IEEE C57.12.90-1999

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IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers

Published By	Publication Date	Number of Pages
IEEE	1999

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Description

Revision Standard – Superseded. Superseded by IEEE Std C57.12.90-2006 A common format for data files and exchange medium used for the interchange of vari- ous types of fault, test, or simulation data for electrical power systems is defined. Sources of transient data are described, and the case of diskettes as an exchange medium is recommended.Issues of sampling rates, filters, and sample rate conversions for transient data being exchanged are discussed. Files for data exchange are specified, as is the organization of the data. A sample file is given.

PDF Catalog

PDF Pages	PDF Title
1	Title Page
3	Introduction
4	Participants
6	CONTENTS
9	1. Overview 1.1 Scope 1.2 Purpose 1.3 Word usage
10	2. References
11	3. Definitions
12	4. General 4.1 Types of tests 4.2 Test requirements 4.3 Test sequence
13	4.4 Instrumentation 5. Resistance measurements 5.1 Determination of cold temperature 5.2 Conversion of resistance measurements
14	5.3 Resistance measurement methods
15	6. Polarity and phase-relation tests 6.1 Subtractive and additive polarity
17	6.2 Polarity tests: single-phase transformers
18	6.3 Polarity and phase-relation tests: polyphase transformers
21	7. Ratio tests 7.1 General
22	7.2 Tolerances for ratio 7.3 Ratio test methods
24	8. No-load losses and excitation current 8.1 General 8.2 No-load loss test
26	8.3 Waveform correction of no-load losses
27	8.4 Temperature correction of no-load losses 8.5 Determination of excitation (no-load) current
28	9. Load losses and impedance voltage 9.1 General 9.2 Factors affecting the values of load losses and impedance voltage
29	9.3 Tests for measuring load losses and impedance voltage
35	9.4 Calculation of load losses and impedance voltage from test data
38	9.5 Zero-phase-sequence impedance
41	10. Dielectric tests 10.1 General
42	10.2 Switching impulse test procedures
44	10.3 Lightning impulse test procedures
47	10.4 Routine impulse test for distribution transformers
50	10.5 Low-frequency tests 10.6 Applied voltage tests
51	10.7 Induced voltage tests for distribution and Class I power transformers
52	10.8 Induced voltage test for Class II power transformers
53	10.9 PD measurement
54	10.10 Insulation power-factor tests
57	10.11 Insulation resistance tests
58	11. Temperature rise 11.1 Ambient temperature measurement
59	11.2 Liquid rise measurement 11.3 Average winding temperature-rise measurement
61	11.4 Other temperature measurements 11.5 Test methods
64	11.6 Correction of temperature rises for differences in altitude 12. Short-circuit tests 12.1 General
65	12.2 Test connections
66	12.3 Test requirements
67	12.4 Test procedure
68	12.5 Proof of satisfactory performance
69	13. Audible sound emissions 13.1 General
70	13.2 Instrumentation 13.3 Test conditions
72	13.4 Microphone positions
73	13.5 Sound power rating
77	13.6 Presentation of results
78	14. Calculated data 14.1 Reference temperature 14.2 Losses and excitation current 14.3 Efficiency
84	14.4 Voltage regulation of a constant-voltage transformer
85	15. Certified test data
88	Annex A—Bibliography