Hardware Installation and Reference Guide Appendix B Surge Protection
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Appendix B Surge Protection
Installing the AC Power Arrester (Surge Protection Cable Row)
The external surge protection cable row must 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 surge protection cable row is fixed on the cabinet, operating table, or the wall in the equipment room using the line
buttons and screws.
Figure B-1 Schematic Diagram for the Power Arrester
The power arrester is not provided and customers have to purchase it.
Precautions for installation:
Ensure that the PE terminal of the power arrester is properly grounded.
After connecting the switch AC power plug to the socket of the power arrester (surge protection cable row), surge
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, check whether there is the poor grounding connection or reversed
connection of null and live lines. You can 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 is reversed. If the LED
is still red, the arrester PE terminal is not grounded.
Installing the Ethernet Port Arrester
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