Simulates low frequency, high-energy electrical transients on power lines and long distance I/O lines (such as telephone lines) coupled from nearby lightning strikes.
Test Method
Test is applied to AC and DC power ports. The open circuit signal wave-shape has as 1.2µs rise time and 50µs hold time. Surges are applied in common mode (line-to-ground) and in differential mode (line-to-line). All surges are synchronized to the 0°, 90°, 180° and 270° phase angles of the AC voltage. DC power ports are not tested if they are connected to an AC-DC power adapter, in which case the AC-DC adapter should be submitted for testing.
Test levels for the residential, commercial and light industrial generic standard are 2kV common mode and 1kV differential mode on AC power lines. For DC power lines, the test levels are 0.5kV for both differential and common mode. Although the test is not currently required for the heavy industrial generic standard, it suggests test levels of 4kV common mode and 2kV differential mode.