Specifications

44
RF SOLUTION-CITEL
Telephone and data network surge protectors
Introduction
Telecommunications and data transmission devices (PABX,
modems, data terminals etc..) are becoming increasingly
vulnerable to lightning-induced voltage surges.
These devices are becoming more complex and are currently
connected to several networks : this situation increases the risk for
these sensitive devices to be stressed by destructive surge
voltages, induced by lightning or by electrical switching operations.
Moreover, these devices are nowadays installed at every level
of every installation (industry and business buildings,
residential houses and buildings), making their possible
disturbances unacceptable or/and costly.
To make this telecom or data equipment sufficiently reliable,
the installation of dedicated surge protectors, against
transient overvoltages, are highly recommended.
Surge protectors for telecom and data transmission terminals
could be divided in 3 types :
󳀏Surge protectors for telecom networks
󳀏Surge protectors for industrial networks
󳀏Surge protectors for LANs
These ranges are different by their electrical diagrams and
their mechanical configurations, adapted to the need of each
type of network.
Reminder :
Devices connected to telecom or data networks, are also
connected to the AC distribution network : in order to ensure
a relevant protection, surge protectors must be also used on
these supply networks.
Protecting telecommunication equipment
Telecom devices (PABX, Modems, Terminals..) are specially
exposed to lightning surges. CITEL offers a range of surge
protectors dedicated to the main types of telecommunication
networks.
●
Mechanical configurations
Surge protectors for telecom network are designed to fit with
existing installation. So, the CITEL surge protectors are
available in different versions to allow :
󳀏Mounting on telecom MDF
󳀏Mounting on DIN rail
󳀏Insertion in connection strips
󳀏Wall mounting
󳀏Plug-in on termination outlets
The decision to use surge protection could be taken by
simplified risk assessment (see
<< Risk analysis >> paragraph),
or by detailed risk assessment (as the one included in IEC
61643-22 standard), or by specific installation conditions as :
Protecting industrial networks
Industrial installations, business or smart buildings are packed
with amazing and increasing quantity of measurement,
control, supervision equipment.
These systems are built with controllers cards, probes, sensors
and various sensitive electronic components: any problem of
operation on these systems will involve more or less serious
consequences on the safety or the productivity of the installations.
Thus, it is increasingly vital to guarantee a relevant level of
reliability to these systems: this can be obtained by installing
surge protectors adapted with datalines or fieldbus of the
sensitive terminals.
●
Equipment to be protected
Industrial or business installations are equipped with many
different types of sensitive terminals, which must be
protected against transient voltages, as:
󳀏Industrial process equipment
󳀏
SCADA systems (Supervisory Control And Data Acquisition )
󳀏Transmission systems
󳀏I/O cards
Lines
Voltage
Diagram
Nominal Residual
Switched telephone /ADSL 170 V 210 V Standard protection
Leased lines 24 V 35 V Enahanced protection
ISDN, T2 primary access 06 V 15 V
Enhanced Protection
Low capacitance
ISDN, T0 primary access 48V 62V Enhanced protection
Conditions Recommendation
External telecom lines Systematic protection
Lines downstream PABX Protection in long or inter-building lines
Existing AC surge protector Systematic protection