IEEE PC57.12.40/D14, Sept 2011
Phase Transformers, 2500 kVA and Smaller; High Voltage, 34 500 GrdY/19 920 and Below; Low Voltage, 600 Volts and Below; Subway and Vault Types (Liquid Immersed)
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About This Item
PC57.12.40/D14, Sept 2011 is a technical standard for liquid-immersed phase transformers rated 2500 kVA and smaller, covering high-voltage applications up to 34,500 GrdY/19,920 and low-voltage systems at 600 volts and below. It is relevant to power and energy equipment where design, ratings, insulation, and construction details must align with defined requirements. For procurement, engineering, and compliance work, PC57.12.40/D14, Sept 2011 helps provide a consistent basis for evaluating transformer products.
What is PC57.12.40/D14, Sept 2011?
This standard addresses the technical requirements for subway and vault-type liquid-immersed phase transformers within its stated rating range. PC57.12.40/D14, Sept 2011 is used to define expectations for electrical performance, insulation coordination, materials, and construction practices suited to compact or enclosed installations. In practical terms, it supports consistent specification of transformers that must operate safely and reliably under distribution conditions, while giving engineers and buyers a common reference for design and testing.
Where is PC57.12.40/D14, Sept 2011 used?
PC57.12.40/D14, Sept 2011 is typically applied where liquid-immersed transformers are installed in underground utility spaces, vaults, and subway-related power systems. It is most relevant to phase transformer equipment feeding low-voltage distribution networks and selected high-voltage service points within the listed limits. The standard is useful in utility projects, transit infrastructure, and other enclosed electrical installations where space, safety, and reliable operation are important.
Why is PC57.12.40/D14, Sept 2011 important?
This standard matters because transformer selection and installation depend on clear technical requirements, especially in confined environments. PC57.12.40/D14, Sept 2011 supports consistent design review, testing, and procurement by reducing ambiguity around ratings and construction expectations. It can also help lower risk by promoting compatibility with the intended voltage class and installation type. For engineering teams, the document provides a practical reference for comparing products and maintaining uniform performance expectations.
- Liquid-immersed phase transformers
- 2500 kVA and smaller ratings
- High-voltage systems up to 34,500 GrdY/19,920
- Low-voltage systems at 600 volts and below
- Subway and vault installation context
- Publication Date: 2011
- Standard Status: Inactive
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications; Components, Circuits, Devices and Systems
- Official IEEE: Doi link
- New Version Available: PC57.12.40 (2024)
- Previous Version: PC57.12.40 (2023)
- Previous Version: PC57.12.40 (2016)
- Previous Version: PC57.12.40 (2011)
- This Version: PC57.12.40 (2011)
- Previous Version: PC57.12.40 (2006)
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