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7.3 Combination wave (Surge) parameter setting
The surge test generates high voltage pulses as specified in the international standards EN / IEC
61000-4-5.
7.3.1 Test configuration for power line coupling
Test pulses are injected directly into the EUT power supply lines as they pass through the mains
CDN 3153-S63. 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.
7.3.2 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 couppler it is possible to superimpose the interference signal, as specified in the standards, on
communication cables and other kinds of data lines.
The same HV output sockets may also be used for connection to all other CDNs.
Front time Tf
= 1.67 x T = 1.2 μs ± 30%
Duration Td = Tw=
50 μs ± 20%
Wave shape of open circuit voltage (1.2 / 50 μs), wave shape definition according to
IEC / EN 61000-4-5.
Front time T1 = 1.25 x Tr = 8 μs ± 20%
Duration: Td =1.18 x Tw = 20 μs ± 20%
Wave shape of short circuit current (8 / 20 μs), wave shape definition according to
IEC / EN 61000-4-5.