67
8.4 Combination wave (Surge) parameter setting
The surge test generates high voltage pulses as specified in the international
standards EN/IEC 61000-4-5.
8.4.1 Test configuration for power line coupling
Test pulses are injected directly into the EUT power supply lines as they pass
through the mains CDN’s. The EUT obtains its power from the EUT power outlet
on the front panel of the CDN where the mains voltage has the interference
signal superimposed on it.
8.4.2 Test configuration for external coupling
In this mode, the interference pulses are switched to the surge Hi and Lo output
sockets on the front panel, to which an external data line signal coupler can be
connected. By using such an external signal coupler it is possible to superim-
pose the interference signal, as specified in the standards, on communication
cables and other kinds of data lines.
The same coaxial HV output sockets may also be used for connection to all
other CDNs.
Front time T1 = 1.67 x T = 1.2 µs ± 30%
Time to half value T2 = 50 µs ± 20%
Wave shape of open circuit voltage (1.2/50 μs), wave shape definition according
to IEC/EN 61000-4-5.
1.0
0.8
0.5
0.3
0.1
T
2
max 30%
T
T1
t
Содержание NSG 3040
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