NZM B1£ºIn = 40~125 A NZM B2£ºIn = 125~250 A
   •  Ir = 32 ... 250 A  
           32~250A Á½ÖÖÍâÐÎ³ß´ç  
           100A ͬÀà²úÆ·ÖÐÌå»ýС
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   •  ´Ó32ÖÁ250A£¬¹²2¸ö¿ò¼Ü
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            Ir = 0,8...1 x Iu
            Ii = 6...10 x Iu