IEEE C57.123 2010

$54.17

IEEE Guide for Transformer Loss Measurement

Published By	Publication Date	Number of Pages
IEEE	2010	49

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Description

Revision Standard – Active. Information and general recommendations of instrumentation, circuitry, calibration, and measurement techniques of no-load losses (excluding auxiliary losses), excitation current, and load losses of power and distribution transformers are provided. The guide is intended as a complement to the test code procedures given in Clause 8 and Clause 9 of IEEE Std C57.12.90.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C57.123-2010 front cover
3	Title page
6	Introduction Notice to users Laws and regulations Copyrights Updating of IEEE documents
7	Errata Interpretations Patents Acknowledgments
8	Participants
10	Contents
11	Important Notice 1. Overview 1.1 Scope
12	1.2 Purpose 2. Normative references 3. Transformer no-load losses 3.1 General
13	3.2 Parameters affecting magnitude of no-load losses 3.2.1 Induction 3.2.2 Excitation voltage magnitude 3.2.3 Excitation voltage waveform
15	3.2.4 Core configuration 3.2.5 Core material 3.2.6 Joint type
16	3.2.7 Core size 3.2.8 Frequency 3.2.9 Workmanship 3.2.10 Core temperature 3.2.11 Impulse tests
17	3.2.12 Core stabilization 3.2.13 Short-circuit testing 3.3 Excitation current (no-load current)
18	3.4 Test requirements
19	3.5 Measurement of no-load losses 3.5.1 Measuring circuit 3.5.2 Waveform correction
21	3.5.3 Impact of a high source impedance
23	3.6 Measurement of excitation current
24	3.7 Measuring circuitry for three-phase transformers 3.7.1 Three-wattmeter connections
25	3.7.2 Two-wattmeter method (not recommended) 3.7.3 Voltmeter connections
28	4. Transformer load losses 4.1 General
29	4.2 Measuring circuitry 4.3 Load-loss measurement uncertainties
31	4.4 Corrections to measured load losses 4.4.1 Phase-angle correction of a conventional load-loss measuring system
34	4.4.2 Magnitude correction 4.4.3 Correction for losses due to the shorting connection
37	4.4.4 Special precautions
39	4.5 Measuring circuitry for three-phase transformers 4.5.1 Three-wattmeter method
40	4.5.2 Two-wattmeter method (not recommended) 4.5.3 Test of three-phase transformer with single-phase voltage
41	4.5.4 Bridge method
42	5. Advanced measuring systems 5.1 Enhanced conventional system 5.2 Advanced voltage and current transducers
43	6. Specified tolerances on losses 6.1 Specified tolerances on no-load losses
44	6.2 Specified tolerances on total losses
45	7. Traceability and calibration
46	8. Grounding, shielding, and safety 8.1 Grounding 8.2 Shielding
47	8.3 Safety
48	Annex A (informative) Bibliography