EM TEST
UCS 500 Series
Operating Manual
V 5.40
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10.3.2.
Coupling to I / O lines
The coupling to I/O lines is generally realized with other
coupling networks than for power supply lines. The loading
of the I/O lines with big coupling capacitors is mostly not
possible. The data transmission may be disturbed.
For coupling to I/O lines special couplers as per IEC 61000-
4-5 are available, such as the CNV 504N- and the
CNV 508N-series for four respectively for eight wire
systems.
For many application a special coupling network is required.
Danger
Using coupling networks CNV series
Switch OFF the high voltage during
manual change of the coupling
10.4. Test set-up
According to the specifications of IEC 61000-4-5, the surge generator has a source impedance of 12ohm when
the simulator is coupled between the lines and protective earth.
This will activate fault current detectors or protectors which may be installed in the laboratory.
Therefore it is important
- not to disconnect the surge simulator form protective earth (power cable)
- to have an installation where the simulator is connected via its ground reference connector to earth
