IEC: 61000-4-28 (Ed-1.2)-2009-04;Electromagnetic compatibility (EMC)-Part 4-28: testing and measurment otechniques - variation of power fequency, immunity test for equpment with input current not exeeding 16 A per phase  International Electrotechnical Commission 

 - Geneva  IEC  2009 
 - 32 
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