标题: 求教大神怎么理解IEC61000-4-4第7.3.2.2章节中“direct injection” [打印本页] 作者: jansle_happy 时间: 2022-3-22 17:17 标题: 求教大神怎么理解IEC61000-4-4第7.3.2.2章节中“direct injection” 求教大神怎么理解IEC61000-4-4第7.3.2.2章节中“direct injection”，谢谢。, d; t! Q! _% z! N1 ?, {4 N" o
If a suitable coupler/decoupler is not available, e.g. for a.c. mains currents >100 A, alternative methods can be employed, as follows: . ^2 h+ V$ K/ a+ E in case of common and unsymmetric modes, direct injection using the (33 ± 6,6) nF capacitors is the preferred coupling mode; * `# y+ d, e q# s6 R3 z1 J, P if direct injection is not practical, the capacitive clamp is used. ! x4 a" C9 w4 B3 H# r* B- p6 v) J" b3 t0 D$ V) z- F