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Standard

IEEE C57.12.21-2000

Withdrawn
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Abstract

New IEEE Standard - Inactive-Withdrawn. 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.

Document information

  • Standard from IEEE
  • Published:
  • Document type: IS
  • Pages
  • Publisher IEEE
  • Distributor IEEE
  • ICS 29.180
  • Technical Committee IEEE Power and Energy Society / Transformers

Product Relations

  • Refers: ANSI C57.12.90-1987, American National Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers and Guide for Short-Circuit Testing of Distribution and Power Transformers.
  • Refers: ANSI C57.12.28-1988, American National Standard for Switchgear and Transformers—Pad-Mounted Equipment—Enclosure Integrity.
  • Refers: ANSI C57.12.00-1987, American National Standard Requirements for Overhead-Type Distribution
  • Refers: ANSI C57.12.70-1978 (Reaff. 1987), American National Standard Terminal Markings and Connections for Distribution and Power Transformers.
  • Refers: Transformers, 500 kVA and Smaller; High-Voltage, 34,500 Volts and Below; Low Voltage, 7970/13800 Y Volts and Below.
  • Refers: ANSI C57.12.80-1978, American National Standard Terminology for Power and Distribution Transformers.
  • Refers: ANSI C57.12.20-1988, American National Standard Requirements for Overhead-Type Distribution Transformers, 500 kVA and Smaller; High-Voltage, 34,500 Volts and Below; Low-Voltage, 7970/13800 Y Volts and Below.