wind power generating system SPD 1,wind power generating system surge protection device 2,In=20KA, Imax=40KA 3,IEC61643-1 wind power generating system SPD1,wind power generating system surge protection device2,In=20KA, Imax=40KA3,IEC61643-1 Uc=1000V ACIn=20KAImax=40KAUp≤ 2.5KV