Lightning impulse and chopped wave LI tests are the highest peak value dielectric tests, those intended to verify the insulation integrity for stresses caused by atmospheric overvoltages and transients.
Welcome to the seventh e-lesson in the transformer testing course, where we will focus on the topic of lightning impulse testing. This is a crucial test that verifies a transformer’s capability to withstand fast-rising transients, typically associated with lightning strikes. You will learn about the standardized waveform requirements, the key test equipment involved, and the proper test connections for different winding configurations. The test procedure, including the sequence of impulses, will be covered, as well as the evaluation and interpretation of the test results. At the end, we will gauge your interest in a deeper dive into this subject matter for a potential follow-up lesson. Let’s begin exploring the fundamentals of lightning impulse testing for power transformers.
Content of this lesson is fully vendor agnostic, but it is sponsored by Ganz!
