AudioCodes MediaPack, Руководство по установке

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Version 6.0 27 March 2010
Installation Manual 2. Installing the Device
2.2.4.1 Power Surge Protection and Grounding of MP-124
This section discusses power surge protection and grounding of MP-124.
Warning:
•
Ensure that you connect MP-124 to an electrical socket outlet that
provides protective earthing (grounding). Prior to connecting power, refer
to the Regulatory Information provided in the
User’s Manual .
•
The MP-124 is immune against power surge levels of up to 1 Kilovolts
(KV) as required by the following standards: IEC 61000-4-5, EN 55024,
and EN 300386.
•
For installations where wires are routed outside the building, the
Telecommunication site must comply with ETS 300-253 “Earthing and
Bonding of Telecommunication Equipment in Telecommunication
Centers”.
•
Power surges above protection levels as required by EN 55024/EN
300386 may cause damage to MP-124.
•
MP-124 provides only Secondary Protection against power surges. In
deployments where the telephone lines are installed outside, you must
install Primary Protection against lightning. Only lightning protectors
recommended by AudioCodes must be used - specifically, manufactured
by Circa. Failing to install Circa primary surge protectors, failing to comply
with the grounding instructions or any other installation instructions, may
cause permanent damage to MP-124.
•
As most of the installation is the responsibility of the customer,
AudioCodes can assume responsibility for damage only if the customer
can establish that MP-124 does not comply to the standards specified
above (and MP-124 is within the hardware warranty period).
Lightning is the transient passage of electrical current between a cloud and the surface of
the earth. Part of the lightning current can be carried inside a building from electrical lines
and analog and/or digital telephone lines located outside. This direct injection of lightning
current inside a building can cause significant damage to electronic circuits and equipment.
To protect MP-124 from these power surges, the MP-124 must be connected to an external
lightning protector. You must use a lightning protector of the type CIRCA 4B1FS-240
manufactured by CircaTelecom (
http://www.circatelecom.com ). The connection must be
made using the terminal fixture of the type CIRCA 2625QC/QC.
This fixture must be connected alongside or within the Main Distribution Frame (MDF). You
must connect the grounding connection of this electrical cabinet to the grounding bus of the
electrical circuit board, using AWG wires of at least 10mm
2
and maximum length of 3
meters.
The MP-124 must be connected to the power surge protector using minimum 26-AWG wire
thickness.
The MP-124 must be installed in the Telecommunication rack. The MP-124 grounding
screw must be connected to the equipotential grounding bus bar located in the
Telecommunication rack, using a wire of 6mm
2
surface wire. This line must be connected to
the equipotential bus bar of the electrical circuit board located in the Telecommunication
room, using a stranded cable with surface area of 25 mm
2
. The length of this cable must
be as short as possible; no longer than 3 meters.