IEEE C57.13.5-2003
IEEE Standard of Performance and Test Requirements of Instrument Transformers of a Nominal Voltage of 115 kV and Above
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About This Item
IEEE C57.13.5-2003 defines performance and test requirements for instrument transformers used at nominal voltages of 115 kV and above. It is relevant to power, energy, and industry applications where accurate current and voltage transformation supports measurement, protection, and control. By setting clear expectations for electrical performance and verification, the standard helps users evaluate equipment suitability and compare products with greater confidence in high-voltage service.
IEEE C57.13.5-2003 overview
This technical document focuses on instrument transformers designed for high-voltage systems, with attention to how they should perform under specified operating and test conditions. IEEE C57.13.5-2003 is intended to support consistent evaluation of accuracy, insulation, and related performance characteristics for equipment installed at 115 kV and above. For buyers, engineers, and testing teams, it provides a structured reference for checking whether a transformer design meets the expectations of demanding power-system applications.
Typical use cases
The standard is commonly used when specifying or verifying instrument transformers for substations, transmission networks, and other high-voltage installations. It is relevant to current transformers and voltage transformers that feed metering, protection relays, and supervisory systems in power and energy environments. IEEE C57.13.5-2003 may also be used during procurement and acceptance testing to confirm that equipment is appropriate for the voltage level, service conditions, and performance needs of the installation.
Why this standard matters
For high-voltage instrument transformers, consistent performance is essential to accurate system measurement and dependable protection. IEEE C57.13.5-2003 helps reduce uncertainty by defining test and performance expectations that support design control, compliance checks, and equipment comparison. In practice, this can improve procurement decisions, limit installation risk, and make it easier to verify that a transformer will behave as intended in service. As a superseded standard, it may also remain useful for legacy equipment review.
- Instrument transformers for 115 kV and above
- Performance and test requirements
- Metering and protection applications
- High-voltage power-system verification
- Legacy equipment and compliance review
- Publication Date: 2003
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications
- Official IEEE: Doi link
- New Version Available: C57.13.5 (2020)
- Previous Version: C57.13.5 (2009)
- This Version: C57.13.5 (2003)
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