Active standard | Published: 16/07/2025

IEEE C57.12.38-2025

IEEE Standard for Pad-Mounted-Type, Self-Cooled, Single-Phase Distribution Transformers 250 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 V and Below; Low Voltage, 480/240 V and Below

Available languages: English

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Detail information

Designation: IEEE C57.12.38-2025

Publication date: 16/07/2025

Pages: 39

Country: International technical standard

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Anotation

Revision Standard - Active.
Certain electrical, dimensional, and mechanical characteristics are covered in this standard, and certain safety features of single-phase, 60-Hz, liquid-filled, self-cooled, pad-mounted, compartmental-type distribution transformers are taken into consideration. These transformers are rated 250 kVA and smaller, with high voltages of 34 500 GrdY/19 920 V and below, and with low voltages of 480/240 V and below. These transformers are generally used for step-down purposes from an underground primary cable supply. The connector, bushing, and terminal arrangements for radial or loop feed systems are covered in this standard. The electrical and mechanical requirements of any accessory devices that may be supplied with the transformer are not covered in this standard.

ISBN: 979-8-8557-2234-5, 979-8-8557-2235-2
Number of Pages: 39
Product Code: STD27965, STDPD27965
Keywords: distribution transformers, IEEE C57.12.38(TM), pad-mounted, padmounted, single phase, single-phase, transformer
Category: Transformers

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