IEC 61000-4-8 (Edition 2.0)
Electromagnetic Compatibility (EMC)- Part 4-2: Testing and measurement techniques - Power frequency magnetic field immunity test
EMC Tests are tests that check the electromagnetic compatibility of a device or system. In the Electromagnetic Compatibility Test (EMC Test), it is aimed to operate any electrical and electronic device or system without being affected by and affecting other devices or systems in the environment. EMC Test is generally examined in two categories as Immune EMC Test and Emission EMC Test. Test limit values and test methods specified in the standards used in EMC Test applications may vary according to the features of the device or system.
Power frequency magnetic field immunity test specified in IEC 61000-4-8 standard is one of the Electromagnetic Compatibility (EMC) immunity tests (EMC Test).
IEC 61000-4-8 standard covers electromagnetic compatibility (EMC) immunity rules and test methods for electrical and electronic devices exposed to mains frequency magnetic field.
The purpose of IEC 61000-4-8 standard is to provide electromagnetic immunity requirements of electrical and electronic devices, in residential areas, commercial facilities, industrial facilities, power plants, medium and high voltage stations exposed to magnetic disturbances at the network frequency. to establish a common and repeatable basis for the assessment of their work qualifications.
Power Frequency Magnetic Field Immunity Test:
The Power Frequency Magnetic Fields Immunity Test evaluates the working qualities and performance of electrical and electronic devices when they are exposed to magnetic fields at 50Hz and 60Hz frequencies.
The magnetic field created during the Power Frequency Magnetic Fields Immunity Test is expressed as A/m. 1 A/m magnetic field strength corresponds to 1.26µT free space magnetic flux density.
The Power Frequency Magnetic Fields Immunity Test levels, which are one of the Electromagnetic Compatibility Tests (EMC Test), vary according to the application time of the created field and these levels are as follows;
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Test Levels for Continuous Field
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EMC Test Level |
Magnetic Field Strength (A/m) |
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1 |
1 |
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2 |
3 |
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3 |
10 |
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4 |
30 |
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5 |
100 |
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x |
Special |
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“x” can be any level, above, below or in-between the other levels. This level can be given in the product specification. |
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Test levels for short duration: 1s to 3s |
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EMC Test Level |
Magnetic Field Strength (A/m) |
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1 |
Not Applicable |
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2 |
Not Applicable |
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3 |
Not Applicable |
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4 |
300 |
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5 |
1000 |
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x |
Special
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“x” can be any level, above, below or in-between the other levels. This level can be given in the product specification. |
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While performing the Power Frequency Magnetic Field Immunity Test, the tested device is placed on a reference ground plane and insulated from this plane with an insulating material of 0.1 m thickness.
