IEEE PC57.12.38/D6.3, Aug 08

PC57.12.38/D6.3, Aug 08 is a technical standard for cooled, single phase distribution transformers rated for high voltage systems at 34 500 GrdY/19 920 volts and below, with low voltage at 240/120 volts and capacities of 167 kVA and smaller. It is relevant to power and energy applications where transformer design, ratings, and operating characteristics must be defined clearly. For manufacturers, specifiers, and purchasers, it helps support consistent selection and engineering control.

PC57.12.38/D6.3, Aug 08 overview

This standard addresses the requirements and expected characteristics for cooled, single phase distribution transformers in a defined voltage and kVA range. PC57.12.38/D6.3, Aug 08 is typically used to align equipment design with specified high-voltage and low-voltage service conditions, helping ensure that transformers are rated and applied in a consistent way. In practice, it serves as a reference for technical documentation, product evaluation, and conformity to established transformer requirements in utility and industrial power systems.

Typical use cases

This standard is commonly relevant when specifying or reviewing single phase distribution transformers for overhead or pad-mounted service in power distribution networks. It may be used for utility procurement, transformer nameplate review, and engineering checks where 34 500 GrdY/19 920 volt class primary systems feed 240/120 volt secondary loads. It is also useful for equipment documentation in installations serving light commercial, rural, or local distribution applications that fall within the 167 kVA and smaller range.

Why this standard matters

Using PC57.12.38/D6.3, Aug 08 helps reduce ambiguity in transformer selection, testing, and acceptance. Clear requirements can improve consistency across suppliers, support safer system integration, and limit avoidable mismatches between voltage class, cooling arrangement, and load expectations. For power and energy projects, that kind of control matters because distribution transformers must perform reliably under defined service conditions. The standard also aids comparison during procurement and supports more disciplined engineering review.

• Single phase distribution transformers
• Cooled transformer construction
• High-voltage class up to 34 500 GrdY/19 920 volts
• Low-voltage 240/120 volt secondary
• Ratings of 167 kVA and smaller