9 Ring Wave (Axos
8
Only)
9.1 General Information
The Ring wave impulse generator creates impulses in accordance to the IEC 61000-4-12 ed.3
and ANSI C62.41 norm. Test level up to 7 kV is defined. Waveform has similar characteristics in
open circuit voltage as well as short circuit condition. It can be selected between an impedance
of 12 Ohm and 30 Ohm on the touch screen accorded to IEC 61000-4-12 norm.
Chapter Operating Instructions must be carefully read before first use of the Ring Wave generator.
The peak voltage gets up to 7 kV. The HI and COM signals should be used from the beginning
as scheduled, because with 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 6-1 Axos
Front view). Furthermore, 3 phase CDN, likely the FP SURGE100M2 or FP-COMB 32 can be
chosen.
9.1.1 Open Circuit Voltage (OCV) Ring Wave
Following output impulse form is defined as the Ring Wave impulse in accordance to IEC 61000-
4-12 and ANSI C62.41.
Figure 9-1: Ring wave impulse
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