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IEEE C57.18.10-2021

IEEE C57.18.10-2021

$56.33

IEEE Standard Practices and Requirements for Semiconductor Power Rectifier Transformers

Published By Publication Date Number of Pages
IEEE 2021 93
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Revision Standard – Active. Practices and requirements for semiconductor power rectifier transformers for dedicated loads rated single-phase 100 kW and above and three-phase 100 kW and above are included. Static precipitators, high-voltage converters for dc power transmission, and other nonlinear loads are excluded. Service conditions, both usual and unusual, are specified, or other standards are referenced as appropriate. Routine tests are specified, and an informative annex provides several examples of load loss calculations for transformers when subjected to nonsinusoidal currents, based on calculations provided in the standard.

PDF Catalog

PDF Pages PDF Title
1 Front cover
2 IEEE Std C57.18.10™-2021 Title page
4 Notice and Disclaimer of Liability Concerning the Use of IEEE Standards Documents
5 Translations
Official statements
Comments on standards
Laws and regulations
Data privacy
Copyrights
6 Photocopies
Updating of IEEE Standards documents
Errata
Patents
IMPORTANT NOTICE
7 Participants
9 Introduction
11 Contents
13 1. Overview
1.1 Scope
1.2 Word usage
14 2. Normative references
15 3. Definitions
4. Symbols
17 5. Service conditions
5.1 Usual service conditions
5.1.1 General
5.1.2 Operation above or below rated voltage or frequency
5.1.3 Voltage harmonics
5.2 Unusual service conditions
5.2.1 General
5.2.2 Loading at other than rated load
5.2.2.1 Liquid-immersed rectifier transformers
18 5.2.2.2 Dry-type rectifier transformers
5.2.3 Unusual temperature and altitude conditions
5.2.4 Other unusual service conditions
5.2.5 Transformers energized from a converter/inverter
5.2.6 Short-circuit considerations
19 6. Rating data
6.1 General
6.2 Taps on rectifier transformers
6.3 Cooling classes of transformers
6.4 Frequency
6.5 Phases
6.6 Rated kVA
6.6.1 Line kVA rating
6.6.2 RMS kVA rating
20 6.6.3 Fundamental kVA rating
6.6.4 Auxiliary KVA rating
6.7 Compensation on rectifier transformers
6.8 Rated current
6.8.1 General
6.8.2 RMS rated current method
21 6.9 Connections
6.9.1 General
6.9.2 Phase shifts
6.10 Polarity, angular displacement, and lead markings
6.10.1 Polarity of single-phase rectifier transformers
22 6.10.2 Angular displacement between voltages for polyphase transformers
6.10.3 Connection and marking of terminals for rectifier transformers
6.11 Impedance
6.11.1 Percent impedance of a rectifier transformer
6.11.2 Commutating impedance
6.12 Losses
6.13 Temperature rise and insulation system capability
23 6.14 Nameplates
6.14.1 General
6.14.2 Nameplate information
25 7. Construction
7.1 General
7.2 Mounting and location
7.2.1 Portable mining-type rectifier transformer
7.2.2 Lifting, jacking, and/or skidding
26 7.3 Tanks
7.3.1 Finish
7.3.2 Bracing
7.4 Method of coolant preservation
7.5 Grounding
7.6 Connections for shipping
7.7 Accessories
7.7.1 General
7.7.2 Liquid-immersed transformers
7.7.3 Dry-type transformers
7.8 Electrostatic ground shield
27 7.9 Interphase transformers
7.9.1 General
28 7.9.2 Submittal information for internal interphase transformers
7.9.3 Submittal information for external interphase transformers
29 8. Testing and calculations
8.1 General
8.2 Routine tests
8.3 Symbols used in tests
8.4 Resistance measurement
30 8.5 Dielectric tests
8.6 Excitation losses
8.7 Load losses
8.7.1 Introduction
8.7.2 General
8.7.3 Test and calculations required for load loss tests
33 8.7.4 Loss tests for special rectifier transformer connections
35 8.7.5 Load losses in interphase transformers, anode paralleling reactors, and commutating reactors
36 8.8 Losses in interphase transformers
8.8.1 Excitation losses
8.8.2 Load losses
8.9 Impedance tests
8.9.1 Transformer impedance
8.9.2 Determination of transformer commutating reactance
8.9.2.1 General
8.9.2.2 Direct method 1
37 8.9.2.3 Indirect method 2
8.10 Ratio tests
8.11 Temperature rise test
8.11.1 General
38 8.11.2 Dry-type transformers
8.11.2.1 General
8.11.2.2 Core loss
8.11.2.3 Load loss
8.11.3 Liquid-immersed transformers
8.11.3.1 General
8.11.3.2 Load loss method A
8.11.3.3 Load loss method B
39 8.11.4 Other
8.12 Short-circuit tests
40 8.13 Polarity and phase relation
8.13.1 General
8.13.2 Polarity
8.13.3 Phase relation
8.13.3.1 Phase relation tests
8.13.3.2 Test for phasor diagram
8.13.3.3 Phasor diagrams
8.13.3.4 Limitations
8.13.3.5 Separate neutrals
9. Tolerances
9.1 Tolerances for ratio
41 9.2 Tolerances for impedance
9.3 Tolerances for losses
10. Figures and tables
10.1 Introduction
42 10.2 Figures
58 10.3 Tables
67 Annex A (informative) Bibliography
69 Annex B (informative) Harmonic loss calculation examples
B.1 Determination of transformer load losses under distorted load current
71 B.2 Three-winding transformer loss calculations
84 Annex C (informative) Historical record
85 Annex D (informative) Other IEEE/IEC rectifier/inverter transformer standards
86 Annex E (informative) High resistance ground (HRG) systems
87 Annex F (informative) Non-traditional harmonic spectrums
F.1 Introduction
F.2 Multi-phase rectifiers and motor drives
90 Annex G (informative) Rectifier transformer monitoring
91 Annex H (informative) Inverter transformer voltage harmonics
92 Annex I (informative) External interphase transformer dielectric tests
I.1 Frequency and wave shape of test voltage
I.2 Duration of application of dielectric tests
I.3 Voltage for dielectric tests
93 Back cover

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