USAS C57.12.21 / ANSI C57.12.21

Requirements for Pad-Mounted, Compartmental-Type Self-Cooled, Single-Phase Distribution Transformers With High Voltage Bushings; High-Voltage, 34500 GRYD/19920 Volts and Below; Low-Voltage, 240/120 Volts; 167 kVA and Smaller

Org/Number ID	USAS C57.12.21 / ANSI C57.12.21
Alternate Organization ID / number	IEEE
Version(s)	1969; 1980
Bin #	0498
Comments
Status	Present
Record last updated	June 19, 2022, 9:25 pm

This is not the most recent edition of this standard.

Newer edition note: 1992