Karel DS200, Техническое справочное и монтажное руководство

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114
Distance definition Distance
(meters) Recommended positioning
Exchange –internal distribution frame Back of the cabinet
Internal dist. frame – 1
st
external dist.
frame
At least 20 meters
1
st
external dist. frame – 2
nd
external
dist. frame
They may be close.
Exchange – Alarm panel It should be placed close to the cabinet.
Exchange - PC It may be placed 1 m. away from the
exchange.
Exchange – External Modem It may be placed close the exchange.
Exchange – Hub or Switch It may be at most 80 meters.
Exchange - DDF It should be as close as possible.
DDF- HDSL Modem It should be as close as possible.
Exchange – Battery Group It is recommended that they be in separate
rooms.
Exchange – Regulator They should be in separate rooms.
Exchange – Generator They should be in separate rooms.
Exchange – Grounding installation See section I.1.D
Exchange – Electrical distribution frame A single phase is to be connected to the
exchange.
Determining types of protection to be applied to analog lines of the exchange is also
extremely important, for it directly affects the structure of the distribution frame.
Use of gas discharge tubes (also called spark gaps), would be necessary in order to protect
the exchange from effects of over-voltage, like thunder. Use of Fuse-10 Protection Module
would be another necessity in order to protect the exchange from variations in 220 VAC or
effects of over-current. As for the gas discharge tubes, MDF with connection module and
protection magazines should be employed. On the other hand, using MDF with connection
module for the 220 VAC Fuse-10 Protection Module would suffice. While planning, both
protection units should be projected in the plan to be deployed at least 20 meters away from
the exchange. The fuse that is to be employed on the 220 VAC Fuse-10 Protection Module
must be 100 mA delayed type fuse.
Gas tube type protection should be applied for the first external distribution frame, which is
closer to the exchange; while 220 VAC Fuse-10 Protection Module should be employed for
the second external distribution frame, which is far from the exchange. Should that order fails
to be followed, unfavorable results might occur.
*
THE 220 VAC FUSE-10 PROTECTION MODULE MUST DEFINITELY BE
INSTALLED IN THE DISTRIBUTION FRAME THAT IS FURTHEST FROM
THE EXCHANGE AND GAS DISCHARGE TUBES MUST BE PLACED IN
THE DISTRIBUTION FRAME THAT IS BETWEEN THE 220 VAC FUSE-10
PROTECTION MODULE AND THE EXCHANGE.
*
OTHERWISE, UNFAVORABLE RESULTS MIGHT OCCUR
.