IEEE C57.12.34-2022
Phase Distribution Transformers, 10 MVA and Smaller; High-Voltage, 34.5 kV Nominal System Voltage and Below; Low-Voltage, 15 kV Nominal System Voltage and Below - Redline
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About This Item
C57.12.34-2022 defines technical requirements for phase distribution transformers rated 10 MVA and smaller, with high-voltage systems at 34.5 kV nominal and below and low-voltage systems at 15 kV nominal and below. As a redline edition, it is useful for tracking revisions to this transformer standard and understanding how requirements affect design, testing, and specification. In power, energy and industry applications, C57.12.34-2022 helps support consistent transformer selection and compliance.
About C57.12.34-2022
This standard addresses the engineering and performance expectations for phase distribution transformers within the stated voltage and power limits. C57.12.34-2022 is relevant when comparing design requirements, insulation levels, ratings, and other technical provisions that influence safe and reliable operation. The redline format can help users identify changes in the document more efficiently, which is especially useful for procurement, specification review, and internal standards management in transformer-related work.
Where is C57.12.34-2022 used?
C57.12.34-2022 is commonly used in utility and industrial environments where phase distribution transformers serve medium-voltage distribution systems and step-down applications. It is relevant to equipment planners, specification writers, manufacturers, and testing teams working with transformers in substations, local distribution networks, and facility power systems. The standard is particularly useful when selecting transformers for projects that must align high-voltage and low-voltage ratings with established design and performance expectations.
Importance in practice
Using C57.12.34-2022 supports more consistent design control and procurement by setting a shared reference for transformer requirements. That consistency can reduce misalignment between manufacturers and purchasers, improve comparison of bids, and help verify that equipment meets expected electrical and mechanical criteria. For power and energy applications, the standard also supports safer operation and lower risk by making it easier to evaluate ratings, construction details, and testing obligations against a recognized technical basis.
- Phase distribution transformer requirements
- 10 MVA and smaller ratings
- 34.5 kV nominal and below
- 15 kV nominal and below
- Redline revision reference
- Publication Date: 2022
- Standard Status: Active
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications
- Official IEEE: Doi link
- This Version: C57.12.34 (2022)
- Previous Version: C57.12.34 (2015)
- Previous Version: C57.12.34 (2010)
- Previous Version: C57.12.34 (2005)
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