BS EN 61000-4-8:2010 Electromagnetic compatibility (EMC). Testing and measurement techniques. Power frequency magnetic field immunity test
BS EN 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.
BS EN 61000-4-8 does not consider disturbances due to capacitive or inductive coupling in cables or other parts of the field installation.
The object of BS EN 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).
The standard defines:
– Recommended test levels
– Test equipment
– Test set-up
– Test procedure.
Contents of BS EN 61000-4-8:
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Test levels
6 Test equipment
6.1 General
6.2 Test generator
6.2.1 Current source
6.2.2 Characteristics and performances of the test generator for different inductive coils
6.2.3 Verification of the characteristics of the test generator
6.3 Inductive coil
6.3.1 Field distribution
6.3.2 Characteristics of the inductive standard coils 1 m × 1 m and 1 m × 2,6 m
6.3.3 Characteristics of the inductive coils for table top and floor standing equipment
6.3.4 Measurement of the inductive coil factor
6.4 Test and auxiliary instrumentation
6.4.1 Test instrumentation
6.4.2 Auxiliary instrumentation
7 Test set-up
7.1 Test set-up components
7.2 Ground (reference) plane for floor standing equipment
7.3 Equipment under test
7.4 Test generator
7.5 Inductive coil
8 Test procedure
8.1 General
8.2 Laboratory reference conditions
8.2.1 General
8.2.2 Climatic conditions
8.2.3 Electromagnetic conditions
8.3 Carrying out the test
9 Evaluation of the test results
10 Test report
Annex A (normative) Inductive coil calibration method
Annex B (normative) Characteristics of the inductive coils
Annex C (informative) Selection of the test levels
Annex D (informative) Information on power frequency magnetic field strength
Bibliography
