Inactive-Withdrawn Standard

IEEE C57.12.21-2000

American National Standard Requirements for Pad-Mounted, Compartmental-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)

This standard covers certain electrical, dimensional, and mechanical characteristics and takes into 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.

Sponsor Committee
PE/TR - Transformers
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Status
Inactive-Withdrawn Standard
PAR Approval
1991-06-27
History
ANSI Approved:
1995-01-03
Published:
1992-12-31

Working Group Details

Society
IEEE Power and Energy Society
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Sponsor Committee
PE/TR - Transformers
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No Active Projects
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No Superseded Standards
No Inactive-Withdrawn Standards
No Inactive-Reserved Standards
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