Kris,
If you pull a copy of Impulse generators for testing
low voltage equipment from the IEEE PES Surge Protective
Devices Committee (SPDC) Website.
http://pes-spdc.org/sites/default/files/Impulse_generatorsaddedrev2.pdf
Figure 12 of the document shows the typical 1.2/50-8/20
combination wave generator output waveshape variation with
external resistance for zero to 20 ohms.
As the resistance increases the peak current amplitude
decreases and the 8/20 short-circuit waveshape moves towards
1.2/50. Things get more complicated when the load is not a
pure resistance.
Mick
On 03/05/2013 14:26, Carpentier Kristiaan wrote:
Hi group,
A combination wave surge generator gives a 1.2/50 voltage
waveform and an 8/20 short-circuit current at the output
of the generator with no CDN connected.
What happens with this current waveform when the output is
not a real short-circuit but has a certain series
resistance/impedance (5, 10, ...ohm): Will the waveform
become longer in time or will only the current level
decrease, or both?
Thanks,
Kris
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