Appendix D Lightning Protection Of The Switch; Installation Of Lightning Arrester For Ac Power (Socket Strip With Lightning Protection) - H3C S5120-EI series Installation Manual

Appendix D Lightning protection of the switch

Installation of lightning arrester for ac power (socket
strip with lightning protection)
Make sure the arrester is well grounded before using the lightning arrester for power.
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.
Pay adequate attention if the red LED is on. 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 might verify 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 as 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, 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.
Figure 53 Diagram of lightning arrester
(1) Working LED (green) On means the circuit is working normally; off means the circuit is damaged.
53