kV and Above
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About This Item
IEEE C57.13.5-2009 is a technical standard for instrument transformers used on nominal system voltages of 115 kV and above. It addresses performance and test requirements for equipment that must measure or support high-voltage power systems with consistent accuracy and reliable insulation behavior. In power, energy and industry applications, this standard helps define expectations for testing and compliance, which can reduce uncertainty when specifying, evaluating, or procuring instrument transformers for transmission-level service.
What is IEEE C57.13.5-2009?
IEEE C57.13.5-2009 sets out performance and test requirements specifically for instrument transformers intended for high-voltage systems at 115 kV and above. Its purpose is to provide a common technical basis for how these devices are assessed, helping engineers and buyers compare designs more consistently. The document is relevant to transformers used for measurement, metering, and protective functions, where accuracy and dependable operation are important under demanding electrical conditions.
Where is IEEE C57.13.5-2009 used?
IEEE C57.13.5-2009 is commonly applied in transmission and substation environments where instrument transformers must support high-voltage measurement and protection duties. It is relevant to utility systems, grid infrastructure, and industrial power installations that operate at 115 kV and above. The standard is also useful during equipment specification, factory testing, and acceptance review when selecting current or voltage transformers for metering, relaying, and other high-voltage workflows.
Why is IEEE C57.13.5-2009 important?
This standard matters because instrument transformers play a key role in accurate system monitoring and protective control at high voltages. IEEE C57.13.5-2009 helps establish clear performance and test expectations, which supports consistent design, safer procurement decisions, and more reliable acceptance testing. For projects involving transmission equipment, a defined specification can reduce risk, improve comparability between products, and help confirm that transformers meet the intended service conditions.
- Instrument transformer performance requirements
- Testing for 115 kV and above
- Measurement and protection applications
- High-voltage utility and industrial systems
- Compliance and acceptance review support
- Publication Date: 2009
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications
- Official IEEE: Doi link
- New Version Available: C57.13.5 (2020)
- This Version: C57.13.5 (2009)
- Previous Version: C57.13.5 (2003)
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