1055497-1 Datasheet, PDF (12/320 Pages) Tyco Electronics – RF Coax Products

RF Coax Connectors
Lightning and EMP Protection Devices
Product Facts
■ Cellular operator protection
against EMP (electro-
magnetic pulses) caused
by lightning strikes
■ Two different categories:
Surge protectors and
Quarter wave stub tuners
■ For use in cellular infra-
structure including GSM,
DCS 1800, and PCS 1900
systems
■ Incorporates Gas Discharge
Tube (GDT) technology
Tyco Electronics has devel-
oped a unique series of
Lightning and EMP protec-
tion devices for use in cellu-
lar infrastructure including
GSM, DCS 1800, and PCS
1900 systems. These
devices are designed to
offer the cellular operator
protection against EMP
(electro-magnetic pulses)
caused by lightning strikes.
Direct or even near strikes
produce fast rising electric
fields within micro-seconds.
These fields generate high
voltage pulses through
unprotected antennas and
transmission lines which
lead to the primary commu-
nication equipment. High
voltage pulses can cause
extensive damage leading
to costly repairs as well as
significant loss of service to
subscribers. These protec-
tive devices come in two
different categories: surge
protectors and quarter wave
stub tuners.
To ensure that proper, low
level contact resistance is
established between the LP
device and mounting wall, it
is recommended that a min-
imum torque of 50 in/lbs /
5.65 n/m be applied to
tighten the connector
mounting nut. A recom-
mended minimum torque of
35 in/lbs / 3.95 n/m should
also be applied for installa-
tion of replacement surge
protector capsules to
ensure proper protection
performance.
In order to ensure that
resultant currents from light-
ning or EMP strikes do not
interfere with parallel
transmission lines within
protected electronic equip-
ment, surge protector
devices must be installed
with proper orientation.
The surge protector side
of the device should be
mounted in the unprotected
side of the equipment while
the mounting nut is posi-
tioned internally in the
protected area.
It is important when plan-
ning lightning protection,
that the user can estimate
the potential number of
direct strikes. This informa-
tion may influence the type
of device selected or the
requirement for routine
maintenance checks.
Significant attention must be
paid to the height of sup-
porting structure as this,
when related to the typical
number of thunderstorms in
a particular region, allows
us to estimate the probabil-
ity of a direct strike taking
place. To assist our cus-
tomers in this, the following
table and chart has been
included in this note. This
should enable lightning pro-
tection planners to establish
the likelihood of direct
strikes across a network
anywhere in the world.
Detailed application notes
are available for proper
selection of lightning pro-
tection devices (surge pro-
tectors & stub tuners) as
well as intermodulation and
White Bronze plating.
Selecting your RF Coaxial
Lightning Protection Device
Between Series Adapters
For 7-16 Series and N Series Between
Series Adapters, please see pages
251-260.
Number of Thunderstorm
Days per year
05
10
15
20
30
40
50
70
90
130
150
180
hmax/m
10%
28
18
14
12
9.4
7.9
6.9
5.6
4.8
3.9
3.5
3.1
hmax/m
20%
39
26
20
17
13
11
9.5
8.0
7.0
5.5
5.0
4.4
hmax/m
50%
61
40
31
26
20
17
15
12
10.6
8.5
7.7
6.9
Table 1: Maximum height of supporting building for a given number of thunderstorm days (when hmax is exceeded,
probability of direct strike to supporting building within 15 years is greater than 10% for hmax values given in second
column, 20% for hmax values given in third column and 50% for hmax values given in the fourth column).
12
Catalog 1307191
Revised 3-07
www.tycoelectronics.com
Dimensions are in millimeters
and inches unless otherwise
specified. Values in brackets
are standard equivalents.
Dimensions are shown for
reference purposes only.
Specifications subject
to change.
USA: 1-800-522-6752
Canada: 1-905-470-4425
Mexico: 01-800-733-8926
C. America: 52-55-1106-0803
South America: 55-11-2103-6000
Hong Kong: 852-2735-1628
Japan: 81-44-844-8013
UK: 44-8706-080-208