3Com 4800G Getting Started Guide - Page 75

Lightning Protection for the Switch - com manual

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A LIGHTNING PROTECTION FOR THE SWITCH Installating the Lightning Arrester for AC Power (Socket Strip with Lightning Protection) c CAUTION: Lightning arrester will not be shipped with the switch. You should purchase it by yourself if needed. If an outdoor AC power cord should be directly led to the switch, please serially connect the lightning arrester for AC power (Socket Strip with Lightning Protection) before you plug AC power cord into the switch, thus to prevent the possible damage to the switch due to lightning strike. You can use cable clips and screws to fasten the lightning arrester for AC power on the cabinet, workbench or the wall of equipment room. Figure 69 Diagram of lightning arrester Grounding and polarity indicator (red) : On means that the lines are wrongly connected (either the ground wire is not well connected, or the live and zero lines are wrongly connected). Please check the power supply circuit. Normal operation indicator (green): On means that the arrester works normally. Otherwise, it means that the protection circuit has been damaged. Power switch Power socket (complied with IEC standard), connected to the power supply of the equipment room through power cord Mainboard Multipurpose power socket, connected to the device protected by the arrester Overload auto protector, which can be manually reset. c CAUTION: ■ Make sure that 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

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A
L
IGHTNING
P
ROTECTION
FOR
THE
S
WITCH
Installating the
Lightning Arrester for
AC Power (Socket
Strip with Lightning
Protection)
c
CAUTION:
Lightning arrester will not be shipped with the switch. You should
purchase it by yourself if needed.
If an outdoor AC power cord should be directly led to the switch, please serially
connect the lightning arrester for AC power (Socket Strip with Lightning
Protection) before you plug AC power cord into the switch, thus to prevent the
possible damage to the switch due to lightning strike. You can use cable clips and
screws to fasten the lightning arrester for AC power on the cabinet, workbench or
the wall of equipment room.
Figure 69
Diagram of lightning arrester
c
CAUTION:
■
Make sure that 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
Mainboard
Grounding and polarity indicator (red) :
On means that the lines are wrongly connected
(either the ground wire is not well connected, or the live and zero lines are wrongly connected).
Please check the power supply circuit.
Power switch
Normal operation indicator (green):
On means that the arrester works normally. Otherwise, it
means that the protection circuit has been damaged.
Multipurpose power socket, connected to the device
protected by the arrester
Power socket (complied with IEC standard),
connected to the power supply of the equipment room
through power cord
Overload auto protector,
which can be manually reset.