Hello Dave,
This is a basic standard. Does a product family standard exist that gives
any additional information?
We have products that fall under the scope of EN 50130-4 with similar
requirements. Although there is a slight difference in the method of
application, the requirements are essentially the same.
Notice that each EUT in the diagram is placed on an insulating barrier from
ground. Notice the surge signal path -- from the surge generator to the
chassis of EUT 1 through the shield of the cable to the chassis of EUT 2 to
ground. The significant condition of the test is that the surge signal is
passing through the shield creating a coupling to the conductors contained
within that cable. These conductors usually terminate in some sort of
protection circuitry in each EUT. The point of the test is to see what
effect occurs to the equipment under test (specifically at these conductor
ports) as a result of the coupling from the shield. This same principle
would also apply to other areas where coupling could take place such as the
chassis to sensitive nearby circuitry as the surge current travels from the
generator through conductive chassis to shield to chassis to ground.
Hope this helps,
Don Umbdenstock
Sensormatic
> --
> From: Dave Wilson[SMTP:dwil...@alidian.com]
> Reply To: Dave Wilson
> Sent: Friday, September 28, 2001 1:28 PM
> To: 'emc-p...@ieee.org'
> Subject: Surges on shielded lines
>
>
> I'm trying to get surge testing done on a DS3 interface against
> EN61000-4-5.
> According to the standard, the test set-up in figure 13 should be used.
> The
> figure shows the test generator connecting to the chassis - can someone
> confirm that is how the test is done - i.e. the surge is applied to the
> chassis, and hence the shield?
>
> Thanks in advance,
>
> Dave Wilson
> Alidian Networks
>
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