PC57.12.38/D1.4, Oct 2013 is a technical standard for phase distribution transformers rated 250 kVA and smaller, covering high-voltage levels up to 34 500 GrdY/19 920 V and low-voltage levels up to 480/240 V. It is relevant to power and energy applications where transformer design, ratings, and performance need clear boundaries. For utilities, manufacturers, and specifiers, this standard helps define the requirements expected for compact distribution equipment used in routine service.

About PC57.12.38/D1.4, Oct 2013

This standard addresses the technical framework for phase distribution transformers used within defined voltage and kVA limits. PC57.12.38/D1.4, Oct 2013 is most useful when evaluating construction, insulation, rating, and performance expectations for smaller distribution units. Its scope suggests a focus on equipment that must operate reliably in everyday power delivery while fitting established design and testing practices. For procurement and engineering teams, it supports more consistent specification and comparison of transformer products.

Where is PC57.12.38/D1.4, Oct 2013 used?

PC57.12.38/D1.4, Oct 2013 is typically used in distribution networks that serve commercial, light industrial, and local utility installations. The subtitle points to phase transformers with high-voltage and low-voltage limits suited to feeder-level service, padmounted or pole-mounted applications, and similar power delivery equipment. It is especially relevant where smaller transformers are selected for replacement, design review, or specification control in systems that require defined voltage handling and dependable energy transfer.

Importance in practice

In practice, this standard helps reduce ambiguity in transformer selection, testing, and compliance checks. By setting a clear reference for ratings and application limits, PC57.12.38/D1.4, Oct 2013 supports safer procurement and more consistent engineering decisions. It can also help limit mismatch between design intent and installed equipment, which is important for reliability, insulation coordination, and service performance. For organizations managing distribution assets, it provides a practical basis for review and standardization.

• Phase distribution transformers
• 250 kVA and smaller units
• High-voltage service up to 34 500 GrdY/19 920 V
• Low-voltage service up to 480/240 V
• Design, rating, and performance reference