AXOS
5
Compact immunity test System 7
Inside the AXOS, there are filter capacitors connected between L-PE and N-PE, as required by the
standard.
These capacitors will cause a residual current, which will trip the residual current circuit breaker.
Hence, an isolation transformer needs to be inserted between main power supply and "EUT Supply Input" as shown in
Figure 4-1 below.
Figure 4-1: Transformer connection
Note:
N and PE need to be connected as shown in the figure. This enables that a possible follow current from the mains can
be delivered to the EUT.
All further equipment connected after the isolation transformer are not protected any more by the residual
current circuit breaker.
4.5 Connection to EUT
The L, N and PE banana sockets on the front panel are the outputs of the integrated single-phase CDN.
For power line testing, the EUT is connected here.
There are three banana-plugs (non-stackable) delivered with the standard accessories set:
- black: line conductor
- blue: neutral conductor
- green: protection earth conductor
These banana plugs shall be mounted on a suitable connection cable.
4.6 V dip Input
The "V dip" input is used to supply voltage having XX% level for Dips testing.
For example, for testing 40% Dips level, 92V supply need to be connected between "V dip" and neutral
(at nominal voltage 230V).
In case of interrupt testing i.e. 0% Dips test level, "V dip" must be connected to "N" (neutral) input, using
the purple coloured safety banana cable supplied with the standard accessories
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