C57.12.21-2000 American National Standard Requirements for Pad-Mounted, Campartmental-Type, Self-Cooled, Single-Phase Distribution Transformers With High-Voltage Bushings: High Voltage (34 500 GrdY/19 920 V and Below) and Low Voltage (240/120 V, 167 kVA and Smaller)

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Organization: IEEE - Institute of Electrical and Electronics Engineers, Inc.
Publication Date: 31 December 1992
Status: inactive
Page Count: 17
Page(s): 1 - 18
ICS Code (Transformers. Reactors): 29.180
ISBN (Electronic): 978-0-7381-3625-7
DOI: 10.1109/IEEESTD.1992.95634

Abstracts

Standard

This standard covers certain electrical, dimensional, and mechanical characteristics and takesinto consideration certain safety features of single-phase, 60 Hz, mineral-oil-immersed, self-cooled, padmounted, compartmental-type distribution transformers with high-voltage bushings. These transformers are rated 167 kVA and smaller, with high-voltages of 34500 GRD/19900 volts and below for operation between one phase and grounded neutral, and low-voltage of 240/120 volts. These transformers are generally used for step-down purposes from an underground primary cable supply.NOTE--Refer to latest federal regulations concerning polychlorinated biphenyl (PCB) contaminations in transformers.

Document History

C57.12.21-2000 - American National Standard Requirements for Pad-Mounted, Campartmental-Type, Self-Cooled, Single-Phase Distribution Transformers With High-Voltage Bushings: High Voltage (34 500 GrdY/19 920 V and Below) and Low Voltage (240/120 V, 167 kVA and Smaller)
December 31, 1992 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This standard covers certain electrical, dimensional, and mechanical characteristics and takesinto consideration certain safety features of single-phase, 60 Hz, mineral-oil-immersed, self-cooled, padmounted, compartmental-type distribution transformers with high-voltage bushings. These transformers ...

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