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The European edition of the impulse magnetic field immunity test is used mainly for equipment installed in buildings with an external lightning protection system or with a structural steel frame that acts as a natural down conductor, and for apparatus mounted on masts or on overhead line structures. In European practice the test appears most often in the sector standards for substation automation and for railway fixed installations, where the field produced by a lightning current flowing in the structure must not disturb control and protection equipment. The European text reproduces the international waveform of 1.2 by 8 microseconds and the large rectangular coil used to encompass the equipment, and it carries the foreword and annex that give it its status under the directive. The three-axis orientation and the number and spacing of impulses required by the standard are frequently the points on which a test report is challenged, so the record of the test conditions is as important as the result.

EN 61000-4-9 standard satisfiable test: Multifunction Immunity Tester 、 Surge Immunity 。
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