
Installation Manual
H3C S7502 Ethernet Switch
Appendix A Installation of Lightning Arrester for AC Power
(Lightning Protection Grounding Strip)
A-2
Caution:
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Make sure that the arrester is well grounded before using the lightning arrester for
power.
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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, the lightning
arrester of power is running and the function of lightning protection has taken effect.
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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.