Thank you! I had heard about the tests in the USSR but didn’t know what kind of damage it did.
There was other damage in that test not reported on Wiki. From memory, they had problems with simple diesel generator failures. They found the varnish had broken down on the windings. The breakdown occurred at holidays (reduced or poor coatings). This should be a concern for those who think they immune to EMP with older vehicles or simple gensets. As I recall (could be wrong) these were in line of site but not connected.