Hardware Installation and Reference Guide Appendix C — Lightning Protection
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Appendix C — Lightning Protection
Installing AC Power Arrester (lightning protection cable row)
The external lightning protection cable row shall be used on the AC power port to prevent the switch from being struck by lightning
when the AC power cable is introduced from the outdoor and directly connected to the power port of the switch. The lightning
protection cable row is fixed on the cabinet, operating table or the wall in the machine room using the line buttons and screws.
Figure C-1 Schematic Diagram for the Power Arrester
The power arrester is not provided and the user shall purchase it to address the practical requirement.
Precautions for installation:
Make sure that the PE terminal of the power arrester has been well-grounded;
After connecting the switch AC power plug to the socket of the power arrester (lightning protection cable row), lightning
protection function implements if the RUN LED is Green and the ALARM LED is OFF.
If the ALARM LED on the power arrester is Red, you shall check what the reason is, poor grounding connection or the reversed
connection of the Null and Live lines: Use the multimeter to check the polarity of the power socket for the arrester when the
LED is Red, if the N line is on the left and the L line is on the right, the arrester PE terminal is not grounded; if the L line is on the
left and the N line is on the right, the polarity of the arrester power cable shall be reversed; if the LED is still Red, it is confirmed
that the arrester PE terminal has not been grounded.
Installing the Ethernet Port Arrester
During the switch usage, the Ethernet port arrester shall be connected to the switch to prevent the switch damage by lightning before
the outdoor network cable connects to the switch.
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