Hardware Installation
10. Appendix B Switch Lightning Protection
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APPENDIX B SWITCH 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 B-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 socket), 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
