Standard: IEEE - ANSI C57.12.20

OVERHEAD-TYPE DISTRIBUTION TRANSFORMERS 500 KVA AND SMALLER: HIGH VOLTAGE, 34 500 V AND BELOW; LOW VOLTAGE, 7970/13 800Y V AND BELOW

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Scope:

This standard covers certain electrical, dimensional, and mechanical characteristics and safety features of single- and three-phase, 60-Hz, mineral-oil-immersed, self-cooled, overhead-type distribution transformers 500 kVA and smaller, high voltages 34 500 V and below and low voltages 7970/13 800Y V and below.

Purpose

This standard is intended for use as a basis for determining the performance, interchangeability, and safety of overhead-type distribution transformers and to assist in the proper selection of this equipment.

Organization: The Institute of Electrical and Electronics Engineers, Inc.
Document Number: ansi c57.12.20
Publish Date: 2011-06-16
Page Count: 55
Available Languages: EN
DOD Adopted: NO
ANSI Approved: NO
Most Recent Revision: YES
Current Version: YES
Status: Active

Document History

Document # Change Type Update Date Revision Status
ANSI C57.12.20 Change Type: INT Revision: 05 Status: INAC
ANSI C57.12.20 Change Type: INT Update Date: 2008-04-01 Revision: 05 Status: INAC
ANSI C57.12.20 Change Type: Update Date: 2005-06-09 Revision: 05 Status: INAC
ANSI C57.12.20 Change Type: Revision: 4 Status: INAC
ANSI C57.12.20 Change Type: Update Date: 1997-01-01 Revision: 97 Status: INAC
ANSI C57.12.20 Change Type: Update Date: 1997-01-01 Revision: 97 Status: INAC
ANSI C57.12.20 Change Type: Update Date: 1988-01-01 Revision: 88 Status: INAC
ANSI C57.12.20 Change Type: Update Date: 1981-01-01 Revision: 81 Status: INAC
ANSI C57.12.20 Change Type: Revision: 74 Status: INAC
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