Active Standard

IEEE C57.12.40-2017

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)

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.

Sponsor Committee
PE/TR - Transformers
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Status
Active Standard
PAR Approval
2012-08-30
Superseding
C57.12.40-2011
Board Approval
2017-05-18
History
ANSI Approved:
2018-10-29
Published:
2017-08-31

Working Group Details

Society
IEEE Power and Energy Society
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Sponsor Committee
PE/TR - Transformers
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Working Group
STNP WGC57.12.40 - Underground TR & NW Protect - Std. Req. for Sec. Network Xfrmrs Working Group
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IEEE Program Manager
Malia Zaman
Contact
Working Group Chair
David Blew

PC57.12.40

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)

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.

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No Active Standards

C57.12.40-2006

IEEE Standard for Requirements for Secondary Network Transformers, Subway and Vault Types (Liquid-Immersed)

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.

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C57.12.40-2011

IEEE Standard for Network, Three-Phase Transformers, 2500 kVA and Smaller; High Voltage, 34 500 GrdY/19 920 and Below; Low Voltage, 600 V and Below; Subway and Vault Types (Liquid Immersed)

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.

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No Inactive-Withdrawn Standards
No Inactive-Reserved Standards
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