ANSI C57.12.40 : 2011
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Hardcopy , PDF
09-15-2006
English
01-01-2011
Foreword
1 Scope
2 Referenced and related American National Standards
2.1 Referenced American National Standards
2.2 Related American National Standards
3 Transformer performance requirements
3.1 Kilovolt-ampere ratings
3.2 Voltage ratings and tap ratings
3.3 Angular displacement
3.4 Basic lightning impulse insulation levels
3.5 Percent impedance
3.6 Audible sound levels
4 Tests
5 Primary disconnect and grounding switch
5.1 General
5.2 Primary switch electrical performance requirements
5.3 Primary switch mechanical features
5.4 Primary switch accessory equipment
5.5 Primary cable entrance
6 Construction
6.1 General
6.2 Corrosion resistance
6.3 Tank
6.4 Accessory equipment for transformer tanks
6.5 Dimensions
7 Bushings
7.1 Primary bushings
7.2 Secondary bushings
7.3 Terminal markings
8 Neutral termination
8.1 Primary neutral
8.2 Secondary neutral
9 Nameplate
10 Connections of transformer for shipment by the
manufacturer
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