PC57.12.36/D4, Aug 2014 is a technical standard for immersed distribution substation transformers, addressing the engineering and performance expectations associated with these power equipment assets. It is relevant to Power, Energy and Industry Applications as well as components and materials used in electrical systems, where transformer design, insulation, and operating reliability need to be controlled. For utilities, specifiers, and equipment purchasers, this standard helps define a clearer basis for comparing products and checking compliance.

PC57.12.36/D4, Aug 2014 overview

This standard focuses on immersed distribution substation transformers used in electrical distribution infrastructure. PC57.12.36/D4, Aug 2014 is generally applied when a project needs consistent technical requirements for transformer construction, ratings, and performance-related expectations. By setting a defined reference for the equipment category, it supports more uniform product evaluation, procurement, and engineering review. The document is especially useful where insulated, liquid-immersed transformer design must align with established distribution substation practice.

Typical use cases

PC57.12.36/D4, Aug 2014 is commonly used when specifying transformers for distribution substations, utility feeder systems, and other electrical installations that rely on immersed transformer technology. It may also support equipment selection for industrial power networks and engineered electrical assemblies where transformer insulation and service conditions matter. The standard is relevant during design review, supplier comparison, testing coordination, and acceptance of transformer units intended for grid-connected or facility distribution applications.

Why this standard matters

Using PC57.12.36/D4, Aug 2014 helps reduce ambiguity in transformer requirements and supports more consistent compliance checks across projects. For immersed distribution substation transformers, that consistency matters because performance, insulation behavior, and construction details can affect reliability and safety in service. The standard can also improve procurement decisions by giving buyers a clearer technical baseline, which helps limit substitution risk and supports more predictable testing and engineering outcomes.

• Immersed distribution substation transformers
• Electrical ratings and performance expectations
• Insulation and dielectric considerations
• Utility and industrial distribution applications
• Specification, testing, and compliance reference