Surge events can be generated by lightning phenomena, switching transients or the
activation of protection devices in the power distribution system. A surge itself is
inuenced by the propagation path taken so that impulses from the same event may
have different forms depending upon where a measurement is taken. Combination
Wave Generators (CWG) simulate a surge event in power lines close to or within
buildings. Mostly the disturbances are tolerable because they are single events.
3
IEC/EN 61000-4-4 Electric Fast Transients, EFT/Burst
Industrial measurement and control equipment nearly always use conventional
control units containing relays or other electro-mechanical switching devices.
Fluorescent lamp ballast units, insufciently suppressed motors (hair dryers, vacuum
cleaners, drills, etc.) are found everywhere in the public power supply. All of these are
primarily inductive loads which generate interference when switched on or off. EFT
events, can cause microprocessor units to malfunction or reset, with corresponding
disruption to normal operation.
IEC/EN 61000-4-11 Voltage Dips and Interrupts
Voltage failures occur following switching operations, short-circuits, response of
fuses and when running up heavy loads. The quality of the electrical power supply is
increasingly becoming a central topic of discussion. The interference sources in the
mains, caused by electronic power control with non-linear components e.g. thyristors
are used more frequently in domestic appliances such as hotplates, heating units,
washing machines, television sets, economy lamps, PCs and industrial systems with
speed-controlled drives.
IEC/EN 61000-4-9 Pulsed Magnetic Field
Under normal operating conditions, an AC current generates a steady magnetic eld
so that equipment, such as monitors, close to AC power lines could suffer interference.
Under fault conditions, a sudden high current level can result in a short duration magnetic eld. Lightning strokes or short circuit fault currents in the power network can
generate high level short duration magnetic elds.
4
AXOS SERIES
THE STANDARDS
IEC/EN 61000-4-12 Ring Wave / IEEE C62.41
Ring waves are used to simulate lightning or switching effects in domestic
single or three phase supplies within an adequately protected building.
The waveform has similar characteristics in both open and short circuit
conditions. The ring wave is characterised as a bipolar damped oscillating
wave.
Telecommunication networks and lines are often disposed to lightning strikes
and their associated effects. All telecommunication systems linked with lines in-
Expandable Test Systems
THE MODULAR CONCEPT
Welcome to the unique design and concept of modularity designed by HAEFELY.
HAEFELY is recognizing an increasing interest in testing departments to congure the
required functions in compact immunity test systems more exible than ever. For that
reason HAEFELY designed a unique concept of modularity which eviscerates large
additional investments for customers in the future.
Moreover, constantly reduced product development times call for powerful, easy-to-
operate and ready-to-use conducted immunity test systems which can be expanded in
a multitude of different test applications. Customer requirements, particularly in the
telecommunications and industrial electronics sector, emphasize a test system‘s accuracy and modularity, thus clearly pointing to easy to expand T&M equipment that
is favourably priced and suitable for most of industries.
5
The new AXOS series has been tailored to exactly meet these requirements, offering
special cost advantages for T&M applications in the development, production and
servicing of telecommunications, components as well as safety and industrial electro-
nics.
All AXOS test systems come equipped with all the hardware needed for instant upgrades
by only entering optional key codes into the licence code manager of the unit. After
entering the key code(s) the additional test functionalities like Surge Combination
Wave, Ring Wave, Telecom Wave, EFT/Burst or Voltage Dips and Interrupts become
available immediately. No direct intervention has to be done by the user at all.
License Manager of the AXOS series
6
AXOS SERIES
AXOS5 EXPANDABLE TEST SYSTEM
5
The new AXOS
alone test systems into one single economic solution.
It can be individually combined either with 5 kV Surge Combination Wave, 5 kV EFT/Burst,
Dips & Interrupts, along with an integrated single-phase coupling / decoupling network. This
allows quick and completely automated testing to the most common IEC, EN, ANSI, IEEE and
UL standards.
expandable test system integrates all of the best features of several stand-
5
The AXOS
can either be operated via front panel by large colour graphic interface or
remotely from the PC. The easy to use menu together with the availability of predefined
test routines for different standards makes testing easy and reliable, even for less fre-
quently users.
Numerous additional functions such as external start/stop function allows easy integration of
the test system also in customer specic test environments.
All the test parameters can be varied in a broad range wide above the requirements of the
standards. Together with the ability of changing test parameters during test, AXOS5 is not
only the ideal product for compliance and pre-compliance testing, it is useful for monitoring
& debugging function during design phase as well.
A wide range of cost-efcient and user friendly coupling / decoupling networks for power
lines as well as for symmetrical and asymmetrical data- and signal lines are available as
options.
AXOS5 front view
AXOS
5
rear view
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