Haefely Technology AXOS5, Руководство пользователя

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AXOS
5
Compact immunity test System 13
6 Surge
6.1 General information
Please read carefully the Table 5-1 and Table 5-2 in detail before first use of the Surge generator. The short voltage
impulse stays on the EUT during several µs. The peak voltage gets with the Axos5 up to 5 kV. The generator fulfils the
requirements according to the IEC 61000-4-5 norm. The source impedance of the generator is 2
Ω . The HI and COM
signals should be used from the beginning as scheduled, because in extern CDN the polarity becomes important. It
can be select either between the Hi and Com output or the coupling network (Position 9,10,11 in Figure 5-1).
6.2 Combination wave generator
In General waveforms are specified as open circuit voltage (OCV) and short circuit current (SCC). The Surge is applied
directly from the Generator to the Surge HI and COM output, the waveforms are specified in the next two under
captures. The function graphic and the key parameter can be read in the Table 6-1. In accordance to the IEC 60060-1
the front time for the OCV is 1,2 µs ± 30% and the SCC is 8 µs ± 20%.
IEC 60060-1 Definitions
Front time [µs] Time to half value [µs]
Open circuit voltage 1,2 ± 30% 50 ± 20%
Short circuit current 8 ± 20% 20 ± 20%
Table 6-1: Key parameter wave generator
For a detailed description please read the topic “test instrumentation” in the IEC 61000-4-5 norm.
6.2.1 Open Circuit Voltage (OCV)
Figure 6-1: Open circuit voltage (OCV) [1]
Front time:
T1 = 1,67 x T = 1,2µs ± 30%
Time to half value: T2 = 50µs ± 20%
Verification of the Surge output signal (HI and COM) in the front view can be done with the help of the in capture 12.1.1
described PDP 8000.