Table of Contents

1. Overview
2. Normative references
3. Definitions
4. Service conditions
5. Transformer section
6. Incoming section
7. Outgoing section
8. Ratings
9. Construction
10. Typical arrangements
11. Guide for selection, application, installation and
    maintenance of unit substations
Annex A (informative) - Bibliography

Abstract

Provides three-phase unit substations for step-down operation in the range of 112.5 kVA or greater at primary voltages of 601 V through 38 kV.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN
Supersedes	ANSI C37.121 : 2012