What is a Power Frequency Magnetic Field Immunity Test?

The power frequency magnetic field immunity test is one of the basic EMC (Electromagnetic Compatibility) test items. The magnetic field waveform is a power frequency sine wave. The test equipment includes a test generator, induction coil, grounding plate, etc. The test magnetic field is generated by the current injected into the induction coil. The reference grounding plate is connected to the safety ground of the laboratory. The test sample is placed on the reference grounding plate with a 0.1m thick insulating material in between. The current generator for the test should be placed no more than 3 meters away from the coil, with one end connected to the reference grounding plate.

China's JJR Laboratory is a professional testing institution, offering power frequency magnetic field immunity tests and a range of other testing services to customers.

Purpose of the Test 

The power frequency magnetic field immunity test, also known as the power frequency magnetic field immunity detection or test, is designed to evaluate the performance of electronic and electrical equipment when subjected to disturbances from such magnetic fields.

Advantages of the Test 

All equipment in the EMC/Electromagnetic Compatibility testing laboratory is selected from leading international manufacturers such as Germany's R&S, Switzerland's EMTEST, and the USA's AR, providing robust hardware support to ensure the accuracy of test results. Currently, the EMC laboratory has a 3-meter standard semi-anechoic chamber, three shielded rooms, two sets of electromagnetic disturbance testing systems, two electromagnetic immunity testing systems, one wireless communication equipment testing system, and multiple other testing devices, offering one-stop EMC testing services. The EMC laboratory has been accredited with qualifications such as CMA and CNAS.

Applications 

Information technology equipment, optoelectronics, communication equipment, marine equipment, rail transit equipment, power equipment, industrial, scientific, medical equipment, light and heavy industrial equipment, lighting devices, household appliances, and more.

Test Standards 

IEC 61000-4-8: 2001 Electromagnetic Compatibility - Testing and Measurement Techniques - Power Frequency Magnetic Field Immunity Test.