IEEE PC57.12.34/D3.0, May 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
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Language: English
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About This Item
PC57.12.34/D3.0, May 2022 is a technical standard for phase distribution transformers rated 10 MVA and smaller, with high-voltage equipment at 34.5 kV nominal system voltage and below and low-voltage equipment at 15 kV nominal system voltage and below. It is relevant to components, circuits, devices, and systems used in power and energy applications, where consistent transformer design and evaluation help support dependable distribution service and clearer procurement decisions.
PC57.12.34/D3.0, May 2022 overview
This standard addresses the requirements and expected characteristics for phase distribution transformers within its stated ratings and voltage limits. PC57.12.34/D3.0, May 2022 is typically used as a reference for defining design intent, electrical performance, and related technical expectations for smaller transformer units in distribution networks. For engineering, purchasing, and compliance activities, it helps align equipment specifications with a common technical framework rather than relying on local interpretation alone.
Typical use cases
This standard is commonly applied when specifying or evaluating distribution transformers for utility feeder networks, local substations, and other power delivery systems that use single-phase transformer equipment. It may also support engineering review of transformer ratings, insulation coordination, and voltage suitability for installations operating within the listed high-voltage and low-voltage ranges. In practice, it is useful where consistent transformer selection, documentation, and acceptance criteria are needed for power, energy, and industrial applications.
Why this standard matters
PC57.12.34/D3.0, May 2022 matters because transformer selection affects system reliability, safety margins, and long-term operating performance. Using a defined standard can reduce ambiguity during design review, testing, and procurement, especially when comparing equipment from different sources. It also supports better alignment between specified ratings and actual service conditions, helping limit installation risk and improve consistency across distribution assets. For organizations managing transformer inventories, it can simplify compliance checks and technical acceptance.
- Phase distribution transformer requirements
- 10 MVA and smaller rating scope
- 34.5 kV and below high-voltage class
- 15 kV and below low-voltage class
- Distribution network specification reference
- Publication Date: 2022
- Standard Status: Inactive
- Publisher: IEEE
- Subject: Components, Circuits, Devices and Systems; Power, Energy and Industry Applications
- Official IEEE: Doi link
- New Version Available: PC57.12.34 (2022)
- This Version: PC57.12.34 (2022)
- Previous Version: PC57.12.34 (2022)
- Previous Version: PC57.12.34 (2015)
- Previous Version: PC57.12.34 (2015)
- Previous Version: PC57.12.34 (2009)
- Previous Version: PC57.12.34 (2009)
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