ANSI C57.12.24 : 2009
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
TRANSFORMERS - UNDERGROUND-TYPE THREE-PHASE DISTRIBUTION TRANSFORMERS, 2500 KVA AND SMALLER; HIGH VOLTAGE, 34 500 GRDY/19 920 VOLTS AND BELOW; LOW VOLTAGE, 480 VOLTS AND BELOW - REQUIREMENTS
Hardcopy , PDF
08-14-2009
English
01-01-2009
Foreword
1 Scope
2 References
3 Ratings
3.1 Kilovolt-ampere ratings
3.2 Voltage ratings and tap ratings
4 Insulation levels
5 Impedance
5.1 Percent impedance
5.2 Impedance tolerance
5.3 Tolerance on impedance on a tap
6 Tests
6.1 General
6.2 Reference temperature
7 Construction
7.1 General
7.2 Bushings and terminals
7.2.1 Electrical characteristics
7.2.2 Neutral terminal connection
7.3 Accessory equipment and marking requirements
7.3.1 Liquid-level marking
7.3.2 Lifting provisions
7.3.3 Terminal marking
7.3.4 Nameplate
7.3.5 Tap changer
7.4 Tanks
7.4.1 General
7.4.2 Covers
7.4.3 Handholes
7.4.4 Ground provisions
7.4.5 Finish
7.5 Audible sound levels
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