Height and protection radius(m)
Note: The above data is the test result when the height of the lightning rod H = 5 meters. Calculation method of the protection radius of the active pre-discharge lightning rod Suppose that the forestall start time of the lightning rod is T, then the forestall distance of upward leader△ L=V=V* △T according to the calculation method provided by NFC-17-102standard, the protection radius Rp is calculated according to the following formula: Representative= h(2D-h)+ △ L(2d+ △ L)h≥5 D motor distance, it depends on the level of protected buildings, for level Ill protection object,D values are20m, 45m,60m separately. h is the distance from the top of the lightning rod to the protected plane. o T is tested by the evaluation and calculated (see table above) V=106m/s, △ L=V* △T
Main technical parameters
