IEEE 389 1997

$67.71

IEEE Recommended Practice for Testing Electronics Transformers and Inductors

Published By	Publication Date	Number of Pages
IEEE	1997	81

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Description

Revision Standard – Active. A number of tests are presented for use in determining the significant parameters and performance characteristics of electronics transformers and inductors. These tests are designed primarily for transformers and inductors used in all types of electronics applications, but they may apply to the other types of transformers of large apparent-power rating used in the electric power utility industry.

PDF Catalog

PDF Pages	PDF Title
1	Title Page
3	Introduction Participants
5	CONTENTS
9	1. Overview 1.1 Scope 1.2 Transformers and inductors
10	2. References
11	3. Definitions 4. How to specify electronics transformers 5. Insulation and corona tests 5.1 General
15	5.2 Electric strength test (hi-pot test)
16	5.3 Induced potential test
18	5.4 Corona tests
21	6. DC resistance tests 6.1 General 6.2 Resistance values under 1 ½—Kelvin double-bridge method
22	6.3 Resistance values from 1 ½ to many kilohms
25	6.4 Digital ohmmeter—Resistance values from under 1 ½ to many kilohms
26	7. Loss measurements 7.1 No-load loss
30	7.2 Excitation apparent-power measurements 7.3 Stray-load losses
32	7.4 Short-circuit power test
33	7.5 Efficiency and power factor
34	8. Ratio of transformation 8.1 General
36	8.2 Measurement methods
37	8.3 Impedance unbalance
39	8.4 Balance tests 8.5 Polarity tests
41	9. Transformer capacitance 9.1 General
42	9.2 Interwinding capacitance
43	9.3 Distributed capacitance
44	9.4 Bridge methods 10. Inductance measurements by impedance bridge method 10.1 General
45	10.2 Method of measurement
49	11. Transformer response measurements 11.1 Transformer frequency response
51	11.2 Transformer pulse response
53	12. Noise tests 12.1 Test conditions for audible noise 12.2 Measurement of audible noise
54	13. Terminated impedance measurements 13.1 General 13.2 Return-loss method
56	14. Temperature rise tests 14.1 Test methods
57	14.2 Notes on the technique of measurement
58	15. Self-resonance 15.1 General 15.2 Measurement
59	16. Voltage-time product rating 16.1 General
60	16.2 Recommended voltage-time product test methods
61	17. Shielding 17.1 Electrostatic shielding
65	17.2 Magnetic shielding 18. Measurement of quality factor Q 18.1 Definition
66	18.2 Methods 18.3 Bridge measurements 18.4 Q-Meter measurements
67	18.5 Transmission method
68	18.6 Damped oscillation method
71	19. Common-mode rejection test
72	20. Inrush-current evaluation and measurement 20.1 Measurement 20.2 Calculation
73	20.3 Other considerations
74	21. Current transformer test 21.1 General 21.2 Recommended test procedure for current-transformation ratio and phase angle
75	22. Bibliography
77	Annex A—Instrumentation for voltage and current measurements on inductors and transformers
79	Annex B—AC High-potential dielectric testing
81	Annex C—An ac magnetic filed pickup probe