IEEE C57.12.24-2000
Phase Distribution Transformers 2500 kVA and Smaller; High Voltage: 34,500 GrdY/29 920 Volts and Below; Low Voltage: 480 Volts and Below--Requirements
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About This Item
C57.12.24-2000 is a technical standard for phase distribution transformers rated 2500 kVA and smaller, with high voltage at 34,500 GrdY/29,920 volts and below and low voltage at 480 volts and below. It addresses requirements that help define transformer design, ratings, and performance expectations for power and energy applications. For buyers, engineers, and specifiers, this document is useful for aligning procurement and compliance decisions around a clearly defined distribution transformer class.
C57.12.24-2000 overview
This standard sets requirements for phase distribution transformers used within the voltage and kVA limits defined in the title. In practice, C57.12.24-2000 helps establish a consistent technical basis for construction, electrical characteristics, and related engineering expectations for these units. Because it is a superseded document, it may still appear in legacy specifications, equipment records, or archived procurement references where historical conformity is relevant to transformer selection and review.
Typical use cases
C57.12.24-2000 is commonly relevant when specifying or evaluating smaller phase distribution transformers for utility distribution networks, commercial service entrances, and industrial power systems operating within the listed voltage range. It may also be used in equipment procurement, catalog review, and design verification for transformers serving feeder-level distribution or step-down applications. For teams working in power, energy, and related industry applications, it provides a focused reference point for matching equipment to established requirements.
Why this standard matters
This standard matters because transformer requirements affect system reliability, interchangeability, and safe operation. Using a document like C57.12.24-2000 helps reduce ambiguity in design and purchasing by defining the expected scope for rated voltage, capacity, and transformer type. It can support more consistent testing and acceptance decisions, especially where legacy equipment or older specifications are involved. Clear requirements also help lower risk during replacement, maintenance, and specification review.
- Phase distribution transformer requirements
- 2500 kVA and smaller scope
- High-voltage limit: 34,500 GrdY/29,920 V
- Low-voltage limit: 480 V
- Legacy reference for superseded specifications
- Publication Date: 2000
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications
- Official IEEE: Doi link
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