Installation Manual
H3C S7500 Series Ethernet Switches
Appendix C Lightning Protection
C-2
Caution:
z
Make sure that the arrester is well grounded before using the lightning arrester for
power.
z
After inserting AC power cable connector of switch into the socket of lightning
arrester, if the green LED is on and the red LED does not alarm, it means that the
lightning arrester of power is running and the function of lightning protection has
taken effect.
z
Pay adequate attention if the red LED is on. You should correctly locate the problem,
whether it is caused because the grounding cable of the arrester is not well
grounded or because the live and zero wires are connected in reverse direction.
You may check that in the following way. When the red LED is on, use a multimeter
to examine polarity at the power socket of the arrester. If it is same to that of the
power socket in the equipment room, it means that arrester is not well grounded. If it
is adverse to that of the power socket in the equipment room, it means that the
power socket of the arrester is set to the reverse polarity. In this case, you should
open the power socket of arrester to correct polarity. After that, if the red LED still
alarms, it means that the arrester is not well grounded yet.
C.2 Installation of Lightning Arrester for Network Port
Note:
Lightning arrester for network port is specially designed for the Ethernet port of
10/100M electrical interface (RJ-45 connector is adopted in this case).
Caution:
Lightning arrester for network port will not be provided along with the switch, and you
should purchase it by yourself if needed.
If an outdoor network cable should be led to the switch, please serially connect the
lightning arrester for network port before you plug this cable into the interface on the
switch, in case of the possibility that the switch may be damaged due to lightning strike.