EMC TEST – EN 61000-4-4 – BURST Electrical Fast Transient Test Electrical Fast Transient Immunity Test
The purpose of the EMC Burst Test is to identify performance delays in electrical and electronic devices caused by short-term transitions resulting from the switching of small inductive loads or control circuits. The BURST test conducted in EMC test laboratories is performed in accordance with the harmonized standard EN 61000-4-4, which is part of the 2014/30/EC Electromagnetic Compatibility Directive. This standard establishes a common and repeatable basis for evaluating the performance of a product when exposed to electrical fast transients/bursts at power supply, signal, control, and grounding connection points. All equipment tests should be conducted in a configuration as close as possible to the installed enclosure. The equipment to be tested for EMC is placed on the Ground Reference Plane. This table provides details on the amplitude of the voltage in the open-circuit condition and the repetition rate of the impulses injected into the product.
For light industrial equipment, test level 2 (1 kV and 5 kHz) has been specified to simulate real threats, while for heavy industrial equipment, test level 3 (2 kV and 5 kHz) has been specified. The test facility has an insulation support with a height of 0.1 m. The minimum area of the CTP must be 1 m x 1 m. The ports to be tested are AC Power Supply, DC Power Supply, and Signal Lines (Signal Cables). The cables of the ports where the test is applied should be 0.5 m long. Cables exceeding 0.5 m should be bundled. The test cable should be placed separately from the product cables of other untested ports. All cables must be placed on insulation supports. During the test process, positive and negative polarized loads are applied to the equipment under test at peak values at intervals of 15 ms with a period of 300 ms, and discharge is allowed during the remaining time. The test duration is set at a total of 60 seconds. Classification is made according to where the product will be used. Classification is, in a sense, the result of the EMC test. The evaluation of immunity tests performed in accordance with Electromagnetic Compatibility Tests and Measurements is based on performance criteria. Performance criteria consist of four stages.
EMC BURST TEST
Before the performance evaluation, the operating mode of the product must be specified. During EMC tests, observations are made to determine if any changes occur. Based on the observation results, criteria are established, and the test result is determined.
