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Separation Distance. Proximity between the telecommunication line and the down conductor. Telecommunication line. Faulty installation Separation distance?. s?. s?. Separation distance s Problematic installation of metal lines. s. e.g. e.g. electric line. l. - PowerPoint PPT Presentation
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© 2012 DEHN + SÖHNE / protected by ISO 16016 1
Separation Distance
Separation Distance
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 2
Proximity between the telecommunication line and the down conductor
Telecommunication line
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 3
Faulty installationSeparation distance?
s?
s?
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 4
Separation distance sProblematic installation of metal lines
06.10.09 / S6047e
e.g. e.g. electric line
Ref.: IEC 62305-3:2006; Annex E, Figure E.38
s
l
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 5
Electrical insulation of the external LPS
IEC 62305-3:2006, 6.3
kcs = ki l
km
“The electrical insulation between the air-termination or the down-conductor and the structural metal parts, the metal installations and the internal systems can be achieved by providing a distance d between the parts greater than the separation distance s‘:
ki depends on the selected class of LPS (see Table 10);
kc depends on the lightning current flowing on the down conductors (see Table 11);
km depends on the electrical insulation material (see Table 12);
l is the length, in metres, along the air-termination or the down-conductor, from the point where the separation distance is to be considered, to the nearest equipotential bonding point.“
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 6
Insulation of the external LPSValues of coefficients ki and km
Ref.: IEC 62305-3:2006, 6.3, Table 10 + 12 *DEHNiso value stated by DEHN + SÖHNE (Dr. Zischank VAZ)
Class of LPS ki
Material km
NOTE 1 When there are several insulating materials in series, it is good practice to use the lower value for km.NOTE 2 The use of other insulating materials is under consideration.
I 0.08II 0.06III and IV 0.04
Air 1Concrete, bricks 0.5DEHNiso* spacer / Combi 0.7
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 7
Separation distanceCoefficient kc for an air-termination rod
S
Individual air-termination rod
kc = 1
Ref.: IEC 62305-3:2006, Annex C, Figure C.1
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 8
Formulas for the calculation of the partitioning coefficient kc
Formula for the calculation of the partitioning coefficient kc in case of two down conductors and a type B earth-termination system
h + ckc = ————
2h + c
1 ckc = + 0,1 + 0,2 2 n h
3
Basic formula for the calculation of the partitioning coefficient kc
Legend:n Total number of down conductorsc Distance of a down conductor to the next down conductorh Spacing (or height) between ring conductors
Ref.: IEC 62305-3:2006, Annex C, Figure C.2
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 9
Formulas for the calculation of the partitioning coefficient kc
From the point of proximity to the 1st node kc1 = 1
From the 1st node to the next node• in case of two outgoing lines kc2 = 0.5 • in case of three outgoing lines kc2 = 0.33 • in case of four outgoing lines kc2 = 0.25
National specification for the partitioning coefficient kc
for buildings with “meshed“ air-termination system
Every further node reduces the kc value* by half
* NOTE: The value should not be smaller than 1n
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 10
Calculation example of the separation distance sBuilding with gable roof, class of LPS III
Calculation according to IEC 62305-3
Number of down conductors: 4
8 m
c = 14 m
l = 12 m 1 ckc = + 0.1 + 0.2 2 n h
3h = 6 m
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 11
Calculation of kc according to IEC 62305-3
Calculation example of the separation distance sBuilding with gable roof, class of LPS III
1 ckc = + 0.1 + 0.2 2 n h
3
1 3 14 kc = + 0.1 + 0.2 = 0.490
2 4 6
n = 4 Total number of
down conductors
h = 6 m Height or spacing
of the ring conductors, gutter
c = 14 m Max. distance between two down conductors
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 12
Calculation example of the separation distance sBuilding with gable roof, class of LPS III
kcs = ki l (m)km
s = 0.04 12 m = 0.47 m0.490
0.5
Coefficient class of LPS III: ki = 0.04
Partitioning coefficient: kc = 0.490
Material used for the isolating distance Brick: km = 0.5
Length along the air-termination conductor / down conductor: l = 12 m
Calculation of s according to IEC 62305-3
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 13
Calculation example of the separation distance sBuilding with gable roof, class of LPS III
Calculation of s according to IEC 62305-3
Number of down conductors: 4
8 m 14 m
s = 0.04 17 m = 0.66 m0.490
0.5l = 17 m
Lamp
•Lamp •Conductors•Heating •Water ...
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance
Separation distance - Example 2.2 km = solid materialAir-term. rod connected twice to the mesh network
l=10m
Air-termination rod
Roof superstructure
s = ki (kc1 l1 + kc2 l2 + ... + kcn ln) / km =s = 0.06 (0,5 8m + 0.25 4m + 0.125 10m + 0.063 10m + 0.042 8m) / 0.5 =s = 0.87m for solid material
kc6=0.042l6 = 8 m
kc5=0.063l5 = 10 m
kc2= 0.5l2 = 8 m
kc3= 0.25l3 = 4 m
Roof superstructureh = 2m
20 m
kc4=0.125l4 = 10 m
kc2= 0.5l2 = 8 m
s
Class of LPS IIHeight of the building h / length l to the earth-termination system: l = 8m Mesh size: 10m x 10mNumber of down cond.: n = 24 Min. value for kc: = = 0.0421
n1
24
© 2012 DEHN + SÖHNE / protected by ISO 16016 15
Separation Distance
Calculation according to Nodal Analysis
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 16
Nodal analysis - Software for the determination of the separation distance sEvery line is shown as a resistor.
