Hardware Installation and Reference Guide Appendix C Lightning Protection
Appendix C Lightning Protection
Installing AC Power Arrester (lightning protection cable row)
The external lightning protection cable row should 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. AC enters the lightening protection cable row and then gets to the switch.
Figure C-1 Schematic Diagram for the Power Arrester
The power arrester is not provided and the user should 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 the switch AC power plug is connected 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 should check whether it is caused by poor grounding
connection or by 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 (facing the
socket), 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 by the power arrester; if the LED is still Red, it is confirmed that the
arrester PE terminal has not been grounded.
