1 - AS 2732-1984 GUIDE TO THE LIGHTNING IMPULSE AND SWITCHING IMPULSE TESTING OF POWER TRANSFORMERS AND REACTORS
4 - PREFACE
5 - CONTENTS
7 - 1. Scope
7 - 2. General
8 - 3. Specified wave-shapes
8 - 4. Test circuit
9 - 5. Calibration
10 - 6. Lightni ng impulse tests
10 - 6.1 Wave-shapes
10 - 6.2 Impulses chopped on the tail
10 - 6.2.1 Time to chopping
11 - 6.2.2 Rate of collapse and amplitude of reversed polarity of the chopped impulse
11 - 6.3 Terminal connections of the test object and methods of failure detection
12 - 6.4 Test procedures
12 - 6.5 Oscillographic recording
12 - 6.5.1 General
13 - 6.5.2 Recording of voltage
13 - 6.5.3 Recording of current
14 - 7. Switchi ng impulse tests
14 - 7.1 Special requirements
14 - 7.2 Transformers
14 - 7.2.1 Wave-shapes
14 - 7.2.2 Terminal connections of the test object and methods of failure detection
15 - 7.2.3 Test procedures
16 - 7.2.4 Oscillographic recording
17 - 7.3 Reactors
17 - 7.3.1 Wave-shapes
17 - 7.3.2 Terminal connections of the test object and methods of failure detection
17 - 7.3.3 Test procedures
17 - 7.3.4 Oscillographic recording
18 - 8. Interpretation of oscillograms
18 - 8.1 Lightning impulse
18 - 8.1.1 Voltage oscillograms - Full-wave tests
19 - 8.1.2 Current oscillograms - Full-wave tests
20 - 8.1.3 Voltage and current oscillograms - Chopped-wave tests
20 - 8.2 Switching impulse
20 - 8.2.1 Voltage oscillograms
20 - 8.2.2 Current oscillograms
25 - APPENDIX A - PRINCIPLES OF WAVE-SHAPE CONTROL
25 - A1. High impedance windings
26 - A2. Low impedance windings
30 - APPENDIX B - TYPICAL OSCILLOGRAPHIC RECORDS
31 - SUMMARY OF EXAMPLES ILLUSTRATED IN OSCILLOGRAMS
31 - Lightning impulse tests
31 - Switching impulse tests