EM TEST UCS 500 Series
Operating Manual V 3.05 25 / 57
9.2. Burst generation
Discharge switch:
The discharge switch is a highly reproducible semiconductor switch. Spike frequencies up to 1000kHz are by a
factor of 200 higher than recommended in the actual EFT standards. This means of course that also the pulse
energy would be 200 times higher. This is not generally possible for the high voltage switch. Therefore the
following limitation protects the pulse forming circuit against overload:
M4 Type
Voltage U max. pulse / burst
td * f
max. pulse / s
td * f / tr
< 1'500V 1,000 10,000
>= 1'500V < 2'500V 1,000 linear decrease to 5,000
>= 2'500V linear decrease to 500 linear decrease to 1,500
M6/M6A Type
Voltage U max. pulse / burst
td * f
max. pulse / s
td * f / tr
< 4'000V 100 1,000
>= 4'000V < 5'000V linear decrease to 88 linear decrease to 750
>= 5'500V linear decrease to 75 linear decrease to 500
9.3. Test level with Burst as per IEC 61000-4-4 Ed.2.
Burst generators, which the specifications in accordance with. IEC 61000-4-4 Ed2: 2004 fulfills, have a limitation
of the maximum output voltage. The efficiency of the Burstpuls decreases with the numbers of couplings.
Therefore the maximum test level is limited by the number of coupling on several lines.
Generators with the modification in accordance with IEC 61000-4-4 Ed2: 2004 the. max. test levels have the
following limits:
Coupling UCS 500 >Vers.3.0
UCS 500M4 >Vers.3.0
UCS 500M6 >Vers.3.0
UCS 500M6A >Vers.3.0
UCS 500M6B
50 Ω
4400V 5500V 5500V
1 coupling any 4400V 5500V 5500V
2 couplings any 4400V 5000V 5000V
3 couplings any 4400V 5000V 5000V
Generator with
CNI 503 / CNE 503
UCS 500 >Vers.3.0
UCS 500M4 >Vers.3.0
UCS 500M6 >Vers.3.0
UCS 500M6A >Vers.3.0
UCS 500M6B
50 Ω
4400V 5500V 5500V
1 coupling any 4400V 5500V 5500V
2 couplings any 4000V 5000V 5000V
3 couplings any 4000V 5000V 5000V
4 couplings any 4000V 4500V 4500V
5 couplings any 4000V 4500V 4500V
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