EMC-PARTNER CDN2000-06-25 User Manual page 8

CDN2000-06-25 coupling decoupling network
ANSI / IEEE; IEC 61000-4-12
CWG versus Ring wave
The ring wave appears at the terminals of equipment (equipment ports) as a consequence of switching in
power and control lines, as well as a consequence of lightning. The single event type and the decaying
oscillatory waveform are the most significant parameters of this test.
Ring Wave Generator
S
Test generator
Legend:
RL Charging resistor
MS Measuring equipment
RM Shunt
TM Dividers
8/54
Household
Equipment
e.g. PC
Secondary
Protection
Cs Impulse capacitor
Lp Inductance of the generator
Lv Inductance of the connection
Cp Parallel capacitor
i
Primary
Protection
Lightning
Figure: 1.0.2-1
Figure: 1.0.2-2
S High voltage switch
Rs Serial resistor
R1-3 Current limiting resistors