IEEE C57.12.10 2011

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IEEE Standard Requirements for Liquid-Immersed Power Transformers

Published By	Publication Date	Number of Pages
IEEE	2011	58

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Description

New IEEE Standard – Active. This standard sets forth the requirements for power transformer application. This standard is intended to be used as a basis for performance, interchangeability, and safety of the equipment covered and to assist in the proper selection of such equipment. This document is a product standard that covers certain electrical, dimensional, and mechanical characteristics of 50 Hz and 60 Hz, liquid-immersed power transformers and autotransformers. Such power transformers may be remotely or integrally associated with either primary switchgear or substations, or both, for step-down or step-up purposes and base rated as follows: 833 kVA and above single-phase, 750 kVA and above three-phase. This standard applies to all liquid-immersed power transformers and autotransformers that do not belong to the following types of apparatus: instrument transformers, step voltage and induction voltage regulators, arc-furnace transformers, rectifier transformers, specialty transformers, grounding transformers, mobile transformers, and mine transformers. An errata is available at http://standards.ieee.org/findstds/errata/C57.12.10-2010_errata.pdf

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C57.12.10™-2010 Front cover
3	Title page
6	Introduction
7	Notice to users Laws and regulations Copyrights Updating of IEEE documents Errata Interpretations Patents
8	Participants
10	Contents
11	Important notice 1. Overview 1.1 Scope
12	1.2 Mandatory requirements 2. Normative references
13	3. Definitions 4. Rating data 4.1 Usual service conditions 4.2 Kilovoltampere ratings
15	4.3 Voltage ratings 4.4 Insulation levels 4.5 Taps
16	4.6 Impedance voltage
17	4.7 Top-liquid temperature-range limits 4.8 Routine tests 5. Construction 5.1 Accessories
23	5.2 Bushings
25	5.3 Lifting, moving, and jacking facilities
27	5.4 Nameplate
28	5.5 Ground pads 5.6 Polarity, angular displacement, and terminal markings
29	5.7 Liquid preservation system
31	5.8 Tanks
32	5.9 Auxiliary cooling equipment
33	5.10 Power supply for transformer auxiliary equipment and controls
34	5.11 Terminal board 5.12 Junction boxes 5.13 Disconnecting switches with interlocks and terminal chambers
35	5.14 Throat connection 5.15 Current transformers
36	5.16 Surge arresters 5.17 Other insulating liquid 5.18 Loading
37	5.19 “Other” tests 6. LTC equipment—Basic construction features 6.1 Load tap changer (LTC) 6.2 Tap selector switch
38	6.3 Motor and drive mechanism 6.4 Position indicator
39	6.5 Control equipment and accessories
46	Annex A (informative) LTC considerations
58	Annex B (informative) Bibliography