SANS / IEC 61000-4-8


Power Frequency Magnetic Field Immunity

SANS / IEC 61000-4-8


The scope of SANS / IEC 61000-4-8 relates to the immunity requirements of equipment, only under operational conditions, to magnetic disturbances at power frequencies 50 Hz and 60 Hz related to:

  • Residential and commercial locations
  • Industrial installations and power plants
  • Medium voltage and high voltage sub-stations

The applicability of SANS / IEC 61000-4-8 to equipment installed in different locations is determined by the presence of the phenomenon, as specified in Clause 4. This standard does not consider disturbances due to capacitive or inductive coupling in cables or other parts of the field installation. The object of SANS / IEC 61000-4-8 is to establish a common and reproducible basis for evaluating the performance of electrical and electronic equipment for household, commercial and industrial applications when subjected to magnetic fields at power frequency (continuous and short duration field)..

SANS / IEC 61000-4-8 is intended to demonstrate the immunity of equipment when subjected to power frequency magnetic fields related to the specific location and installation condition of the equipment (e.g. proximity of equipment to the disturbance source). The power frequency magnetic field is generated by power frequency current in conductors or, more seldom, from other devices (e.g. leakage of transformers) in the proximity of equipment.

Typical levels

  • Continuous
    1, 3, 10, 30A/m
  • Short duration (1-3s)
    300 or 1000A/m