IEC 60076-4:1976

FOREWORD
1 Scope
2 Normative references
3 General
4 Specified waveshapes
5 Test circuit
6 Calibration
7 Lightning impulse tests
   7.1 Waveshapes
   7.2 Impulses chopped on the tail
   7.3 Terminal connections and applicable methods of
        failure detection
   7.4 Test procedures
   7.5 Recording of tests
8 Switching impulse tests
   8.1 Special requirements
   8.2 Transformers
   8.3 Reactors
9 Interpretation of oscillograms or digital recordings
   9.1 Lightning impulse
   9.2 Switching impulse
10 Digital processing, including transfer function analysis
11 Impulse test reports
Annex A (informative) Principles of waveshape control
Annex B (informative) Typical oscillograms and digital
        recordings
Figures
Table B.1

Provides guidance and explanatory comments on the existing procedures for lightning and switching impulse testing of power transformers to supplement the requirements of IEC 60076-3.