IEC: 60947-6-1-1989 Amendment No. 2-1997; Low voltage Switchgear Part 6: multiple Function equipment Sec. 1:Automatic transfer switching equipment.

IEC: 60947-6-1-1989 Amendment No. 2-1997; Low voltage Switchgear Part 6: multiple Function equipment Sec. 1:Automatic transfer switching equipment. - Geneva I.E.C. 1997 - 15

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