This part of IEC 60076 applies to lightning and switching impulse tests on power transformers and reactors.
Information is given on waveforms, test circuits including test connections, earthing practices, failure detection methods, test procedures, measuring techniques and interpretation of results.
Where applicable, the test techniques are as described in IEC 60060‑1 and IEC 60060‑2.
IEC 60076-4:2026
EN 60076-4 Ed.2.0