IEEE C57.12.00-2021(Redline)

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IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers (Redline)

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IEEE	2021

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Description

Revision Standard – Active. Electrical and mechanical requirements for liquid-immersed distribution and power transformers, and autotransformers and regulating transformers; single-phase and polyphase, with voltages of 601 V or higher in the highest voltage winding, are set forth. This standard is a basis for the establishment of performance, and limited electrical and mechanical interchangeability requirements of equipment are described; it is also a basis for assistance in the proper selection of such equipment. The requirements in this standard apply to all liquid-immersed distribution, power, and regulating transformers except the following: instrument transformers, step voltage and induction voltage regulators, arc furnace transformers, rectifier transformers, specialty transformers, grounding transformers, mobile transformers, and mine transformers.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C57.12.00™-2021 Front Cover Developed by the
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
7	Participants
9	Introduction
10	Contents
12	1. Overview 1.1 Scope 1.2 Purpose
13	1.3 Word usage 2. Normative references
14	3. Definitions 4. Service conditions 4.1 Usual service conditions
16	4.2 Loading at other-than-rated conditions
17	4.3 Unusual service conditions
18	5. Rating data 5.1 Cooling classes of transformers
20	5.2 Frequency 5.3 Phases
21	5.4 Rated kilovoltamperes
22	5.5 Voltage ratings and taps 5.6 Connections 5.7 Polarity, angular displacement, and terminal marking
23	5.8 Impedance 5.9 Total losses 5.10 Insulation levels
31	5.11 Temperature rise and loading conditions
33	5.12 Nameplates
39	6. Construction 6.1 Bushings 6.2 Transformer accessories 6.3 Bushing current transformers
40	6.4 Thermometer wells
41	6.5 Tank pressure requirements 6.6 Liquid insulation system
42	6.7 Grounding 6.8 Minimum external clearances of transformer live parts
46	7. Short-circuit characteristics 7.1 Requirements
52	7.2 Components 7.3 Base kilovoltamperes
54	7.4 Calculation of winding temperature during a short circuit
55	8. Testing and calculations 8.1 General 8.2 Routine, design, and other tests for transformers
59	8.3 Additional routine tests on transformers with load tap changing or regulating transformers
60	8.4 Determination of transformer regulation 8.5 Determination of thermal duplicate temperature-rise data 8.6 Frequency conversion of transformer performance parameters (50/60 Hz)
61	8.7 Certified test data
62	9. Tolerances 9.1 Tolerances for ratio
63	9.2 Tolerances for impedance 9.3 Tolerances for losses 9.4 Accuracies required for measuring losses
64	10. Connection of transformers for shipment
65	Annex A (informative) Cooling class designations
66	Annex B (informative) Front-of-wave test levels
68	Annex C (normative) Audible sound pressure levels for no-load and load noise of liquid-immersed power and distribution transformers
71	Annex D (informative) Bibliography
74	Back Cover

Additional information

Standard Title	IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers (Redline)
Published Code	IEEE
Publication Date	2021

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IEEE C57.12.00-2021(Redline)

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