Hardware Installation and Reference Guide
Appendix C Lightning Protection
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Appendix C Lightning Protection
Installing AC Power Arrester (Lightning Protection Power Strip)
The AC power port must be connected to an external lightning protection power strip to prevent the switch from being
struck by lightning when the AC power cord is introduced from the outdoor and directly connected to the power port of
the switch. The lightning protection power strip can be fixed on the cabinet, workbench, or wall in the equipment room b y
using cable ties and screws. AC power enters the lightening protection power strip and then gets to the switch.
Figure C-1 Power Arrester
Grounding and polarity detection indicator: If the
indicator is red, cable connection is incorrect (the
ground cable is not connected, or the N and L lines are
reversely connected). Check your power supply line.
Normally running indicator: When the
indicator is green, the circuit is working
properly. Otherwise, the protective circuit is
damaged.
Installed electronic circuit board
Multi-purpose sockets (connected to the power
supply of the switch)
Overload auto-protector, which
can be reset manually
IEC standard socket, which is
connected to the power supply
in the equipment room through
the power cable
Power switch
The power arrester is not delivered with the switch. Please purchase it based on actual requirements.
Precautions:
Make sure that the PE terminal of the power arrester is well grounded.
After the AC power plug of the switch is connected to the socket of the power arrester (lightning protection power
strip), the lightning protection function is implemented only if the RUN indicator is green and the ALARM indicator is
OFF.
If the ALARM indicator on the power arrester is red, check whether it is caused by poor grounding connection or by
the reversed connection of the Null and Live lines. The detection method is as follows: Use a multimeter to measure
the polarity of the power socket for the arrester when the indicator is red. If the N line is on the left and the L line is
on the right (facing the socket), the arrester's PE terminal is not grounded. If not, the polarity of the arrester power
cord should be reversed. In this case, you should open the power arrester and rectify the polarity of the connection.
If the indicator is still red, the arrester's PE terminal has not been grounded.
Installing the Ethernet Port Arrester
