Characterization of the lightning wave: Difference between revisions
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*2 types of current wave are considered by the IEC standards: | *2 types of current wave are considered by the IEC standards: | ||
- 10/350 µs wave: to characterize the current waves from a direct lightning stroke (see | - 10/350 µs wave: to characterize the current waves from a direct lightning stroke (see {{FigRef|J9}}); | ||
[[File:Fig J09a.jpg|none]] | [[File:Fig J09a.jpg|none]] | ||
'''''Fig. J9:'''''<i> 10/350 µs current wave</i> | '''''Fig. J9:'''''<i> 10/350 µs current wave</i> | ||
- 8/20 µs wave: to characterize the current waves from an indirect lightning stroke (see {{FigRef|J10}}). | |||
- 8/20 µs wave: to characterize the current waves from an indirect lightning stroke (see | |||
[[File:Fig J10.jpg|none]] | [[File:Fig J10.jpg|none]] | ||
'''''Fig. J10:'''''<i> 8/20 µs current wave</i> | '''''Fig. J10:'''''<i> 8/20 µs current wave</i> | ||
These two types of lightning current wave are used to define tests on SPDs (IEC standard 61643-11) and equipment immunity to lightning currents.<br>The peak value of the current wave characterizes the intensity of the lightning stroke. | These two types of lightning current wave are used to define tests on SPDs (IEC standard 61643-11) and equipment immunity to lightning currents.<br>The peak value of the current wave characterizes the intensity of the lightning stroke. | ||
*'''The overvoltages '''created by lightning strokes are characterized by a 1.2/50 µs voltage wave (see | *'''The overvoltages '''created by lightning strokes are characterized by a 1.2/50 µs voltage wave (see {{FigRef|J11}}). | ||
-- | This type of voltage wave is used to verify equipment's withstand to overvoltages of atmospheric origin (impulse voltage as per IEC 61000-4-5). | ||
[[File:Fig J09 EN.jpg|none]] | [[File:Fig J09 EN.jpg|none]] | ||
Revision as of 09:55, 2 December 2016
Analysis of the phenomena allows definition of the types of lightning current and voltage waves.
- 2 types of current wave are considered by the IEC standards:
- 10/350 µs wave: to characterize the current waves from a direct lightning stroke (see Fig. J9);
Fig. J9: 10/350 µs current wave
- 8/20 µs wave: to characterize the current waves from an indirect lightning stroke (see Fig. J10).
Fig. J10: 8/20 µs current wave
These two types of lightning current wave are used to define tests on SPDs (IEC standard 61643-11) and equipment immunity to lightning currents.
The peak value of the current wave characterizes the intensity of the lightning stroke.
- The overvoltages created by lightning strokes are characterized by a 1.2/50 µs voltage wave (see Fig. J11).
This type of voltage wave is used to verify equipment's withstand to overvoltages of atmospheric origin (impulse voltage as per IEC 61000-4-5).
Fig. J11: 1.2/50 µs voltage wave
