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H3C S3100-SI Series Ethernet Switches
Chapter 4 Lightning Protection
of the Switch
4-3
Caution:
z Make sure that the arrester is well grounded before using the
lightning arrester for power.
z After inserting AC power cord plug 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 ground wire
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.