IEEE PC37.90/D15
Immersed Distribution Substation Transformers (Revision of C37.90-1989) Superseded by C37.90-2005
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- Language: English
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About This Item
PC37.90/D15 is an inactive technical document for immersed distribution substation transformers, providing guidance connected to power, energy, and industry applications. It is relevant to the design and evaluation of transformer equipment used in distribution substations, where insulation, performance, and dependable operation are important. As a revision of C37.90-1989 and later superseded by C37.90-2005, PC37.90/D15 reflects an earlier stage of the standard’s development and remains useful for reference and historical comparison.
PC37.90/D15 overview
This standard addresses immersed distribution substation transformers in a power-system context, with attention to technical requirements that support consistent equipment selection and engineering practice. PC37.90/D15 is associated with the broader need to define how these transformers are specified, tested, and applied within substations serving distribution networks. Because it is an earlier revision, it can be helpful when reviewing legacy design assumptions, older procurement records, or the evolution of transformer requirements over time.
Typical use cases
PC37.90/D15 is commonly relevant when working with oil-immersed distribution transformers installed in substations for utility and industrial power distribution. It may be used when reviewing legacy substation equipment, comparing historical specifications, or checking how a transformer document aligns with older design and testing practices. The standard can also support engineering teams involved in maintenance planning, replacement studies, and documentation of equipment originally specified under earlier distribution transformer requirements.
Why this standard matters
Even though PC37.90/D15 is inactive, it still matters for projects that involve older transformer fleets or archived specifications. It helps support clearer interpretation of past requirements, which can reduce ambiguity during procurement review, condition assessment, and retrofit planning. For power and industry applications, having a defined technical reference improves consistency in equipment documentation and helps engineers compare legacy designs against later revisions. That can lower risk when matching replacement transformers to existing substation systems.
- Immersed distribution substation transformers
- Legacy revision reference
- Substation equipment documentation
- Testing and specification context
- Superseded by C37.90-2005
- Publication Date: 2004
- Standard Status: Inactive
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications
- Official IEEE: Doi link
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