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IEEE C57.12.34-2022

$44.42

IEEE Standard Requirements for Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers, 10 MVA and Smaller; High-Voltage, 34.5 kV Nominal System Voltage and Below; Low-Voltage, 15 kV Nominal System Voltage and Below (Published)

Published By Publication Date Number of Pages
IEEE 2022 56
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Revision Standard – Active. Certain electrical, dimensional, and mechanical characteristics are set forth, as well as certain safety features of three-phase, 60 Hz, liquid-immersed, self-cooled, pad-mounted, compartmental-type distribution transformers. These transformers are rated 10 MVA and smaller, with the high-voltage limit of 34.5 kV nominal system voltage and below, and with low-voltage limit of 15 kV nominal system voltage and below. This standard covers the connector, bushing, and terminal arrangements for radial or loop-feed systems. This standard does not cover the electrical and mechanical requirements of any accessory devices that may be supplied with the transformer.

PDF Catalog

PDF Pages PDF Title
1 IEEE Std C57.12.34™-2022 Front Cover
2 Title page
4 Important Notices and Disclaimers Concerning IEEE Standards Documents
8 Participants
10 Introduction
11 Contents
12 1. Overview
1.1 Scope
1.2 Purpose
13 1.3 Word usage
2. Normative references
14 3. Definitions
4. Ratings
4.1 Kilovolt-ampere ratings
4.2 Voltage ratings
4.3 Tap ratings
15 5. Impedance voltage
5.1 Nominal percent impedance voltage
5.2 Tolerance on impedance voltage
5.3 Tolerance on impedance voltage on a tap
6. Basic lightning impulse insulation levels
17 7. Tests
7.1 General
7.2 Dielectric tests
7.3 Dielectric test levels
8. Construction
8.1 General
8.2 Compartment configuration
8.3 Access
18 8.4 Enclosure security and coating system
8.5 Pad attachment
8.6 Lifting
8.7 Connectors, bushings, and terminals
21 8.8 Instruction nameplate
8.9 Oil preservation
8.10 Tanks
8.11 Grounding provisions
22 8.12 Components for loop primary cable systems
9. Storage
10. Installation
11. Other requirements that may be specified for some applications
44 Annex A (informative) Accessories for three-phase pad-mounted transformers
A.1 General
A.2 Bail
A.3 Overcurrent protection
46 A.4 Underinsulating liquid loadbreak switches
49 A.5 Liquid-level indicating devices
50 A.6 Liquid temperature indicating devices
51 A.7 Accessory boxes
A.8 Underinsulating liquid surge arrester
52 A.9 Internal current transformer
53 A.10 Winding hot-spot monitors
54 Annex B (informative) Clarification of the horizontal angle of loading
B.1 General
55 Annex C (informative) Bibliography
56 Back cover
IEEE C57.12.34-2022
$44.42