BS EN 61000-4-12:2017 Electromagnetic Compatibility (EMC) Testing and measurement techniques. Ring wave immunity test

Electrical testing
Electrical impedance
Waves
Voltage
Electromagnetic fields
Electrical equipment
Electric power system disturbances
Oscillations
Test equipment
Circuits
Waveforms
Electromagnetic compatibility
Electronic equipment and components
Testing conditions
Performance testing
Wave properties and phenomena
Electromagnetic radiation
Electronic power supplies

Link: BS EN 61000-4-12:2017 Electromagnetic Compatibility (EMC) Testing and measurement techniques. Ring wave immunity test
Source: BSI Standards