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
Learn More - Status
- Superseded Standard
- PAR Approval
- 2007-03-22
- Superseded by
- C57.12.40-2017
- Superseding
- C57.12.40-2006
- Board Approval
- 2011-12-07
- History
-
- Published:
- 2012-01-25
Working Group Details
- Society
- IEEE Power and Energy Society
Learn More - Sponsor Committee
- PE/TR - Transformers
Learn More - Working Group
-
STNP WGC57.12.40 - Underground TR & NW Protect - Std. Req. for Sec. Network Xfrmrs Working Group
Learn More - 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.
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.
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.
No Inactive-Withdrawn Standards
No Inactive-Reserved Standards