... power supply system 2.1,2,3,4(+NPE) 3.IEC61643-1,GB18802.1 Product Features1.Plug in/out style surge protective ... Scope and Installation PositionLY3-C series surge protective device is applicable for B grade lightning-proof, installed on the joint of ... protectors the electric network not shocked by the thunder and lightning, These series usually installed in household distribution boards, computer ...