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Calculation of TQYF lightning rod is protective radius
Calaulation of TQYF lightning rod is protective radius
Based on NFC17-10 provision, the needlepoint should be higher than horizontal plane of proteched object 2M (h1),its protective range (radius) separately is Rp2,Rp3,Rpn correspondingly provided the installation height of lighting rod separately is h2,h3hn etc.
It should take the lightning protection protection class of protected object,local thunderstorm and geologicl landform circumstance etc accout when setting calculation of mula.
The protective radius of TQYF model is related to height(h)staring anticipating timemodel of lightning rod and chosen protective class :when h5
Notes:the Rp in formula represents protective radius on horizontal plane considered
h represents height difference between needlepoint and top of protected object;
D represents upward anticipating (distance)
L represents upward anticipating (distance)
=V (meter/microsecond)T (microsecond)
V represents lead transmission speed,experiment data indicates; V1 meter/microsecond Based on France national-standard NFC17-102
The 1st kind building is 20m (GB50057-94 specifies :D=30m)
The 2st kind building is 45m
The 3st kind building is 60m

When h<5, protective radius refers to table

The corresponding protective radius(Rp),protective type of different lightning protectin building to TQYF lightning rod of different model and installation height

TQYF
Needlepoint height

H=the height over protected object(m)
2 2 2 2 2 2 2 2 2
The 1st kind lightning protection building(radius of grounder is 30m)
TQYF 19 19 19 19 19 19 19 19 19
TQYF 26 26 26 26 26 26 26 26 26
TQYF 30 30 30 30 30 30 30 30 30
TQYF 35 35 35 35 35 35 35 35 35
The 1st kind lightning protection building(radius of grounder is 45m)
TQYF 23 23 23 23 23 23 23 23 23
TQYF 30 30 30 30 30 30 30 30 30
TQYF 35 35 35 35 35 35 35 35 35
TQYF 40 40 40 40 40 40 40 40 40
The 1st kind lightning protection building(radius of grounder is 60m)
TQYF 26 26 26 26 26 26 26 26 26
TQYF 33 33 33 33 33 33 33 33 33
TQYF 38 38 38 38 38 38 38 38 38
TQYF 44 44 44 44 44 44 44 44 44
Calculation of TQYF lightning rods protective radius
Model and performance

Model and performance of TQYF lightning rod

Model of lightning rod Advance discharge gime T
TQYF Lightnign rod 25microsecond
TQYF Lightnign rod 40microsecond
TQYF Lightnign rod 50microsecond
TQYF Lightnign rod 60microsecond

Notes:the setting range of above advance discharge timeT value is stipulated in France national lightning protection standard NFC17-102, the actual test value is bigger than given value.

Installation instruction
    Installing TQYF lightning rod in our country must strictly abide by obligatory provision stated in lightning protection standard of the Peoples Republic of China[buidings lightning protection design morm] (GB50057-94)
The lightning protection kind of building is determined based on areaheightlocal thunder & lightning day numbersgeographic environmental correction factor and using characteristic of protected building.
Determining chosen quantity of TQYF lihting rod based on lighning protection category and building ares.
The downlead should be electrical-connected with main reinforcing steel of building.or.set two or more downleads according to provision.
The downlead should be made as off/on clip and insulating protection around the ground
Earthing body ,earth resistance and lightning protection network must be set in the light of lighning protection standard GB50057-94,
The guarantee period of lightning protection product is twenty years.
  Installation Master drawing of TQYF lightning rod
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