Installation ManualH3C S5100-SI/EI Series Ethernet Switches Appendix A Lightning Protection of the SwitchA-1Appendix A Lightning Protection of the SwitchA.1 Installation of Lightning Arrester for AC Power (SocketStrip with Lightning Protection)Caution:Lightning arrester will not be shipped with the switch. You should purchase it byyourself if needed.If an outdoor AC power cord should be directly led to the switch, please serially connectthe lightning arrester for AC power (Socket Strip with Lightning Protection) before youplug AC power cord into the switch, thus to prevent the possible damage to the switchdue to lightning strike. You can use cable clips and screws to fasten the lightningarrester for AC power on the cabinet, workbench or the wall of equipment room.MainboardGrounding and polarity indicator (red) :On means that the lines are wrongly connected(either the ground wire is not well connected, or the live and zero lines are wrongly connected).Please check the power supply circuit.Power switchNormal operation indicator (green):On means that the arrester works normally. Otherwise, itmeans that the protection circuit has been damaged.Multipurpose power socket, connected to the deviceprotected by the arresterPower socket (complied with IEC standard),connected to the power supply of the equipment roomthrough power cordOverload auto protector,which can be manually reset.Figure A-1 Diagram of lightning arrester