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IEEE C57.12.40-2017

Current Revision

IEEE Standard for Network, Three-Phase Transformers, 2500 kVA and Smaller; High Voltage, 34 500 V and Below; Low Voltage, 600 V and Below; Subway and Vault Types (Liquid Immersed)

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Revision Standard - Superseded. This standard is intended for use as a basis for establishing the performance, interchangeability, and safety of the equipment covered and to assist in the proper selection of such equipment.
This standard covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of three-phase, 60-Hz, liquid-immersed, self-cooled, network transformers with a primary grounding switch. These transformers are rated 2500 kVA and below with high voltages of 34 500 volts and below and secondaries of 600 volts and below. These transformers are generally used for step-down purposes from underground primary cables and supply a secondary network system through network protectors. These transformers are typically installed below ground level.
This standard is intended for use as a basis for establishing the performance, electrical and mechanical interchangeability, safety of the equipment covered, and to assist in the proper selection of such equipment.

SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number C57.12.40
Publication Date Aug. 31, 2017
Language en - English
Page Count 37
Revision Level
Supercedes
Committee Transformers
Publish Date Document Id Type View
Aug. 31, 2017 C57.12.40-2017 Revision
Jan. 25, 2012 C57.12.40-2011 Revision
Sept. 15, 2006 C57.12.40-2006 Revision
Dec. 31, 2000 C57.12.40-2000 Revision