EMC-PARTNER IMU4000, User Manual, Page: 89 / 104

EMC PARTNER AG
89/104
13.1.3 Definition of the SURGE Waveform
EMV Generator und Impulsform:
Prüfling EUT ist eine Black Box
hochohmig
niederohmig
C
S
Rp1 Rp2
Rs Ls
CWG Combination Wave Generator
100%
50%
50%
100%
90%
90%
10%
30%
50µs±20%
20µs±20%
1,2µs±30%
Spannung offener Kreis
Strom im Kurzschluss
8µs±20%
With this information the SURGE circuit of the IMU4000 can be easily verified.
Example: "Voltage"
- choose 1 kV charging voltage
- measure the no load voltage at the generator output. Check whether the wave-form is within the tolerances
or not.
Surge voltage front time T1=1.2 µs ±30%
0.84 - 1.56 µs
Time to half value T2= 50 µs ±20% 40 - 60 µs
measure Umax.
Example "Current"
- choose 1 kV charging voltage
- measure the short circuit current at the generator output. Check whether the waveform is within the
tolerances or not.
Surge current front time T1= 8 µs ±20%
6.4 - 9.6 µs
Time to half value T2=20 µs ±20% 16 - 22 µs
measure Imax
Check the source impedance:
Umax / Imax = 2 Ohm ±10%
Voltage at no load
high ohmic value
low ohmic value
Current at short circuit