XZERES Wind Skystream 3.7, Руководство пользователя

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Skystream Owner’s Manual
3-CMLT-1054 Rev O XCO 1191
Pg. 51
Table 4 - Lightning Protection Efficiency for 70 ft (21 m) Towers
Isolated Flat Land Hill or Knoll Non-Isolated Flat Land
Ng efficiency efficiency efficiency
Nc =
1/100
Nc =
1/1000
Nc =
1/10000
Nc =
1/100
Nc =
1/1000
Nc =
1/10000
Nc =
1/100
Nc =
1/1000
Nc =
1/10000
0.01 0.001 0.0001 0.01 0.001 0.0001 0.01 0.001 0.0001
1 0.352 0.935 0.994 0.676 0.968 0.997 -0.296 0.870 0.987
2 0.676 0.968 0.997 0.838 0.984 0.998 0.352 0.935 0.994
3 0.784 0.978 0.998 0.892 0.989 0.999 0.568 0.957 0.996
4 0.838 0.984 0.998 0.919 0.992 0.999 0.676 0.968 0.997
5 0.870 0.987 0.999 0.935 0.994 0.999 0.741 0.974 0.997
6 0.892 0.989 0.999 0.946 0.995 0.999 0.784 0.978 0.998
7 0.907 0.991 0.999 0.954 0.995 1.000 0.815 0.981 0.998
8 0.919 0.992 0.999 0.960 0.996 1.000 0.838 0.984 0.998
9 0.928 0.993 0.999 0.964 0.996 1.000 0.856 0.986 0.999
10 0.935 0.994 0.999 0.968 0.997 1.000 0.870 0.987 0.999
11 0.941 0.994 0.999 0.971 0.997 1.000 0.882 0.988 0.999
12 0.946 0.995 0.999 0.973 0.997 1.000 0.892 0.989 0.999
13 0.950 0.995 1.000 0.975 0.998 1.000 0.900 0.990 0.999
14 0.954 0.995 1.000 0.977 0.998 1.000 0.907 0.991 0.999
15 0.957 0.996 1.000 0.978 0.998 1.000 0.914 0.991 0.999
16 0.960 0.996 1.000 0.980 0.998 1.000 0.919 0.992 0.999
17 0.962 0.996 1.000 0.981 0.998 1.000 0.924 0.992 0.999
18 0.964 0.996 1.000 0.982 0.998 1.000 0.928 0.993 0.999
19 0.966 0.997 1.000 0.983 0.998 1.000 0.932 0.993 0.999
20 0.968 0.997 1.000 0.984 0.998 1.000 0.935 0.994 0.999
30 0.978 0.998 1.000 0.989 0.999 1.000 0.957 0.996 1.000
40 0.984 0.998 1.000 0.992 0.999 1.000 0.968 0.997 1.000
50 0.987 0.999 1.000 0.994 0.999 1.000 0.974 0.997 1.000
60 0.989 0.999 1.000 0.995 0.999 1.000 0.978 0.998 1.000
70 0.991 0.999 1.000 0.995 1.000 1.000 0.981 0.998 1.000
The Lightning Protection Level
Refer to Table 5
, the “Lightning Protection Level” and using the Efficiency (E) determine the Lightning
Protection Level (LPL) and corresponding peak lightning current discharge capability.
Lightning Protection Level 1 provides highest level of protection and Lightning Protection Level 4, the
lowest level of protection.
Table 5 - Lightning Protection Level
Efficiency Lightning Protection Level
E > 0.980 Lightning Protection Level 1
with additional measures
0.95 < E < = 0.98 Lightning Protection Level 1
0.90 < E < = 0.95 Lightning Protection Level 2
0.80 < E < = 0.90 Lightning Protection Level 3
0 < E < = 0.80 Lightning Protection Level 4