Test procedure according to IEC 801, Part 4 – A test of susceptibility to fast electrical transients (bursts) causing interference on lines. The test values are divided into 5 levels:
Level Mains line Data and control lines
1 0.5 kV 0.25 kV
2 1.0 kV 0.5 kV
3 2.0 kV 1.0 kV
4 4.0 kV 2.0 kV
X special special