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
STANDARD published on 16.7.2025
Designation standards: IEEE C57.12.38-2025
Publication date standards: 16.7.2025
The number of pages: 39
Approximate weight : 117 g (0.26 lbs)
Country: International technical standard
Category: Technical standards IEEE
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: 979-8-8557-1370-1, 979-8-8557-2234-5, 979-8-8557-2235-2
Number of Pages: 39
Product Code: STDAPE27423, STD27965, STDPD27965
Keywords: distribution transformers, IEEE C57.12.38(TM), pad-mounted, padmounted, single phase, single-phase, transformer
Category: Transformers
Draft Number: PC57.12.38/D2.9, Oct 2024 - APPROVED DRAFT