The voltages of the nodes, i.e. the difference between the node potentials, are calculated by means of the supply of a defined lightning current and the mathematical solution of the equation.
= node
R14 R15 R16 R17
R6 R7 R8 R9 R10 R11 R12 R13
R2 R3 R4 R5
R1
I
0V 0V 0V 0V
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 17
Model for the determination of current division Nodal analysis
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 18
DEHN Distance ToolStart software
Spearartion distance calculated according to
nodal analysis
© 2012 DEHN + SÖHNE / protected by ISO 16016 19
DEHNconductorHVI® Conductor
TechnologyFields of Application
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 20
Basic development of a creepage discharge at the HVI conductor with special coating
Insulation, semiconducting
Inner conductor
EB connection via earthing clamp
Proximity to earthed metal parts
© 2012 DEHN + SÖHNE / protected by ISO 16016 HVI-Seminar HVI-Leitungen
External coating(weather and UV resistant)
Conductive shield(e.g. braided copper)
Field control
HV-Insulationconductor
Connection with the air termination
Induction of the lightning current(feeding point)
Coaxial Cables with Field Control andConductive Shield as insulated Down-conductors
© 2012 DEHN + SÖHNE / protected by ISO 16016 HVI-Seminar HVI-Leitungen 11.12.03 / 3465
Lit.:
connection toequipotential bonding
high-voltageresistant isolation
inner conductor
connection to the air-termination system
incoming lightningimpulse current
semi-conductivecoating
sealing unit area
Basic illustration of the structure of an isolated down conductor with semiconductive coating
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 23
DEHNconductor system, HVI® conductor I
Conductor length has to be specified
EB clamp Part No. 405 020
Conductor holder Part No. 275 120
Head piece
HVI conductor I Part No. 819 020
Fixed EB element
Earth connection element (removable)
Sealing end sectionEarth connection
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 24
Installation of the different types of HVI® conductors
HVI® conductor type I
EB connection
Sealing end
HVI® conductor type II
EB connection
HVI® conductor II,fixed length,secong sealing endfixed
Sealing end
HVI® conductor type III
HVI® conductor III,can be cut to length,second sealing endhas to be mounted
Sealing end
EB connection
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 25
Isolate air-termination system for mobile radio stations DEHNconductor system HVI® conductor
Source: Bischof-Blitzschutz, Weyhe
Air-termination tip
GRP supporting tube
No metal parts may be installed in the sealing end section!
HVI® conductor
EB element
Aluminium supporting tube
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 26
Grey HVI® conductor installed in the supporting tube with integrated sealing end and air-termination tip
HVI® conductor IIPart No. 819 324
HVI® conductor IPart No. 819 323
HVI® conductor IIIPart No. 819 325
GRP supporting tube
HVI conductor
Air-termination rod
Aluminium supportingtube
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 27
Cable duct
Cable duct
Foundation earth electrode
Isolated air-termination system
Metal roof superstructure
Reinforcement
Voltage-controlled insulated down conductorSeparation distance is maintained
a
Sealing end metal capping of the parapet locatedin the protection area of an isolated air-termination system is connected to equipotential bonding
Insulated HVI® conductor I
Equipotential bondingconnection
Equivalent separation distanceof the HVI conductor:s = 0.75 m in airs = 1.50 m for solid material
Separation distance s
© 2012 DEHN + SÖHNE / protected by ISO 16016 28
Isolated Lightning Protection
Air-Termination Masts and HVI Conductor Light
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 29
DEHNconductor system / HVI® conductor light
Disposable reel made of plywood(Ø approx. 80 cm), width approx. 50 cmTotal weight approx. 66 kg
HVI conductor light
Prerequisite for the use of HVI conductors light: Separation distance 0.45 m (in air)
Length 100 m on a reel: Part No. 819 125
Equiv. separ. distance s 0.45 m (in air) 0.90 m (solid material)
Core Copper (soft)Cross-section 19 mm²Insulation PE (polyethylene)Outer diameter 20 mm
(black sheath 17 mm)Colour Dark grey
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 30
Isolated lightning protection systemHVIÒ conductor light, class of LPS III
Detail Aair-termination mast HVI conductor light
30 m
18.1
m
Detail Aair-terminat-ion mast
15 m
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 31
1.90 m
27 m
Protection area Protection area
Protection areaProtection area
20 m
Isolated lightning protection systemHVIÒ conductor light, class of LPS III
HVI conductor light
1.5 m
30 m
1.5 m
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 34
DEHNconductor system / HVI® conductor light Isolated air-termination system, air-termination mast
SET I Air-termination tip 1000 mm
total height 2900 mm,with
supporting tubeand tripod
Air-t
erm
. tip
1mNo electrically
conductive or earthed parts may be located in this protection area!
s a
djus
tmen
t ran
ge a
ppro
x. 1
40 c
m
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 35
DEHNconductor system / HVI® conductor light Isolated air-termination system, flat roof
SET II Air-termination rod 2000 mm
total height 3900 mm,with
supporting tubeand tripod
Air-t
erm
. rod
2m
© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 36
DEHNconductor system / HVI® conductor light Isolated air-termination system, flat roof
Connecting plate with 4 connection possibilities
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