IEEE DRAFT C57.12.40 : D4 2006
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
SECONDARY NETWORK TRANSFORMERS, SUBWAY AND VAULT TYPES (LIQUID IMMERSED)
18-10-2023
12-01-2013
Introduction
1 Overview
1.1 Scope
1.2 Purpose
2 References
3 Transformer performance requirements
3.1 Kilovolt-ampere ratings
3.2 Voltage rating 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
Annex A
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